diff --git a/docker-compose.yml b/docker-compose.yml
index 2a60d66..3fb069e 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -25,6 +25,8 @@ services:
     - ./docker/home/rails:/home/developer
     - /tmp/.X11-unix:/tmp/.X11-unix
     - ./docker/rails/work_around_docker_fs_bug.rb:/usr/src/app/hitobito/config/initializers/work_around_docker_fs_bug.rb:ro
+    - /etc/timezone:/etc/timezone:ro
+    - /etc/localtime:/etc/localtime:ro
 
   # `exec` into this to execute the tests of the core
   rails_test_core: