diff --git a/.github/workflows/ci_tests.yml b/.github/workflows/ci_tests.yml
index 158ab94..dbe302b 100644
--- a/.github/workflows/ci_tests.yml
+++ b/.github/workflows/ci_tests.yml
@@ -41,7 +41,7 @@ jobs:
       - name: Create virtual env
         run: python3 -m venv venv --upgrade-deps
       - name: Install pyaro
-        run: venv/bin/activate && pip install ./
+        run: source venv/bin/activate && pip install ./
       - name: Try importing pyaro
-        run: venv/bin/activate && python -c "import pyaro; print(pyaro.__version__)"
+        run: source venv/bin/activate && python -c "import pyaro; print(pyaro.__version__)"