diff --git a/src/dao/mongo.js b/src/dao/mongo.js
index 5ee6846..2416d16 100644
--- a/src/dao/mongo.js
+++ b/src/dao/mongo.js
@@ -25,21 +25,15 @@ const MongoClient = require('mongodb').MongoClient;
 class Mongo {
 
   /**
-   * Create an instance of the MongoDB client.
+   * Initializes the database client by connecting to the MongoDB.
    * @param {String} uri    The mongodb uri
    * @param {String} user   The databse user
    * @param {String} pass   The database user's password
-   */
-  constructor(options) {
-    this._uri = 'mongodb://' + options.user + ':' + options.pass + '@' + options.uri;
-  }
-
-  /**
-   * Initializes the database client by connecting to the MongoDB.
    * @yield {undefined}
    */
-  *connect() {
-    this._db = yield MongoClient.connect(this._uri);
+  *init(options) {
+    let uri = 'mongodb://' + options.user + ':' + options.pass + '@' + options.uri;
+    this._db = yield MongoClient.connect(uri);
   }
 
   /**
diff --git a/src/email/email.js b/src/email/email.js
index 2767da9..326494d 100644
--- a/src/email/email.js
+++ b/src/email/email.js
@@ -19,21 +19,14 @@
 
 const log = require('npmlog');
 const util = require('../service/util');
+const nodemailer = require('nodemailer');
+const openpgpEncrypt = require('nodemailer-openpgp').openpgpEncrypt;
 
 /**
  * A simple wrapper around Nodemailer to send verification emails
  */
 class Email {
 
-  /**
-   * Create an instance of the email object.
-   * @param  {Object} mailer   An instance of nodemailer
-   */
-  constructor(mailer, openpgpEncrypt) {
-    this._mailer = mailer;
-    this._openpgpEncrypt = openpgpEncrypt;
-  }
-
   /**
    * Create an instance of the reusable nodemailer SMTP transport.
    * @param {string}  host       SMTP server's hostname: 'smtp.gmail.com'
@@ -45,7 +38,7 @@ class Email {
    * @param {boolean} pgp        (optional) if outgoing emails are encrypted to the user's public key.
    */
   init(options) {
-    this._transport = this._mailer.createTransport({
+    this._transport = nodemailer.createTransport({
       host: options.host,
       port: options.port || 465,
       auth: options.auth,
@@ -53,7 +46,7 @@ class Email {
       requireTLS: (options.starttls !== undefined) ? util.isTrue(options.starttls) : true,
     });
     if (util.isTrue(options.pgp)) {
-      this._transport.use('stream', this._openpgpEncrypt());
+      this._transport.use('stream', openpgpEncrypt());
     }
     this._sender = options.sender;
   }
diff --git a/test/integration/app-test.js b/test/integration/app-test.js
index 177b209..b826572 100644
--- a/test/integration/app-test.js
+++ b/test/integration/app-test.js
@@ -23,8 +23,8 @@ describe('Koa App (HTTP Server) Integration Tests', function() {
 
   before(function *() {
     publicKeyArmored = fs.readFileSync(__dirname + '/../key1.asc', 'utf8');
-    mongo = new Mongo(config.mongo);
-    yield mongo.connect();
+    mongo = new Mongo();
+    yield mongo.init(config.mongo);
 
     sendEmailStub = sinon.stub().returns(Promise.resolve({ response:'250' }));
     sendEmailStub.withArgs(sinon.match(recipient => {
diff --git a/test/integration/email-test.js b/test/integration/email-test.js
index 25757c0..45ab949 100644
--- a/test/integration/email-test.js
+++ b/test/integration/email-test.js
@@ -5,8 +5,6 @@ require('co-mocha')(require('mocha')); // monkey patch mocha for generators
 const expect = require('chai').expect;
 const config = require('config');
 const Email = require('../../src/email/email');
-const nodemailer = require('nodemailer');
-const openpgpEncrypt = require('nodemailer-openpgp').openpgpEncrypt;
 const tpl = require('../../src/email/templates.json');
 
 describe('Email Integration Tests', function() {
@@ -22,7 +20,7 @@ describe('Email Integration Tests', function() {
       protocol: 'http',
       host: 'localhost:' + config.server.port
     };
-    email = new Email(nodemailer, openpgpEncrypt);
+    email = new Email();
     email.init(config.email);
   });
 
diff --git a/test/integration/mongo-test.js b/test/integration/mongo-test.js
index 4ebafce..e7a7316 100644
--- a/test/integration/mongo-test.js
+++ b/test/integration/mongo-test.js
@@ -13,8 +13,8 @@ describe('Mongo Integration Tests', function() {
   let mongo;
 
   before(function *() {
-    mongo = new Mongo(config.mongo);
-    yield mongo.connect();
+    mongo = new Mongo();
+    yield mongo.init(config.mongo);
   });
 
   beforeEach(function *() {
diff --git a/test/integration/public-key-test.js b/test/integration/public-key-test.js
index abc1978..d747d7b 100644
--- a/test/integration/public-key-test.js
+++ b/test/integration/public-key-test.js
@@ -25,8 +25,8 @@ describe('Public Key Integration Tests', function() {
 
   before(function *() {
     publicKeyArmored = require('fs').readFileSync(__dirname + '/../key1.asc', 'utf8');
-    mongo = new Mongo(config.mongo);
-    yield mongo.connect();
+    mongo = new Mongo();
+    yield mongo.init(config.mongo);
   });
 
   beforeEach(function *() {
diff --git a/test/integration/user-id-test.js b/test/integration/user-id-test.js
index aca6415..85796cb 100644
--- a/test/integration/user-id-test.js
+++ b/test/integration/user-id-test.js
@@ -15,8 +15,8 @@ describe('User ID Integration Tests', function() {
   let mongo, userId, uid1, uid2;
 
   before(function *() {
-    mongo = new Mongo(config.mongo);
-    yield mongo.connect();
+    mongo = new Mongo();
+    yield mongo.init(config.mongo);
     userId = new UserId(mongo);
   });