align service-worker tests with service worker #1404

All 113 tests pass in 18s

113 tests - 1 113 ✔️ +2 18s ⏱️ -2s
  14 suites ±0     0 💤 ±0
    1 files ±0     0 ❌ - 3

Results for commit cab4abc. ± Comparison against earlier commit 50922d4.