diff --git a/.github/labeler.yml b/.github/labeler.yml
index 97ca9284d0e..d4614e38d16 100644
--- a/.github/labeler.yml
+++ b/.github/labeler.yml
@@ -39,5 +39,5 @@
     # Unit tests
     - any-glob-to-any-file: "src/*/tests/**/*"
     # Functional and integration tests
-    - any-glob-to-any-file: "tests/functional/**/*"
+    - any-glob-to-any-file: "src/nix-functional-tests/**/*"
 
diff --git a/.gitignore b/.gitignore
index 4d38caed289..ae974ab388c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -95,25 +95,25 @@ perl/Makefile.config
 
 /src/build-remote/build-remote
 
-# /tests/functional/
-/tests/functional/test-tmp
-/tests/functional/common/subst-vars.sh
-/tests/functional/result*
-/tests/functional/restricted-innocent
-/tests/functional/shell
-/tests/functional/shell.drv
-/tests/functional/config.nix
-/tests/functional/ca/config.nix
-/tests/functional/dyn-drv/config.nix
-/tests/functional/repl-result-out
-/tests/functional/debugger-test-out
-/tests/functional/test-libstoreconsumer/test-libstoreconsumer
-
-# /tests/functional/lang/
-/tests/functional/lang/*.out
-/tests/functional/lang/*.out.xml
-/tests/functional/lang/*.err
-/tests/functional/lang/*.ast
+# /src/nix-functional-tests/
+/src/nix-functional-tests/test-tmp
+/src/nix-functional-tests/common/subst-vars.sh
+/src/nix-functional-tests/result*
+/src/nix-functional-tests/restricted-innocent
+/src/nix-functional-tests/shell
+/src/nix-functional-tests/shell.drv
+/src/nix-functional-tests/config.nix
+/src/nix-functional-tests/ca/config.nix
+/src/nix-functional-tests/dyn-drv/config.nix
+/src/nix-functional-tests/repl-result-out
+/src/nix-functional-tests/debugger-test-out
+/src/nix-functional-tests/test-libstoreconsumer/test-libstoreconsumer
+
+# /src/nix-functional-tests/lang/
+/src/nix-functional-tests/lang/*.out
+/src/nix-functional-tests/lang/*.out.xml
+/src/nix-functional-tests/lang/*.err
+/src/nix-functional-tests/lang/*.ast
 
 /perl/lib/Nix/Config.pm
 /perl/lib/Nix/Store.cc
diff --git a/.shellcheckrc b/.shellcheckrc
index de98055f719..d0b46b9e63c 100644
--- a/.shellcheckrc
+++ b/.shellcheckrc
@@ -1,4 +1,4 @@
 external-sources=true
 source-path=SCRIPTDIR
-# Hack for scripts in e.g. tests/functional/ca
+# Hack for scripts in e.g. src/nix-functional-tests/ca
 source-path=SCRIPTDIR/..
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index ad867896269..e7701f3a61d 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -76,7 +76,7 @@ Check out the [security policy](https://github.com/NixOS/nix/security/policy).
 
    - [ ] Fixes an [idea approved](https://github.com/NixOS/nix/labels/idea%20approved) issue
    - [ ] Tests, as appropriate:
-     - Functional tests – [`tests/functional/**.sh`](./tests/functional)
+     - Functional tests – [`src/nix-functional-tests/**.sh`](./src/nix-functional-tests)
      - Unit tests – [`src/*/tests`](./src/)
      - Integration tests – [`tests/nixos/*`](./tests/nixos)
    - [ ] User documentation in the [manual](./doc/manual/source)
diff --git a/Makefile b/Makefile
index 757ea54b927..bfc64f345d2 100644
--- a/Makefile
+++ b/Makefile
@@ -53,14 +53,14 @@ endif
 ifeq ($(ENABLE_FUNCTIONAL_TESTS), yes)
 ifdef HOST_UNIX
 makefiles += \
-  tests/functional/local.mk \
-  tests/functional/flakes/local.mk \
-  tests/functional/ca/local.mk \
-  tests/functional/git-hashing/local.mk \
-  tests/functional/dyn-drv/local.mk \
-  tests/functional/local-overlay-store/local.mk \
-  tests/functional/test-libstoreconsumer/local.mk \
-  tests/functional/plugins/local.mk
+  src/nix-functional-tests/local.mk \
+  src/nix-functional-tests/flakes/local.mk \
+  src/nix-functional-tests/ca/local.mk \
+  src/nix-functional-tests/git-hashing/local.mk \
+  src/nix-functional-tests/dyn-drv/local.mk \
+  src/nix-functional-tests/local-overlay-store/local.mk \
+  src/nix-functional-tests/test-libstoreconsumer/local.mk \
+  src/nix-functional-tests/plugins/local.mk
 endif
 endif
 
diff --git a/doc/manual/source/development/testing.md b/doc/manual/source/development/testing.md
index 0df72cc38b7..aac7c200b10 100644
--- a/doc/manual/source/development/testing.md
+++ b/doc/manual/source/development/testing.md
@@ -128,7 +128,7 @@ On other platforms they wouldn't be run at all.
 
 ## Functional tests
 
-The functional tests reside under the `tests/functional` directory and are listed in `tests/functional/local.mk`.
+The functional tests reside under the `src/nix-functional-tests` directory and are listed in `src/nix-functional-tests/local.mk`.
 Each test is a bash script.
 
 Functional tests are run during `installCheck` in the `nix` package build, as well as separately from the build, in VM tests.
@@ -145,7 +145,7 @@ $ mesonCheckPhase
 
 Sometimes it is useful to group related tests so they can be easily run together without running the entire test suite.
 Each test group is in a subdirectory of `tests`.
-For example, `tests/functional/ca/meson.build` defines a `ca` test group for content-addressed derivation outputs.
+For example, `src/nix-functional-tests/ca/meson.build` defines a `ca` test group for content-addressed derivation outputs.
 
 That test group can be run like this:
 
@@ -184,7 +184,7 @@ regardless of whether the test succeeds or fails.
 Tests can be also run directly without `meson`:
 
 ```shell-session
-$ TEST_NAME=${testName} NIX_REMOTE='' PS4='+(${BASH_SOURCE[0]-$0}:$LINENO) tests/functional/${testName}.sh
+$ TEST_NAME=${testName} NIX_REMOTE='' PS4='+(${BASH_SOURCE[0]-$0}:$LINENO) src/nix-functional-tests/${testName}.sh
 +(${testName}.sh:1) foo
 output from foo
 +(${testName}.sh:2) bar
@@ -217,7 +217,7 @@ edit it like so:
 Then, running the test with `./mk/debug-test.sh` will drop you into GDB once the script reaches that point:
 
 ```shell-session
-$ ./mk/debug-test.sh tests/functional/${testName}.sh
+$ ./mk/debug-test.sh src/nix-functional-tests/${testName}.sh
 ...
 + gdb blash blub
 GNU gdb (GDB) 12.1
diff --git a/maintainers/flake-module.nix b/maintainers/flake-module.nix
index ff3b5e8edbc..ce46d8a9964 100644
--- a/maintainers/flake-module.nix
+++ b/maintainers/flake-module.nix
@@ -422,8 +422,8 @@
             ''^src/nix/verify\.cc$''
             ''^src/nix/why-depends\.cc$''
 
