1 files changed, 1 insertions, 1 deletions
diff --git a/tox.ini b/tox.ini
index 9c64629..bd9e5d7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,7 +9,7 @@ deps = -r{toxinidir}/requirements.txt
 commands =
   python tools/patch_tox_venv.py
   # due to dependencies between tests (bug 1192207) we use `--concurrency=1` option
-  python setup.py testr --slowest --testr-args='--subunit --concurrency=1 {posargs}'
+  python setup.py testr --slowest --testr-args='--concurrency=1 {posargs}'
 
 [flake8]
 show-source = True