diff --git a/dwds/test/instances/common/instance_common.dart b/dwds/test/instances/common/instance_common.dart
index 2d18ba6c3..ce52a4f3c 100644
--- a/dwds/test/instances/common/instance_common.dart
+++ b/dwds/test/instances/common/instance_common.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2023, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
@@ -62,9 +62,7 @@ void runTests({
 
     /// A reference to the the variable `libraryPublicFinal`, an instance of
     /// `MyTestClass`.
-    Future<RemoteObject> libraryPublicFinal(
-      CompilationMode compilationMode,
-    ) =>
+    Future<RemoteObject> libraryPublicFinal(CompilationMode compilationMode) =>
         inspector.jsEvaluate(
           libraryVariableExpression('libraryPublicFinal', compilationMode),
         );
diff --git a/dwds/test/instances/common/instance_inspection_common.dart b/dwds/test/instances/common/instance_inspection_common.dart
index 16e0befd5..2f60ab39c 100644
--- a/dwds/test/instances/common/instance_inspection_common.dart
+++ b/dwds/test/instances/common/instance_inspection_common.dart
@@ -184,12 +184,7 @@ void runTests({
             final instanceRef = await getInstanceRef(frame, 'list');
 
             final instanceId = instanceRef.id!;
-            expect(
-              await getObject(instanceId),
-              matchListInstance(
-                type: canaryFeatures ? 'JSArray<int>' : 'List<int>',
-              ),
-            );
+            expect(await getObject(instanceId), matchListInstance(type: 'int'));
 
             expect(await getFields(instanceRef), [0, 1, 2]);
             expect(await getFields(instanceRef, offset: 1, count: 0), []);
diff --git a/dwds/test/instances/common/patterns_inspection_common.dart b/dwds/test/instances/common/patterns_inspection_common.dart
index 8beffb381..a29dbfaa3 100644
--- a/dwds/test/instances/common/patterns_inspection_common.dart
+++ b/dwds/test/instances/common/patterns_inspection_common.dart
@@ -78,7 +78,7 @@ Future<void> runTests({
         final frame = event.topFrame!;
 
         expect(await getFrameVariables(frame), {
-          'obj': matchListInstance(type: matchListClassName('Object')),
+          'obj': matchListInstance(type: 'Object'),
           'a': matchPrimitiveInstance(kind: InstanceKind.kString, value: 'a'),
           'n': matchPrimitiveInstance(kind: InstanceKind.kDouble, value: 1),
         });
@@ -90,7 +90,7 @@ Future<void> runTests({
         final frame = event.topFrame!;
 
         expect(await getFrameVariables(frame), {
-          'obj': matchListInstance(type: matchListClassName('Object')),
+          'obj': matchListInstance(type: 'Object'),
           'a': matchPrimitiveInstance(kind: InstanceKind.kString, value: 'b'),
           'n': matchPrimitiveInstance(kind: InstanceKind.kDouble, value: 3.14),
         });
@@ -105,7 +105,7 @@ Future<void> runTests({
         expect(await getFields(instanceRef), [0, 1]);
 
         expect(await getFrameVariables(frame), {
-          'obj': matchListInstance(type: matchListClassName('int')),
+          'obj': matchListInstance(type: 'int'),
         });
       });
     });
@@ -153,7 +153,7 @@ Future<void> runTests({
         final vars = await getFrameVariables(frame);
         expect(vars, {
           'dog': matchPrimitiveInstance(kind: 'String', value: 'Prismo'),
-          'cats': matchListInstance(type: matchListClassName('String')),
+          'cats': matchListInstance(type: 'String'),
           'firstCat': matchPrimitiveInstance(kind: 'String', value: 'Garfield'),
           'secondCat': matchPrimitiveInstance(kind: 'String', value: 'Tom'),
         });
diff --git a/dwds/test/instances/common/test_inspector.dart b/dwds/test/instances/common/test_inspector.dart
index 98762495f..3319c9416 100644
--- a/dwds/test/instances/common/test_inspector.dart
+++ b/dwds/test/instances/common/test_inspector.dart
@@ -296,8 +296,10 @@ Matcher matchRecordTypeClassRef = matchClassRef(
 );
 Matcher matchTypeClassRef =
     matchClassRef(name: matchTypeClassName, libraryId: _dartCoreLibrary);
-Matcher matchListClassRef(dynamic type) =>
-    matchClassRef(name: type, libraryId: _matchListLibraryName);
+Matcher matchListClassRef(String type) => matchClassRef(
+      name: matchListClassName(type),
+      libraryId: _matchListLibraryName,
+    );
 Matcher matchMapClassRef(String type) =>
     matchClassRef(name: type, libraryId: _dartJsHelperLibrary);
 Matcher matchSetClassRef(String type) =>
diff --git a/dwds/test/instances/common/type_inspection_common.dart b/dwds/test/instances/common/type_inspection_common.dart
index a7dbacb2c..cc182ae93 100644
--- a/dwds/test/instances/common/type_inspection_common.dart
+++ b/dwds/test/instances/common/type_inspection_common.dart
@@ -17,8 +17,8 @@ void runTests({
   required bool canaryFeatures,
   required bool debug,
 }) {
-  final context =
-      TestContext(TestProject.testExperimentWithSoundNullSafety, provider);
+  final project = TestProject.testExperimentWithSoundNullSafety;
+  final context = TestContext(project, provider);
   final testInspector = TestInspector(context);
 