-            ''^tests/functional/plugins/plugintest\.cc''
-            ''^tests/functional/test-libstoreconsumer/main\.cc''
+            ''^src/nix-functional-tests/plugins/plugintest\.cc''
+            ''^src/nix-functional-tests/test-libstoreconsumer/main\.cc''
             ''^tests/nixos/ca-fd-leak/sender\.c''
             ''^tests/nixos/ca-fd-leak/smuggler\.c''
             ''^tests/nixos/user-sandboxing/attacker\.c''
@@ -501,155 +501,155 @@
             ''^scripts/install-nix-from-closure\.sh$''
             ''^scripts/install-systemd-multi-user\.sh$''
             ''^src/nix/get-env\.sh$''
-            ''^tests/functional/build\.sh$''
-            ''^tests/functional/ca/build-dry\.sh$''
-            ''^tests/functional/ca/build-with-garbage-path\.sh$''
-            ''^tests/functional/ca/common\.sh$''
-            ''^tests/functional/ca/concurrent-builds\.sh$''
-            ''^tests/functional/ca/eval-store\.sh$''
-            ''^tests/functional/ca/gc\.sh$''
-            ''^tests/functional/ca/import-from-derivation\.sh$''
-            ''^tests/functional/ca/new-build-cmd\.sh$''
-            ''^tests/functional/ca/nix-shell\.sh$''
-            ''^tests/functional/ca/post-hook\.sh$''
-            ''^tests/functional/ca/recursive\.sh$''
-            ''^tests/functional/ca/repl\.sh$''
-            ''^tests/functional/ca/selfref-gc\.sh$''
-            ''^tests/functional/ca/why-depends\.sh$''
-            ''^tests/functional/characterisation-test-infra\.sh$''
-            ''^tests/functional/check\.sh$''
-            ''^tests/functional/common/vars-and-functions\.sh$''
-            ''^tests/functional/completions\.sh$''
-            ''^tests/functional/compute-levels\.sh$''
-            ''^tests/functional/config\.sh$''
-            ''^tests/functional/db-migration\.sh$''
-            ''^tests/functional/debugger\.sh$''
-            ''^tests/functional/dependencies\.builder0\.sh$''
-            ''^tests/functional/dependencies\.sh$''
-            ''^tests/functional/dump-db\.sh$''
-            ''^tests/functional/dyn-drv/build-built-drv\.sh$''
-            ''^tests/functional/dyn-drv/common\.sh$''
-            ''^tests/functional/dyn-drv/dep-built-drv\.sh$''
-            ''^tests/functional/dyn-drv/eval-outputOf\.sh$''
-            ''^tests/functional/dyn-drv/old-daemon-error-hack\.sh$''
-            ''^tests/functional/dyn-drv/recursive-mod-json\.sh$''
-            ''^tests/functional/eval-store\.sh$''
-            ''^tests/functional/eval\.sh$''
-            ''^tests/functional/export-graph\.sh$''
-            ''^tests/functional/export\.sh$''
-            ''^tests/functional/extra-sandbox-profile\.sh$''
-            ''^tests/functional/fetchClosure\.sh$''
-            ''^tests/functional/fetchGit\.sh$''
-            ''^tests/functional/fetchGitRefs\.sh$''
-            ''^tests/functional/fetchGitSubmodules\.sh$''
-            ''^tests/functional/fetchGitVerification\.sh$''
-            ''^tests/functional/fetchMercurial\.sh$''
-            ''^tests/functional/fetchurl\.sh$''
-            ''^tests/functional/fixed\.builder1\.sh$''
-            ''^tests/functional/fixed\.builder2\.sh$''
-            ''^tests/functional/fixed\.sh$''
-            ''^tests/functional/flakes/absolute-paths\.sh$''
-            ''^tests/functional/flakes/check\.sh$''
-            ''^tests/functional/flakes/common\.sh$''
-            ''^tests/functional/flakes/config\.sh$''
-            ''^tests/functional/flakes/develop\.sh$''
-            ''^tests/functional/flakes/flakes\.sh$''
-            ''^tests/functional/flakes/follow-paths\.sh$''
-            ''^tests/functional/flakes/prefetch\.sh$''
-            ''^tests/functional/flakes/run\.sh$''
-            ''^tests/functional/flakes/show\.sh$''
-            ''^tests/functional/fmt\.sh$''
-            ''^tests/functional/fmt\.simple\.sh$''
-            ''^tests/functional/gc-auto\.sh$''
-            ''^tests/functional/gc-concurrent\.builder\.sh$''
-            ''^tests/functional/gc-concurrent\.sh$''
-            ''^tests/functional/gc-concurrent2\.builder\.sh$''
-            ''^tests/functional/gc-non-blocking\.sh$''
-            ''^tests/functional/gc\.sh$''
-            ''^tests/functional/git-hashing/common\.sh$''
-            ''^tests/functional/git-hashing/simple\.sh$''
-            ''^tests/functional/hash-convert\.sh$''
-            ''^tests/functional/help\.sh$''
-            ''^tests/functional/impure-derivations\.sh$''
-            ''^tests/functional/impure-env\.sh$''
-            ''^tests/functional/impure-eval\.sh$''
-            ''^tests/functional/install-darwin\.sh$''
-            ''^tests/functional/lang\.sh$''
-            ''^tests/functional/legacy-ssh-store\.sh$''
-            ''^tests/functional/linux-sandbox\.sh$''
-            ''^tests/functional/local-overlay-store/add-lower-inner\.sh$''
-            ''^tests/functional/local-overlay-store/add-lower\.sh$''
-            ''^tests/functional/local-overlay-store/bad-uris\.sh$''
-            ''^tests/functional/local-overlay-store/build-inner\.sh$''
-            ''^tests/functional/local-overlay-store/build\.sh$''
-            ''^tests/functional/local-overlay-store/check-post-init-inner\.sh$''
-            ''^tests/functional/local-overlay-store/check-post-init\.sh$''
-            ''^tests/functional/local-overlay-store/common\.sh$''
-            ''^tests/functional/local-overlay-store/delete-duplicate-inner\.sh$''
-            ''^tests/functional/local-overlay-store/delete-duplicate\.sh$''
-            ''^tests/functional/local-overlay-store/delete-refs-inner\.sh$''
-            ''^tests/functional/local-overlay-store/delete-refs\.sh$''
-            ''^tests/functional/local-overlay-store/gc-inner\.sh$''
-            ''^tests/functional/local-overlay-store/gc\.sh$''
-            ''^tests/functional/local-overlay-store/optimise-inner\.sh$''
-            ''^tests/functional/local-overlay-store/optimise\.sh$''
-            ''^tests/functional/local-overlay-store/redundant-add-inner\.sh$''
-            ''^tests/functional/local-overlay-store/redundant-add\.sh$''
-            ''^tests/functional/local-overlay-store/remount\.sh$''
-            ''^tests/functional/local-overlay-store/stale-file-handle-inner\.sh$''
-            ''^tests/functional/local-overlay-store/stale-file-handle\.sh$''
-            ''^tests/functional/local-overlay-store/verify-inner\.sh$''
-            ''^tests/functional/local-overlay-store/verify\.sh$''
-            ''^tests/functional/logging\.sh$''
-            ''^tests/functional/misc\.sh$''
-            ''^tests/functional/multiple-outputs\.sh$''
-            ''^tests/functional/nar-access\.sh$''
-            ''^tests/functional/nested-sandboxing\.sh$''
-            ''^tests/functional/nested-sandboxing/command\.sh$''
-            ''^tests/functional/nix-build\.sh$''
-            ''^tests/functional/nix-channel\.sh$''
-            ''^tests/functional/nix-collect-garbage-d\.sh$''
-            ''^tests/functional/nix-copy-ssh-common\.sh$''
-            ''^tests/functional/nix-copy-ssh-ng\.sh$''
-            ''^tests/functional/nix-copy-ssh\.sh$''
-            ''^tests/functional/nix-daemon-untrusting\.sh$''
-            ''^tests/functional/nix-profile\.sh$''
-            ''^tests/functional/nix-shell\.sh$''
-            ''^tests/functional/nix_path\.sh$''
-            ''^tests/functional/optimise-store\.sh$''
-            ''^tests/functional/output-normalization\.sh$''
-            ''^tests/functional/parallel\.builder\.sh$''
-            ''^tests/functional/parallel\.sh$''
-            ''^tests/functional/pass-as-file\.sh$''
-            ''^tests/functional/path-from-hash-part\.sh$''
-            ''^tests/functional/path-info\.sh$''
-            ''^tests/functional/placeholders\.sh$''
-            ''^tests/functional/plugins\.sh$''
-            ''^tests/functional/post-hook\.sh$''
-            ''^tests/functional/pure-eval\.sh$''
-            ''^tests/functional/push-to-store-old\.sh$''
-            ''^tests/functional/push-to-store\.sh$''
-            ''^tests/functional/read-only-store\.sh$''
-            ''^tests/functional/readfile-context\.sh$''
-            ''^tests/functional/recursive\.sh$''
-            ''^tests/functional/referrers\.sh$''
-            ''^tests/functional/remote-store\.sh$''
-            ''^tests/functional/repair\.sh$''
-            ''^tests/functional/restricted\.sh$''
-            ''^tests/functional/search\.sh$''
-            ''^tests/functional/secure-drv-outputs\.sh$''
-            ''^tests/functional/selfref-gc\.sh$''
-            ''^tests/functional/shell\.sh$''
-            ''^tests/functional/shell\.shebang\.sh$''
-            ''^tests/functional/simple\.builder\.sh$''
-            ''^tests/functional/supplementary-groups\.sh$''
-            ''^tests/functional/toString-path\.sh$''
-            ''^tests/functional/user-envs-migration\.sh$''
-            ''^tests/functional/user-envs-test-case\.sh$''
-            ''^tests/functional/user-envs\.builder\.sh$''
-            ''^tests/functional/user-envs\.sh$''
-            ''^tests/functional/why-depends\.sh$''
-            ''^tests/functional/zstd\.sh$''
+            ''^src/nix-functional-tests/build\.sh$''
+            ''^src/nix-functional-tests/ca/build-dry\.sh$''
+            ''^src/nix-functional-tests/ca/build-with-garbage-path\.sh$''
+            ''^src/nix-functional-tests/ca/common\.sh$''
+            ''^src/nix-functional-tests/ca/concurrent-builds\.sh$''
+            ''^src/nix-functional-tests/ca/eval-store\.sh$''
+            ''^src/nix-functional-tests/ca/gc\.sh$''
+            ''^src/nix-functional-tests/ca/import-from-derivation\.sh$''
+            ''^src/nix-functional-tests/ca/new-build-cmd\.sh$''
+            ''^src/nix-functional-tests/ca/nix-shell\.sh$''
+            ''^src/nix-functional-tests/ca/post-hook\.sh$''
+            ''^src/nix-functional-tests/ca/recursive\.sh$''
+            ''^src/nix-functional-tests/ca/repl\.sh$''
+            ''^src/nix-functional-tests/ca/selfref-gc\.sh$''
+            ''^src/nix-functional-tests/ca/why-depends\.sh$''
+            ''^src/nix-functional-tests/characterisation-test-infra\.sh$''
+            ''^src/nix-functional-tests/check\.sh$''
+            ''^src/nix-functional-tests/common/vars-and-functions\.sh$''
+            ''^src/nix-functional-tests/completions\.sh$''
+            ''^src/nix-functional-tests/compute-levels\.sh$''
+            ''^src/nix-functional-tests/config\.sh$''
+            ''^src/nix-functional-tests/db-migration\.sh$''
+            ''^src/nix-functional-tests/debugger\.sh$''
+            ''^src/nix-functional-tests/dependencies\.builder0\.sh$''
+            ''^src/nix-functional-tests/dependencies\.sh$''
+            ''^src/nix-functional-tests/dump-db\.sh$''
+            ''^src/nix-functional-tests/dyn-drv/build-built-drv\.sh$''
+            ''^src/nix-functional-tests/dyn-drv/common\.sh$''
+            ''^src/nix-functional-tests/dyn-drv/dep-built-drv\.sh$''
+            ''^src/nix-functional-tests/dyn-drv/eval-outputOf\.sh$''
+            ''^src/nix-functional-tests/dyn-drv/old-daemon-error-hack\.sh$''
+            ''^src/nix-functional-tests/dyn-drv/recursive-mod-json\.sh$''
+            ''^src/nix-functional-tests/eval-store\.sh$''
+            ''^src/nix-functional-tests/eval\.sh$''
+            ''^src/nix-functional-tests/export-graph\.sh$''
+            ''^src/nix-functional-tests/export\.sh$''
+            ''^src/nix-functional-tests/extra-sandbox-profile\.sh$''
+            ''^src/nix-functional-tests/fetchClosure\.sh$''
+            ''^src/nix-functional-tests/fetchGit\.sh$''
+            ''^src/nix-functional-tests/fetchGitRefs\.sh$''
+            ''^src/nix-functional-tests/fetchGitSubmodules\.sh$''
+            ''^src/nix-functional-tests/fetchGitVerification\.sh$''
+            ''^src/nix-functional-tests/fetchMercurial\.sh$''
+            ''^src/nix-functional-tests/fetchurl\.sh$''
+            ''^src/nix-functional-tests/fixed\.builder1\.sh$''
+            ''^src/nix-functional-tests/fixed\.builder2\.sh$''
+            ''^src/nix-functional-tests/fixed\.sh$''
+            ''^src/nix-functional-tests/flakes/absolute-paths\.sh$''
+            ''^src/nix-functional-tests/flakes/check\.sh$''
+            ''^src/nix-functional-tests/flakes/common\.sh$''
+            ''^src/nix-functional-tests/flakes/config\.sh$''
+            ''^src/nix-functional-tests/flakes/develop\.sh$''
+            ''^src/nix-functional-tests/flakes/flakes\.sh$''
+            ''^src/nix-functional-tests/flakes/follow-paths\.sh$''
+            ''^src/nix-functional-tests/flakes/prefetch\.sh$''
+            ''^src/nix-functional-tests/flakes/run\.sh$''
+            ''^src/nix-functional-tests/flakes/show\.sh$''
+            ''^src/nix-functional-tests/fmt\.sh$''
+            ''^src/nix-functional-tests/fmt\.simple\.sh$''
+            ''^src/nix-functional-tests/gc-auto\.sh$''
+            ''^src/nix-functional-tests/gc-concurrent\.builder\.sh$''
+            ''^src/nix-functional-tests/gc-concurrent\.sh$''
+            ''^src/nix-functional-tests/gc-concurrent2\.builder\.sh$''
+            ''^src/nix-functional-tests/gc-non-blocking\.sh$''
+            ''^src/nix-functional-tests/gc\.sh$''
+            ''^src/nix-functional-tests/git-hashing/common\.sh$''
+            ''^src/nix-functional-tests/git-hashing/simple\.sh$''
+            ''^src/nix-functional-tests/hash-convert\.sh$''
+            ''^src/nix-functional-tests/help\.sh$''
+            ''^src/nix-functional-tests/impure-derivations\.sh$''
+            ''^src/nix-functional-tests/impure-env\.sh$''
+            ''^src/nix-functional-tests/impure-eval\.sh$''
+            ''^src/nix-functional-tests/install-darwin\.sh$''
+            ''^src/nix-functional-tests/lang\.sh$''
+            ''^src/nix-functional-tests/legacy-ssh-store\.sh$''
+            ''^src/nix-functional-tests/linux-sandbox\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/add-lower-inner\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/add-lower\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/bad-uris\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/build-inner\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/build\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/check-post-init-inner\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/check-post-init\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/common\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/delete-duplicate-inner\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/delete-duplicate\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/delete-refs-inner\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/delete-refs\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/gc-inner\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/gc\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/optimise-inner\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/optimise\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/redundant-add-inner\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/redundant-add\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/remount\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/stale-file-handle-inner\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/stale-file-handle\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/verify-inner\.sh$''
+            ''^src/nix-functional-tests/local-overlay-store/verify\.sh$''
+            ''^src/nix-functional-tests/logging\.sh$''
+            ''^src/nix-functional-tests/misc\.sh$''
+            ''^src/nix-functional-tests/multiple-outputs\.sh$''
+            ''^src/nix-functional-tests/nar-access\.sh$''
+            ''^src/nix-functional-tests/nested-sandboxing\.sh$''
+            ''^src/nix-functional-tests/nested-sandboxing/command\.sh$''
+            ''^src/nix-functional-tests/nix-build\.sh$''
+            ''^src/nix-functional-tests/nix-channel\.sh$''
+            ''^src/nix-functional-tests/nix-collect-garbage-d\.sh$''
+            ''^src/nix-functional-tests/nix-copy-ssh-common\.sh$''
+            ''^src/nix-functional-tests/nix-copy-ssh-ng\.sh$''
+            ''^src/nix-functional-tests/nix-copy-ssh\.sh$''
+            ''^src/nix-functional-tests/nix-daemon-untrusting\.sh$''
+            ''^src/nix-functional-tests/nix-profile\.sh$''
+            ''^src/nix-functional-tests/nix-shell\.sh$''
+            ''^src/nix-functional-tests/nix_path\.sh$''
+            ''^src/nix-functional-tests/optimise-store\.sh$''
+            ''^src/nix-functional-tests/output-normalization\.sh$''
+            ''^src/nix-functional-tests/parallel\.builder\.sh$''
+            ''^src/nix-functional-tests/parallel\.sh$''
+            ''^src/nix-functional-tests/pass-as-file\.sh$''
+            ''^src/nix-functional-tests/path-from-hash-part\.sh$''
+            ''^src/nix-functional-tests/path-info\.sh$''
+            ''^src/nix-functional-tests/placeholders\.sh$''
+            ''^src/nix-functional-tests/plugins\.sh$''
+            ''^src/nix-functional-tests/post-hook\.sh$''
+            ''^src/nix-functional-tests/pure-eval\.sh$''
+            ''^src/nix-functional-tests/push-to-store-old\.sh$''
+            ''^src/nix-functional-tests/push-to-store\.sh$''
+            ''^src/nix-functional-tests/read-only-store\.sh$''
+            ''^src/nix-functional-tests/readfile-context\.sh$''
+            ''^src/nix-functional-tests/recursive\.sh$''
+            ''^src/nix-functional-tests/referrers\.sh$''
+            ''^src/nix-functional-tests/remote-store\.sh$''
+            ''^src/nix-functional-tests/repair\.sh$''
+            ''^src/nix-functional-tests/restricted\.sh$''
+            ''^src/nix-functional-tests/search\.sh$''
+            ''^src/nix-functional-tests/secure-drv-outputs\.sh$''
+            ''^src/nix-functional-tests/selfref-gc\.sh$''
+            ''^src/nix-functional-tests/shell\.sh$''
+            ''^src/nix-functional-tests/shell\.shebang\.sh$''
+            ''^src/nix-functional-tests/simple\.builder\.sh$''
+            ''^src/nix-functional-tests/supplementary-groups\.sh$''
+            ''^src/nix-functional-tests/toString-path\.sh$''
+            ''^src/nix-functional-tests/user-envs-migration\.sh$''
+            ''^src/nix-functional-tests/user-envs-test-case\.sh$''
+            ''^src/nix-functional-tests/user-envs\.builder\.sh$''
+            ''^src/nix-functional-tests/user-envs\.sh$''
+            ''^src/nix-functional-tests/why-depends\.sh$''
+            ''^src/nix-functional-tests/zstd\.sh$''
             ''^src/nix-util-tests/data/git/check-data\.sh$''
           ];
         };
diff --git a/mk/common-test.sh b/mk/common-test.sh
index 817422c402d..a4e7505bf33 100644
--- a/mk/common-test.sh
+++ b/mk/common-test.sh
@@ -5,7 +5,7 @@
 
 test_name=$(echo -n "${test?must be defined by caller (test runner)}" | sed \
     -e "s|^src/[^/]*-test/data/||" \
-    -e "s|^tests/functional/||" \
+    -e "s|^src/nix-functional-tests/||" \
     -e "s|\.sh$||" \
     )
 
diff --git a/package.nix b/package.nix
index 00621d47539..0b0567ae452 100644
--- a/package.nix
+++ b/package.nix
@@ -177,7 +177,7 @@ in {
         ] ++ lib.optionals enableManual [
           ./doc/manual
         ] ++ lib.optionals doInstallCheck [
-          ./tests/functional
+          ./src/nix-functional-tests
         ]));
       };
 
diff --git a/src/libstore/gc.cc b/src/libstore/gc.cc
index 73195794a5c..d06c729bab8 100644
--- a/src/libstore/gc.cc
+++ b/src/libstore/gc.cc
@@ -623,7 +623,7 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results)
         roots.insert(root.first);
     }
 
