1 files changed, 7 insertions, 4 deletions
diff --git a/Library/Homebrew/test/test_os_mac_language.rb b/Library/Homebrew/test/test_os_mac_language.rb
index 709913000..e328db5e0 100644
--- a/Library/Homebrew/test/test_os_mac_language.rb
+++ b/Library/Homebrew/test/test_os_mac_language.rb
@@ -1,16 +1,19 @@
 require "testing_env"
+require "locale"
 require "os/mac"
 
 class OSMacLanguageTests < Homebrew::TestCase
-  LANGUAGE_REGEX = /\A[a-z]{2}(-[A-Z]{2})?(-[A-Z][a-z]{3})?\Z/
-
   def test_languages_format
     OS::Mac.languages.each do |language|
-      assert_match LANGUAGE_REGEX, language
+      assert_nothing_raised do
+        Locale.parse(language)
+      end
     end
   end
 
   def test_language_format
-    assert_match LANGUAGE_REGEX, OS::Mac.language
+    assert_nothing_raised do
+      Locale.parse(OS::Mac.language)
+    end
   end
 end