diff --git a/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInJavascriptTestBase.php b/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInJavascriptTestBase.php
index 2ce2bf6..a42a7c4 100644
--- a/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInJavascriptTestBase.php
+++ b/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInJavascriptTestBase.php
@@ -42,7 +42,7 @@ protected function enableTheme($theme) {
   protected function waitForOffCanvasToOpen() {
     $web_assert = $this->assertSession();
     $web_assert->assertWaitOnAjaxRequest();
-    $this->assertElementVisibleAfterWait('css', '#drupal-off-canvas');
+    $this->assertElementVisibleAfterWait('css', '#drupal-off-canvas', 1);
   }
 
   /**
diff --git a/core/scripts/run-tests.sh b/core/scripts/run-tests.sh
index 09a7aad..63e470d 100755
--- a/core/scripts/run-tests.sh
+++ b/core/scripts/run-tests.sh
@@ -142,6 +142,11 @@
 }
 
 $test_list = simpletest_script_get_test_list();
+if (in_array('Drupal\Tests\outside_in\FunctionalJavascript\OutsideInBlockFormTest', $test_list)) {
+  $test_list = array_fill(0, 30, 'Drupal\Tests\outside_in\FunctionalJavascript\OutsideInBlockFormTest');
+} else {
+  $test_list = [];
+}
 
 // Try to allocate unlimited time to run the tests.
 drupal_set_time_limit(0);