-    /* Synchronisation point for testing, see tests/functional/gc-non-blocking.sh. */
+    /* Synchronisation point for testing, see src/nix-functional-tests/gc-non-blocking.sh. */
     if (auto p = getEnv("_NIX_TEST_GC_SYNC_2"))
         readFile(*p);
 
diff --git a/src/libutil/error.cc b/src/libutil/error.cc
index ccd008c7c33..1777858390f 100644
--- a/src/libutil/error.cc
+++ b/src/libutil/error.cc
@@ -214,7 +214,7 @@ void printSkippedTracesMaybe(
             // - 1 entry of A
             // - (9 duplicate frames omitted)
             //
-            // See: `tests/functional/lang/eval-fail-mutual-recursion.nix`
+            // See: `src/nix-functional-tests/lang/eval-fail-mutual-recursion.nix`
             tracesSeen.clear();
         }
     }
diff --git a/src/libutil/url-parts.hh b/src/libutil/url-parts.hh
index 1ddc6a53649..2dee7fc5738 100644
--- a/src/libutil/url-parts.hh
+++ b/src/libutil/url-parts.hh
@@ -32,7 +32,7 @@ extern std::regex refRegex;
 
 /// Instead of defining what a good Git Ref is, we define what a bad Git Ref is
 /// This is because of the definition of a ref in refs.c in https://github.com/git/git
-/// See tests/functional/fetchGitRefs.sh for the full definition
+/// See src/nix-functional-tests/fetchGitRefs.sh for the full definition
 const static std::string badGitRefRegexS = "//|^[./]|/\\.|\\.\\.|[[:cntrl:][:space:]:?^~\[]|\\\\|\\*|\\.lock$|\\.lock/|@\\{|[/.]$|^@$|^$";
 extern std::regex badGitRefRegex;
 
diff --git a/src/nix-functional-tests b/src/nix-functional-tests
deleted file mode 120000
index ed0cdf60bf9..00000000000
--- a/src/nix-functional-tests
+++ /dev/null
@@ -1 +0,0 @@
-../tests/functional
\ No newline at end of file
diff --git a/tests/functional/.version b/src/nix-functional-tests/.version
similarity index 100%
rename from tests/functional/.version
rename to src/nix-functional-tests/.version
diff --git a/tests/functional/add.sh b/src/nix-functional-tests/add.sh
similarity index 100%
rename from tests/functional/add.sh
rename to src/nix-functional-tests/add.sh
diff --git a/tests/functional/bash-profile.sh b/src/nix-functional-tests/bash-profile.sh
similarity index 100%
rename from tests/functional/bash-profile.sh
rename to src/nix-functional-tests/bash-profile.sh
diff --git a/tests/functional/big-derivation-attr.nix b/src/nix-functional-tests/big-derivation-attr.nix
similarity index 100%
rename from tests/functional/big-derivation-attr.nix
rename to src/nix-functional-tests/big-derivation-attr.nix
diff --git a/tests/functional/binary-cache-build-remote.sh b/src/nix-functional-tests/binary-cache-build-remote.sh
similarity index 100%
rename from tests/functional/binary-cache-build-remote.sh
rename to src/nix-functional-tests/binary-cache-build-remote.sh
diff --git a/tests/functional/binary-cache.sh b/src/nix-functional-tests/binary-cache.sh
similarity index 100%
rename from tests/functional/binary-cache.sh
rename to src/nix-functional-tests/binary-cache.sh
diff --git a/tests/functional/brotli.sh b/src/nix-functional-tests/brotli.sh
similarity index 100%
rename from tests/functional/brotli.sh
rename to src/nix-functional-tests/brotli.sh
diff --git a/tests/functional/build-delete.sh b/src/nix-functional-tests/build-delete.sh
similarity index 100%
rename from tests/functional/build-delete.sh
rename to src/nix-functional-tests/build-delete.sh
diff --git a/tests/functional/build-dry.sh b/src/nix-functional-tests/build-dry.sh
similarity index 100%
rename from tests/functional/build-dry.sh
rename to src/nix-functional-tests/build-dry.sh
diff --git a/tests/functional/build-hook-ca-fixed.nix b/src/nix-functional-tests/build-hook-ca-fixed.nix
similarity index 100%
rename from tests/functional/build-hook-ca-fixed.nix
rename to src/nix-functional-tests/build-hook-ca-fixed.nix
diff --git a/tests/functional/build-hook-ca-floating.nix b/src/nix-functional-tests/build-hook-ca-floating.nix
similarity index 100%
rename from tests/functional/build-hook-ca-floating.nix
rename to src/nix-functional-tests/build-hook-ca-floating.nix
diff --git a/tests/functional/build-hook.nix b/src/nix-functional-tests/build-hook.nix
similarity index 100%
rename from tests/functional/build-hook.nix
rename to src/nix-functional-tests/build-hook.nix
diff --git a/tests/functional/build-remote-content-addressed-fixed.sh b/src/nix-functional-tests/build-remote-content-addressed-fixed.sh
similarity index 100%
rename from tests/functional/build-remote-content-addressed-fixed.sh
rename to src/nix-functional-tests/build-remote-content-addressed-fixed.sh
diff --git a/tests/functional/build-remote-content-addressed-floating.sh b/src/nix-functional-tests/build-remote-content-addressed-floating.sh
similarity index 100%
rename from tests/functional/build-remote-content-addressed-floating.sh
rename to src/nix-functional-tests/build-remote-content-addressed-floating.sh
diff --git a/tests/functional/build-remote-input-addressed.sh b/src/nix-functional-tests/build-remote-input-addressed.sh
similarity index 100%
rename from tests/functional/build-remote-input-addressed.sh
rename to src/nix-functional-tests/build-remote-input-addressed.sh
diff --git a/tests/functional/build-remote-trustless-after.sh b/src/nix-functional-tests/build-remote-trustless-after.sh
similarity index 100%
rename from tests/functional/build-remote-trustless-after.sh
rename to src/nix-functional-tests/build-remote-trustless-after.sh
diff --git a/tests/functional/build-remote-trustless-should-fail-0.sh b/src/nix-functional-tests/build-remote-trustless-should-fail-0.sh
similarity index 100%
rename from tests/functional/build-remote-trustless-should-fail-0.sh
rename to src/nix-functional-tests/build-remote-trustless-should-fail-0.sh
diff --git a/tests/functional/build-remote-trustless-should-pass-0.sh b/src/nix-functional-tests/build-remote-trustless-should-pass-0.sh
similarity index 100%
rename from tests/functional/build-remote-trustless-should-pass-0.sh
rename to src/nix-functional-tests/build-remote-trustless-should-pass-0.sh
diff --git a/tests/functional/build-remote-trustless-should-pass-1.sh b/src/nix-functional-tests/build-remote-trustless-should-pass-1.sh
similarity index 100%
rename from tests/functional/build-remote-trustless-should-pass-1.sh
rename to src/nix-functional-tests/build-remote-trustless-should-pass-1.sh
diff --git a/tests/functional/build-remote-trustless-should-pass-2.sh b/src/nix-functional-tests/build-remote-trustless-should-pass-2.sh
similarity index 100%
rename from tests/functional/build-remote-trustless-should-pass-2.sh
rename to src/nix-functional-tests/build-remote-trustless-should-pass-2.sh
diff --git a/tests/functional/build-remote-trustless-should-pass-3.sh b/src/nix-functional-tests/build-remote-trustless-should-pass-3.sh
similarity index 100%
rename from tests/functional/build-remote-trustless-should-pass-3.sh
rename to src/nix-functional-tests/build-remote-trustless-should-pass-3.sh
diff --git a/tests/functional/build-remote-trustless.sh b/src/nix-functional-tests/build-remote-trustless.sh
similarity index 86%
rename from tests/functional/build-remote-trustless.sh
rename to src/nix-functional-tests/build-remote-trustless.sh
index c498d46c301..20b59c4dc19 100644
--- a/tests/functional/build-remote-trustless.sh
+++ b/src/nix-functional-tests/build-remote-trustless.sh
@@ -12,7 +12,7 @@ unset NIX_STATE_DIR
 
 remoteDir=$TEST_ROOT/remote
 
-# Note: ssh{-ng}://localhost bypasses ssh. See tests/functional/build-remote.sh for
+# Note: ssh{-ng}://localhost bypasses ssh. See src/nix-functional-tests/build-remote.sh for
 # more details.
 nix-build "$file" -o "$TEST_ROOT/result" --max-jobs 0 \
   --arg busybox "$busybox" \
diff --git a/tests/functional/build-remote-with-mounted-ssh-ng.sh b/src/nix-functional-tests/build-remote-with-mounted-ssh-ng.sh
similarity index 100%
rename from tests/functional/build-remote-with-mounted-ssh-ng.sh
rename to src/nix-functional-tests/build-remote-with-mounted-ssh-ng.sh
diff --git a/tests/functional/build-remote.sh b/src/nix-functional-tests/build-remote.sh
similarity index 100%
rename from tests/functional/build-remote.sh
rename to src/nix-functional-tests/build-remote.sh
diff --git a/tests/functional/build.sh b/src/nix-functional-tests/build.sh
similarity index 100%
rename from tests/functional/build.sh
rename to src/nix-functional-tests/build.sh
diff --git a/tests/functional/ca-shell.nix b/src/nix-functional-tests/ca-shell.nix
similarity index 100%
rename from tests/functional/ca-shell.nix
rename to src/nix-functional-tests/ca-shell.nix
diff --git a/tests/functional/ca/build-cache.sh b/src/nix-functional-tests/ca/build-cache.sh
similarity index 100%
rename from tests/functional/ca/build-cache.sh
rename to src/nix-functional-tests/ca/build-cache.sh
diff --git a/tests/functional/ca/build-dry.sh b/src/nix-functional-tests/ca/build-dry.sh
similarity index 100%
rename from tests/functional/ca/build-dry.sh
rename to src/nix-functional-tests/ca/build-dry.sh
diff --git a/tests/functional/ca/build-with-garbage-path.sh b/src/nix-functional-tests/ca/build-with-garbage-path.sh
similarity index 100%
rename from tests/functional/ca/build-with-garbage-path.sh
rename to src/nix-functional-tests/ca/build-with-garbage-path.sh
diff --git a/tests/functional/ca/build.sh b/src/nix-functional-tests/ca/build.sh
similarity index 100%
rename from tests/functional/ca/build.sh
rename to src/nix-functional-tests/ca/build.sh
diff --git a/tests/functional/ca/common.sh b/src/nix-functional-tests/ca/common.sh
similarity index 100%
rename from tests/functional/ca/common.sh
rename to src/nix-functional-tests/ca/common.sh
diff --git a/tests/functional/ca/concurrent-builds.sh b/src/nix-functional-tests/ca/concurrent-builds.sh
similarity index 100%
rename from tests/functional/ca/concurrent-builds.sh
rename to src/nix-functional-tests/ca/concurrent-builds.sh
diff --git a/tests/functional/ca/config.nix.in b/src/nix-functional-tests/ca/config.nix.in
similarity index 100%
rename from tests/functional/ca/config.nix.in
rename to src/nix-functional-tests/ca/config.nix.in
diff --git a/tests/functional/ca/content-addressed.nix b/src/nix-functional-tests/ca/content-addressed.nix
similarity index 100%
rename from tests/functional/ca/content-addressed.nix
rename to src/nix-functional-tests/ca/content-addressed.nix
diff --git a/tests/functional/ca/derivation-json.sh b/src/nix-functional-tests/ca/derivation-json.sh
similarity index 100%
rename from tests/functional/ca/derivation-json.sh
rename to src/nix-functional-tests/ca/derivation-json.sh
diff --git a/tests/functional/ca/duplicate-realisation-in-closure.sh b/src/nix-functional-tests/ca/duplicate-realisation-in-closure.sh
similarity index 100%
rename from tests/functional/ca/duplicate-realisation-in-closure.sh
rename to src/nix-functional-tests/ca/duplicate-realisation-in-closure.sh
diff --git a/tests/functional/ca/eval-store.sh b/src/nix-functional-tests/ca/eval-store.sh
similarity index 100%
rename from tests/functional/ca/eval-store.sh
rename to src/nix-functional-tests/ca/eval-store.sh
diff --git a/tests/functional/ca/flake.nix b/src/nix-functional-tests/ca/flake.nix
similarity index 100%
rename from tests/functional/ca/flake.nix
rename to src/nix-functional-tests/ca/flake.nix
diff --git a/tests/functional/ca/gc.sh b/src/nix-functional-tests/ca/gc.sh
similarity index 100%
rename from tests/functional/ca/gc.sh
rename to src/nix-functional-tests/ca/gc.sh
diff --git a/tests/functional/ca/import-from-derivation.sh b/src/nix-functional-tests/ca/import-from-derivation.sh
similarity index 100%
rename from tests/functional/ca/import-from-derivation.sh
rename to src/nix-functional-tests/ca/import-from-derivation.sh
diff --git a/tests/functional/ca/local.mk b/src/nix-functional-tests/ca/local.mk
similarity index 93%
rename from tests/functional/ca/local.mk
rename to src/nix-functional-tests/ca/local.mk
index 7c2fcc451ac..7a668e6d70c 100644
--- a/tests/functional/ca/local.mk
+++ b/src/nix-functional-tests/ca/local.mk
@@ -26,4 +26,4 @@ clean-files += \
   $(d)/config.nix
 
