diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 83201fc900..917ca860aa 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -789,7 +789,10 @@ jobs:
   test-coverage:
     name: Coverage
     runs-on: ubuntu-latest
-    timeout-minutes: 10
+    # 10min was sized before #7114 added the lcov reporter (Codecov/Sonar need it);
+    # merging 8 shard JSONs + text+json+lcov now takes ~10-12min — three consecutive
+    # release-tip runs died at exactly 10m as job-timeout "cancelled" (2026-07-15/16).
+    timeout-minutes: 20
     needs: test-unit
     if: ${{ !cancelled() && needs.test-unit.result == 'success' && !contains(github.event.pull_request.labels.*.name, 'hotfix') }}
     env:
diff --git a/changelog.d/maintenance/coverage-job-timeout.md b/changelog.d/maintenance/coverage-job-timeout.md
new file mode 100644
index 0000000000..ce36f15f3f
--- /dev/null
+++ b/changelog.d/maintenance/coverage-job-timeout.md
@@ -0,0 +1 @@
+- **CI**: raise the Coverage job timeout 10→20min — the lcov reporter added for Codecov/Sonar (#7114) pushed the 8-shard report merge past the old cap, and three release-tip runs died at exactly 10min as job-timeout "cancelled"