diff --git a/.github/workflows/integration.yml b/.github/workflows/integration.yml
new file mode 100644
index 0000000..6a206e1
--- /dev/null
+++ b/.github/workflows/integration.yml
@@ -0,0 +1,41 @@
+name: 'Integration Tests'
+
+# Notes:
+#  https://github.community/t5/GitHub-Actions/Github-Actions-services-not-reachable/m-p/30739/highlight/true#M538
+
+on:
+  pull_request:
+    branches:
+      - master
+      - next
+
+jobs:
+  baseline:
+    name: Baseline Tests
+    runs-on: ubuntu-latest
+
+    # services:
+    #   openldap:
+    #     image: docker.pkg.github.com/ldapjs/docker-test-openldap/openldap:1.0
+    #     ports:
+    #       - 389:389
+    #       - 636:636
+
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions/setup-node@v1
+
+      # Hack way to start service since GitHub doesn't integrate with its own services
+      - name: Docker login
+        run: docker login docker.pkg.github.com -u ${GITHUB_ACTOR} -p ${GITHUB_TOKEN}
+        env:
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
+      - name: Pull Docker image
+        run: docker pull "docker.pkg.github.com/ldapjs/docker-test-openldap/openldap:1.0"
+      - name: Start OpenLDAP service
+        run: docker run -it -d --name openldap -p 389:389 -p 636:636 docker.pkg.github.com/ldapjs/docker-test-openldap/openldap:1.0
+
+      - name: Install Packages
+        run: npm install
+      - name: Run Tests
+        run: npm run test:integration
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index cd114b9..c9468cb 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -42,10 +42,10 @@ jobs:
       - name: Coveralls Parallel
         uses: coverallsapp/github-action@master
         with:
-          github-token: ${{ secrets.github_token }}
+          github-token: ${{ secrets.GITHUB_TOKEN }}
           parallel: true
       - name: Coveralls Finished
         uses: coverallsapp/github-action@master
         with:
-          github-token: ${{ secrets.github_token }}
+          github-token: ${{ secrets.GITHUB_TOKEN }}
           parallel-finished: true
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..86dbede
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,8 @@
+version: '3'
+
+services:
+  openldap:
+    image: docker.pkg.github.com/ldapjs/docker-test-openldap/openldap:1.0
+    ports:
+      - 389:389
+      - 636:636
diff --git a/lib/client/client.js b/lib/client/client.js
index 80e3505..7daeeba 100644
--- a/lib/client/client.js
+++ b/lib/client/client.js
@@ -377,9 +377,8 @@ Client.prototype.exop = function exop (name, value, controls, callback) {
   if (typeof (value) === 'function') {
     callback = value
     controls = []
-    value = ''
+    value = undefined
   }
-  if (!(Buffer.isBuffer(value) || typeof (value) === 'string')) { throw new TypeError('value (Buffer || string) required') }
   if (typeof (controls) === 'function') {
     callback = controls
     controls = []
diff --git a/lib/url.js b/lib/url.js
index 4e1b061..6a12575 100644
--- a/lib/url.js
+++ b/lib/url.js
@@ -8,7 +8,13 @@ const filter = require('./filters/')
 module.exports = {
 
   parse: function (urlStr, parseDN) {
-    const parsedURL = new url.URL(urlStr)
+    let parsedURL
+    try {
+      parsedURL = new url.URL(urlStr)
+    } catch (error) {
+      throw new TypeError(urlStr + ' is an invalid LDAP url (scope)')
+    }
+
     if (!parsedURL.protocol || !(parsedURL.protocol === 'ldap:' || parsedURL.protocol === 'ldaps:')) { throw new TypeError(urlStr + ' is an invalid LDAP url (protocol)') }
 
