diff --git a/types/ip/ip-tests.ts b/types/ip/ip-tests.ts
index 13abf1f4a6..f1fbf4726d 100644
--- a/types/ip/ip-tests.ts
+++ b/types/ip/ip-tests.ts
@@ -20,3 +20,7 @@ ip.toString(buff);
 ip.subnet('192.168.1.134', '255.255.255.192');
 ip.cidrSubnet('192.168.1.134/26');
 ip.cidrSubnet('192.168.1.134/26').contains('192.168.1.134');
+var buf = new Buffer(128);
+var offset = 64;
+ip.toBuffer('127.0.0.1', buf, offset);
+ip.toString(buf, offset, 4);