Fix SyntaxWarning in test_syntax.py (GH-112944)

diff --git a/Lib/test/test_syntax.py b/Lib/test/test_syntax.py
index 99433df73387d0f6e9ad9f71d3d27a88b8f8a4ea..ece1366076798c99a51347b87ad951fbc500fd40 100644 (file)
--- a/Lib/test/test_syntax.py
+++ b/Lib/test/test_syntax.py
@@ -2336,7 +2336,7 @@ func(
 
         # Examples with dencodings
         s = b'# coding=latin\n(aaaaaaaaaaaaaaaaa\naaaaaaaaaaa\xb5'
-        self._check_error(s, "'\(' was never closed")
+        self._check_error(s, r"'\(' was never closed")
 
     def test_error_string_literal(self):