   late VmServiceInterface service;
@@ -105,7 +105,6 @@ void runTests({
 
         final classId = instanceRef.classRef!.id;
         expect(await getObject(classId), matchTypeClass);
-
         expect(await getFields(instanceRef, depth: 1), matchTypeObject);
         expect(await getDisplayedFields(instanceRef), matchDisplayedTypeObject);
       });
diff --git a/dwds/test/instances/instance_canary_test.dart b/dwds/test/instances/instance_canary_test.dart
index 72f40edb9..f1f7d4159 100644
--- a/dwds/test/instances/instance_canary_test.dart
+++ b/dwds/test/instances/instance_canary_test.dart
@@ -20,7 +20,7 @@ void main() {
   final debug = false;
   final canaryFeatures = true;
 
-  group('canaryFeatures: $canaryFeatures |', () {
+  group('canary: $canaryFeatures |', () {
     final provider = TestSdkConfigurationProvider(
       canaryFeatures: canaryFeatures,
       verbose: debug,
diff --git a/dwds/test/instances/instance_inspection_canary_test.dart b/dwds/test/instances/instance_inspection_canary_test.dart
index 4236e93c7..704e19b28 100644
--- a/dwds/test/instances/instance_inspection_canary_test.dart
+++ b/dwds/test/instances/instance_inspection_canary_test.dart
@@ -18,7 +18,7 @@ void main() {
   final debug = false;
   final canaryFeatures = true;
 
-  group('canaryFeatures: $canaryFeatures |', () {
+  group('canary: $canaryFeatures |', () {
     final provider = TestSdkConfigurationProvider(
       verbose: debug,
       canaryFeatures: canaryFeatures,
@@ -29,6 +29,9 @@ void main() {
       runTests(
         provider: provider,
         compilationMode: compilationMode,
+        // Note: not running with weak null safety because it
+        // requires a special branch of build_web_compilers
+        // that does not support --canary flag.
         nullSafetyMode: NullSafety.sound,
         canaryFeatures: canaryFeatures,
         debug: debug,
diff --git a/dwds/test/instances/instance_inspection_test.dart b/dwds/test/instances/instance_inspection_test.dart
index 546c8c32a..53c5b4022 100644
--- a/dwds/test/instances/instance_inspection_test.dart
+++ b/dwds/test/instances/instance_inspection_test.dart
@@ -18,7 +18,7 @@ void main() {
   final debug = false;
   final canaryFeatures = false;
 
-  group('canaryFeatures: $canaryFeatures |', () {
+  group('canary: $canaryFeatures |', () {
     final provider = TestSdkConfigurationProvider(
       verbose: debug,
       canaryFeatures: canaryFeatures,
diff --git a/dwds/test/instances/instance_test.dart b/dwds/test/instances/instance_test.dart
index 105cc84e6..d57795479 100644
--- a/dwds/test/instances/instance_test.dart
+++ b/dwds/test/instances/instance_test.dart
@@ -16,7 +16,7 @@ void main() {
   final debug = false;
   final canaryFeatures = false;
 
-  group('canaryFeatures: $canaryFeatures |', () {
+  group('canary: $canaryFeatures |', () {
     final provider = TestSdkConfigurationProvider(
       canaryFeatures: canaryFeatures,
       verbose: debug,
diff --git a/dwds/test/instances/patterns_inspection_canary_test.dart b/dwds/test/instances/patterns_inspection_canary_test.dart
index 743a644d4..30559bec8 100644
--- a/dwds/test/instances/patterns_inspection_canary_test.dart
+++ b/dwds/test/instances/patterns_inspection_canary_test.dart
@@ -17,7 +17,7 @@ void main() {
   final debug = false;
   final canaryFeatures = true;
 
