diff --git a/integration_tests/wasm/test/hello_world_test.dart b/integration_tests/wasm/test/hello_world_test.dart
index 0cd79979a..a4fab2d3e 100644
--- a/integration_tests/wasm/test/hello_world_test.dart
+++ b/integration_tests/wasm/test/hello_world_test.dart
@@ -4,7 +4,7 @@
 
 @TestOn('wasm')
 // TODO: https://github.com/dart-lang/test/issues/2288
-@OnPlatform({'firefox': Skip()})
+@OnPlatform({'windows && firefox': Skip()})
 // This retry is a regression test for https://github.com/dart-lang/test/issues/2006
 @Retry(2)
 library;
diff --git a/pkgs/test/CHANGELOG.md b/pkgs/test/CHANGELOG.md
index 8a6e13f8a..7959a1d7e 100644
--- a/pkgs/test/CHANGELOG.md
+++ b/pkgs/test/CHANGELOG.md
@@ -1,5 +1,8 @@
 ## 1.25.15-wip
 
+* Support using the OS platform selector to configure browser tests.
+  TODO: Longer changelog with potential impacts.
+
 ## 1.25.14
 
 * Use secure random for url secrets.
diff --git a/pkgs/test/pubspec.yaml b/pkgs/test/pubspec.yaml
index c9d2641ec..8a27b9b22 100644
--- a/pkgs/test/pubspec.yaml
+++ b/pkgs/test/pubspec.yaml
@@ -35,8 +35,8 @@ dependencies:
   stream_channel: ^2.1.0
 
   # Use an exact version until the test_api and test_core package are stable.
-  test_api: 0.7.4
-  test_core: 0.6.8
+  test_api: 0.7.5-wip
+  test_core: 0.6.9-wip
 
   typed_data: ^1.3.0
   web_socket_channel: '>=2.0.0 <4.0.0'
diff --git a/pkgs/test_api/CHANGELOG.md b/pkgs/test_api/CHANGELOG.md
index 98d65baea..4fffa4e05 100644
--- a/pkgs/test_api/CHANGELOG.md
+++ b/pkgs/test_api/CHANGELOG.md
@@ -1,3 +1,5 @@
+## 0.7.5-wip
+
 ## 0.7.4
 
 * Allow `analyzer: '>=6.0.0 <8.0.0'`
diff --git a/pkgs/test_api/lib/src/backend/suite_platform.dart b/pkgs/test_api/lib/src/backend/suite_platform.dart
index baab6cee1..bdc30892e 100644
--- a/pkgs/test_api/lib/src/backend/suite_platform.dart
+++ b/pkgs/test_api/lib/src/backend/suite_platform.dart
@@ -38,9 +38,6 @@ final class SuitePlatform {
       this.os = OperatingSystem.none,
       this.inGoogle = false})
       : compiler = compiler ?? runtime.defaultCompiler {
-    if (runtime.isBrowser && os != OperatingSystem.none) {
-      throw ArgumentError('No OS should be passed for runtime "$runtime".');
-    }
     if (!runtime.supportedCompilers.contains(this.compiler)) {
       throw ArgumentError(
           'The platform $runtime does not support the compiler ${this.compiler}');
diff --git a/pkgs/test_api/pubspec.yaml b/pkgs/test_api/pubspec.yaml
index af5cb931d..17751fea2 100644
--- a/pkgs/test_api/pubspec.yaml
+++ b/pkgs/test_api/pubspec.yaml
@@ -1,5 +1,5 @@
 name: test_api
-version: 0.7.4
+version: 0.7.5-wip
 description: >-
   The user facing API for structuring Dart tests and checking expectations.
 repository: https://github.com/dart-lang/test/tree/master/pkgs/test_api
diff --git a/pkgs/test_core/CHANGELOG.md b/pkgs/test_core/CHANGELOG.md
index 4c305bc61..5e2553d0c 100644
--- a/pkgs/test_core/CHANGELOG.md
+++ b/pkgs/test_core/CHANGELOG.md
@@ -1,3 +1,5 @@
+## 0.6.9-wip
+
 ## 0.6.8
 
 * Fix hang when running multiple precompiled browser tests.
diff --git a/pkgs/test_core/lib/src/util/io.dart b/pkgs/test_core/lib/src/util/io.dart
index a082dd310..fa0cd2994 100644
--- a/pkgs/test_core/lib/src/util/io.dart
+++ b/pkgs/test_core/lib/src/util/io.dart
@@ -51,10 +51,12 @@ final currentOS = OperatingSystem.findByIoName(Platform.operatingSystem);
 /// [OperatingSystem.none].
 // TODO: https://github.com/dart-lang/test/issues/2119 - require compiler
 SuitePlatform currentPlatform(Runtime runtime, [Compiler? compiler]) =>
-    SuitePlatform(runtime,
-        compiler: compiler,
-        os: runtime.isBrowser ? OperatingSystem.none : currentOS,
-        inGoogle: inGoogle);
+    SuitePlatform(
+      runtime,
+      compiler: compiler,
+      os: currentOS,
+      inGoogle: inGoogle,
+    );
 
 /// A transformer that decodes bytes using UTF-8 and splits them on newlines.
 final lineSplitter = StreamTransformer<List<int>, String>(
diff --git a/pkgs/test_core/pubspec.yaml b/pkgs/test_core/pubspec.yaml
index d08e24ca9..0516fbd77 100644
--- a/pkgs/test_core/pubspec.yaml
+++ b/pkgs/test_core/pubspec.yaml
@@ -1,5 +1,5 @@
 name: test_core
-version: 0.6.8
+version: 0.6.9-wip
 description: A basic library for writing tests and running them on the VM.
 repository: https://github.com/dart-lang/test/tree/master/pkgs/test_core
 resolution: workspace
@@ -27,7 +27,7 @@ dependencies:
   stack_trace: ^1.10.0
   stream_channel: ^2.1.0
   # Use an exact version until the test_api package is stable.
-  test_api: 0.7.4
+  test_api: 0.7.5-wip
   vm_service: ">=6.0.0 <16.0.0"
   yaml: ^3.0.0