diff --git a/setup.py b/setup.py
index 5f89a58..00b7c88 100644
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,6 @@ def long_description():
             "pytest",
             "pytest-xdist",
             "packaging",
-            "virtualenv<20.22",  # pin required for tests with Python 3.6 envs
         ],
     },
     python_requires=">=3.6",
diff --git a/tox.ini b/tox.ini
index f117266..35a9778 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,6 +9,7 @@ extras =
     tests
 deps=
     tox3: tox < 4
+    tox3: virtualenv < 20.22
     tox4: tox >=4.0.15,< 5
 commands =
     pytest -v {posargs} tests