diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2827333d..9bb29932 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -69,13 +69,17 @@ jobs:
       - name: Run mypy
         run: poetry run --no-interaction -- mypy --strict --python-version ${{ matrix.python-version }} .
 
-  tox:
+  pytest:
     if: github.event.pull_request.draft == false
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
         python-version: ["3.12", "3.11", "3.10", "3.9", "3.8"]
+    env:
+      OS: ${{ matrix.os }}
+      PYTHON: ${{ matrix.python-version }}
+      COVERAGE_FILE: .coverage.${{ matrix.os }}-${{ matrix.python-version }}
 
     steps:
     - uses: actions/checkout@v4
@@ -85,69 +89,27 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
 
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        python -m pip install tox tox-gh-actions
-
-    - name: Test with tox
-      run: tox
-      env:
-        PLATFORM: ${{ matrix.os }}
-
-    - name: Upload coverage
-      uses: actions/upload-artifact@v4
+    - name: Set up Poetry
+      uses: abatilo/actions-poetry@v3
       with:
-        name: covdata-${{ matrix.os }}-${{ matrix.python-version }}
-        path: .coverage.*
+        poetry-version: ${{ env.POETRY_VERSION }}
 
-  combine-coverage-reports:
-    if: github.event.pull_request.draft == false
-    runs-on: ubuntu-latest
-    permissions:
-      contents: write
-    needs: tox
-    steps:
-    - uses: actions/checkout@v4
-
-    - name: Set up Python
-      uses: actions/setup-python@v5
-      with:
-        python-version: ${{ env.PYTHON_VERSION }}
-
-    - name: Download coverage reports from all jobs
-      uses: actions/download-artifact@v4
+    - name: Install dependencies
+      run: poetry install --no-interaction
 
-    - name: Flatten directory structure
-      run: |
-        shopt -s dotglob
-        for dir in ./covdata-*; do
-          if [ -d "$dir" ]; then
-            mv "$dir"/* ./
-            rm -rf "$dir"
-          fi
-        done
-        shopt -u dotglob
+    - name: Run pytest
+      run: poetry run --no-interaction -- coverage run -m pytest ./tests --import-mode importlib
 
-    - name: Combine coverage reports
+    - name: Generate coverage report
       run: |
-        python -m pip install --upgrade pip
-        python -m pip install coverage genbadge[coverage]
-        coverage combine
-        coverage report -m
-        coverage xml -o coverage/coverage.xml
-        coverage html -d coverage/html
-        genbadge coverage -i coverage/coverage.xml -o coverage/badge.svg
-
-    - name: Upload coverage reports to Codecov
-      uses: codecov/codecov-action@v3
-      env:
-        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+        poetry run --no-interaction -- coverage report -m
+        poetry run --no-interaction -- coverage xml -o ./coverage/coverage.xml
 
-    - name: Commit and push
-      if: github.event_name == 'pull_request'
-      uses: EndBug/add-and-commit@v9
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v4
       with:
-        default_author: github_actions
-        message: "Update tox report"
-        push: "origin HEAD:${{ github.head_ref }} --force"
+        directory: ./coverage/
+        file: coverage.xml
+        env_vars: OS,PYTHON
+        fail_ci_if_error: true
+        token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/tox.ini b/tox.ini
deleted file mode 100644
index 00e14c1c..00000000
--- a/tox.ini
+++ /dev/null
@@ -1,52 +0,0 @@
-[tox]
-isolated_build = true
-minversion = 4.6.4
-env_list =py{38,39,310,311,312}-{linux,darwin,win32},coverage
-
-[gh-actions]
-python =
-    3.8: py38
-    3.9: py39
-    3.10: py310
-    3.11: py311
-    3.12: py312
-[gh-actions:env]
-PLATFORM =
-    ubuntu-latest: linux
-    macos-latest: darwin
-    windows-latest: win32
-
-[testenv]
-description = run the tests with pytest
-deps =
-    pytest>=6
-    coverage
-    tomli-w
-commands =
-    coverage run --data-file .coverage.{envname} -m pytest tests/ --import-mode importlib
-
-[testenv:coverage]
-basepython =
-    python3
-deps =
-    coverage
-    genbadge[coverage]
-commands =
-    coverage combine
-    coverage report -m
-    coverage xml -o coverage/coverage.xml
-    coverage html --directory coverage/html
-    genbadge coverage -i coverage/coverage.xml -o coverage/badge.svg
-
-[coverage:run]
-parallel = true
-relative_files = true
-source =
-    capsula
-
-[coverage:report]
-exclude_lines =
-    pragma: no cover
-    raise NotImplementedError
-    if __name__ == .__main__.:
-    if TYPE_CHECKING: