diff --git a/tox.ini b/tox.ini
index 706d1a2..9080ea6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,7 +7,7 @@ setenv =
 
 [testenv:tests]
 deps =
-    git+git://github.com/matrix-org/synapse@rav/mozilla_username_hacks#egg=matrix-synapse
+    matrix-synapse>=1.9.0.dev1
 
 commands =
     python -m unittest discover