diff --git a/setup.py b/setup.py
index 45e7baf..68f43af 100644
--- a/setup.py
+++ b/setup.py
@@ -54,7 +54,6 @@
     extras_require['all'].extend(reqs)
 
 setup_requires = [
-    'pytest-runner>=2.7',
     'setuptools_scm>=3.1.0',
 ]
 
@@ -93,7 +92,6 @@
     python_requires='>=3.5',
     extras_require=extras_require,
     setup_requires=setup_requires,
-    tests_require=tests_require,
     classifiers=[
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.5',
diff --git a/tox.ini b/tox.ini
index f185675..a95022f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,8 +12,9 @@ envlist = py35, py36, py37, py38, py39
 
 [testenv]
 extras = numpy, tests
+deps = pytest
 commands =
     {envpython} -m check_manifest --ignore ".*-requirements.txt"
     {envpython} -m sphinx.cmd.build -qnNW docs docs/_build/html
-    {envpython} setup.py test
+    {envpython} -m pytest {posargs}
     {envpython} -m sphinx.cmd.build -qnNW -b doctest docs docs/_build/doctest