diff --git a/tests/platform/test_reboot.py b/tests/platform/test_reboot.py
index 67c65063fa..f8012fd305 100644
--- a/tests/platform/test_reboot.py
+++ b/tests/platform/test_reboot.py
@@ -70,7 +70,7 @@ def check_reboot_cause(dut, reboot_cause_expected):
     reboot_cause_got = output["stdout"]
     logging.debug("show reboot-cause returns {}".format(reboot_cause_got))
     m = re.search(reboot_cause_expected, reboot_cause_got)
-    assert m is not None, "got reboot-cause %s after rebooted by %s" % (reboot_cause_got, reboot_cause_expected)
+    return m is not None
 
 
 def reboot_and_check(localhost, dut, interfaces, reboot_type=REBOOT_TYPE_COLD, reboot_helper=None, reboot_kwargs=None):
@@ -125,7 +125,8 @@ def reboot_and_check(localhost, dut, interfaces, reboot_type=REBOOT_TYPE_COLD, r
     check_critical_services(dut)
 
     logging.info("Check reboot cause")
-    check_reboot_cause(dut, reboot_cause)
+    assert wait_until(120, 20, check_reboot_cause, dut, reboot_cause), \
+        "got reboot-cause failed after rebooted by %s" % reboot_cause
 
     if reboot_ctrl_dict[reboot_type]["test_reboot_cause_only"]:
         logging.info("Further checking skipped for {} test which intends to verify reboot-cause only".format(reboot_type))