diff --git a/test_swap.c b/test_swap.c
index bf26d9e..a30bd3b 100644
--- a/test_swap.c
+++ b/test_swap.c
@@ -56,6 +56,7 @@ int main()
 
 	if (pid) {
 		munmap(p, SIZE);
+		sleep(3);
 		return 0;
 	}