diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index 62cebf0..8be427f 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -40,7 +40,7 @@ jobs:
         uses: actions/checkout@v4
       - name: Install missing software
         run: |
-          apt install -y make git singularity
+          sudo apt install -y make git singularity
       # Setup the python environments to use.
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5