diff --git a/fbgemm_gpu/experimental/gemm/test/fp8_gemm_test.py b/fbgemm_gpu/experimental/gemm/test/fp8_gemm_test.py
index 1c78f065d4..89f510e001 100644
--- a/fbgemm_gpu/experimental/gemm/test/fp8_gemm_test.py
+++ b/fbgemm_gpu/experimental/gemm/test/fp8_gemm_test.py
@@ -156,6 +156,8 @@ def _quantize_matmul_fp8(
 
             expected_result = a @ b.T
             if use_bias:
+                # pyre-fixme[6]: For 1st argument expected `Union[bool, complex,
+                #  float, int, Tensor]` but got `Optional[Tensor]`.
                 expected_result += bias
             self.assertTrue(
                 torch.allclose(result, expected_result, atol=2e-1, rtol=5e-2)