Try to fix normal tests.

.github/workflows/tests.yml

@@ -10,26 +10,32 @@ jobs:
   build:
     runs-on: ubuntu-latest
     strategy:
+      fail-fast: false
       matrix:
         python-version: ["3.7", "3.8", "3.9", "3.10"]
     steps:
     - uses: actions/checkout@v2
+
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
+
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip wheel
         python -m pip install -r requirements.txt
         python -m pip install -r requirements_test.txt
+
     - name: Installing Python TA-Lib
       run: |
         python setup.py install
+
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names
         flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+
     - name: Test with pytest
       run: |
-        PYTHONPATH=. pytest
+        python -m pytest tests