diff --git a/global/overlay/etc/puppet/cosmos-rules.yaml b/global/overlay/etc/puppet/cosmos-rules.yaml
index b308035..8f73e12 100644
--- a/global/overlay/etc/puppet/cosmos-rules.yaml
+++ b/global/overlay/etc/puppet/cosmos-rules.yaml
@@ -17,6 +17,7 @@
   cdn::runner:
 
 '^internal-.+-test-mqtt-[0-9]+\.cdn\.sunet\.se$':
+  cdn::ca_trust:
   cdn::mqtt:
     dc: tug
     clients: