diff --git a/python/paddle/fluid/tests/unittests/CMakeLists.txt b/python/paddle/fluid/tests/unittests/CMakeLists.txt
index 951dae1e61baec54309dbcba87a3f8c9ac69782c..96a602538cacfa4a3bf8cbb5a5482677e308420b 100644
--- a/python/paddle/fluid/tests/unittests/CMakeLists.txt
+++ b/python/paddle/fluid/tests/unittests/CMakeLists.txt
@@ -1029,7 +1029,7 @@ if((WITH_ROCM OR WITH_GPU) AND NOT WIN32)
     set_tests_properties(test_collective_sendrecv PROPERTIES TIMEOUT 120)
 endif()
 if(WITH_GPU OR WITH_ROCM)
-    set_tests_properties(test_imperative_auto_mixed_precision PROPERTIES TIMEOUT 120)
+    set_tests_properties(test_imperative_auto_mixed_precision PROPERTIES TIMEOUT 300)
     set_tests_properties(test_parallel_dygraph_sync_batch_norm PROPERTIES TIMEOUT 120)
     set_tests_properties(test_rank_attention_op PROPERTIES TIMEOUT 120)
 endif()