diff --git a/runtests.sh b/runtests.sh
index ff4d78b3a..b3c7c1ecf 100755
--- a/runtests.sh
+++ b/runtests.sh
@@ -20,6 +20,7 @@ fi
 
 # Run unittests and coverage report
 coverage erase
-time coverage run manage.py test --noinput --keepdb "$@"
+time coverage run --concurrency=multiprocessing manage.py test --noinput --keepdb --parallel "$@"
+coverage combine
 coverage report -m
 coverage html