diff --git a/mbed-tls-restricted-pr-ci-testing.yaml b/mbed-tls-restricted-pr-ci-testing.yaml
index 2890767..b05b97b 100644
--- a/mbed-tls-restricted-pr-ci-testing.yaml
+++ b/mbed-tls-restricted-pr-ci-testing.yaml
@@ -53,7 +53,7 @@
         branch-discovery: all
         discover-pr-origin: both
         discover-pr-forks-strategy: both
-        discover-pr-forks-trust: permission
+        discover-pr-forks-trust: nobody
         head-filter-regex: 'PR-7959-(head|merge)|gh-readonly-queue/dev/bensze01/merge-queue-test/.*'
         status-checks:
           skip: true