diff --git a/.travis.yml b/.travis.yml
index 78a7e2e30..25532e898 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -50,7 +50,7 @@ before_script:
 script:
   - python ./tests.py
   - cd test_project
-  - coverage run --source ../modoboa manage.py test modoboa.core modoboa.lib modoboa.admin modoboa.limits modoboa.transport modoboa.relaydomains modoboa.dnstools modoboa.ldapsync modoboa.policyd
+  - coverage run --concurrency=multiprocessing --source ../modoboa manage.py test modoboa.core modoboa.lib modoboa.admin modoboa.limits modoboa.transport modoboa.relaydomains modoboa.dnstools modoboa.ldapsync modoboa.policyd
 
 after_success:
   - coverage xml