diff --git a/kernel/tests.c b/kernel/tests.c
index 72d16abb..8502d2aa 100644
--- a/kernel/tests.c
+++ b/kernel/tests.c
@@ -117,7 +117,9 @@ static int STDCALL join_test(void* arg)
 	return 0;
 }
 
+#ifdef CONFIG_LWIP
 void ping_send_now();
+#endif
 
 int test_init(void)
 {
@@ -127,8 +129,8 @@ int test_init(void)
 	sem_init(&consuming, 0);
 	mailbox_int32_init(&mbox);
 
-#ifdef CONFIG_LWIP
-	//ping_send_now();
+#if 0
+	ping_send_now();
 #endif
 
 	create_kernel_task(NULL, foo, "Hello from foo1\n");