diff --git a/lang/en/settings.php b/lang/en/settings.php
index f4c84092c..5427cb941 100644
--- a/lang/en/settings.php
+++ b/lang/en/settings.php
@@ -295,6 +295,7 @@ return [
         'bs' => 'Bosanski',
         'ca' => 'Català',
         'cs' => 'Česky',
+        'cy' => 'Cymraeg',
         'da' => 'Dansk',
         'de' => 'Deutsch (Sie)',
         'de_informal' => 'Deutsch (Du)',
diff --git a/tests/LanguageTest.php b/tests/LanguageTest.php
index 6b6856184..abe06407e 100644
--- a/tests/LanguageTest.php
+++ b/tests/LanguageTest.php
@@ -35,7 +35,8 @@ class LanguageTest extends TestCase
         $diffs = array_diff($this->langs, $dropdownLocales);
         if (count($diffs) > 0) {
             $diffText = implode(',', $diffs);
-            $this->addWarning("Languages: {$diffText} found in files but not in language select dropdown.");
+            $warning = "Languages: {$diffText} found in files but not in language select dropdown.";
+            $this->fail($warning);
         }
         $this->assertTrue(true);
     }