diff --git a/package.json b/package.json
index aa3fd15..58b0ffe 100644
--- a/package.json
+++ b/package.json
@@ -31,11 +31,12 @@
   },
   "homepage": "https://github.com/diasdavid/interface-transport",
   "devDependencies": {
-    "aegir": "^10.0.0"
+    "aegir": "^11.0.0",
+    "dirty-chai": "^1.2.2"
   },
   "dependencies": {
     "chai": "^3.5.0",
-    "multiaddr": "^2.2.1",
+    "multiaddr": "^2.2.2",
     "pull-goodbye": "0.0.1",
     "pull-serializer": "^0.3.2",
     "pull-stream": "^3.5.0"
@@ -46,4 +47,4 @@
     "Richard Littauer <richard.littauer@gmail.com>",
     "greenkeeperio-bot <support@greenkeeper.io>"
   ]
-}
\ No newline at end of file
+}
diff --git a/src/dial-test.js b/src/dial-test.js
index 8f9d13b..85c1a6c 100644
--- a/src/dial-test.js
+++ b/src/dial-test.js
@@ -1,7 +1,10 @@
 /* eslint-env mocha */
 'use strict'
 
-const expect = require('chai').expect
+const chai = require('chai')
+const dirtyChai = require('dirty-chai')
+const expect = chai.expect
+chai.use(dirtyChai)
 const pull = require('pull-stream')
 const goodbye = require('pull-goodbye')
 const serializer = require('pull-serializer')
@@ -40,7 +43,7 @@ module.exports = (common) => {
       const s = serializer(goodbye({
         source: pull.values(['hey']),
         sink: pull.collect((err, values) => {
-          expect(err).to.not.exist
+          expect(err).to.not.exist()
           expect(
             values
           ).to.be.eql(
@@ -61,7 +64,7 @@ module.exports = (common) => {
       pull(
         transport.dial(addrs[1]),
         pull.onEnd((err) => {
-          expect(err).to.exist
+          expect(err).to.exist()
           done()
         })
       )
diff --git a/src/listen-test.js b/src/listen-test.js
index 5398c59..e43e393 100644
--- a/src/listen-test.js
+++ b/src/listen-test.js
@@ -2,7 +2,11 @@
 /* eslint-env mocha */
 'use strict'
 
-const expect = require('chai').expect
+const chai = require('chai')
+const dirtyChai = require('dirty-chai')
+const expect = chai.expect
+chai.use(dirtyChai)
+
 const pull = require('pull-stream')
 
 module.exports = (common) => {
@@ -66,7 +70,7 @@ module.exports = (common) => {
         const listener = transport.createListener()
 
         listener.on('connection', (conn) => {
-          expect(conn).to.exist
+          expect(conn).to.exist()
           finish()
         })
 
@@ -89,7 +93,7 @@ module.exports = (common) => {
       it.skip('error', (done) => {
         const listener = transport.createListener()
         listener.on('error', (err) => {
-          expect(err).to.exist
+          expect(err).to.exist()
           listener.close(done)
         })
       })
diff --git a/test/transport.spec.js b/test/transport.spec.js
index b7ff1bc..ccacec3 100644
--- a/test/transport.spec.js
+++ b/test/transport.spec.js
@@ -1,2 +1 @@
 'use strict'
-