Every popup boot in the tests resets jest's module registry so that src/ loads fresh, and that also reloaded ethers, libsodium-wrappers-sumo, qrcode and ethereum-blockies-base64 each time. tests/support/popupBoot.js now loads those four once per test file and registers them once with jest.doMock(), which jest.resetModules() keeps, so every boot gets the same copies. No test or assertion changed. make test takes 8-13s on the shared build host, down from 17-25s, measured in alternating runs before and after the change. Model: opus-5-5