diff --git a/src/transport.js b/src/transport.js
index f0762c0..3509650 100644
--- a/src/transport.js
+++ b/src/transport.js
@@ -124,5 +124,3 @@ module.exports = function (swarm) {
 function dialables (tp, multiaddrs) {
   return tp.filter(multiaddrs)
 }
-
-function noop () {}
diff --git a/test/swarm-muxing.node.js b/test/swarm-muxing.node.js
index c7d432a..941260e 100644
--- a/test/swarm-muxing.node.js
+++ b/test/swarm-muxing.node.js
@@ -55,9 +55,9 @@ describe('Switch (everything all together)', () => {
   })
 
   it('add tcp', (done) => {
-    switchA._peerInfo.multiaddrs.add('/ip4/127.0.0.1/tcp/0')
-    switchB._peerInfo.multiaddrs.add('/ip4/127.0.0.1/tcp/0')
-    switchC._peerInfo.multiaddrs.add('/ip4/127.0.0.1/tcp/0')
+    switchA._peerInfo.multiaddrs.add('/ip4/127.0.0.1/tcp/10100')
+    switchB._peerInfo.multiaddrs.add('/ip4/127.0.0.1/tcp/10200')
+    switchC._peerInfo.multiaddrs.add('/ip4/127.0.0.1/tcp/10300')
 
     switchA.transport.add('tcp', new TCP())
     switchB.transport.add('tcp', new TCP())