diff --git a/tox.ini b/tox.ini
index 41cc2d807..67bd00698 100644
--- a/tox.ini
+++ b/tox.ini
@@ -134,7 +134,7 @@ commands =
 basepython = python3
 commands =
     {[base]install_packages}
-    {[base]pip_install} .[dev3]
+    {[base]pip_install} certbot[dev3]
     mypy {[base]source_paths}
 
 [testenv:apacheconftest]