diff --git a/.coveragerc b/.coveragerc
new file mode 100644
index 00000000..5ce4e22e
--- /dev/null
+++ b/.coveragerc
@@ -0,0 +1,12 @@
+[run]
+branch = True
+source = prometheus_client
+
+[paths]
+source =
+   prometheus_client
+   .tox/*/lib/python*/site-packages/prometheus_client
+   .tox/pypy/site-packages/prometheus_client
+
+[report]
+show_missing = True
diff --git a/.gitignore b/.gitignore
index 2849cc3e..043223b4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,6 @@ dist
 *.egg-info
 *.pyc
 *.swp
+.coverage.*
+.coverage
+.tox
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 00000000..f9674a57
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,30 @@
+sudo: false
+cache:
+  directories:
+    - $HOME/.cache/pip
+
+language: python
+
+matrix:
+  include:
+    - python: "2.7"
+      env: TOXENV=py27
+    - python: "2.7"
+      env: TOXENV=py27-nooptionals
+    - python: "3.4"
+      env: TOXENV=py34
+    - python: "3.5"
+      env: TOXENV=py35
+    - python: "3.5"
+      env: TOXENV=py35-nooptionals
+    - python: "pypy"
+      env: TOXENV=pypy
+
+install:
+  - pip install tox
+
+script:
+  - tox
+
+notifications:
+  email: false
diff --git a/setup.py b/setup.py
index 976ac0e7..463ed6fd 100644
--- a/setup.py
+++ b/setup.py
@@ -21,6 +21,14 @@
         "Intended Audience :: Developers",
         "Intended Audience :: Information Technology",
         "Intended Audience :: System Administrators",
+        "Programming Language :: Python",
+        "Programming Language :: Python :: 2",
+        "Programming Language :: Python :: 2.7",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.4",
+        "Programming Language :: Python :: 3.5",
+        "Programming Language :: Python :: Implementation :: CPython",
+        "Programming Language :: Python :: Implementation :: PyPy",
         "Topic :: System :: Monitoring",
         "License :: OSI Approved :: Apache Software License",
     ],
diff --git a/tests/test_exposition.py b/tests/test_exposition.py
index ebfc957b..4bf8d71c 100644
--- a/tests/test_exposition.py
+++ b/tests/test_exposition.py
@@ -1,5 +1,6 @@
 from __future__ import unicode_literals
 import os
+import sys
 import threading
 import time
 import unittest
@@ -160,6 +161,10 @@ def test_delete_with_groupingkey(self):
         self.assertEqual(self.requests[0][0].headers.get('content-type'), CONTENT_TYPE_LATEST)
         self.assertEqual(self.requests[0][1], b'')
 
+    @unittest.skipIf(
+        sys.platform == "darwin",
+        "instance_ip_grouping_key() does not work on macOS."
+    )
     def test_instance_ip_grouping_key(self):
         self.assertTrue('' != instance_ip_grouping_key()['instance'])
 
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 00000000..139aa481
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,38 @@
+[tox]
+envlist = coverage-clean,py27,py34,py35,pypy,{py27,py35}-nooptionals,coverage-report
+
+
+[base]
+deps =
+    coverage
+    pytest
+
+[testenv]
+deps =
+    {[base]deps}
+    twisted
+commands = coverage run --parallel -m pytest {posargs}
+
+
+; Ensure test suite passes if no optional dependencies are present.
+[testenv:py27-nooptionals]
+deps = {[base]deps}
+commands = coverage run --parallel -m pytest {posargs}
+
+[testenv:py35-nooptionals]
+deps = {[base]deps}
+commands = coverage run --parallel -m pytest {posargs}
+
+
+[testenv:coverage-clean]
+deps = coverage
+skip_install = true
+commands = coverage erase
+
+
+[testenv:coverage-report]
+deps = coverage
+skip_install = true
+commands =
+    coverage combine
+    coverage report
\ No newline at end of file