diff --git a/test/test_mps.py b/test/test_mps.py
index b2f7d64..e4cdd1d 100644
--- a/test/test_mps.py
+++ b/test/test_mps.py
@@ -9436,8 +9436,8 @@
                     output = F.grid_sample(input, grid, mode=mode, padding_mode=padding_mode,
                                            align_corners=align_corners)
                     self.assertEqual(output, groundtruth, atol=1e-5, rtol=0,
-                                     msg="groundtruth comparison failed for mode={}, "
-                                     "padding_mode={}".format(mode, padding_mode))
+                                     msg=f"groundtruth comparison failed for mode={mode}, "
+                                     f"padding_mode={padding_mode}")
 
 class TestAdvancedIndexing(TestCaseMPS):
     supported_dtypes = [torch.float32, torch.float16, torch.int64, torch.int32, torch.int16, torch.uint8]