diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 52ad7e1..24da3dc 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -15,7 +15,7 @@ jobs:
 
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: conda-incubator/setup-miniconda@v2
       with:
         miniforge-variant: Mambaforge
@@ -23,11 +23,11 @@ jobs:
         channel-priority: strict
         environment-file: .ci_support/environment.yml
         python-version: ${{ matrix.python-version }}
-        use-only-tar-bz2: true # IMPORTANT: This needs to be set for caching to work properly!
-
+        use-only-tar-bz2: true
 
     - name: run tests
       shell: bash -l {0}
       run: |
         pip install -e .
         python -m unittest discover tests/
+