diff --git a/test/unit/shell_test.py b/test/unit/shell_test.py
index 2047e3b6431..e219299cfd2 100644
--- a/test/unit/shell_test.py
+++ b/test/unit/shell_test.py
@@ -7,7 +7,7 @@
 
 class TestShell:
     def test_quote(self):
-        assert Shell.quote('aa\!') == 'aa\\\\\\!'
+        assert Shell.quote(r'aa\!') == 'aa\\\\\\!'
 
     @patch('kiwi.path.Path.which')
     def test_quote_key_value_file(self, mock_which):