diff --git a/core/modules/color/lib/Drupal/color/Tests/ColorTest.php b/core/modules/color/lib/Drupal/color/Tests/ColorTest.php
index 6238019..79462be 100644
--- a/core/modules/color/lib/Drupal/color/Tests/ColorTest.php
+++ b/core/modules/color/lib/Drupal/color/Tests/ColorTest.php
@@ -118,6 +118,7 @@ function _testColor($theme, $test_values) {
     $this->drupalLogin($this->big_user);
     $this->drupalGet($settings_path);
     $this->assertResponse(200);
+    $this->assertUniqueText('Color set');
     $edit['scheme'] = '';
     $edit[$test_values['palette_input']] = '#123456';
     $this->drupalPostForm($settings_path, $edit, t('Save configuration'));