diff --git a/src/rate_limit.c b/src/rate_limit.c
index f7c33b4..3ed94bf 100644
--- a/src/rate_limit.c
+++ b/src/rate_limit.c
@@ -58,24 +58,3 @@ int uc_ratelimit_allow(struct RateLimit *r, long current_ts)
     return allowed;
 }
 
-#if 0
-int main()
-{
-    int i;
-    struct RateLimit r;
-    time_t start;
-
-    uc_ratelimit_init(&r, 10, 60, time(NULL));
-
-    for(i = 0; i < 120; i++) {
-        int k;
-        long allowed = 0;
-        sleep(1);
-        for (k = 0; k < 500; k++) 
-            allowed += uc_ratelimit_allow(&r, time(NULL));
-        printf("%ld of 500 can pass\n", allowed);
-    }
-
-    return 0;
-}
-#endif
diff --git a/test/rate_limit.c b/test/rate_limit.c
new file mode 100644
index 0000000..1b5c714
--- /dev/null
+++ b/test/rate_limit.c
@@ -0,0 +1,25 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <time.h>
+#include "ucore/rate_limit.h"
+
+
+int main()
+{
+    int i;
+    struct RateLimit r;
+    time_t start;
+
+    uc_ratelimit_init(&r, 10, 60, time(NULL));
+
+    for(i = 0; i < 120; i++) {
+        int k;
+        long allowed = 0;
+        sleep(1);
+        for (k = 0; k < 500; k++) 
+            allowed += uc_ratelimit_allow(&r, time(NULL));
+        printf("%ld of 500 can pass\n", allowed);
+    }
+
+    return 0;
+}