diff --git a/.github/workflows/CI_build.yml b/.github/workflows/CI_build.yml
index 85e7fcb..3a35eb2 100644
--- a/.github/workflows/CI_build.yml
+++ b/.github/workflows/CI_build.yml
@@ -32,17 +32,14 @@ jobs:
           poetry lock
           poetry install --with dev
       - name: Show pip list
-        run: |
-          pip list
+        run: poetry run pip list
       - name: Test with coverage
         run: |
           poetry run pytest --cov --cov-report term --cov-report xml --junitxml=xunit-result.xml
       - name: Correct coverage paths
         run: sed -i "s+$PWD/++g" coverage.xml
       - name: Check style against standards using Ruff
-        run: |
-          pip install ruff
-          ruff check .
+        run: poetry run ruff check .
       - name: Check whether import statements are used consistently
         run: poetry run isort . --check-only --diff