diff --git a/test/service/activity/comment_test.exs b/test/service/activity/comment_test.exs
index 5e4ae6233..c4f457d16 100644
--- a/test/service/activity/comment_test.exs
+++ b/test/service/activity/comment_test.exs
@@ -11,7 +11,7 @@ defmodule Mobilizon.Service.Activity.CommentTest do
   alias Mobilizon.Service.Workers.LegacyNotifierBuilder
   alias Mobilizon.Users.User
 
-  use Mobilizon.DataCase, async: true
+  use Mobilizon.DataCase
   use Oban.Testing, repo: Mobilizon.Storage.Repo
   import Mobilizon.Factory
 
diff --git a/test/service/activity/discussion_test.exs b/test/service/activity/discussion_test.exs
index e36ead866..31305d921 100644
--- a/test/service/activity/discussion_test.exs
+++ b/test/service/activity/discussion_test.exs
@@ -10,7 +10,7 @@ defmodule Mobilizon.Service.Activity.DiscussionTest do
   alias Mobilizon.Service.Workers.{ActivityBuilder, LegacyNotifierBuilder}
   alias Mobilizon.Users.User
 
-  use Mobilizon.DataCase, async: true
+  use Mobilizon.DataCase
   use Oban.Testing, repo: Mobilizon.Storage.Repo
   import Mobilizon.Factory
 
diff --git a/test/service/export/icalendar_test.exs b/test/service/export/icalendar_test.exs
index 2d20e449e..2c6dd3676 100644
--- a/test/service/export/icalendar_test.exs
+++ b/test/service/export/icalendar_test.exs
@@ -1,5 +1,5 @@
 defmodule Mobilizon.Service.ICalendarTest do
-  use Mobilizon.DataCase, async: true
+  use Mobilizon.DataCase
 
   import Mobilizon.Factory
 
diff --git a/test/service/export/participants/common_test.exs b/test/service/export/participants/common_test.exs
index df132df5b..830772866 100644
--- a/test/service/export/participants/common_test.exs
+++ b/test/service/export/participants/common_test.exs
@@ -1,5 +1,5 @@
 defmodule Mobilizon.Service.Export.Participants.CommonTest do
-  use Mobilizon.DataCase, async: true
+  use Mobilizon.DataCase
 
   import Mobilizon.Factory
 
diff --git a/test/test_helper.exs b/test/test_helper.exs
index e0baa23b9..732066cd4 100644
--- a/test/test_helper.exs
+++ b/test/test_helper.exs
@@ -2,5 +2,3 @@
 ExUnit.configure(formatters: [JUnitFormatter, ExUnit.CLIFormatter, ExUnitNotifier])
 
 ExUnit.start()
-
-Ecto.Adapters.SQL.Sandbox.mode(Mobilizon.Storage.Repo, :manual)