diff --git a/engine/src/flutter/shell/testing/observatory/launcher.dart b/engine/src/flutter/shell/testing/observatory/launcher.dart
index e724c0a626a..c3434c729fa 100644
--- a/engine/src/flutter/shell/testing/observatory/launcher.dart
+++ b/engine/src/flutter/shell/testing/observatory/launcher.dart
@@ -35,7 +35,7 @@ class ShellProcess {
 
   Uri? _extractVMServiceUri(String str) {
     final listeningMessageRegExp = RegExp(
-      r'(?:Observatory|Dart VM Service) listening on ((http|//)[a-zA-Z0-9:/=_\-\.\[\]]+)',
+      r'(?:Observatory|The Dart VM Service is) listening on ((http|//)[a-zA-Z0-9:/=_\-\.\[\]]+)',
     );
     final match = listeningMessageRegExp.firstMatch(str);
     if (match != null) {
diff --git a/engine/src/flutter/testing/android_systrace_test.py b/engine/src/flutter/testing/android_systrace_test.py
index cb730b11d06..0d4606f8853 100755
--- a/engine/src/flutter/testing/android_systrace_test.py
+++ b/engine/src/flutter/testing/android_systrace_test.py
@@ -61,7 +61,7 @@ def LaunchPackage(package_name, activity_name, adb_path='adb'):
           '%s/%s' % (package_name, activity_name)], stderr=subprocess.STDOUT)
   for line in logcat.stdout:
     print('>>>>>>>> ' + line.strip())
-    if ('Observatory listening' in line) or ('Dart VM Service listening' in line):
+    if ('Observatory listening' in line) or ('Dart VM Service is listening' in line):
       logcat.kill()
       break