 test-deps += \
-  tests/functional/ca/config.nix
+  src/nix-functional-tests/ca/config.nix
diff --git a/tests/functional/ca/meson.build b/src/nix-functional-tests/ca/meson.build
similarity index 100%
rename from tests/functional/ca/meson.build
rename to src/nix-functional-tests/ca/meson.build
diff --git a/tests/functional/ca/new-build-cmd.sh b/src/nix-functional-tests/ca/new-build-cmd.sh
similarity index 100%
rename from tests/functional/ca/new-build-cmd.sh
rename to src/nix-functional-tests/ca/new-build-cmd.sh
diff --git a/tests/functional/ca/nix-copy.sh b/src/nix-functional-tests/ca/nix-copy.sh
similarity index 100%
rename from tests/functional/ca/nix-copy.sh
rename to src/nix-functional-tests/ca/nix-copy.sh
diff --git a/tests/functional/ca/nix-run.sh b/src/nix-functional-tests/ca/nix-run.sh
similarity index 100%
rename from tests/functional/ca/nix-run.sh
rename to src/nix-functional-tests/ca/nix-run.sh
diff --git a/tests/functional/ca/nix-shell.sh b/src/nix-functional-tests/ca/nix-shell.sh
similarity index 100%
rename from tests/functional/ca/nix-shell.sh
rename to src/nix-functional-tests/ca/nix-shell.sh
diff --git a/tests/functional/ca/nondeterministic.nix b/src/nix-functional-tests/ca/nondeterministic.nix
similarity index 100%
rename from tests/functional/ca/nondeterministic.nix
rename to src/nix-functional-tests/ca/nondeterministic.nix
diff --git a/tests/functional/ca/post-hook.sh b/src/nix-functional-tests/ca/post-hook.sh
similarity index 100%
rename from tests/functional/ca/post-hook.sh
rename to src/nix-functional-tests/ca/post-hook.sh
diff --git a/tests/functional/ca/racy.nix b/src/nix-functional-tests/ca/racy.nix
similarity index 100%
rename from tests/functional/ca/racy.nix
rename to src/nix-functional-tests/ca/racy.nix
diff --git a/tests/functional/ca/recursive.sh b/src/nix-functional-tests/ca/recursive.sh
similarity index 100%
rename from tests/functional/ca/recursive.sh
rename to src/nix-functional-tests/ca/recursive.sh
diff --git a/tests/functional/ca/repl.sh b/src/nix-functional-tests/ca/repl.sh
similarity index 100%
rename from tests/functional/ca/repl.sh
rename to src/nix-functional-tests/ca/repl.sh
diff --git a/tests/functional/ca/selfref-gc.sh b/src/nix-functional-tests/ca/selfref-gc.sh
similarity index 100%
rename from tests/functional/ca/selfref-gc.sh
rename to src/nix-functional-tests/ca/selfref-gc.sh
diff --git a/tests/functional/ca/signatures.sh b/src/nix-functional-tests/ca/signatures.sh
similarity index 100%
rename from tests/functional/ca/signatures.sh
rename to src/nix-functional-tests/ca/signatures.sh
diff --git a/tests/functional/ca/substitute.sh b/src/nix-functional-tests/ca/substitute.sh
similarity index 100%
rename from tests/functional/ca/substitute.sh
rename to src/nix-functional-tests/ca/substitute.sh
diff --git a/tests/functional/ca/why-depends.sh b/src/nix-functional-tests/ca/why-depends.sh
similarity index 100%
rename from tests/functional/ca/why-depends.sh
rename to src/nix-functional-tests/ca/why-depends.sh
diff --git a/tests/functional/case-collision.nar b/src/nix-functional-tests/case-collision.nar
similarity index 100%
rename from tests/functional/case-collision.nar
rename to src/nix-functional-tests/case-collision.nar
diff --git a/tests/functional/case.nar b/src/nix-functional-tests/case.nar
similarity index 100%
rename from tests/functional/case.nar
rename to src/nix-functional-tests/case.nar
diff --git a/tests/functional/characterisation-test-infra.sh b/src/nix-functional-tests/characterisation-test-infra.sh
similarity index 100%
rename from tests/functional/characterisation-test-infra.sh
rename to src/nix-functional-tests/characterisation-test-infra.sh
diff --git a/tests/functional/characterisation/empty b/src/nix-functional-tests/characterisation/empty
similarity index 100%
rename from tests/functional/characterisation/empty
rename to src/nix-functional-tests/characterisation/empty
diff --git a/tests/functional/characterisation/framework.sh b/src/nix-functional-tests/characterisation/framework.sh
similarity index 96%
rename from tests/functional/characterisation/framework.sh
rename to src/nix-functional-tests/characterisation/framework.sh
index 5ca125ab5bc..94ce8ea450c 100644
--- a/tests/functional/characterisation/framework.sh
+++ b/src/nix-functional-tests/characterisation/framework.sh
@@ -63,7 +63,7 @@ function characterisationTestExit() {
             echo ''
             echo 'You can rerun this test with:'
             echo ''
-            echo "    _NIX_TEST_ACCEPT=1 make tests/functional/${TEST_NAME}.sh.test"
+            echo "    _NIX_TEST_ACCEPT=1 make src/nix-functional-tests/${TEST_NAME}.sh.test"
             echo ''
             echo 'to regenerate the files containing the expected output,'
             echo 'and then view the git diff to decide whether a change is'
diff --git a/tests/functional/check-refs.nix b/src/nix-functional-tests/check-refs.nix
similarity index 100%
rename from tests/functional/check-refs.nix
rename to src/nix-functional-tests/check-refs.nix
diff --git a/tests/functional/check-refs.sh b/src/nix-functional-tests/check-refs.sh
similarity index 100%
rename from tests/functional/check-refs.sh
rename to src/nix-functional-tests/check-refs.sh
diff --git a/tests/functional/check-reqs.nix b/src/nix-functional-tests/check-reqs.nix
similarity index 100%
rename from tests/functional/check-reqs.nix
rename to src/nix-functional-tests/check-reqs.nix
diff --git a/tests/functional/check-reqs.sh b/src/nix-functional-tests/check-reqs.sh
similarity index 100%
rename from tests/functional/check-reqs.sh
rename to src/nix-functional-tests/check-reqs.sh
diff --git a/tests/functional/check.nix b/src/nix-functional-tests/check.nix
similarity index 100%
rename from tests/functional/check.nix
rename to src/nix-functional-tests/check.nix
diff --git a/tests/functional/check.sh b/src/nix-functional-tests/check.sh
similarity index 100%
rename from tests/functional/check.sh
rename to src/nix-functional-tests/check.sh
diff --git a/tests/functional/chroot-store.sh b/src/nix-functional-tests/chroot-store.sh
similarity index 100%
rename from tests/functional/chroot-store.sh
rename to src/nix-functional-tests/chroot-store.sh
diff --git a/tests/functional/common.sh b/src/nix-functional-tests/common.sh
similarity index 100%
rename from tests/functional/common.sh
rename to src/nix-functional-tests/common.sh
diff --git a/tests/functional/common/functions.sh b/src/nix-functional-tests/common/functions.sh
similarity index 100%
rename from tests/functional/common/functions.sh
rename to src/nix-functional-tests/common/functions.sh
diff --git a/tests/functional/common/init.sh b/src/nix-functional-tests/common/init.sh
similarity index 100%
rename from tests/functional/common/init.sh
rename to src/nix-functional-tests/common/init.sh
diff --git a/tests/functional/common/meson.build b/src/nix-functional-tests/common/meson.build
similarity index 100%
rename from tests/functional/common/meson.build
rename to src/nix-functional-tests/common/meson.build
diff --git a/tests/functional/common/paths.sh b/src/nix-functional-tests/common/paths.sh
similarity index 100%
rename from tests/functional/common/paths.sh
rename to src/nix-functional-tests/common/paths.sh
diff --git a/tests/functional/common/subst-vars.sh.in b/src/nix-functional-tests/common/subst-vars.sh.in
similarity index 100%
rename from tests/functional/common/subst-vars.sh.in
rename to src/nix-functional-tests/common/subst-vars.sh.in
diff --git a/tests/functional/common/test-root.sh b/src/nix-functional-tests/common/test-root.sh
similarity index 100%
rename from tests/functional/common/test-root.sh
rename to src/nix-functional-tests/common/test-root.sh
diff --git a/tests/functional/common/vars.sh b/src/nix-functional-tests/common/vars.sh
similarity index 100%
rename from tests/functional/common/vars.sh
rename to src/nix-functional-tests/common/vars.sh
diff --git a/tests/functional/completions.sh b/src/nix-functional-tests/completions.sh
similarity index 100%
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diff --git a/tests/functional/linux-sandbox.sh b/src/nix-functional-tests/linux-sandbox.sh
similarity index 100%
rename from tests/functional/linux-sandbox.sh
rename to src/nix-functional-tests/linux-sandbox.sh
diff --git a/tests/functional/local-overlay-store/add-lower-inner.sh b/src/nix-functional-tests/local-overlay-store/add-lower-inner.sh
similarity index 100%
rename from tests/functional/local-overlay-store/add-lower-inner.sh
rename to src/nix-functional-tests/local-overlay-store/add-lower-inner.sh
diff --git a/tests/functional/local-overlay-store/add-lower.sh b/src/nix-functional-tests/local-overlay-store/add-lower.sh
similarity index 100%
rename from tests/functional/local-overlay-store/add-lower.sh
rename to src/nix-functional-tests/local-overlay-store/add-lower.sh
diff --git a/tests/functional/local-overlay-store/bad-uris.sh b/src/nix-functional-tests/local-overlay-store/bad-uris.sh
similarity index 100%
rename from tests/functional/local-overlay-store/bad-uris.sh
rename to src/nix-functional-tests/local-overlay-store/bad-uris.sh
diff --git a/tests/functional/local-overlay-store/build-inner.sh b/src/nix-functional-tests/local-overlay-store/build-inner.sh
similarity index 100%
rename from tests/functional/local-overlay-store/build-inner.sh
rename to src/nix-functional-tests/local-overlay-store/build-inner.sh
diff --git a/tests/functional/local-overlay-store/build.sh b/src/nix-functional-tests/local-overlay-store/build.sh
similarity index 100%
rename from tests/functional/local-overlay-store/build.sh
rename to src/nix-functional-tests/local-overlay-store/build.sh
diff --git a/tests/functional/local-overlay-store/check-post-init-inner.sh b/src/nix-functional-tests/local-overlay-store/check-post-init-inner.sh
similarity index 100%
rename from tests/functional/local-overlay-store/check-post-init-inner.sh
rename to src/nix-functional-tests/local-overlay-store/check-post-init-inner.sh
diff --git a/tests/functional/local-overlay-store/check-post-init.sh b/src/nix-functional-tests/local-overlay-store/check-post-init.sh
similarity index 100%
rename from tests/functional/local-overlay-store/check-post-init.sh
rename to src/nix-functional-tests/local-overlay-store/check-post-init.sh
diff --git a/tests/functional/local-overlay-store/common.sh b/src/nix-functional-tests/local-overlay-store/common.sh
similarity index 100%
rename from tests/functional/local-overlay-store/common.sh
rename to src/nix-functional-tests/local-overlay-store/common.sh
diff --git a/tests/functional/local-overlay-store/delete-duplicate-inner.sh b/src/nix-functional-tests/local-overlay-store/delete-duplicate-inner.sh
similarity index 100%
rename from tests/functional/local-overlay-store/delete-duplicate-inner.sh
rename to src/nix-functional-tests/local-overlay-store/delete-duplicate-inner.sh
diff --git a/tests/functional/local-overlay-store/delete-duplicate.sh b/src/nix-functional-tests/local-overlay-store/delete-duplicate.sh
similarity index 100%
rename from tests/functional/local-overlay-store/delete-duplicate.sh
rename to src/nix-functional-tests/local-overlay-store/delete-duplicate.sh
diff --git a/tests/functional/local-overlay-store/delete-refs-inner.sh b/src/nix-functional-tests/local-overlay-store/delete-refs-inner.sh
similarity index 100%
rename from tests/functional/local-overlay-store/delete-refs-inner.sh
rename to src/nix-functional-tests/local-overlay-store/delete-refs-inner.sh
diff --git a/tests/functional/local-overlay-store/delete-refs.sh b/src/nix-functional-tests/local-overlay-store/delete-refs.sh
similarity index 100%
rename from tests/functional/local-overlay-store/delete-refs.sh
rename to src/nix-functional-tests/local-overlay-store/delete-refs.sh
diff --git a/tests/functional/local-overlay-store/gc-inner.sh b/src/nix-functional-tests/local-overlay-store/gc-inner.sh
similarity index 100%
rename from tests/functional/local-overlay-store/gc-inner.sh
rename to src/nix-functional-tests/local-overlay-store/gc-inner.sh
diff --git a/tests/functional/local-overlay-store/gc.sh b/src/nix-functional-tests/local-overlay-store/gc.sh
similarity index 100%
rename from tests/functional/local-overlay-store/gc.sh
rename to src/nix-functional-tests/local-overlay-store/gc.sh
diff --git a/tests/functional/local-overlay-store/local.mk b/src/nix-functional-tests/local-overlay-store/local.mk
similarity index 100%
rename from tests/functional/local-overlay-store/local.mk
rename to src/nix-functional-tests/local-overlay-store/local.mk
diff --git a/tests/functional/local-overlay-store/meson.build b/src/nix-functional-tests/local-overlay-store/meson.build
similarity index 100%
rename from tests/functional/local-overlay-store/meson.build
rename to src/nix-functional-tests/local-overlay-store/meson.build
diff --git a/tests/functional/local-overlay-store/optimise-inner.sh b/src/nix-functional-tests/local-overlay-store/optimise-inner.sh
similarity index 100%
rename from tests/functional/local-overlay-store/optimise-inner.sh
rename to src/nix-functional-tests/local-overlay-store/optimise-inner.sh
diff --git a/tests/functional/local-overlay-store/optimise.sh b/src/nix-functional-tests/local-overlay-store/optimise.sh
similarity index 100%
rename from tests/functional/local-overlay-store/optimise.sh
rename to src/nix-functional-tests/local-overlay-store/optimise.sh
diff --git a/tests/functional/local-overlay-store/redundant-add-inner.sh b/src/nix-functional-tests/local-overlay-store/redundant-add-inner.sh
similarity index 100%
rename from tests/functional/local-overlay-store/redundant-add-inner.sh
rename to src/nix-functional-tests/local-overlay-store/redundant-add-inner.sh
diff --git a/tests/functional/local-overlay-store/redundant-add.sh b/src/nix-functional-tests/local-overlay-store/redundant-add.sh
similarity index 100%
rename from tests/functional/local-overlay-store/redundant-add.sh
rename to src/nix-functional-tests/local-overlay-store/redundant-add.sh
diff --git a/tests/functional/local-overlay-store/remount.sh b/src/nix-functional-tests/local-overlay-store/remount.sh
similarity index 100%
rename from tests/functional/local-overlay-store/remount.sh
rename to src/nix-functional-tests/local-overlay-store/remount.sh
diff --git a/tests/functional/local-overlay-store/stale-file-handle-inner.sh b/src/nix-functional-tests/local-overlay-store/stale-file-handle-inner.sh
similarity index 100%
rename from tests/functional/local-overlay-store/stale-file-handle-inner.sh
rename to src/nix-functional-tests/local-overlay-store/stale-file-handle-inner.sh
diff --git a/tests/functional/local-overlay-store/stale-file-handle.sh b/src/nix-functional-tests/local-overlay-store/stale-file-handle.sh
similarity index 100%
rename from tests/functional/local-overlay-store/stale-file-handle.sh
rename to src/nix-functional-tests/local-overlay-store/stale-file-handle.sh
diff --git a/tests/functional/local-overlay-store/verify-inner.sh b/src/nix-functional-tests/local-overlay-store/verify-inner.sh
similarity index 100%
rename from tests/functional/local-overlay-store/verify-inner.sh
rename to src/nix-functional-tests/local-overlay-store/verify-inner.sh
diff --git a/tests/functional/local-overlay-store/verify.sh b/src/nix-functional-tests/local-overlay-store/verify.sh
similarity index 100%
rename from tests/functional/local-overlay-store/verify.sh
rename to src/nix-functional-tests/local-overlay-store/verify.sh
diff --git a/tests/functional/local.mk b/src/nix-functional-tests/local.mk
similarity index 100%
rename from tests/functional/local.mk
rename to src/nix-functional-tests/local.mk
diff --git a/tests/functional/logging.sh b/src/nix-functional-tests/logging.sh
similarity index 100%
rename from tests/functional/logging.sh
rename to src/nix-functional-tests/logging.sh
diff --git a/tests/functional/meson.build b/src/nix-functional-tests/meson.build
similarity index 98%
rename from tests/functional/meson.build
rename to src/nix-functional-tests/meson.build
index 54f3e7a0158..ab3c938d6f1 100644
--- a/tests/functional/meson.build
+++ b/src/nix-functional-tests/meson.build
@@ -233,7 +233,7 @@ foreach suite : suites
     prefix = fs.relative_to(workdir, meson.project_build_root())
 
