diff --git a/.github/workflows/all-tests.yml b/.github/workflows/all-tests.yml
index 93f7b0f5a8..a52c952c1f 100644
--- a/.github/workflows/all-tests.yml
+++ b/.github/workflows/all-tests.yml
@@ -73,7 +73,6 @@ jobs:
         env:
           HDF5_PLUGIN_PATH: ${{ github.workspace }}/hdf5_plugin_path_maxwell
         run: |
-          source ${{ github.workspace }}/test_env/bin/activate
           pytest -m "not sorters_external" --cov=./ --cov-report xml:./coverage.xml -vv -ra --durations=0 | tee report_full.txt; test ${PIPESTATUS[0]} -eq 0 || exit 1
           echo "# Timing profile of full tests" >> $GITHUB_STEP_SUMMARY
           pip install tabulate