-  group('canaryFeatures: $canaryFeatures |', () {
+  group('canary: $canaryFeatures |', () {
     final provider = TestSdkConfigurationProvider(
       verbose: debug,
       canaryFeatures: canaryFeatures,
diff --git a/dwds/test/instances/patterns_inspection_test.dart b/dwds/test/instances/patterns_inspection_test.dart
index 1f802b152..1b6b7f2a7 100644
--- a/dwds/test/instances/patterns_inspection_test.dart
+++ b/dwds/test/instances/patterns_inspection_test.dart
@@ -17,7 +17,7 @@ void main() {
   final debug = false;
   final canaryFeatures = false;
 
-  group('canaryFeatures: $canaryFeatures |', () {
+  group('canary: $canaryFeatures |', () {
     final provider = TestSdkConfigurationProvider(
       verbose: debug,
       canaryFeatures: canaryFeatures,
diff --git a/dwds/test/instances/record_inspection_canary_test.dart b/dwds/test/instances/record_inspection_canary_test.dart
index 6b216ccc6..dc65290f7 100644
--- a/dwds/test/instances/record_inspection_canary_test.dart
+++ b/dwds/test/instances/record_inspection_canary_test.dart
@@ -17,7 +17,7 @@ void main() {
   final debug = false;
   final canaryFeatures = true;
 
-  group('canaryFeatures: $canaryFeatures |', () {
+  group('canary: $canaryFeatures |', () {
     final provider = TestSdkConfigurationProvider(
       verbose: debug,
       canaryFeatures: canaryFeatures,
diff --git a/dwds/test/instances/record_inspection_test.dart b/dwds/test/instances/record_inspection_test.dart
index bbc7de3dd..0cc8ed83c 100644
--- a/dwds/test/instances/record_inspection_test.dart
+++ b/dwds/test/instances/record_inspection_test.dart
@@ -17,7 +17,7 @@ void main() {
   final debug = false;
   final canaryFeatures = false;
 
-  group('canaryFeatures: $canaryFeatures |', () {
+  group('canary: $canaryFeatures |', () {
     final provider = TestSdkConfigurationProvider(
       verbose: debug,
       canaryFeatures: canaryFeatures,
diff --git a/dwds/test/instances/record_type_inspection_canary_test.dart b/dwds/test/instances/record_type_inspection_canary_test.dart
index 8a76b2d1d..50b8e7420 100644
--- a/dwds/test/instances/record_type_inspection_canary_test.dart
+++ b/dwds/test/instances/record_type_inspection_canary_test.dart
@@ -17,7 +17,7 @@ void main() {
   final debug = false;
   final canaryFeatures = true;
 
-  group('canaryFeatures: $canaryFeatures |', () {
+  group('canary: $canaryFeatures |', () {
     final provider = TestSdkConfigurationProvider(
       verbose: debug,
       canaryFeatures: canaryFeatures,
diff --git a/dwds/test/instances/record_type_inspection_test.dart b/dwds/test/instances/record_type_inspection_test.dart
index 70bdceeae..abf57d6dc 100644
--- a/dwds/test/instances/record_type_inspection_test.dart
+++ b/dwds/test/instances/record_type_inspection_test.dart
@@ -17,7 +17,7 @@ void main() {
   final debug = false;
   final canaryFeatures = false;
 
-  group('canaryFeatures: $canaryFeatures |', () {
+  group('canary: $canaryFeatures |', () {
     final provider = TestSdkConfigurationProvider(
       verbose: debug,
       canaryFeatures: canaryFeatures,
diff --git a/dwds/test/instances/type_inspection_canary_test.dart b/dwds/test/instances/type_inspection_canary_test.dart
index b3fb87621..65eaf0c29 100644
--- a/dwds/test/instances/type_inspection_canary_test.dart
+++ b/dwds/test/instances/type_inspection_canary_test.dart
@@ -17,7 +17,7 @@ void main() {
   final debug = false;
   final canaryFeatures = true;
 
-  group('canaryFeatures: $canaryFeatures |', () {
+  group('canary: $canaryFeatures |', () {
     final provider = TestSdkConfigurationProvider(
       verbose: debug,
       canaryFeatures: canaryFeatures,
diff --git a/dwds/test/instances/type_inspection_test.dart b/dwds/test/instances/type_inspection_test.dart
index cf746daee..4045528fa 100644
--- a/dwds/test/instances/type_inspection_test.dart
+++ b/dwds/test/instances/type_inspection_test.dart
@@ -17,7 +17,7 @@ void main() {
   final debug = false;
   final canaryFeatures = false;
 
-  group('canaryFeatures: $canaryFeatures |', () {
+  group('canary: $canaryFeatures |', () {
     final provider = TestSdkConfigurationProvider(
       verbose: debug,
       canaryFeatures: canaryFeatures,