     script = script
-    # Turns, e.g., `tests/functional/flakes/show.sh` into a Meson test target called
+    # Turns, e.g., `src/nix-functional-tests/flakes/show.sh` into a Meson test target called
     # `functional-flakes-show`.
     name = fs.replace_suffix(prefix / script, '')
 
diff --git a/tests/functional/misc.sh b/src/nix-functional-tests/misc.sh
similarity index 100%
rename from tests/functional/misc.sh
rename to src/nix-functional-tests/misc.sh
diff --git a/tests/functional/multiple-outputs.nix b/src/nix-functional-tests/multiple-outputs.nix
similarity index 100%
rename from tests/functional/multiple-outputs.nix
rename to src/nix-functional-tests/multiple-outputs.nix
diff --git a/tests/functional/multiple-outputs.sh b/src/nix-functional-tests/multiple-outputs.sh
similarity index 100%
rename from tests/functional/multiple-outputs.sh
rename to src/nix-functional-tests/multiple-outputs.sh
diff --git a/tests/functional/name-after-node.nar b/src/nix-functional-tests/name-after-node.nar
similarity index 100%
rename from tests/functional/name-after-node.nar
rename to src/nix-functional-tests/name-after-node.nar
diff --git a/tests/functional/nar-access.nix b/src/nix-functional-tests/nar-access.nix
similarity index 100%
rename from tests/functional/nar-access.nix
rename to src/nix-functional-tests/nar-access.nix
diff --git a/tests/functional/nar-access.sh b/src/nix-functional-tests/nar-access.sh
similarity index 100%
rename from tests/functional/nar-access.sh
rename to src/nix-functional-tests/nar-access.sh
diff --git a/tests/functional/nars.sh b/src/nix-functional-tests/nars.sh
similarity index 100%
rename from tests/functional/nars.sh
rename to src/nix-functional-tests/nars.sh
diff --git a/tests/functional/nested-sandboxing.sh b/src/nix-functional-tests/nested-sandboxing.sh
similarity index 76%
rename from tests/functional/nested-sandboxing.sh
rename to src/nix-functional-tests/nested-sandboxing.sh
index ae0256de2d6..17e3ecf3e07 100755
--- a/tests/functional/nested-sandboxing.sh
+++ b/src/nix-functional-tests/nested-sandboxing.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 source common.sh
-# This test is run by `tests/functional/nested-sandboxing/runner.nix` in an extra layer of sandboxing.
+# This test is run by `src/nix-functional-tests/nested-sandboxing/runner.nix` in an extra layer of sandboxing.
 [[ -d /nix/store ]] || skipTest "running this test without Nix's deps being drawn from /nix/store is not yet supported"
 
 TODO_NixOS
diff --git a/tests/functional/nested-sandboxing/command.sh b/src/nix-functional-tests/nested-sandboxing/command.sh
similarity index 100%
rename from tests/functional/nested-sandboxing/command.sh
rename to src/nix-functional-tests/nested-sandboxing/command.sh
diff --git a/tests/functional/nested-sandboxing/runner.nix b/src/nix-functional-tests/nested-sandboxing/runner.nix
similarity index 100%
rename from tests/functional/nested-sandboxing/runner.nix
rename to src/nix-functional-tests/nested-sandboxing/runner.nix
diff --git a/tests/functional/nix-build-examples.nix b/src/nix-functional-tests/nix-build-examples.nix
similarity index 100%
rename from tests/functional/nix-build-examples.nix
rename to src/nix-functional-tests/nix-build-examples.nix
diff --git a/tests/functional/nix-build.sh b/src/nix-functional-tests/nix-build.sh
similarity index 100%
rename from tests/functional/nix-build.sh
rename to src/nix-functional-tests/nix-build.sh
diff --git a/tests/functional/nix-channel.sh b/src/nix-functional-tests/nix-channel.sh
similarity index 100%
rename from tests/functional/nix-channel.sh
rename to src/nix-functional-tests/nix-channel.sh
diff --git a/tests/functional/nix-collect-garbage-d.sh b/src/nix-functional-tests/nix-collect-garbage-d.sh
similarity index 100%
rename from tests/functional/nix-collect-garbage-d.sh
rename to src/nix-functional-tests/nix-collect-garbage-d.sh
diff --git a/tests/functional/nix-copy-ssh-common.sh b/src/nix-functional-tests/nix-copy-ssh-common.sh
similarity index 100%
rename from tests/functional/nix-copy-ssh-common.sh
rename to src/nix-functional-tests/nix-copy-ssh-common.sh
diff --git a/tests/functional/nix-copy-ssh-ng.sh b/src/nix-functional-tests/nix-copy-ssh-ng.sh
similarity index 100%
rename from tests/functional/nix-copy-ssh-ng.sh
rename to src/nix-functional-tests/nix-copy-ssh-ng.sh
diff --git a/tests/functional/nix-copy-ssh.sh b/src/nix-functional-tests/nix-copy-ssh.sh
similarity index 100%
rename from tests/functional/nix-copy-ssh.sh
rename to src/nix-functional-tests/nix-copy-ssh.sh
diff --git a/tests/functional/nix-daemon-untrusting.sh b/src/nix-functional-tests/nix-daemon-untrusting.sh
similarity index 100%
rename from tests/functional/nix-daemon-untrusting.sh
rename to src/nix-functional-tests/nix-daemon-untrusting.sh
diff --git a/tests/functional/nix-profile.sh b/src/nix-functional-tests/nix-profile.sh
similarity index 100%
rename from tests/functional/nix-profile.sh
rename to src/nix-functional-tests/nix-profile.sh
diff --git a/tests/functional/nix-shell.sh b/src/nix-functional-tests/nix-shell.sh
similarity index 100%
rename from tests/functional/nix-shell.sh
rename to src/nix-functional-tests/nix-shell.sh
diff --git a/tests/functional/nix_path.sh b/src/nix-functional-tests/nix_path.sh
similarity index 100%
rename from tests/functional/nix_path.sh
rename to src/nix-functional-tests/nix_path.sh
diff --git a/tests/functional/nul.nar b/src/nix-functional-tests/nul.nar
similarity index 100%
rename from tests/functional/nul.nar
rename to src/nix-functional-tests/nul.nar
diff --git a/tests/functional/optimise-store.sh b/src/nix-functional-tests/optimise-store.sh
similarity index 100%
rename from tests/functional/optimise-store.sh
rename to src/nix-functional-tests/optimise-store.sh
diff --git a/tests/functional/output-normalization.sh b/src/nix-functional-tests/output-normalization.sh
similarity index 100%
rename from tests/functional/output-normalization.sh
rename to src/nix-functional-tests/output-normalization.sh
diff --git a/tests/functional/package.nix b/src/nix-functional-tests/package.nix
similarity index 96%
rename from tests/functional/package.nix
rename to src/nix-functional-tests/package.nix
index 21be38c543e..3d1a2d010a1 100644
--- a/tests/functional/package.nix
+++ b/src/nix-functional-tests/package.nix
@@ -43,7 +43,6 @@ mkMesonDerivation (finalAttrs: {
   fileset = fileset.unions [
     ../../scripts/nix-profile.sh.in
     ../../.version
-    ../../tests/functional
     ./.
   ];
 
