diff --git a/.github/workflows/docker-image.yml b/.github/workflows/docker-image.yml
index fb47812..196360a 100644
--- a/.github/workflows/docker-image.yml
+++ b/.github/workflows/docker-image.yml
@@ -267,6 +267,7 @@ jobs:
     runs-on: ubuntu-26.04
     needs: [setup, build-prod]
     strategy:
+      max-parallel: 2
       fail-fast: false
       matrix: ${{ fromJson(needs.setup.outputs.matrix) }}
     permissions:
diff --git a/.github/workflows/make-coverage-html.yml b/.github/workflows/make-coverage-html.yml
index c1b7635..710601b 100644
--- a/.github/workflows/make-coverage-html.yml
+++ b/.github/workflows/make-coverage-html.yml
@@ -44,8 +44,17 @@ jobs:
           gcovr --version
           echo "-----------"
 
-      - name: Run coverage HTML target
-        run: make coverage/html
+      - name: Build
+        run: |
+          make build
+
+      - name: Run tests (collect coverage)
+        run: |
+          make test-no-deps
+
+      - name: Make coverage HTML report
+        run: |
+          make coverage/html
 
       - name: Verify coverage HTML artifact
         shell: bash