diff --git a/tests/settings.py b/tests/settings.py
index daeb3e5..484bf2e 100644
--- a/tests/settings.py
+++ b/tests/settings.py
@@ -1,3 +1,5 @@
+import os
+
 LANGUAGE_CODE = 'en-us'
 TIME_ZONE = 'UTC'
 
@@ -5,4 +7,11 @@ INSTALLED_APPS += (
     'passerelle_montpellier_encombrants',
 )
 
-
+DATABASES = {
+    'default': {
+        'ENGINE': os.environ.get('DB_ENGINE', 'django.db.backends.sqlite3'),
+        'TEST': {
+            'NAME': 'passerelle-montpellier-encombrants-test-%s' % os.environ.get('BRANCH_NAME', '').replace('/', '-')[:63],
+        },
+    }
+}
diff --git a/tox.ini b/tox.ini
index 94ab9c5..b3b2b07 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,10 +9,12 @@ usedevelop =
 setenv =
   DJANGO_SETTINGS_MODULE=passerelle.settings
   PASSERELLE_SETTINGS_FILE=tests/settings.py
+  DB_ENGINE=django.db.backends.postgresql_psycopg2
   coverage: COVERAGE=--cov-report xml --cov-report html --cov=passerelle_montpellier_encombrants/
   junit: JUNIT=--junitxml=junit-{envname}.xml
 deps =
   http://git.entrouvert.org/passerelle.git/snapshot/passerelle-master.tar.gz
+  psycopg2-binary
   xmlschema<1.1
   psycopg2
   pytest