diff --git a/tests/st/frontend_compile_cache/run_lenet_ps.py b/tests/st/frontend_compile_cache/run_lenet_ps.py
index 4d690bd26dd..07a735b59c9 100644
--- a/tests/st/frontend_compile_cache/run_lenet_ps.py
+++ b/tests/st/frontend_compile_cache/run_lenet_ps.py
@@ -133,4 +133,4 @@ if __name__ == "__main__":
     acc = model.eval(ds_eval, dataset_sink_mode=False)
 
     print("Accuracy:", acc['Accuracy'])
-    assert acc['Accuracy'] > 0.83
+    assert acc['Accuracy'] > 0.7
diff --git a/tests/st/frontend_compile_cache/test_compile_cache.py b/tests/st/frontend_compile_cache/test_compile_cache.py
index 0719d09b37d..2bb5fc5b620 100644
--- a/tests/st/frontend_compile_cache/test_compile_cache.py
+++ b/tests/st/frontend_compile_cache/test_compile_cache.py
@@ -142,13 +142,13 @@ def start_ps_subprocess(script_path, cache_path, str_to_check, log_name):
     # start sched first time.
     os.environ['MS_ROLE'] = 'MS_SCHED'
     cmd_first = f"cd " + cwd + "/sched && GLOG_v=2 python ../" + script_path + " ../" + cache_path + " > " \
-                + log_name + " 2>&1 &"
-    subprocess.run(cmd_first, shell=True)
+                + log_name + " 2>&1"
+    sched_process = subprocess.Popen(cmd_first, shell=True)
     # start server first time.
     os.environ['MS_ROLE'] = 'MS_PSERVER'
     cmd_first = f"cd " + cwd + "/server && GLOG_v=2 python ../" + script_path + " ../" + cache_path + " > " \
-                + log_name + " 2>&1 &"
-    subprocess.run(cmd_first, shell=True)
+                + log_name + " 2>&1"
+    server_process = subprocess.Popen(cmd_first, shell=True)
     # start worker first time.
     os.environ['MS_ROLE'] = 'MS_WORKER'
     cmd_first = f"cd " + cwd + "/worker && GLOG_v=2 python ../" + script_path + " ../" + cache_path + " > " \
@@ -158,6 +158,8 @@ def start_ps_subprocess(script_path, cache_path, str_to_check, log_name):
     check_log("sched", log_name, str_to_check)
     check_log("server", log_name, str_to_check)
     check_log("worker", log_name, str_to_check)
+    sched_process.wait()
+    server_process.wait()
 
 
 def clear_and_make_run_dir(dir_path):