diff --git a/tox.ini b/tox.ini
index 8269fa4..857802f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-toxworkdir = {env:TMPDIR:/tmp}/tox-{env:USER}/wcs-olap/
+toxworkdir = {env:TMPDIR:/tmp}/tox-{env:USER}/wcs-olap/{env:BRANCH_NAME:}
 envlist = coverage
 
 [testenv]