diff --git a/demo/karma.yaml b/demo/karma.yaml
index 1f69348a71..0ea19588ff 100644
--- a/demo/karma.yaml
+++ b/demo/karma.yaml
@@ -61,6 +61,9 @@ jira:
   - regex: DEVOPS-[0-9]+
     uri: https://jira.example.com
 silenceForm:
+  populate_from_header:
+    header: "CF-RAY"
+    value_re: "^(.+)$"
   strip:
     labels:
       - job