diff --git a/tox.ini b/tox.ini
index 0bd085975..4818a7998 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,9 +17,9 @@ commands =
     nosetests -v acme
     pip install -r requirements.txt -e .[testing]
     nosetests -v letsencrypt
-    pip install letsencrypt-apache
+    pip install -e letsencrypt-apache
     nosetests -v letsencrypt_apache
-    pip install letsencrypt-nginx
+    pip install -e letsencrypt-nginx
     nosetests -v letsencrypt_nginx
 
 setenv =