diff --git a/tests/test_tcp.py b/tests/test_tcp.py
index 80584a86..b592e444 100644
--- a/tests/test_tcp.py
+++ b/tests/test_tcp.py
@@ -405,7 +405,7 @@ async def client(addr):
             self.assertEqual(await reader.readexactly(2), b'OK')
 
             re = r'(a bytes-like object)|(must be byte-ish)'
-            if sys.version_info >= (3, 14):
+            if sys.version_info >= (3, 13, 9):
                 re += r'|(must be a bytes, bytearray, or memoryview object)'
             with self.assertRaisesRegex(TypeError, re):
                 writer.write('AAAA')