diff --git a/.github/workflows/data-cicd.yml b/.github/workflows/data-cicd.yml
index 8627c4bd7..4c2fb132b 100644
--- a/.github/workflows/data-cicd.yml
+++ b/.github/workflows/data-cicd.yml
@@ -23,10 +23,13 @@ jobs:
       - name: setup uv
         run: curl -LsSf https://astral.sh/uv/install.sh | sh
       - name: Install dependencies
+        # activating and deactiviating because of https://stackoverflow.com/questions/35045038/how-do-i-use-pytest-with-virtualenv
         run: |
           uv venv
           source .venv/bin/activate
           uv pip install -r data/requirements.txt -r requirements-dev.txt
+          deactivate
+          source .venv/bin/activate
       - run: pytest data
   #type-check:
   #  runs-on: ubuntu-latest
@@ -39,10 +42,13 @@ jobs:
   #    - name: setup uv
   #      run: curl -LsSf https://astral.sh/uv/install.sh | sh
   #    - name: Install dependencies
+  #      # activating and deactiviating because of https://stackoverflow.com/questions/35045038/how-do-i-use-pytest-with-virtualenv
   #      run: |
   #        uv venv
   #        source .venv/bin/activate
   #        uv pip install -r data/requirements.txt -r requirements-dev.txt
+  #        deactivate
+  #        source .venv/bin/activate
   #    - name: Run mypy
   #      run: mypy --strict data
   data-build:
diff --git a/.github/workflows/linting.yml b/.github/workflows/linting.yml
index cec94e21f..68586afd8 100644
--- a/.github/workflows/linting.yml
+++ b/.github/workflows/linting.yml
@@ -28,10 +28,13 @@ jobs:
       - name: setup uv
         run: curl -LsSf https://astral.sh/uv/install.sh | sh
       - name: Install python dependencies
+        # activating and deactiviating because of https://stackoverflow.com/questions/35045038/how-do-i-use-pytest-with-virtualenv
         run: |
           uv venv
           source .venv/bin/activate
           uv pip install -r data/requirements.txt -r requirements-dev.txt
+          deactivate
+          source .venv/bin/activate
       - name: Run pre-commit
         continue-on-error: ${{ github.ref == 'refs/heads/main' }}
         uses: pre-commit/action@v3.0.1
diff --git a/.github/workflows/update-data.yml b/.github/workflows/update-data.yml
index 74f2cf880..0d3d9c246 100644
--- a/.github/workflows/update-data.yml
+++ b/.github/workflows/update-data.yml
@@ -25,10 +25,13 @@ jobs:
       - name: setup uv
         run: curl -LsSf https://astral.sh/uv/install.sh | sh
       - name: Install python dependencies
+        # activating and deactiviating because of https://stackoverflow.com/questions/35045038/how-do-i-use-pytest-with-virtualenv
         run: |
           uv venv
           source .venv/bin/activate
           uv pip install -r data/requirements.txt -r requirements-dev.txt
+          deactivate
+          source .venv/bin/activate
       - name: Download data
         continue-on-error: true # a PR deleting all data will be created if this fails => fail obvious
         run: |