diff --git a/roles/tox/README.rst b/roles/tox/README.rst
index fe157eda3..c7dd505af 100644
--- a/roles/tox/README.rst
+++ b/roles/tox/README.rst
@@ -44,7 +44,7 @@ corresponding Zuul sibling projects and runs tox tests as follows:
    command-line option if set.
 
 .. zuul:rolevar:: tox_extra_args
-   :default: -vv
+   :default: -vv --skip-missing-interpreters=false
 
    String of extra command line options to pass to tox.