poke test again (#360)

## Summary
<!--- This is a required section; please describe the main purpose of
this proposed code change. --->

<!---
## Details
This is an optional section; is there anything specific that reviewers
should be aware of?
--->

## Testing Done
<!--- This is a required section; please describe how this change was
tested. --->

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Complete the following tasks before sending your PR, and replace `[ ]`
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- Hardware Type: <BLANK>
- [ ] run `make test` to ensure correctness
- [ ] run `make checkstyle` to ensure code style
- [ ] run `make test-convergence` to ensure convergence

.github/workflows/ci.yml

@@ -1,5 +1,4 @@
 name: GitHub Actions CI
-
 on:
   push:
     branches:
@@ -16,28 +15,28 @@ on:
       - "test/**"
 
 concurrency:
-  # This causes it to cancel previous in-progress actions on the same PR / branch,
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true
 
 jobs:
   checkstyle:
     runs-on: ubuntu-latest
-
     steps:
     - name: Checkout code
       uses: actions/checkout@v3
-
+      with:
+        # Check out PR code instead of base branch
+        ref: ${{ github.event.pull_request.head.sha }}
+        # Required when using pull_request_target
+        github-token: ${{ secrets.GITHUB_TOKEN }}
     - name: Set up Python
       uses: actions/setup-python@v3
       with:
         python-version: '3.10'
-
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
         pip install flake8 isort black
-
     - name: Run checkstyle
       run: make checkstyle
 
@@ -47,21 +46,22 @@ jobs:
     env:
       MODAL_TOKEN_ID: ${{ secrets.MODAL_TOKEN_ID }}
       MODAL_TOKEN_SECRET: ${{ secrets.MODAL_TOKEN_SECRET }}
-
     steps:
     - name: Checkout code
       uses: actions/checkout@v3
-
+      with:
+        # Check out PR code instead of base branch
+        ref: ${{ github.event.pull_request.head.sha }}
+        # Required when using pull_request_target
+        github-token: ${{ secrets.GITHUB_TOKEN }}
     - name: Set up Python
       uses: actions/setup-python@v3
       with:
         python-version: '3.10'
-
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
         pip install modal
-
     - name: Run unit tests
       run: |
-        modal run dev.modal.tests
+        modal run dev.modal.tests