diff --git a/test/tensorrt/test_converter_activation.py b/test/tensorrt/test_converter_activation.py
index 3e385bd57e993..f07a1a304f26f 100644
--- a/test/tensorrt/test_converter_activation.py
+++ b/test/tensorrt/test_converter_activation.py
@@ -20,7 +20,7 @@
 import paddle
 
 
-class TestEluTRTPatternCase1(TensorRTBaseTest):
+class TestEluTRTPattern(TensorRTBaseTest):
     def setUp(self):
         self.python_api = paddle.nn.functional.elu
         self.api_args = {
@@ -35,21 +35,8 @@ def setUp(self):
     def test_trt_result(self):
         self.check_trt_result()
 
-
-class TestEluTRTPatternCase2(TensorRTBaseTest):
-    def setUp(self):
-        self.python_api = paddle.nn.functional.elu
-        self.api_args = {
-            "x": np.random.randn(3).astype("float16"),
-            "alpha": 1.0,
-        }
-        self.program_config = {"feed_list": ["x"]}
-        self.min_shape = {"x": [1]}
-        self.opt_shape = {"x": [1]}
-        self.max_shape = {"x": [5]}
-
-    def test_trt_result(self):
-        self.check_trt_result()
+    def test_trt_result_fp16(self):
+        self.check_trt_result(rtol=1e-3, atol=1e-3, precision_mode="fp16")
 
 
 class TestHardSigmoidTRTPattern(TensorRTBaseTest):