1 files changed, 25 insertions, 0 deletions
diff --git a/railties/test/application/configuration_test.rb b/railties/test/application/configuration_test.rb
index bb45018a86..49f63d5d31 100644
--- a/railties/test/application/configuration_test.rb
+++ b/railties/test/application/configuration_test.rb
@@ -1408,5 +1408,30 @@ module ApplicationTests
       Rails.application.load_generators
       assert Rails.configuration.api_only
     end
+
+    test "debug_exception_response_format is :api by default if only_api is enabled" do
+      add_to_config <<-RUBY
+        config.api_only = true
+      RUBY
+      app 'development'
+
+      assert_equal :api, Rails.configuration.debug_exception_response_format
+    end
+
+    test "debug_exception_response_format can be override" do
+      add_to_config <<-RUBY
+        config.api_only = true
+      RUBY
+
+      app_file 'config/environments/development.rb', <<-RUBY
+      Rails.application.configure do
+        config.debug_exception_response_format = :default
+      end
+      RUBY
+
+      app 'development'
+
+      assert_equal :default, Rails.configuration.debug_exception_response_format
+    end
   end
 end