diff --git a/docs/config.rst b/docs/config.rst
index a98f42089..f3bb1b12e 100644
--- a/docs/config.rst
+++ b/docs/config.rst
@@ -497,7 +497,9 @@ Complete list of settings that you can put into ``testenv*`` sections:
     .. versionadded:: 3.10
 
     Set to ``true`` if you want virtualenv to upgrade pip/wheel/setuptools to
-    the latest version.
+    the latest version. If (and only if) you want to choose a specific version
+    (not necessarily the latest) then you can add e.g. ``VIRTUALENV_PIP=20.3.3``
+    to your setenv.
 
 .. conf:: args_are_paths ^ true|false ^ true