diff --git a/planner/cascades/BUILD.bazel b/planner/cascades/BUILD.bazel
index 814ad0ad5e071..a149c3ad1fd01 100644
--- a/planner/cascades/BUILD.bazel
+++ b/planner/cascades/BUILD.bazel
@@ -43,6 +43,7 @@ go_test(
     data = glob(["testdata/**"]),
     embed = [":cascades"],
     flaky = True,
+    shard_count = 5,
     deps = [
         "//domain",
         "//expression",
diff --git a/planner/funcdep/BUILD.bazel b/planner/funcdep/BUILD.bazel
index a732823cbd80a..323fb2c0b8011 100644
--- a/planner/funcdep/BUILD.bazel
+++ b/planner/funcdep/BUILD.bazel
@@ -28,6 +28,7 @@ go_test(
     ],
     embed = [":funcdep"],
     flaky = True,
+    shard_count = 4,
     deps = [
         "//domain",
         "//infoschema",
diff --git a/store/BUILD.bazel b/store/BUILD.bazel
index bf8faa0dde9b9..244f8b8a25980 100644
--- a/store/BUILD.bazel
+++ b/store/BUILD.bazel
@@ -25,6 +25,7 @@ go_test(
     ],
     embed = [":store"],
     flaky = True,
+    shard_count = 23,
     deps = [
         "//domain",
         "//kv",
diff --git a/types/BUILD.bazel b/types/BUILD.bazel
index 454f7972cd071..13d8140953c6f 100644
--- a/types/BUILD.bazel
+++ b/types/BUILD.bazel
@@ -97,6 +97,7 @@ go_test(
     ],
     embed = [":types"],
     flaky = True,
+    shard_count = 50,
     deps = [
         "//parser/charset",
         "//parser/mysql",