diff --git a/.travis.yml b/.travis.yml
index b715936..b265e70 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,7 +7,7 @@ node_js:
 
 script:
   - npm audit
-  - if [[ ${TRAVIS_NODE_VERSION:0:1} == "8" ]]; then npm run coveralls; else npm test; fi
+  - if [[ ${TRAVIS_NODE_VERSION:0:2} == "12" ]]; then npm run coveralls; else npm test; fi
 
 deploy:
   provider: npm
diff --git a/test/unit/Runner.test.js b/test/unit/Runner.test.js
index b11e050..f571314 100644
--- a/test/unit/Runner.test.js
+++ b/test/unit/Runner.test.js
@@ -5,14 +5,12 @@ const chaiAsPromised = require('chai-as-promised')
 
 chai.use(chaiAsPromised)
 chai.should()
+const assert = chai.assert
 
-const express = require('express')
 const RootEntity = require('../../src/RootEntity')
 const Saga = require('../../src/Saga')
 
 const ReadModel = require('../../src/ReadModel')
-const CommandDispatcherLocal = require('../../src/CommandDispatcherLocal')
-const EventDispatcherEventEmitter = require('../../src/EventDispatcherEventEmitter')
 const EventStoreJsonFile = require('../../src/EventStoreJsonFile')
 
 const InvalidArgumentError = require('../../src/GenericErrors/InvalidArgumentError')
@@ -48,6 +46,12 @@ describe('Runner', () => {
     subjectUnderTest = new Runner(commandDispatcher, eventDispatcher, logger, server)
   })
 
+  describe('get server', () => {
+    it('should get the server', () => {
+      assert.strictEqual(subjectUnderTest.server, server)
+    })
+  })
+
   describe('replayHistory', () => {
     it('should call the replayAll() method of the event dispatcher', async () => {
       eventDispatcher.replayAll = sinon.stub().resolves()