Safety first
diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index c95656c..e1fcafe 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -14,8 +14,11 @@
 
     steps:
     - uses: actions/checkout@master
-    - uses: actions/checkout@master   
       with:
+        persist-credentials: false
+    - uses: actions/checkout@master
+      with:
+        persist-credentials: false
         repository: apache/incubator-ponymail-unit-tests
         path: pmtests
     - name: Set up Python ${{ matrix.python-version }}