diff --git a/benchmark/dgram/array-vs-concat.js b/benchmark/dgram/array-vs-concat.js
index e47229811e8471..2a82ea48c754ed 100644
--- a/benchmark/dgram/array-vs-concat.js
+++ b/benchmark/dgram/array-vs-concat.js
@@ -41,7 +41,6 @@ var dgram = require('dgram');
 
 function server() {
   var sent = 0;
-  var received = 0;
   var socket = dgram.createSocket('udp4');
 
   var onsend = type === 'concat' ? onsendConcat : onsendMulti;
@@ -71,9 +70,5 @@ function server() {
     }, dur * 1000);
   });
 
-  socket.on('message', function(buf, rinfo) {
-    received++;
-  });
-
   socket.bind(PORT);
 }
diff --git a/benchmark/http/_chunky_http_client.js b/benchmark/http/_chunky_http_client.js
index 158be5a0eb6424..bde4eed7444e6f 100644
--- a/benchmark/http/_chunky_http_client.js
+++ b/benchmark/http/_chunky_http_client.js
@@ -50,8 +50,6 @@ function main(conf) {
     }
   }
 
-  var success = 0;
-  var failure = 0;
   var min = 10;
   var size = 0;
   var mod = 317;
@@ -69,14 +67,12 @@ function main(conf) {
       if ((d.length === pattern.length && d === pattern) ||
           (d.length > pattern.length &&
            d.slice(0, pattern.length) === pattern)) {
-        success += 1;
         did = true;
       } else {
         pattern = 'HTTP/1.1 ';
         if ((d.length === pattern.length && d === pattern) ||
             (d.length > pattern.length &&
              d.slice(0, pattern.length) === pattern)) {
-          failure += 1;
           did = true;
         }
       }
diff --git a/benchmark/static_http_server.js b/benchmark/static_http_server.js
index 43c493675933e7..13067d7b3eb890 100644
--- a/benchmark/static_http_server.js
+++ b/benchmark/static_http_server.js
@@ -6,7 +6,6 @@ var port = 12346;
 var n = 700;
 var bytes = 1024 * 5;
 
-var requests = 0;
 var responses = 0;
 
 var body = 'C'.repeat(bytes);
@@ -37,6 +36,5 @@ server.listen(port, function() {
       });
     });
     req.id = i;
-    requests++;
   }
 });