diff --git a/setup.cfg b/setup.cfg
index 1808227..0114591 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -6,7 +6,7 @@ author = Bruno Renié
 description = A simple yet powerful CloudStack API client for Python and the command-line.
 long_description = file: README.rst
 license = BSD
-license_file = LICENSE
+license_files = LICENSE
 classifiers =
     Intended Audience :: Developers
     Intended Audience :: System Administrators
diff --git a/tox.ini b/tox.ini
index ddc3d88..f3f218b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,6 +18,7 @@ deps=
 	flake8-import-order
 commands =
 	pip install pytest pytest-cache pytest-cov
-	python setup.py test
+	pip wheel --no-deps -w dist .
+	test: pytest -v
 	check-manifest
 	lint: flake8 cs tests.py