diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 531f3d7f..1b3a0857 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,14 @@
 Changelog
 ---------
 
+4.1.0 (unreleased)
+******************
+
+Features:
+
+* Add ``webargs.testing`` module, which exposes ``CommonTestCase``
+  to third-party parser libraries (see comments in :pr:`287`).
+
 4.0.0 (2018-07-15)
 ******************
 
diff --git a/tests/test_aiohttpparser.py b/tests/test_aiohttpparser.py
index 451bb67a..6e65afa3 100644
--- a/tests/test_aiohttpparser.py
+++ b/tests/test_aiohttpparser.py
@@ -5,7 +5,7 @@
 import pytest
 
 from webargs.core import MARSHMALLOW_VERSION_INFO
-from tests.common import CommonTestCase
+from webargs.testing import CommonTestCase
 from tests.apps.aiohttp_app import create_app
 
 
diff --git a/tests/test_bottleparser.py b/tests/test_bottleparser.py
index f0f32001..f949112d 100644
--- a/tests/test_bottleparser.py
+++ b/tests/test_bottleparser.py
@@ -1,7 +1,7 @@
 import pytest
 
 from .apps.bottle_app import app
-from .common import CommonTestCase
+from webargs.testing import CommonTestCase
 
 
 class TestBottleParser(CommonTestCase):
diff --git a/tests/test_djangoparser.py b/tests/test_djangoparser.py
index e6f5dc61..5b8497a4 100644
--- a/tests/test_djangoparser.py
+++ b/tests/test_djangoparser.py
@@ -4,7 +4,7 @@
 import pytest
 from tests.apps.django_app.base.wsgi import application
 
-from tests.common import CommonTestCase
+from webargs.testing import CommonTestCase
 
 
 class TestDjangoParser(CommonTestCase):
diff --git a/tests/test_falconparser.py b/tests/test_falconparser.py
index e73b0c86..77bafd2d 100644
--- a/tests/test_falconparser.py
+++ b/tests/test_falconparser.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 import pytest
 
-from tests.common import CommonTestCase
+from webargs.testing import CommonTestCase
 from tests.apps.falcon_app import create_app
 
 
diff --git a/tests/test_flaskparser.py b/tests/test_flaskparser.py
index a3e73def..4b62a8f7 100644
--- a/tests/test_flaskparser.py
+++ b/tests/test_flaskparser.py
@@ -12,7 +12,7 @@
 from webargs.core import MARSHMALLOW_VERSION_INFO
 
 from .apps.flask_app import app
-from .common import CommonTestCase
+from webargs.testing import CommonTestCase
 
 
 class TestFlaskParser(CommonTestCase):
diff --git a/tests/test_pyramidparser.py b/tests/test_pyramidparser.py
index 65c1ed49..2f68c7a9 100644
--- a/tests/test_pyramidparser.py
+++ b/tests/test_pyramidparser.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from .common import CommonTestCase
+from webargs.testing import CommonTestCase
 
 
 class TestPyramidParser(CommonTestCase):
diff --git a/tests/common.py b/webargs/testing.py
similarity index 97%
rename from tests/common.py
rename to webargs/testing.py
index 906dd165..935a4786 100644
--- a/tests/common.py
+++ b/webargs/testing.py
@@ -1,4 +1,12 @@
 # -*- coding: utf-8 -*-
+"""Utilities for testing. Includes a base test class
+for testing parsers.
+
+.. warning::
+
+    Methods and functions in this module may change without
+    warning and without a major version change.
+"""
 import json
 
 import pytest