diff --git a/.github/workflows/test_mca.yaml b/.github/workflows/test_mca.yaml
index 9cd8d0a..547fa25 100644
--- a/.github/workflows/test_mca.yaml
+++ b/.github/workflows/test_mca.yaml
@@ -23,6 +23,8 @@ jobs:
         python -m pip install --upgrade pip
         pip install -r requirements.txt
 
+    - name: Set PYTHONPATH
+      run: echo "PYTHONPATH=$PYTHONPATH:$(pwd)/src" >> $GITHUB_ENV
+
     - name: Run test_mca.py
-      run: |
-        python tests/test_mca.py
\ No newline at end of file
+      run: python tests/test_mca.py
\ No newline at end of file