diff --git a/MANIFEST.in b/MANIFEST.in
index 085afd7..cbcb0ed 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,3 +1,2 @@
 include README.rst AUTHORS.txt LICENSE
 recursive-include anymail *.py
-prune anymail/tests
diff --git a/docs/contributing.rst b/docs/contributing.rst
index 59eb13a..1371071 100644
--- a/docs/contributing.rst
+++ b/docs/contributing.rst
@@ -78,6 +78,6 @@ get from from environment variables. Look in the ``*_integration_tests.py``
 files in the `tests source`_ for specific requirements.
 
 .. _.travis.yml: https://github.com/anymail/django-anymail/blob/master/.travis.yml
-.. _tests source: https://github.com/anymail/django-anymail/blob/master/anymail/tests
+.. _tests source: https://github.com/anymail/django-anymail/blob/master/tests
 .. _mock: http://www.voidspace.org.uk/python/mock/index.html
 .. _tested on Travis: https://travis-ci.org/anymail/django-anymail
diff --git a/runtests.py b/runtests.py
index 98b8f77..6d6f50a 100644
--- a/runtests.py
+++ b/runtests.py
@@ -52,7 +52,7 @@ except ImportError:
 
 def runtests(*args):
     test_runner = TestRunner(verbosity=1)
-    test_labels = args if len(args) > 0 else [APP]
+    test_labels = args if len(args) > 0 else ['tests']
     failures = test_runner.run_tests(test_labels)
     sys.exit(failures)
 
diff --git a/anymail/tests/__init__.py b/tests/__init__.py
similarity index 100%
rename from anymail/tests/__init__.py
rename to tests/__init__.py
diff --git a/anymail/tests/mock_requests_backend.py b/tests/mock_requests_backend.py
similarity index 100%
rename from anymail/tests/mock_requests_backend.py
rename to tests/mock_requests_backend.py
diff --git a/anymail/tests/sample_image.png b/tests/sample_image.png
similarity index 100%
rename from anymail/tests/sample_image.png
rename to tests/sample_image.png
diff --git a/anymail/tests/test_mailgun_backend.py b/tests/test_mailgun_backend.py
similarity index 100%
rename from anymail/tests/test_mailgun_backend.py
rename to tests/test_mailgun_backend.py
diff --git a/anymail/tests/test_mailgun_integration.py b/tests/test_mailgun_integration.py
similarity index 100%
rename from anymail/tests/test_mailgun_integration.py
rename to tests/test_mailgun_integration.py
diff --git a/anymail/tests/test_mandrill_backend.py b/tests/test_mandrill_backend.py
similarity index 100%
rename from anymail/tests/test_mandrill_backend.py
rename to tests/test_mandrill_backend.py
diff --git a/anymail/tests/test_mandrill_djrill_features.py b/tests/test_mandrill_djrill_features.py
similarity index 100%
rename from anymail/tests/test_mandrill_djrill_features.py
rename to tests/test_mandrill_djrill_features.py
diff --git a/anymail/tests/test_mandrill_integration.py b/tests/test_mandrill_integration.py
similarity index 100%
rename from anymail/tests/test_mandrill_integration.py
rename to tests/test_mandrill_integration.py
diff --git a/anymail/tests/test_mandrill_webhook.py b/tests/test_mandrill_webhook.py
similarity index 100%
rename from anymail/tests/test_mandrill_webhook.py
rename to tests/test_mandrill_webhook.py
diff --git a/anymail/tests/test_postmark_backend.py b/tests/test_postmark_backend.py
similarity index 100%
rename from anymail/tests/test_postmark_backend.py
rename to tests/test_postmark_backend.py
diff --git a/anymail/tests/test_postmark_integration.py b/tests/test_postmark_integration.py
similarity index 100%
rename from anymail/tests/test_postmark_integration.py
rename to tests/test_postmark_integration.py
diff --git a/anymail/tests/test_sendgrid_backend.py b/tests/test_sendgrid_backend.py
similarity index 100%
rename from anymail/tests/test_sendgrid_backend.py
rename to tests/test_sendgrid_backend.py
diff --git a/anymail/tests/test_sendgrid_integration.py b/tests/test_sendgrid_integration.py
similarity index 100%
rename from anymail/tests/test_sendgrid_integration.py
rename to tests/test_sendgrid_integration.py
diff --git a/anymail/tests/utils.py b/tests/utils.py
similarity index 100%
rename from anymail/tests/utils.py
rename to tests/utils.py