diff --git a/lib/html_config.dart b/lib/html_config.dart
index ef23d52da4b79e81d11841133d84c93b3603ffa1..67de52021bd22f0d95cc749656f38c1a39994c01 100644
--- a/lib/html_config.dart
+++ b/lib/html_config.dart
@@ -166,7 +166,8 @@ class HtmlConfiguration extends SimpleConfiguration {
 
   void onDone(bool success) {
     _uninstallHandlers();
-    window.postMessage('unittest-suite-done', '*');
+    window.postMessage(
+        success ? 'unittest-suite-done' : 'unittest-suite-fail', '*');
   }
 }