diff --git a/setup.cfg b/setup.cfg
index e6c87c1..2ff4566 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -61,10 +61,10 @@ exclude =
 # `pip install pyscaffoldext-custom-extension[PDF]` like:
 # PDF = ReportLab; RXP
 testing =
-    tox>=4.6.3               # required for system tests
-    pre-commit               # required for system tests
-    setuptools_scm           # required for system tests
-    virtualenv>=20.23.1      # required for system tests
+    tox             # required for system tests
+    pre-commit      # required for system tests
+    setuptools_scm  # required for system tests
+    virtualenv      # required for system tests
     configupdater
     pytest
     pytest-cov