diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index ef32dc1..be5150f 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -2,8 +2,8 @@ name: Run tests
 
 on:
   workflow_dispatch:
-  pull_request_target:
-    types: [assigned, opened, synchronize, reopened]
+  pull_request:
+    types: [opened, synchronize, reopened]
 
 jobs:
   build:
@@ -15,8 +15,6 @@ jobs:
         node-version: [16.x]
     steps:
       - uses: actions/checkout@v2
-        with:
-          ref: ${{ github.event.pull_request.head.sha }}
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v1
         with: