diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 62babea..5a81e99 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -25,11 +25,20 @@ jobs:
           python -m pip install --upgrade pip
           pip install .[dev]
       - name: Lint with Black
+        id: black
+        continue-on-error: true
         run: |
           black --check matrix/ tests/ examples/
       - name: Check typing with mypy
+        id: mypy
+        continue-on-error: true
         run: |
           mypy matrix
       - name: Test with pytest
+        id: pytest
+        continue-on-error: true
         run: |
-          pytest -v
+          pytest -v --cov=matrix --cov-report=term-missing --cov-fail-under=90
+      - name: All checks succeeded
+        if: steps.black.outcome == 'failure' || steps.mypy.outcome == 'failure' || steps.pytest.outcome == 'failure'
+        run: exit 1
diff --git a/pyproject.toml b/pyproject.toml
index 7f86118..0650b07 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,6 +28,7 @@ dependencies = [
 [project.optional-dependencies]
 dev = [
     "pytest==9.1.1",
+    "pytest-cov==7.1.0",
     "pytest-asyncio==1.4.0",
     "black==26.5.1",
     "mypy==2.1.0",