diff --git a/test/e2e_node/util.go b/test/e2e_node/util.go
index fde40d03c75..5a3599ee7fc 100644
--- a/test/e2e_node/util.go
+++ b/test/e2e_node/util.go
@@ -418,10 +418,10 @@ func restartKubelet() {
 	kubeletServiceName := findKubletServiceName(false)
 	// reset the kubelet service start-limit-hit
 	stdout, err := exec.Command("sudo", "systemctl", "reset-failed", kubeletServiceName).CombinedOutput()
-	framework.ExpectNoError(err, "Failed to reset kubelet start-limit-hit with systemctl: %v, %v", err, stdout)
+	framework.ExpectNoError(err, "Failed to reset kubelet start-limit-hit with systemctl: %v, %s", err, string(stdout))
 
 	stdout, err = exec.Command("sudo", "systemctl", "restart", kubeletServiceName).CombinedOutput()
-	framework.ExpectNoError(err, "Failed to restart kubelet with systemctl: %v, %v", err, stdout)
+	framework.ExpectNoError(err, "Failed to restart kubelet with systemctl: %v, %s", err, string(stdout))
 }
 
 // stopKubelet will kill the running kubelet, and returns a func that will restart the process again
@@ -430,14 +430,14 @@ func stopKubelet() func() {
 
 	// reset the kubelet service start-limit-hit
 	stdout, err := exec.Command("sudo", "systemctl", "reset-failed", kubeletServiceName).CombinedOutput()
-	framework.ExpectNoError(err, "Failed to reset kubelet start-limit-hit with systemctl: %v, %v", err, stdout)
+	framework.ExpectNoError(err, "Failed to reset kubelet start-limit-hit with systemctl: %v, %s", err, string(stdout))
 
 	stdout, err = exec.Command("sudo", "systemctl", "kill", kubeletServiceName).CombinedOutput()
-	framework.ExpectNoError(err, "Failed to stop kubelet with systemctl: %v, %v", err, stdout)
+	framework.ExpectNoError(err, "Failed to stop kubelet with systemctl: %v, %s", err, string(stdout))
 
 	return func() {
 		stdout, err := exec.Command("sudo", "systemctl", "start", kubeletServiceName).CombinedOutput()
-		framework.ExpectNoError(err, "Failed to restart kubelet with systemctl: %v, %v", err, stdout)
+		framework.ExpectNoError(err, "Failed to restart kubelet with systemctl: %v, %s", err, string(stdout))
 	}
 }