diff --git a/test/unit/lib/redmine/scm/adapters/git_adapter_test.rb b/test/unit/lib/redmine/scm/adapters/git_adapter_test.rb
index 2de03eecd..9e4e83229 100644
--- a/test/unit/lib/redmine/scm/adapters/git_adapter_test.rb
+++ b/test/unit/lib/redmine/scm/adapters/git_adapter_test.rb
@@ -365,6 +365,11 @@ begin
         assert_nil @adapter.cat('invalid')
       end
 
+      def test_cat_revision_invalid
+        assert     @adapter.cat('README')
+        assert_nil @adapter.cat('README', 'abcd1234efgh')
+      end
+
       private
 
       def test_scm_version_for(scm_command_version, version)