diff --git a/.github/workflows/ci-test-tlm.yml b/.github/workflows/ci-test-tlm.yml
index babd5554..b626fa67 100644
--- a/.github/workflows/ci-test-tlm.yml
+++ b/.github/workflows/ci-test-tlm.yml
@@ -22,7 +22,11 @@ jobs:
           - "3.11"
           - "3.12"
     steps:
-      - uses: actions/checkout@v2
+      - name: Check out latest commit
+        if: ${{ github.event.issue.pull_request }}
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.ref }}
       - name: Set up Python ${{ matrix.python }}
         uses: actions/setup-python@v2
         with:
@@ -54,7 +58,11 @@ jobs:
         python:
           - "3.11"
     steps:
-      - uses: actions/checkout@v2
+      - name: Check out latest commit
+        if: ${{ github.event.issue.pull_request }}
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.ref }}
       - name: Set up Python ${{ matrix.python }}
         uses: actions/setup-python@v2
         with:
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 003c7314..01002e30 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,6 +10,11 @@ jobs:
     name: Type check
     runs-on: ubuntu-latest
     steps:
+      - name: Check out latest commit
+        if: ${{ github.event.issue.pull_request }}
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.ref }}
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with: