Pin to old versions of pytest as workaround for man-group/pytest-plugins#110.

jaraco · jaraco · commit bb634f958c16 · 2019-02-13T19:38:49.000-05:00
diff --git a/tox.ini b/tox.ini
@@ -5,6 +5,8 @@ minversion = 2.4
 [testenv]
 deps =
 	setuptools>=31.0.1
+	# workaround for https://github.com/manahl/pytest-plugins/issues/110
+	pytest < 4
 commands =
 	pytest {posargs}
 usedevelop = True
