diff --git a/power_manager/tools/suspend_stress_test b/power_manager/tools/suspend_stress_test
index f8d79ea..bea3251 100755
--- a/power_manager/tools/suspend_stress_test
+++ b/power_manager/tools/suspend_stress_test
@@ -95,6 +95,7 @@
 dump_stats_and_exit() {
   echo "${preserved_pm_print_times}" > /sys/power/pm_print_times
   restore_dark_resume_state
+  start tlsdated
   echo ""
   echo "Finished ${cur} iterations."
   echo "Suspend_failures: $(( cur -
@@ -152,6 +153,9 @@
 trap dump_stats_and_exit INT
 disable_dark_resume
 
+# Turn off network sync of time to prevent any spurious RTC wake events
+stop tlsdated
+
 cur=0
 firmware_errors=0
 last_successes=${initial_successes}