diff --git a/tox.ini b/tox.ini
index 428ef50..c81dfd4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,7 +3,7 @@
 # test suite on all supported python versions. To use it, "pip install tox"
 # and then run "tox" from this directory.
 [tox]
-toxworkdir = {env:TMPDIR:/tmp}/tox-{env:USER}/hobo
+toxworkdir = {env:TMPDIR:/tmp}/tox-{env:USER}/hobo/{env:BRANCH_NAME:}
 envlist = coverage-{authentic,hobo,multipublik,multitenant,multitenant-oldstylemiddleware,passerelle,schemas},
 
 [testenv]