diff --git a/.github/workflows/test-python.yml b/.github/workflows/test-python.yml
index 9616db38febd..f10811b19cd6 100644
--- a/.github/workflows/test-python.yml
+++ b/.github/workflows/test-python.yml
@@ -77,7 +77,11 @@ jobs:
 
       - name: Run tests and report coverage
         if: github.ref_name != 'main'
-        run: pytest --cov -n auto --dist loadgroup -m "not benchmark and not docs"
+        env:
+          # Skip coverage for Ubuntu + Python 3.12 due to performance issues
+          # https://github.com/nedbat/coveragepy/issues/1665
+          COV: ${{ (matrix.os == 'ubuntu-latest' && matrix.python-version == '3.12') && '' || '--cov' }}
+        run: pytest $COV -n auto --dist loadgroup -m "not benchmark and not docs"
 
       - name: Run tests async reader tests
         if: github.ref_name != 'main' && matrix.os != 'windows-latest'