fix ut by serial run, test=develop (#23173)

python/paddle/fluid/tests/unittests/CMakeLists.txt

@@ -355,7 +355,6 @@ endif()
 set_tests_properties(test_parallel_executor_test_while_train test_parallel_executor_mnist
         test_parallel_executor_seresnext_base_gpu test_parallel_executor_seresnext_with_reduce_gpu
         test_parallel_executor_seresnext_with_fuse_all_reduce_gpu
-        test_parallel_executor_crf test_sync_batch_norm_op
         test_parallel_executor_feed_persistable_var
         test_parallel_executor_crf_auto_growth test_buffer_shared_memory_reuse_pass_and_fuse_optimization_op_pass
         test_data_norm_op test_imperative_using_non_zero_gpu test_fuse_bn_act_pass
@@ -365,6 +364,8 @@ set_tests_properties(test_parallel_executor_test_while_train test_parallel_execu
         test_fetch_unmerged
         test_buffer_shared_memory_reuse_pass PROPERTIES LABELS "RUN_TYPE=DIST")
 
+set_tests_properties(test_parallel_executor_crf test_sync_batch_norm_op PROPERTIES LABELS "RUN_TYPE=DIST" RUN_SERIAL TRUE)
+
 if(NOT WIN32 AND NOT APPLE)
     set_tests_properties(test_imperative_data_loader_base PROPERTIES LABELS "RUN_TYPE=EXCLUSIVE" RUN_SERIAL TRUE)
     set_tests_properties(test_imperative_data_loader_exception PROPERTIES LABELS "RUN_TYPE=EXCLUSIVE" RUN_SERIAL TRUE)