diff --git a/Dockerfile b/Dockerfile
index 0c80b83da..8d6afe8ee 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM elixir:alpine
 
-RUN apk add --no-cache inotify-tools postgresql-client yarn file make gcc libc-dev argon2 imagemagick cmake build-base libwebp-tools bash ncurses git
+RUN apk add --no-cache inotify-tools postgresql-client yarn file make gcc libc-dev argon2 imagemagick cmake build-base libwebp-tools bash ncurses git python3
 
 RUN mix local.hex --force && mix local.rebar --force
 
diff --git a/Makefile b/Makefile
index f0eb6eff6..44a88ef37 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 init:
-	@bash docker/message.sh "start"
+	@bash docker/message.sh "Start"
 	make start
 
 setup: stop
@@ -10,16 +10,16 @@ migrate:
 logs:
 	docker-compose logs -f
 start: stop
-	@bash docker/message.sh "starting Mobilizon with docker"
+	@bash docker/message.sh "Starting Mobilizon with Docker"
 	docker-compose up -d api
-	@bash docker/message.sh "Docker server started."
+	@bash docker/message.sh "Docker server started"
 stop:
-	@bash docker/message.sh "stopping Mobilizon"
+	@bash docker/message.sh "Stopping Mobilizon"
 	docker-compose down
-	@bash docker/message.sh "stopped"
+	@bash docker/message.sh "Mobilizon is stopped"
 test: stop
 	@bash docker/message.sh "Running tests"
-	docker-compose -f docker-compose.yml -f docker-compose.test.yml run api mix test
-	@bash docker/message.sh "Tests runned"
+	docker-compose -f docker-compose.yml -f docker-compose.test.yml run api mix test $(only)
+	@bash docker/message.sh "Done running tests"
 
 target: init
diff --git a/mix.exs b/mix.exs
index fbdf2cecf..ab4276597 100644
--- a/mix.exs
+++ b/mix.exs
@@ -247,6 +247,7 @@ defmodule Mobilizon.Mixfile do
       test: [
         "ecto.create",
         "ecto.migrate",
+        "tz_world.update",
         &run_test/1
       ],
       "phx.deps_migrate_serve": [