diff --git a/.github/workflows/docstring_tests.yml b/.github/workflows/docstring_tests.yml
index d89bf1a..05c593b 100644
--- a/.github/workflows/docstring_tests.yml
+++ b/.github/workflows/docstring_tests.yml
@@ -34,6 +34,7 @@ jobs:
         run: |
           poetry install --with test --all-extras
           poetry add git+https://github.com/AstarVienna/ScopeSim_Data.git
+          poetry env use "$(python -c 'import sys; print(sys.executable)')"
 
       - name: Run Pytest
         shell: bash
diff --git a/.github/workflows/updated_tests.yml b/.github/workflows/updated_tests.yml
index a6d4f48..9e06d4a 100644
--- a/.github/workflows/updated_tests.yml
+++ b/.github/workflows/updated_tests.yml
@@ -43,6 +43,7 @@ jobs:
           poetry lock
           poetry install --with test --all-extras
           poetry add git+https://github.com/AstarVienna/ScopeSim_Data.git
+          poetry env use "$(python -c 'import sys; print(sys.executable)')"
 
       - name: Check Python version
         run: poetry run python -V >> "$GITHUB_STEP_SUMMARY"
diff --git a/.github/workflows/webtests.yml b/.github/workflows/webtests.yml
index 1501113..c90515c 100644
--- a/.github/workflows/webtests.yml
+++ b/.github/workflows/webtests.yml
@@ -38,6 +38,7 @@ jobs:
         run: |
           poetry install --with test --all-extras
           poetry add git+https://github.com/AstarVienna/ScopeSim_Data.git
+          poetry env use "$(python -c 'import sys; print(sys.executable)')"
 
       - name: Check Python version
         run: poetry run python -V >> "$GITHUB_STEP_SUMMARY"