diff --git a/.circleci/config.yml b/.circleci/config.yml
index 730f789e91..f6d2ff489c 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -429,6 +429,12 @@ jobs:
   detection-testing:
     executor: content-executor
     steps:
+      - run:
+          name: check for remote fork
+          command: |
+            if [[ ! -z "${CIRCLE_PULL_REQUEST}" &&  ! -z "${CIRCLE_PR_NUMBER}" ]]; then
+                circleci-agent step halt
+            fi
       - run:
           name: checkout repo
           command: |