diff --git a/tox.ini b/tox.ini
index ce279088e..6a7d44969 100644
--- a/tox.ini
+++ b/tox.ini
@@ -97,7 +97,9 @@ commands =
 description = Run apacheconftest with pebble and Certbot outside of tox's virtual environment.
 
 [testenv:apacheconftest-with-pebble]
-deps = {[testenv:apacheconftest]deps}
+deps =
+    {[testenv:apacheconftest]deps}
+    {[testenv:apacheconftest-external-with-pebble]deps}
 commands = {[testenv:apacheconftest-external-with-pebble]commands}
 
 [testenv:nginxroundtrip]