diff --git a/python/paddle/fluid/tests/unittests/ir/inference/test_trt_affine_channel_op.py b/python/paddle/fluid/tests/unittests/ir/inference/test_trt_affine_channel_op.py
index 8bbba7c8b55fefc29af21ee115582307262e85ef..90cdf784b1fcf74c5f8221b8e4144e9a75b8324f 100644
--- a/python/paddle/fluid/tests/unittests/ir/inference/test_trt_affine_channel_op.py
+++ b/python/paddle/fluid/tests/unittests/ir/inference/test_trt_affine_channel_op.py
@@ -70,7 +70,7 @@ class TRTAffineChannelTest(InferencePassTest):
             use_gpu = True
             atol = 1e-5
             if self.trt_parameters.precision == AnalysisConfig.Precision.Half:
-                atol = 1e-3
+                atol = 2e-2
             self.check_output_with_option(use_gpu, atol, flatten=True)
             self.assertTrue(
                 PassVersionChecker.IsCompatible('tensorrt_subgraph_pass'))