races

testing/scenario_app/bin/android_integration_tests.dart

@@ -140,7 +140,8 @@ void main(List<String> args) async {
     });
 
     await step('Killing logcat process...', () async {
-      logcatProcess.kill();
+      final bool delivered = logcatProcess.kill(ProcessSignal.sigkill);
+      assert(delivered);
     });
 
     await step('Dumping logcat (Errors only)...', () async {

testing/scenario_app/bin/utils/process_manager_extension.dart

@@ -31,8 +31,8 @@ Future<int> pipeProcessStreams(Process process, {StringSink? out}) async {
   await stdoutCompleter.future;
   await stderrCompleter.future;
 
-  stderrSub.cancel();
-  stdoutSub.cancel();
+  await stderrSub.cancel();
+  await stdoutSub.cancel();
   return exitCode;
 }