diff --git a/.github/workflows/scheduled.yml b/.github/workflows/scheduled.yml
index 9032f2cc..f5251238 100644
--- a/.github/workflows/scheduled.yml
+++ b/.github/workflows/scheduled.yml
@@ -25,6 +25,7 @@ jobs:
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           fetch-depth: 0
+          persist-credentials: false
           ref: ${{ github.event.pull_request.head.sha }}
 
       - name: Set up Homebrew
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 33ee4ca6..84881fff 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -15,6 +15,8 @@ jobs:
     steps:
       - name: Set up Git repository
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
 
       - name: Set up Homebrew
         id: set-up-homebrew