diff --git a/packages/react-scripts/template/README.md b/packages/react-scripts/template/README.md
index 4e4623ab569d5b301e3d494dcd04dd730d414398..989e3e388fa71b9a0938bf35ed74691c66d3183d 100644
--- a/packages/react-scripts/template/README.md
+++ b/packages/react-scripts/template/README.md
@@ -1323,6 +1323,8 @@ import Adapter from 'enzyme-adapter-react-16';
 configure({ adapter: new Adapter() });
 ```
 
+(Note that **if you already ejected** before creating `src/setupTests.js`, this won’t work unless you set [this Jest option](https://facebook.github.io/jest/docs/en/configuration.html#setuptestframeworkscriptfile-string) to point to `src/setupTests.js`.)
+
 Now you can write a smoke test with it:
 
 ```js
@@ -1412,6 +1414,8 @@ const localStorageMock = {
 global.localStorage = localStorageMock
 ```
 
+Note that **if you already ejected** before creating `src/setupTests.js`, this won’t work unless you set [this Jest option](https://facebook.github.io/jest/docs/en/configuration.html#setuptestframeworkscriptfile-string) to point to `src/setupTests.js`.
+
 ### Focusing and Excluding Tests
 
 You can replace `it()` with `xit()` to temporarily exclude a test from being executed.<br>