diff --git a/pandas/tests/io/test_common.py b/pandas/tests/io/test_common.py
index 730043e6ec7d7..0c79ef4378b66 100644
--- a/pandas/tests/io/test_common.py
+++ b/pandas/tests/io/test_common.py
@@ -141,7 +141,7 @@ def test_read_non_existant(self, reader, module, error_class, fn_ext):
         pytest.importorskip(module)
 
         path = os.path.join(HERE, "data", "does_not_exist." + fn_ext)
-        msg1 = r"File (b')?.+does_not_exist\.{}'? does not exist".format(fn_ext)
+        msg1 = fr"File (b')?.+does_not_exist\.{fn_ext}'? does not exist"
         msg2 = fr"\[Errno 2\] No such file or directory: '.+does_not_exist\.{fn_ext}'"
         msg3 = "Expected object or value"
         msg4 = "path_or_buf needs to be a string file path or file-like"