@@ -87,7 +86,7 @@ mkMesonDerivation (finalAttrs: {
     # not the actual directory directory.
     + ''
       cd $(readlink -e $PWD)
-      echo $PWD | grep tests/functional
+      echo $PWD | grep src/nix-functional-tests
     '';
 
   mesonCheckFlags = [
diff --git a/tests/functional/parallel.builder.sh b/src/nix-functional-tests/parallel.builder.sh
similarity index 100%
rename from tests/functional/parallel.builder.sh
rename to src/nix-functional-tests/parallel.builder.sh
diff --git a/tests/functional/parallel.nix b/src/nix-functional-tests/parallel.nix
similarity index 100%
rename from tests/functional/parallel.nix
rename to src/nix-functional-tests/parallel.nix
diff --git a/tests/functional/parallel.sh b/src/nix-functional-tests/parallel.sh
similarity index 100%
rename from tests/functional/parallel.sh
rename to src/nix-functional-tests/parallel.sh
diff --git a/tests/functional/pass-as-file.sh b/src/nix-functional-tests/pass-as-file.sh
similarity index 100%
rename from tests/functional/pass-as-file.sh
rename to src/nix-functional-tests/pass-as-file.sh
diff --git a/tests/functional/path-from-hash-part.sh b/src/nix-functional-tests/path-from-hash-part.sh
similarity index 100%
rename from tests/functional/path-from-hash-part.sh
rename to src/nix-functional-tests/path-from-hash-part.sh
diff --git a/tests/functional/path-info.sh b/src/nix-functional-tests/path-info.sh
similarity index 100%
rename from tests/functional/path-info.sh
rename to src/nix-functional-tests/path-info.sh
diff --git a/tests/functional/path.nix b/src/nix-functional-tests/path.nix
similarity index 100%
rename from tests/functional/path.nix
rename to src/nix-functional-tests/path.nix
diff --git a/tests/functional/placeholders.sh b/src/nix-functional-tests/placeholders.sh
similarity index 100%
rename from tests/functional/placeholders.sh
rename to src/nix-functional-tests/placeholders.sh
diff --git a/tests/functional/plugins.sh b/src/nix-functional-tests/plugins.sh
similarity index 100%
rename from tests/functional/plugins.sh
rename to src/nix-functional-tests/plugins.sh
diff --git a/tests/functional/plugins/local.mk b/src/nix-functional-tests/plugins/local.mk
similarity index 100%
rename from tests/functional/plugins/local.mk
rename to src/nix-functional-tests/plugins/local.mk
diff --git a/tests/functional/plugins/meson.build b/src/nix-functional-tests/plugins/meson.build
similarity index 100%
rename from tests/functional/plugins/meson.build
rename to src/nix-functional-tests/plugins/meson.build
diff --git a/tests/functional/plugins/plugintest.cc b/src/nix-functional-tests/plugins/plugintest.cc
similarity index 100%
rename from tests/functional/plugins/plugintest.cc
rename to src/nix-functional-tests/plugins/plugintest.cc
diff --git a/tests/functional/post-hook.sh b/src/nix-functional-tests/post-hook.sh
similarity index 100%
rename from tests/functional/post-hook.sh
rename to src/nix-functional-tests/post-hook.sh
diff --git a/tests/functional/pure-eval.nix b/src/nix-functional-tests/pure-eval.nix
similarity index 100%
rename from tests/functional/pure-eval.nix
rename to src/nix-functional-tests/pure-eval.nix
diff --git a/tests/functional/pure-eval.sh b/src/nix-functional-tests/pure-eval.sh
similarity index 100%
rename from tests/functional/pure-eval.sh
rename to src/nix-functional-tests/pure-eval.sh
diff --git a/tests/functional/push-to-store-old.sh b/src/nix-functional-tests/push-to-store-old.sh
similarity index 100%
rename from tests/functional/push-to-store-old.sh
rename to src/nix-functional-tests/push-to-store-old.sh
diff --git a/tests/functional/push-to-store.sh b/src/nix-functional-tests/push-to-store.sh
similarity index 100%
rename from tests/functional/push-to-store.sh
rename to src/nix-functional-tests/push-to-store.sh
diff --git a/tests/functional/read-only-store.sh b/src/nix-functional-tests/read-only-store.sh
similarity index 100%
rename from tests/functional/read-only-store.sh
rename to src/nix-functional-tests/read-only-store.sh
diff --git a/tests/functional/readfile-context.nix b/src/nix-functional-tests/readfile-context.nix
similarity index 100%
rename from tests/functional/readfile-context.nix
rename to src/nix-functional-tests/readfile-context.nix
diff --git a/tests/functional/readfile-context.sh b/src/nix-functional-tests/readfile-context.sh
similarity index 100%
rename from tests/functional/readfile-context.sh
rename to src/nix-functional-tests/readfile-context.sh
diff --git a/tests/functional/recursive.nix b/src/nix-functional-tests/recursive.nix
similarity index 100%
rename from tests/functional/recursive.nix
rename to src/nix-functional-tests/recursive.nix
diff --git a/tests/functional/recursive.sh b/src/nix-functional-tests/recursive.sh
similarity index 100%
rename from tests/functional/recursive.sh
rename to src/nix-functional-tests/recursive.sh
diff --git a/tests/functional/referrers.sh b/src/nix-functional-tests/referrers.sh
similarity index 100%
rename from tests/functional/referrers.sh
rename to src/nix-functional-tests/referrers.sh
diff --git a/tests/functional/remote-store.sh b/src/nix-functional-tests/remote-store.sh
similarity index 100%
rename from tests/functional/remote-store.sh
rename to src/nix-functional-tests/remote-store.sh
diff --git a/tests/functional/repair.sh b/src/nix-functional-tests/repair.sh
similarity index 100%
rename from tests/functional/repair.sh
rename to src/nix-functional-tests/repair.sh
diff --git a/tests/functional/repl.sh b/src/nix-functional-tests/repl.sh
similarity index 98%
rename from tests/functional/repl.sh
rename to src/nix-functional-tests/repl.sh
index 706e0f5dba9..34ab1a23cc2 100755
--- a/tests/functional/repl.sh
+++ b/src/nix-functional-tests/repl.sh
@@ -298,8 +298,8 @@ runRepl () {
     | stripEmptyLinesBeforePrompt \
     | stripFinalPrompt \
     | sed \
-      -e "s@$testDir@/path/to/tests/functional@g" \
-      -e "s@$testDirNoUnderscores@/path/to/tests/functional@g" \
+      -e "s@$testDir@/path/to/src/nix-functional-tests@g" \
+      -e "s@$testDirNoUnderscores@/path/to/src/nix-functional-tests@g" \
       -e "s@$nixVersion@<nix version>@g" \
       -e "s@Added [0-9]* variables@Added <number omitted> variables@g" \
     | grep -vF $'warning: you don\'t have Internet access; disabling some network-dependent features' \
diff --git a/tests/functional/repl/characterisation/empty b/src/nix-functional-tests/repl/characterisation/empty
similarity index 100%
rename from tests/functional/repl/characterisation/empty
rename to src/nix-functional-tests/repl/characterisation/empty
diff --git a/tests/functional/repl/doc-comment-curried-args.expected b/src/nix-functional-tests/repl/doc-comment-curried-args.expected
similarity index 80%
rename from tests/functional/repl/doc-comment-curried-args.expected
rename to src/nix-functional-tests/repl/doc-comment-curried-args.expected
index 56607e911e8..94b029cabbf 100644
--- a/tests/functional/repl/doc-comment-curried-args.expected
+++ b/src/nix-functional-tests/repl/doc-comment-curried-args.expected
@@ -6,7 +6,7 @@ Added <number omitted> variables.
 
 nix-repl> :doc curriedArgs
 Function `curriedArgs`\
-  … defined at /path/to/tests/functional/repl/doc-comments.nix:48:5
+  … defined at /path/to/src/nix-functional-tests/repl/doc-comments.nix:48:5
 
 A documented function.
 
@@ -17,7 +17,7 @@ nix-repl> "Note that users may not expect this to behave as it currently does"
 
 nix-repl> :doc x
 Function `curriedArgs`\
-  … defined at /path/to/tests/functional/repl/doc-comments.nix:50:5
+  … defined at /path/to/src/nix-functional-tests/repl/doc-comments.nix:50:5
 
 The function returned by applying once
 
diff --git a/tests/functional/repl/doc-comment-curried-args.in b/src/nix-functional-tests/repl/doc-comment-curried-args.in
similarity index 100%
rename from tests/functional/repl/doc-comment-curried-args.in
rename to src/nix-functional-tests/repl/doc-comment-curried-args.in
diff --git a/tests/functional/repl/doc-comment-formals.expected b/src/nix-functional-tests/repl/doc-comment-formals.expected
similarity index 76%
rename from tests/functional/repl/doc-comment-formals.expected
rename to src/nix-functional-tests/repl/doc-comment-formals.expected
index 1024919f4b9..56a29495e10 100644
--- a/tests/functional/repl/doc-comment-formals.expected
+++ b/src/nix-functional-tests/repl/doc-comment-formals.expected
@@ -9,6 +9,6 @@ nix-repl> "Note that this is not yet complete"
 
 nix-repl> :doc documentedFormals
 Function `documentedFormals`\
-  … defined at /path/to/tests/functional/repl/doc-comments.nix:57:5
+  … defined at /path/to/src/nix-functional-tests/repl/doc-comments.nix:57:5
 
 Finds x
diff --git a/tests/functional/repl/doc-comment-formals.in b/src/nix-functional-tests/repl/doc-comment-formals.in
similarity index 100%
rename from tests/functional/repl/doc-comment-formals.in
rename to src/nix-functional-tests/repl/doc-comment-formals.in
diff --git a/tests/functional/repl/doc-comment-function.expected b/src/nix-functional-tests/repl/doc-comment-function.expected
similarity index 61%
rename from tests/functional/repl/doc-comment-function.expected
rename to src/nix-functional-tests/repl/doc-comment-function.expected
index 3889c4f7860..0793bb8df7d 100644
--- a/tests/functional/repl/doc-comment-function.expected
+++ b/src/nix-functional-tests/repl/doc-comment-function.expected
@@ -2,6 +2,6 @@ Nix <nix version>
 Type :? for help.
 
 nix-repl> :doc import ./doc-comment-function.nix
-Function defined at /path/to/tests/functional/repl/doc-comment-function.nix:2:1
+Function defined at /path/to/src/nix-functional-tests/repl/doc-comment-function.nix:2:1
 
 A doc comment for a file that only contains a function
diff --git a/tests/functional/repl/doc-comment-function.in b/src/nix-functional-tests/repl/doc-comment-function.in
similarity index 100%
rename from tests/functional/repl/doc-comment-function.in
rename to src/nix-functional-tests/repl/doc-comment-function.in
diff --git a/tests/functional/repl/doc-comment-function.nix b/src/nix-functional-tests/repl/doc-comment-function.nix
similarity index 100%
rename from tests/functional/repl/doc-comment-function.nix
rename to src/nix-functional-tests/repl/doc-comment-function.nix
diff --git a/tests/functional/repl/doc-comments.nix b/src/nix-functional-tests/repl/doc-comments.nix
similarity index 100%
rename from tests/functional/repl/doc-comments.nix
rename to src/nix-functional-tests/repl/doc-comments.nix
diff --git a/tests/functional/repl/doc-compact.expected b/src/nix-functional-tests/repl/doc-compact.expected
similarity index 65%
rename from tests/functional/repl/doc-compact.expected
rename to src/nix-functional-tests/repl/doc-compact.expected
index 79f1fd44f59..4bdd28bc498 100644
--- a/tests/functional/repl/doc-compact.expected
+++ b/src/nix-functional-tests/repl/doc-compact.expected
@@ -6,6 +6,6 @@ Added <number omitted> variables.
 
 nix-repl> :doc compact
 Function `compact`\
-  … defined at /path/to/tests/functional/repl/doc-comments.nix:18:20
+  … defined at /path/to/src/nix-functional-tests/repl/doc-comments.nix:18:20
 
 boom
diff --git a/tests/functional/repl/doc-compact.in b/src/nix-functional-tests/repl/doc-compact.in
similarity index 100%
rename from tests/functional/repl/doc-compact.in
rename to src/nix-functional-tests/repl/doc-compact.in
diff --git a/tests/functional/repl/doc-constant.expected b/src/nix-functional-tests/repl/doc-constant.expected
similarity index 77%
rename from tests/functional/repl/doc-constant.expected
rename to src/nix-functional-tests/repl/doc-constant.expected
index 5787e04dc19..fc79ac57ce1 100644
--- a/tests/functional/repl/doc-constant.expected
+++ b/src/nix-functional-tests/repl/doc-constant.expected
@@ -10,21 +10,21 @@ error: value does not have documentation
 nix-repl> :doc lib.version
 Attribute `version`
 
-  … defined at /path/to/tests/functional/repl/doc-comments.nix:30:3
+  … defined at /path/to/src/nix-functional-tests/repl/doc-comments.nix:30:3
 
 Immovably fixed.
 
 nix-repl> :doc lib.attr.empty
 Attribute `empty`
 
-  … defined at /path/to/tests/functional/repl/doc-comments.nix:33:3
+  … defined at /path/to/src/nix-functional-tests/repl/doc-comments.nix:33:3
 
 Unchangeably constant.
 
 nix-repl> :doc lib.attr.undocument
 error:
        … while evaluating the attribute 'attr.undocument'
-         at /path/to/tests/functional/repl/doc-comments.nix:33:3:
+         at /path/to/src/nix-functional-tests/repl/doc-comments.nix:33:3:
            32|   /** Unchangeably constant. */
            33|   lib.attr.empty = { };
              |   ^
@@ -39,28 +39,28 @@ error:
 nix-repl> :doc (import ./doc-comments.nix).constant
 Attribute `constant`
 
-  … defined at /path/to/tests/functional/repl/doc-comments.nix:27:3
+  … defined at /path/to/src/nix-functional-tests/repl/doc-comments.nix:27:3
 
 Firmly rigid.
 
 nix-repl> :doc (import ./doc-comments.nix).lib.version
 Attribute `version`
 
-  … defined at /path/to/tests/functional/repl/doc-comments.nix:30:3
+  … defined at /path/to/src/nix-functional-tests/repl/doc-comments.nix:30:3
 
 Immovably fixed.
 
 nix-repl> :doc (import ./doc-comments.nix).lib.attr.empty
 Attribute `empty`
 
-  … defined at /path/to/tests/functional/repl/doc-comments.nix:33:3
+  … defined at /path/to/src/nix-functional-tests/repl/doc-comments.nix:33:3
 
 Unchangeably constant.
 
 nix-repl> :doc (import ./doc-comments.nix).lib.attr.undocumented
 Attribute `undocumented`
 
-  … defined at /path/to/tests/functional/repl/doc-comments.nix:35:3
+  … defined at /path/to/src/nix-functional-tests/repl/doc-comments.nix:35:3
 
 No documentation found.
 
