diff --git a/.github/workflows/flake8.yml b/.github/workflows/flake8.yml
new file mode 100644
index 0000000..9a5bd54
--- /dev/null
+++ b/.github/workflows/flake8.yml
@@ -0,0 +1,25 @@
+# https://github.com/marketplace/actions/flake8-annotate-action
+
+name: Flake8 Lint
+"on": ["push"]
+
+jobs:
+  flake8:
+    name: Flake8 tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - uses: gijswobben/flake8-action@main
+        with:
+          strict: true
+          strict_for: "E501"
+          not_strict_for: "E502,E503"
+          message_title: "Flake8 error found"
+          flake8_config: |
+            [flake8]
+            exclude = examples/ tests/
+            max-line-length = 120
+            extend-ignore =
+                # See https://github.com/PyCQA/pycodestyle/issues/373
+                E203,
+          additional_packages: pep8-naming==0.13.2 flake8-annotations==2.9.1 darglint==1.8.1 flake8-bugbear==22.10.27
diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
deleted file mode 100644
index 1b85a0f..0000000
--- a/.github/workflows/python-package.yml
+++ /dev/null
@@ -1,40 +0,0 @@
-# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
-# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
-
-name: Python package
-
-on:
-  push:
-    branches: [ "main" ]
-  pull_request:
-    branches: [ "main" ]
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
-
-    steps:
-    - uses: actions/checkout@v4
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        python -m pip install flake8 pytest
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
-    - 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
-        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
-    - name: Test with pytest
-      run: |
-        pytest
diff --git a/__pycache__/subtotxt.cpython-310-pytest-8.3.2.pyc b/__pycache__/subtotxt.cpython-310-pytest-8.3.2.pyc
new file mode 100644
index 0000000..5205006
Binary files /dev/null and b/__pycache__/subtotxt.cpython-310-pytest-8.3.2.pyc differ
diff --git a/pyproject.toml b/pyproject.toml
index 23650bc..1a7ad54 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,4 +21,11 @@ exclude = '''
   | venv
   | test/resources
 )/
-'''
\ No newline at end of file
+'''
+
+[tool.pytest.ini_options]
+minversion = "6.0"
+addopts = "-ra -q"
+testpaths = [
+    "tests"
+]
\ No newline at end of file
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..0519ecb
--- /dev/null
+++ b/tests/__init__.py
@@ -0,0 +1 @@
+ 
\ No newline at end of file