workflows/ci: run tests in a band as they are already parallelized by lerna

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

.github/workflows/ci.yml

@@ -140,7 +140,7 @@ jobs:
 
       - name: test changed packages
         if: ${{ steps.yarn-lock.outcome == 'success' }}
-        run: yarn lerna -- run test --since origin/master -- --coverage
+        run: yarn lerna -- run test --since origin/master -- --coverage --runInBand
         env:
           BACKSTAGE_TEST_DATABASE_POSTGRES13_CONNECTION_STRING: postgresql://postgres:postgres@localhost:${{ job.services.postgres13.ports[5432] }}
           BACKSTAGE_TEST_DATABASE_POSTGRES9_CONNECTION_STRING: postgresql://postgres:postgres@localhost:${{ job.services.postgres9.ports[5432] }}
@@ -149,7 +149,7 @@ jobs:
       - name: test all packages (and upload coverage)
         if: ${{ steps.yarn-lock.outcome == 'failure' }}
         run: |
-          yarn lerna -- run test -- --coverage
+          yarn lerna -- run test -- --coverage --runInBand
           bash <(curl -s https://codecov.io/bash) -N $(git rev-parse FETCH_HEAD)
         env:
           BACKSTAGE_TEST_DATABASE_POSTGRES13_CONNECTION_STRING: postgresql://postgres:postgres@localhost:${{ job.services.postgres13.ports[5432] }}

.github/workflows/master-win.yml

@@ -58,7 +58,7 @@ jobs:
         run: lerna run --scope @backstage/core-* build
 
       - name: test
-        run: yarn lerna -- run test
+        run: yarn lerna -- run test --runInBand
         env:
           BACKSTAGE_TEST_DISABLE_DOCKER: 1
 

.github/workflows/master.yml

@@ -116,7 +116,7 @@ jobs:
 
       - name: test (and upload coverage)
         run: |
-          yarn lerna -- run test -- --coverage
+          yarn lerna -- run test -- --coverage --runInBand
           bash <(curl -s https://codecov.io/bash)
           # Upload code coverage for some specific flags. Also see .codecov.yml
           bash <(curl -s https://codecov.io/bash) -f packages/core-app-api/coverage/* -F core-app-api