diff --git a/.env b/.env
index f545347..666ff52 100644
--- a/.env
+++ b/.env
@@ -18,6 +18,7 @@ DB_PORT=5432
 # Seed and migrate DB on start
 APP_RUN_SEED=true
 APP_MIGRATE=true
+SQL_SANDBOX=true
 
 # Phoenix endpoint settings
 APP_PORT=4000
diff --git a/config/prod.exs b/config/prod.exs
index 7a6c8e9..7c946a2 100644
--- a/config/prod.exs
+++ b/config/prod.exs
@@ -71,6 +71,9 @@ config :tokenizer_api,
 #
 config :phoenix, :serve_endpoints, true
 
+# Allow to run concurrent acceptance tests on container
+config :tokenizer_api, sql_sandbox: {:system, :boolean, "SQL_SANDBOX", false}
+
 #
 # Alternatively, you can configure exactly which server to
 # start per endpoint:
diff --git a/lib/db/tasks.ex b/lib/db/tasks.ex
index bd8e632..d560bd1 100644
--- a/lib/db/tasks.ex
+++ b/lib/db/tasks.ex
@@ -38,9 +38,8 @@ defmodule :tokenizer_api_tasks do
   end
 
   defp start_repo(repo) do
-    load_app
-    # If you don't include Repo in application supervisor start it here manually
-    # repo.start_link()
+    load_app()
+    repo.start_link()
     repo
   end