diff --git a/setup.cfg b/setup.cfg
index ca1e6df..a4ddd05 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -36,6 +36,8 @@ setup_requires =
     # not conforming to semantic versioning, but it succeed with tags as
     # `2.2.0-rc0`.
     setuptools_scm
-tests_require =
+[options.extras_require]
+# To install these dependencies, run pip install .[test]
+test =
     pytest
     tox