@@ -97,7 +97,7 @@ error: attribute 'missing' missing
 nix-repl> :doc lib.attr.undocumental
 error:
        … while evaluating the attribute 'attr.undocumental'
-         at /path/to/tests/functional/repl/doc-comments.nix:33:3:
+         at /path/to/src/nix-functional-tests/repl/doc-comments.nix:33:3:
            32|   /** Unchangeably constant. */
            33|   lib.attr.empty = { };
              |   ^
diff --git a/tests/functional/repl/doc-constant.in b/src/nix-functional-tests/repl/doc-constant.in
similarity index 100%
rename from tests/functional/repl/doc-constant.in
rename to src/nix-functional-tests/repl/doc-constant.in
diff --git a/tests/functional/repl/doc-floatedIn.expected b/src/nix-functional-tests/repl/doc-floatedIn.expected
similarity index 68%
rename from tests/functional/repl/doc-floatedIn.expected
rename to src/nix-functional-tests/repl/doc-floatedIn.expected
index 82bb80b9501..24c6ea5a32a 100644
--- a/tests/functional/repl/doc-floatedIn.expected
+++ b/src/nix-functional-tests/repl/doc-floatedIn.expected
@@ -6,6 +6,6 @@ Added <number omitted> variables.
 
 nix-repl> :doc floatedIn
 Function `floatedIn`\
-  … defined at /path/to/tests/functional/repl/doc-comments.nix:16:5
+  … defined at /path/to/src/nix-functional-tests/repl/doc-comments.nix:16:5
 
 This also works.
diff --git a/tests/functional/repl/doc-floatedIn.in b/src/nix-functional-tests/repl/doc-floatedIn.in
similarity index 100%
rename from tests/functional/repl/doc-floatedIn.in
rename to src/nix-functional-tests/repl/doc-floatedIn.in
diff --git a/tests/functional/repl/doc-functor.expected b/src/nix-functional-tests/repl/doc-functor.expected
similarity index 68%
rename from tests/functional/repl/doc-functor.expected
rename to src/nix-functional-tests/repl/doc-functor.expected
index 8cb2706ef0f..704beaf29d1 100644
--- a/tests/functional/repl/doc-functor.expected
+++ b/src/nix-functional-tests/repl/doc-functor.expected
@@ -6,21 +6,21 @@ Added <number omitted> variables.
 
 nix-repl> :doc multiplier
 Function `__functor`\
-  … defined at /path/to/tests/functional/repl/doc-functor.nix:12:23
+  … defined at /path/to/src/nix-functional-tests/repl/doc-functor.nix:12:23
 
 
 Multiply the argument by the factor stored in the factor attribute.
 
 nix-repl> :doc doubler
 Function `multiply`\
-  … defined at /path/to/tests/functional/repl/doc-functor.nix:5:17
+  … defined at /path/to/src/nix-functional-tests/repl/doc-functor.nix:5:17
 
 
 Look, it's just like a function!
 
 nix-repl> :doc recursive
 Function `__functor`\
-  … defined at /path/to/tests/functional/repl/doc-functor.nix:77:23
+  … defined at /path/to/src/nix-functional-tests/repl/doc-functor.nix:77:23
 
 
 This looks bad, but the docs are ok because of the eta expansion.
@@ -30,14 +30,14 @@ error:
        … while partially calling '__functor' to retrieve documentation
 
        … while calling '__functor'
-         at /path/to/tests/functional/repl/doc-functor.nix:85:17:
+         at /path/to/src/nix-functional-tests/repl/doc-functor.nix:85:17:
            84|      */
            85|     __functor = self: self.__functor self;
              |                 ^
            86|   };
 
        … from call site
-         at /path/to/tests/functional/repl/doc-functor.nix:85:23:
+         at /path/to/src/nix-functional-tests/repl/doc-functor.nix:85:23:
            84|      */
            85|     __functor = self: self.__functor self;
              |                       ^
@@ -46,7 +46,7 @@ error:
        (19999 duplicate frames omitted)
 
        error: stack overflow; max-call-depth exceeded
-       at /path/to/tests/functional/repl/doc-functor.nix:85:23:
+       at /path/to/src/nix-functional-tests/repl/doc-functor.nix:85:23:
            84|      */
            85|     __functor = self: self.__functor self;
              |                       ^
@@ -59,14 +59,14 @@ error:
        (10000 duplicate frames omitted)
 
        … while calling '__functor'
-         at /path/to/tests/functional/repl/doc-functor.nix:97:19:
+         at /path/to/src/nix-functional-tests/repl/doc-functor.nix:97:19:
            96|     f = x: {
            97|       __functor = self: (f (x + 1));
              |                   ^
            98|     };
 
        error: stack overflow; max-call-depth exceeded
-       at /path/to/tests/functional/repl/doc-functor.nix:97:26:
+       at /path/to/src/nix-functional-tests/repl/doc-functor.nix:97:26:
            96|     f = x: {
            97|       __functor = self: (f (x + 1));
              |                          ^
@@ -74,28 +74,28 @@ error:
 
 nix-repl> :doc helper
 Function `square`\
-  … defined at /path/to/tests/functional/repl/doc-functor.nix:36:12
+  … defined at /path/to/src/nix-functional-tests/repl/doc-functor.nix:36:12
 
 
 Compute x^2
 
 nix-repl> :doc helper2
 Function `__functor`\
-  … defined at /path/to/tests/functional/repl/doc-functor.nix:45:23
+  … defined at /path/to/src/nix-functional-tests/repl/doc-functor.nix:45:23
 
 
 This is a function that can be overridden.
 
 nix-repl> :doc lib.helper3
 Function `__functor`\
-  … defined at /path/to/tests/functional/repl/doc-functor.nix:45:23
+  … defined at /path/to/src/nix-functional-tests/repl/doc-functor.nix:45:23
 
 
 This is a function that can be overridden.
 
 nix-repl> :doc helper3
 Function `__functor`\
-  … defined at /path/to/tests/functional/repl/doc-functor.nix:45:23
+  … defined at /path/to/src/nix-functional-tests/repl/doc-functor.nix:45:23
 
 
 This is a function that can be overridden.
diff --git a/tests/functional/repl/doc-functor.in b/src/nix-functional-tests/repl/doc-functor.in
similarity index 100%
rename from tests/functional/repl/doc-functor.in
rename to src/nix-functional-tests/repl/doc-functor.in
diff --git a/tests/functional/repl/doc-functor.nix b/src/nix-functional-tests/repl/doc-functor.nix
similarity index 100%
rename from tests/functional/repl/doc-functor.nix
rename to src/nix-functional-tests/repl/doc-functor.nix
diff --git a/tests/functional/repl/doc-lambda-flavors.expected b/src/nix-functional-tests/repl/doc-lambda-flavors.expected
similarity index 58%
rename from tests/functional/repl/doc-lambda-flavors.expected
rename to src/nix-functional-tests/repl/doc-lambda-flavors.expected
index ab5c956390f..e6d3a03503b 100644
--- a/tests/functional/repl/doc-lambda-flavors.expected
+++ b/src/nix-functional-tests/repl/doc-lambda-flavors.expected
@@ -6,24 +6,24 @@ Added <number omitted> variables.
 
 nix-repl> :doc nonStrict
 Function `nonStrict`\
-  … defined at /path/to/tests/functional/repl/doc-comments.nix:37:70
+  … defined at /path/to/src/nix-functional-tests/repl/doc-comments.nix:37:70
 
 My syntax is not strict, but I'm strict anyway.
 
 nix-repl> :doc strict
 Function `strict`\
-  … defined at /path/to/tests/functional/repl/doc-comments.nix:38:63
+  … defined at /path/to/src/nix-functional-tests/repl/doc-comments.nix:38:63
 
 I don't have to be strict, but I am anyway.
 
 nix-repl> :doc strictPre
 Function `strictPre`\
-  … defined at /path/to/tests/functional/repl/doc-comments.nix:40:48
+  … defined at /path/to/src/nix-functional-tests/repl/doc-comments.nix:40:48
 
 Here's one way to do this
 
 nix-repl> :doc strictPost
 Function `strictPost`\
-  … defined at /path/to/tests/functional/repl/doc-comments.nix:41:53
+  … defined at /path/to/src/nix-functional-tests/repl/doc-comments.nix:41:53
 
 Here's another way to do this
diff --git a/tests/functional/repl/doc-lambda-flavors.in b/src/nix-functional-tests/repl/doc-lambda-flavors.in
similarity index 100%
rename from tests/functional/repl/doc-lambda-flavors.in
rename to src/nix-functional-tests/repl/doc-lambda-flavors.in
diff --git a/tests/functional/repl/doc-measurement.expected b/src/nix-functional-tests/repl/doc-measurement.expected
similarity index 69%
rename from tests/functional/repl/doc-measurement.expected
rename to src/nix-functional-tests/repl/doc-measurement.expected
index 555cac9a2a0..024251c69f4 100644
--- a/tests/functional/repl/doc-measurement.expected
+++ b/src/nix-functional-tests/repl/doc-measurement.expected
@@ -6,6 +6,6 @@ Added <number omitted> variables.
 
 nix-repl> :doc measurement
 Function `measurement`\
-  … defined at /path/to/tests/functional/repl/doc-comments.nix:13:17
+  … defined at /path/to/src/nix-functional-tests/repl/doc-comments.nix:13:17
 
 👈 precisely this wide 👉
diff --git a/tests/functional/repl/doc-measurement.in b/src/nix-functional-tests/repl/doc-measurement.in
similarity index 100%
rename from tests/functional/repl/doc-measurement.in
rename to src/nix-functional-tests/repl/doc-measurement.in
diff --git a/tests/functional/repl/doc-multiply.expected b/src/nix-functional-tests/repl/doc-multiply.expected
similarity index 77%
rename from tests/functional/repl/doc-multiply.expected
rename to src/nix-functional-tests/repl/doc-multiply.expected
index 21523e24c81..c1245f1606d 100644
--- a/tests/functional/repl/doc-multiply.expected
+++ b/src/nix-functional-tests/repl/doc-multiply.expected
@@ -6,7 +6,7 @@ Added <number omitted> variables.
 
 nix-repl> :doc multiply
 Function `multiply`\
-  … defined at /path/to/tests/functional/repl/doc-comments.nix:10:14
+  … defined at /path/to/src/nix-functional-tests/repl/doc-comments.nix:10:14
 
 
 Perform *arithmetic* multiplication. It's kind of like repeated **addition**, very neat.
diff --git a/tests/functional/repl/doc-multiply.in b/src/nix-functional-tests/repl/doc-multiply.in
similarity index 100%
rename from tests/functional/repl/doc-multiply.in
rename to src/nix-functional-tests/repl/doc-multiply.in
diff --git a/tests/functional/repl/doc-unambiguous.expected b/src/nix-functional-tests/repl/doc-unambiguous.expected
similarity index 67%
rename from tests/functional/repl/doc-unambiguous.expected
rename to src/nix-functional-tests/repl/doc-unambiguous.expected
index 0db5505d781..5168470fe8a 100644
--- a/tests/functional/repl/doc-unambiguous.expected
+++ b/src/nix-functional-tests/repl/doc-unambiguous.expected
@@ -6,6 +6,6 @@ Added <number omitted> variables.
 
 nix-repl> :doc unambiguous
 Function `unambiguous`\
-  … defined at /path/to/tests/functional/repl/doc-comments.nix:24:5
+  … defined at /path/to/src/nix-functional-tests/repl/doc-comments.nix:24:5
 
