diff --git a/dev/devicelab/bin/tasks/module_test_ios.dart b/dev/devicelab/bin/tasks/module_test_ios.dart
index b4058c53d44..d78840fcafe 100644
--- a/dev/devicelab/bin/tasks/module_test_ios.dart
+++ b/dev/devicelab/bin/tasks/module_test_ios.dart
@@ -154,8 +154,8 @@ Future<void> main() async {
             'Debug',
             'CODE_SIGNING_ALLOWED=NO',
             'CODE_SIGNING_REQUIRED=NO',
-            'CODE_SIGN_IDENTITY=',
-            'EXPANDED_CODE_SIGN_IDENTITY=',
+            'CODE_SIGN_IDENTITY=-',
+            'EXPANDED_CODE_SIGN_IDENTITY=-',
             'CONFIGURATION_BUILD_DIR=${tempDir.path}',
           ],
         );