diff --git a/.github/workflows/lint-markdown.yaml b/.github/workflows/lint-markdown.yaml
index 21c07fe..771134d 100644
--- a/.github/workflows/lint-markdown.yaml
+++ b/.github/workflows/lint-markdown.yaml
@@ -27,6 +27,8 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - name: Set up Ruby
         # See https://github.com/ruby/setup-ruby#versioning
diff --git a/.github/workflows/lint-yaml.yaml b/.github/workflows/lint-yaml.yaml
index 6afcef1..5b02279 100644
--- a/.github/workflows/lint-yaml.yaml
+++ b/.github/workflows/lint-yaml.yaml
@@ -27,10 +27,13 @@ jobs:
   lintYaml:
     runs-on: ubuntu-latest
     timeout-minutes: 15
- 
+
     steps:
-      - name: Checkout repository
+      - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
       - name: Check YAML files with linter
         uses: ibiqlik/action-yamllint@v3
         with:
diff --git a/.github/workflows/test_macos_1.yml b/.github/workflows/test_macos_1.yml
index e42122a..b294de4 100644
--- a/.github/workflows/test_macos_1.yml
+++ b/.github/workflows/test_macos_1.yml
@@ -28,7 +28,11 @@ jobs:
     timeout-minutes: 15
 
     steps:
-      - uses: actions/checkout@v4
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
       - name: Install coreutils
         run: |
           set -eo pipefail
diff --git a/.github/workflows/test_macos_2.yml b/.github/workflows/test_macos_2.yml
index 35e4107..f61d660 100644
--- a/.github/workflows/test_macos_2.yml
+++ b/.github/workflows/test_macos_2.yml
@@ -26,6 +26,8 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - name: Run Setup new Mac machine script
         run: |
diff --git a/.github/workflows/test_macos_3.yml b/.github/workflows/test_macos_3.yml
index 7e435c0..a195471 100644
--- a/.github/workflows/test_macos_3.yml
+++ b/.github/workflows/test_macos_3.yml
@@ -21,6 +21,9 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
       - name: Run _macos script
         run: |
           set -eo pipefail
diff --git a/.github/workflows/test_macos_4.yml b/.github/workflows/test_macos_4.yml
index 7b8f663..422d1e6 100644
--- a/.github/workflows/test_macos_4.yml
+++ b/.github/workflows/test_macos_4.yml
@@ -26,7 +26,11 @@ jobs:
     timeout-minutes: 15
 
     steps:
-      - uses: actions/checkout@v4
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
       - name: Install new vim
         run: |
           set -eo pipefail
diff --git a/.github/workflows/test_ubuntu.yml b/.github/workflows/test_ubuntu.yml
index 3518124..d76ce42 100644
--- a/.github/workflows/test_ubuntu.yml
+++ b/.github/workflows/test_ubuntu.yml
@@ -29,6 +29,9 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
       - name: Run setup_dotfiles.sh
         run: |
           set -e