 Very close
diff --git a/tests/functional/repl/doc-unambiguous.in b/src/nix-functional-tests/repl/doc-unambiguous.in
similarity index 100%
rename from tests/functional/repl/doc-unambiguous.in
rename to src/nix-functional-tests/repl/doc-unambiguous.in
diff --git a/tests/functional/repl/pretty-print-idempotent.expected b/src/nix-functional-tests/repl/pretty-print-idempotent.expected
similarity index 100%
rename from tests/functional/repl/pretty-print-idempotent.expected
rename to src/nix-functional-tests/repl/pretty-print-idempotent.expected
diff --git a/tests/functional/repl/pretty-print-idempotent.in b/src/nix-functional-tests/repl/pretty-print-idempotent.in
similarity index 100%
rename from tests/functional/repl/pretty-print-idempotent.in
rename to src/nix-functional-tests/repl/pretty-print-idempotent.in
diff --git a/tests/functional/repl/pretty-print-idempotent.nix b/src/nix-functional-tests/repl/pretty-print-idempotent.nix
similarity index 100%
rename from tests/functional/repl/pretty-print-idempotent.nix
rename to src/nix-functional-tests/repl/pretty-print-idempotent.nix
diff --git a/tests/functional/restricted.nix b/src/nix-functional-tests/restricted.nix
similarity index 100%
rename from tests/functional/restricted.nix
rename to src/nix-functional-tests/restricted.nix
diff --git a/tests/functional/restricted.sh b/src/nix-functional-tests/restricted.sh
similarity index 100%
rename from tests/functional/restricted.sh
rename to src/nix-functional-tests/restricted.sh
diff --git a/tests/functional/search.nix b/src/nix-functional-tests/search.nix
similarity index 100%
rename from tests/functional/search.nix
rename to src/nix-functional-tests/search.nix
diff --git a/tests/functional/search.sh b/src/nix-functional-tests/search.sh
similarity index 100%
rename from tests/functional/search.sh
rename to src/nix-functional-tests/search.sh
diff --git a/tests/functional/secure-drv-outputs.nix b/src/nix-functional-tests/secure-drv-outputs.nix
similarity index 100%
rename from tests/functional/secure-drv-outputs.nix
rename to src/nix-functional-tests/secure-drv-outputs.nix
diff --git a/tests/functional/secure-drv-outputs.sh b/src/nix-functional-tests/secure-drv-outputs.sh
similarity index 100%
rename from tests/functional/secure-drv-outputs.sh
rename to src/nix-functional-tests/secure-drv-outputs.sh
diff --git a/tests/functional/selfref-gc.sh b/src/nix-functional-tests/selfref-gc.sh
similarity index 100%
rename from tests/functional/selfref-gc.sh
rename to src/nix-functional-tests/selfref-gc.sh
diff --git a/tests/functional/shell-hello.nix b/src/nix-functional-tests/shell-hello.nix
similarity index 100%
rename from tests/functional/shell-hello.nix
rename to src/nix-functional-tests/shell-hello.nix
diff --git a/tests/functional/shell.nix b/src/nix-functional-tests/shell.nix
similarity index 100%
rename from tests/functional/shell.nix
rename to src/nix-functional-tests/shell.nix
diff --git a/tests/functional/shell.sh b/src/nix-functional-tests/shell.sh
similarity index 100%
rename from tests/functional/shell.sh
rename to src/nix-functional-tests/shell.sh
diff --git a/tests/functional/shell.shebang.expr b/src/nix-functional-tests/shell.shebang.expr
similarity index 100%
rename from tests/functional/shell.shebang.expr
rename to src/nix-functional-tests/shell.shebang.expr
diff --git a/tests/functional/shell.shebang.legacy.expr b/src/nix-functional-tests/shell.shebang.legacy.expr
similarity index 100%
rename from tests/functional/shell.shebang.legacy.expr
rename to src/nix-functional-tests/shell.shebang.legacy.expr
diff --git a/tests/functional/shell.shebang.nix b/src/nix-functional-tests/shell.shebang.nix
similarity index 100%
rename from tests/functional/shell.shebang.nix
rename to src/nix-functional-tests/shell.shebang.nix
diff --git a/tests/functional/shell.shebang.rb b/src/nix-functional-tests/shell.shebang.rb
similarity index 100%
rename from tests/functional/shell.shebang.rb
rename to src/nix-functional-tests/shell.shebang.rb
diff --git a/tests/functional/shell.shebang.sh b/src/nix-functional-tests/shell.shebang.sh
similarity index 100%
rename from tests/functional/shell.shebang.sh
rename to src/nix-functional-tests/shell.shebang.sh
diff --git a/tests/functional/signing.sh b/src/nix-functional-tests/signing.sh
similarity index 100%
rename from tests/functional/signing.sh
rename to src/nix-functional-tests/signing.sh
diff --git a/tests/functional/simple-failing.nix b/src/nix-functional-tests/simple-failing.nix
similarity index 100%
rename from tests/functional/simple-failing.nix
rename to src/nix-functional-tests/simple-failing.nix
diff --git a/tests/functional/simple.builder.sh b/src/nix-functional-tests/simple.builder.sh
similarity index 100%
rename from tests/functional/simple.builder.sh
rename to src/nix-functional-tests/simple.builder.sh
diff --git a/tests/functional/simple.nix b/src/nix-functional-tests/simple.nix
similarity index 100%
rename from tests/functional/simple.nix
rename to src/nix-functional-tests/simple.nix
diff --git a/tests/functional/simple.sh b/src/nix-functional-tests/simple.sh
similarity index 100%
rename from tests/functional/simple.sh
rename to src/nix-functional-tests/simple.sh
diff --git a/tests/functional/slash.nar b/src/nix-functional-tests/slash.nar
similarity index 100%
rename from tests/functional/slash.nar
rename to src/nix-functional-tests/slash.nar
diff --git a/tests/functional/ssh-relay.sh b/src/nix-functional-tests/ssh-relay.sh
similarity index 100%
rename from tests/functional/ssh-relay.sh
rename to src/nix-functional-tests/ssh-relay.sh
diff --git a/tests/functional/store-info.sh b/src/nix-functional-tests/store-info.sh
similarity index 100%
rename from tests/functional/store-info.sh
rename to src/nix-functional-tests/store-info.sh
diff --git a/tests/functional/structured-attrs-shell.nix b/src/nix-functional-tests/structured-attrs-shell.nix
similarity index 100%
rename from tests/functional/structured-attrs-shell.nix
rename to src/nix-functional-tests/structured-attrs-shell.nix
diff --git a/tests/functional/structured-attrs.nix b/src/nix-functional-tests/structured-attrs.nix
similarity index 100%
rename from tests/functional/structured-attrs.nix
rename to src/nix-functional-tests/structured-attrs.nix
diff --git a/tests/functional/structured-attrs.sh b/src/nix-functional-tests/structured-attrs.sh
similarity index 100%
rename from tests/functional/structured-attrs.sh
rename to src/nix-functional-tests/structured-attrs.sh
diff --git a/tests/functional/substitute-with-invalid-ca.sh b/src/nix-functional-tests/substitute-with-invalid-ca.sh
similarity index 100%
rename from tests/functional/substitute-with-invalid-ca.sh
rename to src/nix-functional-tests/substitute-with-invalid-ca.sh
diff --git a/tests/functional/suggestions.sh b/src/nix-functional-tests/suggestions.sh
similarity index 100%
rename from tests/functional/suggestions.sh
rename to src/nix-functional-tests/suggestions.sh
diff --git a/tests/functional/supplementary-groups.sh b/src/nix-functional-tests/supplementary-groups.sh
similarity index 100%
rename from tests/functional/supplementary-groups.sh
rename to src/nix-functional-tests/supplementary-groups.sh
diff --git a/tests/functional/symlink-derivation.nix b/src/nix-functional-tests/symlink-derivation.nix
similarity index 100%
rename from tests/functional/symlink-derivation.nix
rename to src/nix-functional-tests/symlink-derivation.nix
diff --git a/tests/functional/tarball.sh b/src/nix-functional-tests/tarball.sh
similarity index 100%
rename from tests/functional/tarball.sh
rename to src/nix-functional-tests/tarball.sh
diff --git a/tests/functional/test-infra.sh b/src/nix-functional-tests/test-infra.sh
similarity index 100%
rename from tests/functional/test-infra.sh
rename to src/nix-functional-tests/test-infra.sh
diff --git a/tests/functional/test-libstoreconsumer.sh b/src/nix-functional-tests/test-libstoreconsumer.sh
similarity index 100%
rename from tests/functional/test-libstoreconsumer.sh
rename to src/nix-functional-tests/test-libstoreconsumer.sh
diff --git a/tests/functional/test-libstoreconsumer/README.md b/src/nix-functional-tests/test-libstoreconsumer/README.md
similarity index 100%
rename from tests/functional/test-libstoreconsumer/README.md
rename to src/nix-functional-tests/test-libstoreconsumer/README.md
diff --git a/tests/functional/test-libstoreconsumer/local.mk b/src/nix-functional-tests/test-libstoreconsumer/local.mk
similarity index 100%
rename from tests/functional/test-libstoreconsumer/local.mk
rename to src/nix-functional-tests/test-libstoreconsumer/local.mk
diff --git a/tests/functional/test-libstoreconsumer/main.cc b/src/nix-functional-tests/test-libstoreconsumer/main.cc
similarity index 100%
rename from tests/functional/test-libstoreconsumer/main.cc
rename to src/nix-functional-tests/test-libstoreconsumer/main.cc
diff --git a/tests/functional/test-libstoreconsumer/meson.build b/src/nix-functional-tests/test-libstoreconsumer/meson.build
similarity index 100%
rename from tests/functional/test-libstoreconsumer/meson.build
rename to src/nix-functional-tests/test-libstoreconsumer/meson.build
diff --git a/tests/functional/timeout.nix b/src/nix-functional-tests/timeout.nix
similarity index 100%
rename from tests/functional/timeout.nix
rename to src/nix-functional-tests/timeout.nix
diff --git a/tests/functional/timeout.sh b/src/nix-functional-tests/timeout.sh
similarity index 100%
rename from tests/functional/timeout.sh
rename to src/nix-functional-tests/timeout.sh
diff --git a/tests/functional/toString-path.sh b/src/nix-functional-tests/toString-path.sh
similarity index 100%
rename from tests/functional/toString-path.sh
rename to src/nix-functional-tests/toString-path.sh
diff --git a/tests/functional/tree.tar.gz b/src/nix-functional-tests/tree.tar.gz
similarity index 100%
rename from tests/functional/tree.tar.gz
rename to src/nix-functional-tests/tree.tar.gz
diff --git a/tests/functional/undefined-variable.nix b/src/nix-functional-tests/undefined-variable.nix
similarity index 100%
rename from tests/functional/undefined-variable.nix
rename to src/nix-functional-tests/undefined-variable.nix
diff --git a/tests/functional/unnormalized.nar b/src/nix-functional-tests/unnormalized.nar
similarity index 100%
rename from tests/functional/unnormalized.nar
rename to src/nix-functional-tests/unnormalized.nar
diff --git a/tests/functional/user-envs-migration.sh b/src/nix-functional-tests/user-envs-migration.sh
similarity index 100%
rename from tests/functional/user-envs-migration.sh
rename to src/nix-functional-tests/user-envs-migration.sh
diff --git a/tests/functional/user-envs-test-case.sh b/src/nix-functional-tests/user-envs-test-case.sh
similarity index 100%
rename from tests/functional/user-envs-test-case.sh
rename to src/nix-functional-tests/user-envs-test-case.sh
diff --git a/tests/functional/user-envs.builder.sh b/src/nix-functional-tests/user-envs.builder.sh
similarity index 100%
rename from tests/functional/user-envs.builder.sh
rename to src/nix-functional-tests/user-envs.builder.sh
diff --git a/tests/functional/user-envs.nix b/src/nix-functional-tests/user-envs.nix
similarity index 100%
rename from tests/functional/user-envs.nix
rename to src/nix-functional-tests/user-envs.nix
diff --git a/tests/functional/user-envs.sh b/src/nix-functional-tests/user-envs.sh
similarity index 100%
rename from tests/functional/user-envs.sh
rename to src/nix-functional-tests/user-envs.sh
diff --git a/tests/functional/why-depends.sh b/src/nix-functional-tests/why-depends.sh
similarity index 100%
rename from tests/functional/why-depends.sh
rename to src/nix-functional-tests/why-depends.sh
diff --git a/tests/functional/zstd.sh b/src/nix-functional-tests/zstd.sh
similarity index 100%
rename from tests/functional/zstd.sh
rename to src/nix-functional-tests/zstd.sh
diff --git a/src/nix-store-tests/package.nix b/src/nix-store-tests/package.nix
index 8319488d163..d31ad773dc4 100644
--- a/src/nix-store-tests/package.nix
+++ b/src/nix-store-tests/package.nix
@@ -71,7 +71,7 @@ mkMesonExecutable (finalAttrs: {
           root = ../..;
           fileset = lib.fileset.unions [
             ./data
-            ../../tests/functional/derivation
+            ../nix-functional-tests/derivation
           ];
         };
       in runCommand "${finalAttrs.pname}-run" {
diff --git a/tests/nixos/functional/common.nix b/tests/nixos/functional/common.nix
index 51fd768843a..f1a977943dd 100644
--- a/tests/nixos/functional/common.nix
+++ b/tests/nixos/functional/common.nix
@@ -49,8 +49,8 @@ in
           cd nix
 
           # Tests we don't need
-          echo >tests/functional/plugins/local.mk
-          sed -i tests/functional/local.mk \
+          echo >src/nix-functional-tests/plugins/local.mk
+          sed -i src/nix-functional-tests/local.mk \
             -e 's!nix_tests += plugins\.sh!!' \
             -e 's!nix_tests += test-libstoreconsumer\.sh!!' \
             ;
diff --git a/tests/repl-completion.nix b/tests/repl-completion.nix
index 3ba198a9860..0950c268b2c 100644
--- a/tests/repl-completion.nix
+++ b/tests/repl-completion.nix
@@ -1,7 +1,7 @@
 { runCommand, nix, expect }:
 
 # We only use expect when necessary, e.g. for testing tab completion in nix repl.
-# See also tests/functional/repl.sh
+# See also src/nix-functional-tests/repl.sh
 
 runCommand "repl-completion" {
   nativeBuildInputs = [