diff --git a/dev_requirements.txt b/dev_requirements.txt
index f6555a6..b9879c5 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -24,4 +24,4 @@ certifi
 #        (also remove in setup.py)
 ddt==1.3.1
 mock
-pytest # optional (python setup.py test works without it), but possible nonetheless
+pytest
diff --git a/setup.py b/setup.py
index a8eb7de..18c64cf 100644
--- a/setup.py
+++ b/setup.py
@@ -61,7 +61,7 @@ setup(
     ],
 
     test_suite='tests',
-    tests_require=['pyfakefs>=3.4', 'mock', 'ddt==1.3.1', 'certifi'],
+    tests_require=['pyfakefs>=3.4', 'mock', 'ddt==1.3.1', 'certifi', 'pytest'],
 
     # in order to avoid 'zipimport.ZipImportError: bad local file header'
     zip_safe=False,