diff --git a/lib/src/ast/sass/expression/if.dart b/lib/src/ast/sass/expression/if.dart
index b26a77c46..99f1898c1 100644
--- a/lib/src/ast/sass/expression/if.dart
+++ b/lib/src/ast/sass/expression/if.dart
@@ -6,9 +6,6 @@ import 'package:source_span/source_span.dart';
 
 import '../../../ast/sass.dart';
 import '../../../visitor/interface/expression.dart';
-import '../expression.dart';
-import '../argument_invocation.dart';
-import '../callable_invocation.dart';
 
 /// A ternary expression.
 ///
diff --git a/lib/src/async_import_cache.dart b/lib/src/async_import_cache.dart
index 1eb044c2f..58e5a1b6d 100644
--- a/lib/src/async_import_cache.dart
+++ b/lib/src/async_import_cache.dart
@@ -8,7 +8,6 @@ import 'package:tuple/tuple.dart';
 
 import 'ast/sass.dart';
 import 'importer.dart';
-import 'importer/result.dart';
 import 'importer/utils.dart';
 import 'io.dart';
 import 'logger.dart';
diff --git a/lib/src/callable/built_in.dart b/lib/src/callable/built_in.dart
index 426b601c1..58a9c5818 100644
--- a/lib/src/callable/built_in.dart
+++ b/lib/src/callable/built_in.dart
@@ -7,7 +7,6 @@ import 'package:tuple/tuple.dart';
 import '../ast/sass.dart';
 import '../callable.dart';
 import '../value.dart';
-import 'async_built_in.dart';
 
 typedef _Callback = Value Function(List<Value> arguments);
 
diff --git a/lib/src/functions/color.dart b/lib/src/functions/color.dart
index 5112492b4..1f5e73520 100644
--- a/lib/src/functions/color.dart
+++ b/lib/src/functions/color.dart
@@ -666,10 +666,11 @@ void _checkAngle(SassNumber angle, [String name]) {
 void _checkPercent(SassNumber number, String name) {
   if (number.hasUnit('%')) return;
 
-  warn("\$$name: Passing a number without unit % is deprecated.\n"
+  warn(
+      "\$$name: Passing a number without unit % is deprecated.\n"
       "\n"
       "To preserve current behavior: \$$name${_removeUnits(number)} * 1%",
-       deprecation: true);
+      deprecation: true);
 }
 
 /// Returns the right-hand side of an expression that would remove all units
diff --git a/lib/src/import_cache.dart b/lib/src/import_cache.dart
index 1ac8ad7d5..96c5d628a 100644
--- a/lib/src/import_cache.dart
+++ b/lib/src/import_cache.dart
@@ -5,7 +5,7 @@
 // DO NOT EDIT. This file was generated from async_import_cache.dart.
 // See tool/grind/synchronize.dart for details.
 //
-// Checksum: ac91c195e290010a7e104f832a00a5ebb41a127a
+// Checksum: 6ac1ee07d6b46134f1616d82782180f1cc3b6d81
 //
 // ignore_for_file: unused_import
 
@@ -15,7 +15,6 @@ import 'package:tuple/tuple.dart';
 
 import 'ast/sass.dart';
 import 'importer.dart';
-import 'importer/result.dart';
 import 'importer/utils.dart';
 import 'io.dart';
 import 'logger.dart';
diff --git a/lib/src/importer/filesystem.dart b/lib/src/importer/filesystem.dart
index ef6592318..ac02f7b96 100644
--- a/lib/src/importer/filesystem.dart
+++ b/lib/src/importer/filesystem.dart
@@ -8,7 +8,6 @@ import 'package:path/path.dart' as p;
 import '../importer.dart';
 import '../io.dart' as io;
 import '../syntax.dart';
-import 'result.dart';
 import 'utils.dart';
 
 /// An importer that loads files from a load path on the filesystem.
diff --git a/lib/src/importer/no_op.dart b/lib/src/importer/no_op.dart
index 7868285ae..dde55c060 100644
--- a/lib/src/importer/no_op.dart
+++ b/lib/src/importer/no_op.dart
@@ -3,7 +3,6 @@
 // https://opensource.org/licenses/MIT.
 
 import '../importer.dart';
-import 'result.dart';
 
 /// An importer that never imports any stylesheets.
 ///
diff --git a/lib/src/importer/package.dart b/lib/src/importer/package.dart
index 3897dae20..79eded476 100644
--- a/lib/src/importer/package.dart
+++ b/lib/src/importer/package.dart
@@ -6,8 +6,6 @@ import 'package:meta/meta.dart';
 
 import '../importer.dart';
 import '../sync_package_resolver.dart';
-import 'filesystem.dart';
-import 'result.dart';
 
 /// A filesystem importer to use when resolving the results of `package:` URLs.
 ///
diff --git a/lib/src/parse/stylesheet.dart b/lib/src/parse/stylesheet.dart
index de5613632..134ff11ce 100644
--- a/lib/src/parse/stylesheet.dart
+++ b/lib/src/parse/stylesheet.dart
@@ -19,7 +19,6 @@ import '../logger.dart';
 import '../util/character.dart';
 import '../utils.dart';
 import '../value.dart';
-import '../value/color.dart';
 import 'parser.dart';
 
 /// The base class for both the SCSS and indented syntax parsers.
diff --git a/lib/src/stylesheet_graph.dart b/lib/src/stylesheet_graph.dart
index 5dbb07a2b..02e8f7481 100644
--- a/lib/src/stylesheet_graph.dart
+++ b/lib/src/stylesheet_graph.dart
@@ -2,8 +2,6 @@
 // MIT-style license that can be found in the LICENSE file or at
 // https://opensource.org/licenses/MIT.
 
-import 'dart:collection';
-
 import 'package:collection/collection.dart';
 import 'package:meta/meta.dart';
 import 'package:path/path.dart' as p;
diff --git a/test/dart_api/value/color_test.dart b/test/dart_api/value/color_test.dart
index dba3b7b5f..1fda28a75 100644
--- a/test/dart_api/value/color_test.dart
+++ b/test/dart_api/value/color_test.dart
@@ -250,7 +250,8 @@ void main() {
 
   group("new SassColor.hsl()", () {
     test("allows valid values", () {
-      expect(SassColor.hsl(0, 0, 0, 0), equals(parseValue("hsla(0, 0%, 0%, 0)")));
+      expect(
+          SassColor.hsl(0, 0, 0, 0), equals(parseValue("hsla(0, 0%, 0%, 0)")));
       expect(SassColor.hsl(4320, 100, 100, 1),
           equals(parseValue("hsl(4320, 100%, 100%)")));
     });