diff --git a/python/paddle/fluid/tests/custom_runtime/test_custom_cpu_plugin.py b/python/paddle/fluid/tests/custom_runtime/test_custom_cpu_plugin.py
index 9bf1ff43a26e96d5463faabad8818f1691b30346..4772ae00d3fc36a30b4e55cd73398f4d97b51028 100755
--- a/python/paddle/fluid/tests/custom_runtime/test_custom_cpu_plugin.py
+++ b/python/paddle/fluid/tests/custom_runtime/test_custom_cpu_plugin.py
@@ -57,6 +57,7 @@ class TestCustomCPUPlugin(unittest.TestCase):
         self._test_fallback_kernel()
         self._test_scalar()
         self._test_custom_device_py_api()
+        self._test_custom_device_mix_precision()
 
     def _test_custom_device_dataloader(self):
         import paddle