diff --git a/.github/workflows/build-pipeline.yml b/.github/workflows/build-pipeline.yml
index 27cd1c6..959bc93 100644
--- a/.github/workflows/build-pipeline.yml
+++ b/.github/workflows/build-pipeline.yml
@@ -8,7 +8,7 @@ on:
       - main
 jobs:
   build:
-    runs-on:  ${{ matrix.os }} 
+    runs-on:  ${{ matrix.os }}
     env:
       PYTHONIOENCODING: "utf8"
     strategy:
@@ -21,7 +21,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version:  ${{ matrix.python-version }} 
+          python-version:  ${{ matrix.python-version }}
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
@@ -29,6 +29,8 @@ jobs:
       - name: Run Linting
         run: |
           ruff check .
+      - name: Set PYTHONPATH_TEST
+        run: echo "PYTHONPATH_TEST=$(pwd)" >> $GITHUB_ENV
       - name: Run Tests
         run: |
           pytest tests/
diff --git a/pyproject.toml b/pyproject.toml
index b587b28..ac40100 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,6 +44,7 @@ Icon = ""
 
 [tool.pytest.ini_options]
 minversion = "8.0"
+pythonpath = "src"
 testpaths = [
     "tests",
 ]