diff --git a/Jenkinsfile b/Jenkinsfile
index 8a4f6511..dcc0bbd0 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -6,10 +6,14 @@ pipeline {
         disableConcurrentBuilds()
         timeout(time: 30, unit: 'MINUTES')
     }
+    environment {
+        max = 100000
+        RAND_TEST = "${Math.abs(new Random().nextInt(max+1))}"
+    }
     stages {
         stage('Unit Tests') {
             steps {
-                sh 'NUMPROCESSES=6 tox -rv '
+                sh "NUMPROCESSES=6 RAND_TEST=${env.RAND_TEST} tox -rv"
             }
             post {
                 always {
diff --git a/tests/settings.py b/tests/settings.py
index ec546d35..6ae60faa 100644
--- a/tests/settings.py
+++ b/tests/settings.py
@@ -65,7 +65,7 @@ DATABASES = {
     'default': {
         'ENGINE': 'django.db.backends.postgresql_psycopg2',
         'TEST': {
-            'NAME': ('passerelle-test-%s' % os.environ.get("BRANCH_NAME", "").replace('/', '-'))[:58],
+            'NAME': ('passerelle-test-%s' % os.environ.get("RAND_TEST", "")),
         },
     }
 }
diff --git a/tox.ini b/tox.ini
index 33d96511..8aeef58a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-toxworkdir = {env:TMPDIR:/tmp}/tox-{env:USER}/passerelle/{env:BRANCH_NAME:}
+toxworkdir = {env:TMPDIR:/tmp}/tox-{env:USER}/passerelle/{env:RAND_TEST:}
 envlist = py3-django32-xmlschema14-codestyle-coverage,py3-django22-xmlschema10,pylint
 
 [testenv]
@@ -7,7 +7,7 @@ usedevelop = True
 setenv =
   DJANGO_SETTINGS_MODULE=passerelle.settings
   PASSERELLE_SETTINGS_FILE=tests/settings.py
-  BRANCH_NAME={env:BRANCH_NAME:}
+  RAND_TEST={env:RAND_TEST:}
   WCSCTL=wcs/wcsctl.py
   SETUPTOOLS_USE_DISTUTILS=stdlib
   NUMPROCESSES={env:NUMPROCESSES:1}
@@ -69,7 +69,6 @@ filterwarnings = default
 setenv =
   DJANGO_SETTINGS_MODULE=passerelle.settings
   PASSERELLE_SETTINGS_FILE=tests/settings.py
-  BRANCH_NAME={env:BRANCH_NAME:}
   SETUPTOOLS_USE_DISTUTILS=stdlib
   NUMPROCESSES={env:NUMPROCESSES:6}
 deps =