ember-cli: how to prevent incremental storybook builds when running `ember test -s`?

When running ember test -s, after any file save, storybook will incrementally build and slow down testing a lot. Is there a way to prevent incremental storybook buildings when running ember test -s?

Below is a screenshot of storybook building after a file save when running ember test -s

screenshot of storybook building after a file save when running ember test -s