diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a82ab84b..c001fc7c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -27,10 +27,10 @@ test:
         - sed -i.bak -E 's;^REDIS_PASSWD = .*$;REDIS_PASSWD = "";' cof/settings/secret.py
         # Remove the old test database if it has not been done yet
         - psql --username=$POSTGRES_USER --host=$DBHOST -c "DROP DATABASE IF EXISTS test_$POSTGRES_DB"
-        - pip install --upgrade -r requirements.txt coverage
+        - pip install --upgrade -r requirements.txt coverage tblib
         - python --version
     script:
-        - coverage run manage.py test
+        - coverage run manage.py test --parallel
     after_script:
         - coverage report
     services:
diff --git a/kfet/open/tests.py b/kfet/open/tests.py
index 75a9bf8a..b4481994 100644
--- a/kfet/open/tests.py
+++ b/kfet/open/tests.py
@@ -1,4 +1,5 @@
 import json
+import threading
 from datetime import timedelta
 from unittest import mock
 
@@ -8,7 +9,7 @@ from django.contrib.auth.models import AnonymousUser, Permission, User
 from django.test import Client
 from django.utils import timezone
 
-from . import OpenKfet, kfet_open
+from . import OpenKfet
 from .consumers import OpenKfetConsumer
 
 
@@ -16,10 +17,10 @@ class OpenKfetTest(ChannelTestCase):
     """OpenKfet object unit-tests suite."""
 
     def setUp(self):
-        self.kfet_open = OpenKfet()
-
-    def tearDown(self):
-        self.kfet_open.clear_cache()
+        self.kfet_open = OpenKfet(
+            cache_prefix="test_kfetopen_%s" % threading.get_ident()
+        )
+        self.addCleanup(self.kfet_open.clear_cache)
 
     def test_defaults(self):
         """Default values."""
@@ -136,8 +137,14 @@ class OpenKfetViewsTest(ChannelTestCase):
         self.c_a = Client()
         self.c_a.login(username="admin", password="admin")
 
-    def tearDown(self):
-        kfet_open.clear_cache()
+        self.kfet_open = OpenKfet(
+            cache_prefix="test_kfetopen_%s" % threading.get_ident()
+        )
+        self.addCleanup(self.kfet_open.clear_cache)
+
+        views_patcher = mock.patch("kfet.open.views.kfet_open", self.kfet_open)
+        views_patcher.start()
+        self.addCleanup(views_patcher.stop)
 
     def test_door(self):
         """Edit raw_status."""
@@ -146,14 +153,14 @@ class OpenKfetViewsTest(ChannelTestCase):
                 "/k-fet/open/raw_open", {"raw_open": sent, "token": "plop"}
             )
             self.assertEqual(200, resp.status_code)
-            self.assertEqual(expected, kfet_open.raw_open)
+            self.assertEqual(expected, self.kfet_open.raw_open)
 
     def test_force_close(self):
         """Edit force_close."""
         for sent, expected in [(1, True), (0, False)]:
             resp = self.c_a.post("/k-fet/open/force_close", {"force_close": sent})
             self.assertEqual(200, resp.status_code)
-            self.assertEqual(expected, kfet_open.force_close)
+            self.assertEqual(expected, self.kfet_open.force_close)
 
     def test_force_close_forbidden(self):
         """Can't edit force_close without kfet.can_force_close permission."""
@@ -236,8 +243,10 @@ class OpenKfetScenarioTest(ChannelTestCase):
         self.r_c_ws = WSClient()
         self.r_c_ws.force_login(self.r)
 
-    def tearDown(self):
-        kfet_open.clear_cache()
+        self.kfet_open = OpenKfet(
+            cache_prefix="test_kfetopen_%s" % threading.get_ident()
+        )
+        self.addCleanup(self.kfet_open.clear_cache)
 
     def ws_connect(self, ws_client):
         ws_client.send_and_consume(
@@ -288,8 +297,8 @@ class OpenKfetScenarioTest(ChannelTestCase):
 
     def test_scenario_2(self):
         """Starting falsely closed, clients connect, disable force close."""
-        kfet_open.raw_open = True
-        kfet_open.force_close = True
+        self.kfet_open.raw_open = True
+        self.kfet_open.force_close = True
 
         msg = self.ws_connect(self.c_ws)
         self.assertEqual(OpenKfet.CLOSED, msg["status"])