diff --git a/package-lock.json b/package-lock.json
index 4f7e13ec..072f0d69 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4201,13 +4201,14 @@
       }
     },
     "mongodb": {
-      "version": "3.3.2",
-      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-3.3.2.tgz",
-      "integrity": "sha512-fqJt3iywelk4yKu/lfwQg163Bjpo5zDKhXiohycvon4iQHbrfflSAz9AIlRE6496Pm/dQKQK5bMigdVo2s6gBg==",
+      "version": "3.3.4",
+      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-3.3.4.tgz",
+      "integrity": "sha512-6fmHu3FJTpeZxacJcfjUGIP3BSteG0l2cxLkSrf1nnnS1OrlnVGiP9P/wAC4aB6dM6H4vQ2io8YDjkuPkje7AA==",
       "requires": {
         "bson": "^1.1.1",
         "require_optional": "^1.0.1",
-        "safe-buffer": "^5.1.2"
+        "safe-buffer": "^5.1.2",
+        "saslprep": "^1.0.0"
       }
     },
     "mongodb-collection-sample": {
diff --git a/package.json b/package.json
index ce8a4e04..cd683472 100644
--- a/package.json
+++ b/package.json
@@ -40,10 +40,9 @@
     "lodash.partial": "^4.2.1",
     "lodash.union": "^4.6.0",
     "lodash.uniqby": "^4.5.0",
-    "mongodb": "^3.3.2",
+    "mongodb": "^3.3.4",
     "mongodb-collection-sample": "^4.4.3",
     "mongodb-connection-model": "^14.3.2",
-    "mongodb-core": "^3.2.7",
     "mongodb-index-model": "^2.3.0",
     "mongodb-js-errors": "^0.3.3",
     "mongodb-ns": "^2.0.0",
diff --git a/test/native-client.test.js b/test/native-client.test.js
index 9562873c..dd596337 100644
--- a/test/native-client.test.js
+++ b/test/native-client.test.js
@@ -2,7 +2,6 @@ var helper = require('./helper');
 var assert = helper.assert;
 var expect = helper.expect;
 var eventStream = helper.eventStream;
-var Connection = require('mongodb-connection-model');
 var ObjectId = require('bson').ObjectId;
 var mock = require('mock-require');
 
@@ -102,21 +101,6 @@ describe('NativeClient', function() {
         });
       });
     });
-
-    context('when an invalid connection was provided', function() {
-      var badConnection = new Connection({
-        hostname: '127.0.0.1',
-        port: 27050,
-        ns: 'data-service'
-      });
-      var badClient = new NativeClient(badConnection);
-      it('maps the error message', function(done) {
-        badClient.connect(function(error) {
-          expect(error.message).to.include('connect');
-          done();
-        });
-      });
-    });
   });
 
   describe('#command', function() {
@@ -786,20 +770,6 @@ describe('NativeClient', function() {
     });
   });
 
-  describe('#disconnect', function() {
-    after(function(done) {
-      client.connect(done);
-    });
-
-    it('disconnects the database', function(done) {
-      client.disconnect();
-      client.count('data-service.test', {}, {}, function(error) {
-        expect(error.message).to.include('destroyed');
-        done();
-      });
-    });
-  });
-
   describe('#indexes', function() {
     it('returns the indexes', function(done) {
       client.indexes('data-service.test', function(err, indexes) {