diff --git a/core/modules/system/src/Tests/Update/UpdatePathTestBase.php b/core/modules/system/src/Tests/Update/UpdatePathTestBase.php
index cd6d790..2dd61e5 100644
--- a/core/modules/system/src/Tests/Update/UpdatePathTestBase.php
+++ b/core/modules/system/src/Tests/Update/UpdatePathTestBase.php
@@ -279,8 +279,8 @@ protected function replaceUser1() {
    */
   protected function doSelectionTest() {
     // No-op. Tests wishing to do test the selection page or the general
-    //update.php environment before running update.php can override this
-    //method and implement their required tests.
+    // update.php environment before running update.php can override this method
+    // and implement their required tests.
   }
 
 }
diff --git a/core/modules/system/src/Tests/Update/UpdatePathTestJavaScriptTest.php b/core/modules/system/src/Tests/Update/UpdatePathTestJavaScriptTest.php
index cc6ba4c..f3c82d0 100644
--- a/core/modules/system/src/Tests/Update/UpdatePathTestJavaScriptTest.php
+++ b/core/modules/system/src/Tests/Update/UpdatePathTestJavaScriptTest.php
@@ -48,6 +48,7 @@ protected function doSelectionTest() {
 
       if (strpos($file_content, 'window.drupalSettings =') !== FALSE) {
         $found = TRUE;
+        break;
       }
     }