diff --git a/packages/flutter_tools/test/integration.shard/test_data/multidex_project.dart b/packages/flutter_tools/test/integration.shard/test_data/multidex_project.dart
index 3bd3f826622..7db55f9bd81 100644
--- a/packages/flutter_tools/test/integration.shard/test_data/multidex_project.dart
+++ b/packages/flutter_tools/test/integration.shard/test_data/multidex_project.dart
@@ -61,8 +61,9 @@ class MultidexProject extends Project {
   dependencies:
     flutter:
       sdk: flutter
-    cloud_firestore: ^2.5.3
-    firebase_core: ^1.6.0
+    # Pin to specific plugin versions to avoid out-of-band failures.
+    cloud_firestore: 2.5.3
+    firebase_core: 1.6.0
   ''';
 
   @override