diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 7e0b3071..6353adbb 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -30,9 +30,25 @@ jobs:
 
     - name: Test built package
       run: |
-        pip install pytest
+        pip install pytest pytest-cov
         pip install ./target
-        pytest -v pipeline/tests
+        if [ "${{ matrix.python-version }}" = "3.14" ]; then
+          # Put the in-tree build first on the path, so that coverage is recorded
+          # against target/openminds rather than the copy in site-packages, whose
+          # path changes with every Python patch release.
+          PYTHONPATH=target pytest -v --cov=openminds --cov-report term --cov-report lcov pipeline/tests
+        else
+          pytest -v pipeline/tests
+        fi
+
+    - name: Upload coverage to Coveralls
+      if: matrix.python-version == '3.14'
+      uses: coverallsapp/github-action@v2
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        file: coverage.lcov
+        parallel: false
+        fail-on-error: false
 
     - name: Checkout main branch
       uses: actions/checkout@v4
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e4584eed..cd407bd7 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -34,7 +34,19 @@ jobs:
         pip install pytest pytest-cov
         pip install ./target
         if [ "${{ matrix.python-version }}" = "3.14" ]; then
-          pytest -v --cov=openminds --cov-report term pipeline/tests
+          # Put the in-tree build first on the path, so that coverage is recorded
+          # against target/openminds rather than the copy in site-packages, whose
+          # path changes with every Python patch release.
+          PYTHONPATH=target pytest -v --cov=openminds --cov-report term --cov-report lcov pipeline/tests
         else
           pytest -v pipeline/tests
         fi
+
+    - name: Upload coverage to Coveralls
+      if: matrix.python-version == '3.14'
+      uses: coverallsapp/github-action@v2
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        file: coverage.lcov
+        parallel: false
+        fail-on-error: false