diff --git a/.github/workflows/python-app.yml b/.github/workflows/python-app.yml
index 20c7d73..f554712 100644
--- a/.github/workflows/python-app.yml
+++ b/.github/workflows/python-app.yml
@@ -30,15 +30,18 @@ jobs:
       - name: Create environment
         id: create_env
         run: |
-          pip install uv
           uv venv --python 3.11 .venv_lint
           source .venv_lint/bin/activate
 
       - name: Install Ruff
-        run: uv pip install ruff
+        run: |
+          source .venv_lint/bin/activate
+          uv pip install ruff
 
       - name: Run Ruff
-        run: ruff check src/ --output-format=github
+        run: |
+          source .venv_lint/bin/activate
+          ruff check src/ --output-format=github
 
       - name: Remove environment
         if: always()
@@ -68,22 +71,25 @@ jobs:
       - name: Create environment
         id: create_env
         run: |
-          pip install uv
           uv venv --python 3.11 .venv_pytest
           source .venv_pytest/bin/activate
         
       - name: Install dependencies
         run: |
+          source .venv_pytest/bin/activate
           uv pip install --upgrade pip
           uv pip install pytest
           uv pip install -r requirements.txt
           uv pip install -e .
 
       - name: List build environment
-        run: uv pip list
+        run: |
+          source .venv_pytest/bin/activate
+          uv pip list
 
       - name: Test with pytest
         run: |
+          source .venv_pytest/bin/activate
           echo $(which python)
           cd tests
           pytest -s --high-tol