README.md in sewing_kit-0.129.0 vs README.md in sewing_kit-0.130.0

@@ -101,16 +101,16 @@
 
 ## Testing the front end
 
 For fast tests with consistent results, test front-end components using Jest instead of Rails integration tests.
 
-Use [`sewing-kit test`](https://github.com/Shopify/sewing-kit/blob/master/docs/commands/test.md#L3) to run all `.test.tsx` files in the `app/ui` directory. [Jest](https://jestjs.io) is used as a test runner, with customization available via [its sewing-kit plugin](https://github.com/Shopify/sewing-kit/blob/master/docs/plugins/jest.md).
+Use [`sewing-kit test`](https://github.com/Shopify/sewing-kit/blob/main/docs/commands/test.md#L3) to run all `.test.tsx` files in the `app/ui` directory. [Jest](https://jestjs.io) is used as a test runner, with customization available via [its sewing-kit plugin](https://github.com/Shopify/sewing-kit/blob/main/docs/plugins/jest.md).
 
 ### Customizing the test environment
 
 Often you will want to hook up custom polyfills, global mocks, or other logic that needs to run either before the initialization of the test environment, or once for each test suite.
 
-By default, sewing-kit will look for such test setup files under `/app/ui/tests`. Check out the [documentation](https://github.com/Shopify/sewing-kit/blob/master/docs/plugins/jest.md#smart-defaults) for more details.
+By default, sewing-kit will look for such test setup files under `/app/ui/tests`. Check out the [documentation](https://github.com/Shopify/sewing-kit/blob/main/docs/plugins/jest.md#smart-defaults) for more details.
 
 ### Rails tests
 
 Building JavaScript assets for Rails tests adds friction to test driven development, but some projects rely on tests that intermingle erb / JavaScript behaviour. To accommodate different test styles, sewing_kit offers two test modes.