This cuts the running time of `grunt phantom:run` from 4.4s to 3.1s on my machine, because we no longer have to load/execute a separate instance of `react-test.js` in a separate `<iframe>` for each test.
This cuts the running time of `grunt phantom:run` from 4.4s to 3.1s on my machine, because we no longer have to load/execute a separate instance of `react-test.js` in a separate `<iframe>` for each test.