diff --git a/spec/mailers/user_notifications_spec.rb b/spec/mailers/user_notifications_spec.rb
index 076a60154..a30929097 100644
--- a/spec/mailers/user_notifications_spec.rb
+++ b/spec/mailers/user_notifications_spec.rb
@@ -430,11 +430,11 @@ describe UserNotifications do
       end
     end
 
-    context "user locale is not a valid locale" do
+    context "user locale is an empty string" do
       %w(signup signup_after_approval authorize_email forgot_password admin_login account_created).each do |mail_type|
         include_examples "notification derived from template" do
           SiteSetting.default_locale = "en"
-          let(:locale) { "invalid" }
+          let(:locale) { "" }
           let(:mail_type) { mail_type }
           it "sets the locale" do
             expects_build_with(has_entry(:locale, nil))