diff --git a/tox.ini b/tox.ini
index ce7daee90b3..cfe53e3fa72 100644
--- a/tox.ini
+++ b/tox.ini
@@ -268,6 +268,7 @@ setenv =
     local:            HOME={envdir}
     local:            SHARED_CACHE_DIR={toxworkdir}/Caches
     local:            SETENV=:
+    local-nobootstrap: BOOTSTRAP=:
     local-!direct:    PATH=/usr/bin:/bin:/usr/sbin:/sbin
     # brew caches downloaded files in ${HOME}/Library/Caches. We share it between different toxenvs.
     local-homebrew:   HOMEBREW={envdir}/homebrew