diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 4d079539c..b291a4cc2 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -69,6 +69,7 @@ jobs:
       MKL_NUM_THREADS: 1
       PYTHONHASHSEED: 0
       NUTILS_TENSORIAL: ${{ matrix.tensorial }}
+      COVERAGE_CORE: sysmon
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -104,7 +105,15 @@ jobs:
           python -um pip install --upgrade --upgrade-strategy eager mkl
           python -um devtools.gha.configure_mkl
       - name: Test
-        run: python -um coverage run -m unittest discover -b -q -t . -s tests
+        run: python -u -m cProfile -o stats -m coverage run -m unittest -b -v tests.test_solver.finitestrain:vector=False.test_minimize_cache
+      - name: Print profile
+        shell: python
+        run: |
+          import pstats
+          stats = pstats.Stats('stats').sort_stats('cumulative')
+          stats.print_stats(200)
+          stats.print_callers('builtins.next')
+          stats.print_callees('builtins.next')
       - name: Post-process coverage
         run: python -um devtools.gha.coverage_report_xml
       - name: Upload coverage
@@ -146,7 +155,7 @@ jobs:
           # Install Nutils from `dist` dir created in job `build-python-package`.
           python -um pip install "$_wheel[matrix_scipy,export_mpl]"
       - name: Test
-        run: python -um unittest discover -b -q -t . -s examples
+        run: python -um unittest discover -b -v -t . -s examples
   test-sphinx:
     name: Test building docs
     runs-on: ubuntu-latest