diff --git a/tests/basic/test_coder.py b/tests/basic/test_coder.py
index e4d99fa6f..538ae8e3f 100644
--- a/tests/basic/test_coder.py
+++ b/tests/basic/test_coder.py
@@ -325,7 +325,7 @@ class TestCoder(unittest.TestCase):
                 #    {test_files[1]},
                 # ),
                 # Files with Windows-style paths
-                (f"Edit the file {test_files[2].replace('/', '\\')}", {test_files[2]}),
+                (f"Edit the file {test_files[2].replace('/', r'\\')}", {test_files[2]}),
                 # Files with different quote styles
                 (f'Check "{test_files[5]}" now', {test_files[5]}),
                 # All files in one complex message