     const u = {
diff --git a/package.json b/package.json
index 786b84b..07c7c6e 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "name": "ldapjs",
   "homepage": "http://ldapjs.org",
   "description": "LDAP client and server APIs",
-  "version": "2.0.0-pre.2",
+  "version": "2.0.0-pre.3",
   "license": "MIT",
   "repository": {
     "type": "git",
@@ -39,6 +39,8 @@
     "test:cov": "tap",
     "test:cov:html": "tap --coverage-report=html",
     "test:watch": "tap -n -w --no-coverage-report",
+    "test:integration": "tap --no-cov 'test-integration/**/*.test.js'",
+    "test:integration:local": "docker-compose up -d && npm run test:integration && docker-compose down",
     "lint": "standard | snazzy",
     "lint:ci": "standard"
   },
diff --git a/test-integration/client/connect.test.js b/test-integration/client/connect.test.js
new file mode 100644
index 0000000..1a82339
--- /dev/null
+++ b/test-integration/client/connect.test.js
@@ -0,0 +1,21 @@
+'use strict'
+
+const tap = require('tap')
+const ldapjs = require('../../lib')
+
+const SCHEME = process.env.SCHEME || 'ldap'
+const HOST = process.env.HOST || '127.0.0.1'
+const PORT = process.env.PORT || 389
+
+const baseURL = `${SCHEME}://${HOST}:${PORT}`
+
+tap.test('connects to a server', t => {
+  t.plan(2)
+
+  const client = ldapjs.createClient({ url: baseURL })
+  client.bind('cn=Philip J. Fry,ou=people,dc=planetexpress,dc=com', 'fry', (err) => {
+    t.error(err)
+    t.pass()
+    client.unbind()
+  })
+})
diff --git a/test-integration/client/issues.test.js b/test-integration/client/issues.test.js
new file mode 100644
index 0000000..0992f65
--- /dev/null
+++ b/test-integration/client/issues.test.js
@@ -0,0 +1,58 @@
+'use strict'
+
+const tap = require('tap')
+const ldapjs = require('../../lib')
+
+const SCHEME = process.env.SCHEME || 'ldap'
+const HOST = process.env.HOST || '127.0.0.1'
+const PORT = process.env.PORT || 389
+
+const baseURL = `${SCHEME}://${HOST}:${PORT}`
+
+tap.test('modifyDN with long name (issue #480)', t => {
+  const longStr = 'a292979f2c86d513d48bbb9786b564b3c5228146e5ba46f404724e322544a7304a2b1049168803a5485e2d57a544c6a0d860af91330acb77e5907a9e601ad1227e80e0dc50abe963b47a004f2c90f570450d0e920d15436fdc771e3bdac0487a9735473ed3a79361d1778d7e53a7fb0e5f01f97a75ef05837d1d5496fc86968ff47fcb64'
+  const targetDN = 'cn=Turanga Leela,ou=people,dc=planetexpress,dc=com'
+  const client = ldapjs.createClient({ url: baseURL })
+  client.bind('cn=admin,dc=planetexpress,dc=com', 'GoodNewsEveryone', bindHandler)
+
+  function bindHandler (err) {
+    t.error(err)
+    client.modifyDN(
+      targetDN,
+      `cn=${longStr},ou=people,dc=planetexpress,dc=com`,
+      modifyHandler
+    )
+  }
+
+  function modifyHandler (err, res) {
+    t.error(err)
+    t.ok(res)
+    t.equal(res.status, 0)
+
+    client.modifyDN(
+      `cn=${longStr},ou=people,dc=planetexpress,dc=com`,
+      targetDN,
+      (err, res) => {
+        t.error(err)
+        client.unbind(t.end)
+      }
+    )
+  }
+})
+
+tap.test('whois works correctly (issue #370)', t => {
+  const client = ldapjs.createClient({ url: baseURL })
+  client.bind('cn=Philip J. Fry,ou=people,dc=planetexpress,dc=com', 'fry', (err) => {
+    t.error(err)
+
+    client.exop('1.3.6.1.4.1.4203.1.11.3', (err, value, res) => {
+      t.error(err)
+      t.ok(value)
+      t.is(value, 'dn:cn=Philip J. Fry,ou=people,dc=planetexpress,dc=com')
+      t.ok(res)
+      t.is(res.status, 0)
+
+      client.unbind(t.end)
+    })
+  })
+})
diff --git a/test/client.test.js b/test/client.test.js
index 5f7ee11..8d1090c 100644
--- a/test/client.test.js
+++ b/test/client.test.js
@@ -368,6 +368,17 @@ tap.test('createClient', t => {
     )
   })
 
+  tap.test('exception from bad createClient parameter (issue #418)', t => {
+    try {
+      // This port number is totally invalid. It will cause the URL parser
+      // to throw an exception that should be caught.
+      ldap.createClient({ url: 'ldap://127.0.0.1:13891389' })
+    } catch (error) {
+      t.ok(error)
+      t.end()
+    }
+  })
+
   // TODO: this test is really flaky. It would be better if we could validate
   // the options _withouth_ having to connect to a server.
   // t.test('attaches a child function to logger', async t => {