diff --git a/.github/workflows/coverage.yaml b/.github/workflows/coverage.yaml
new file mode 100644
index 0000000..eb6a111
--- /dev/null
+++ b/.github/workflows/coverage.yaml
@@ -0,0 +1,25 @@
+name: Run tests and upload coverage
+
+on: push
+
+jobs:
+  test:
+    name: Run tests and collect coverage
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v5
+
+      - name: uv sync
+        run: |
+          uv sync --all-groups --all-extras
+
+      - name: Run tests
+        run: uv run make coverage
+
+      - name: Upload results to Codecov
+        uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/.gitignore b/.gitignore
index 8184c92..574ff48 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,3 +21,6 @@ _build
 .VSCodeCounter
 
 uv.lock
+
+.coverage
+coverage.xml
diff --git a/Makefile b/Makefile
index 74546a1..f1ba90c 100644
--- a/Makefile
+++ b/Makefile
@@ -14,6 +14,10 @@ test:
 test-matrix:
 	nox
 
+.PHONY: coverage
+coverage:
+	pytest --cov --cov-branch --cov-report=xml
+
 .PHONY: docs-html
 docs-html:
 	make --directory docs/ clean && make --directory docs/ html
diff --git a/pyproject.toml b/pyproject.toml
index 814a705..bf0cab8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,6 +32,7 @@ test = [
   "nox>=2025.2.9",
   "pytest-xdist",
   "pytest>=7.0",
+  "pytest-cov",
   "sphinx_design",
   "sphinxcontrib-plantuml",
 ]