diff --git a/README.md b/README.md
index d9d35791aff8..d6769869b0fe 100644
--- a/README.md
+++ b/README.md
@@ -117,7 +117,7 @@ like
  ```
 
 The
-[React](https://github.com/facebook/react/tree/master/src/renderers/shared/reconciler/__tests__),
+[React](https://github.com/facebook/react/tree/master/src/renderers/shared/stack/reconciler/__tests__),
 [Relay](https://github.com/facebook/relay/tree/master/src/container/__tests__) and
 [react-native](https://github.com/facebook/react-native/tree/master/Libraries/Animated/src/__tests__)
 repositories have excellent examples of tests written by Facebook engineers.
@@ -285,6 +285,7 @@ just added.
   - [`jest.disableAutomock()`](https://facebook.github.io/jest/docs/api.html#jest-disableautomock)
   - [`jest.enableAutomock()`](https://facebook.github.io/jest/docs/api.html#jest-enableautomock)
   - [`jest.fn(?implementation)`](https://facebook.github.io/jest/docs/api.html#jest-fn-implementation)
+  - [`jest.isMockFunction(fn)`](https://facebook.github.io/jest/docs/api.html#jest-ismockfunction-implementation)
   - [`jest.genMockFromModule(moduleName)`](https://facebook.github.io/jest/docs/api.html#jest-genmockfrommodule-modulename)
   - [`jest.mock(moduleName, ?factory)`](https://facebook.github.io/jest/docs/api.html#jest-mock-modulename-factory)
   - [`jest.runAllTicks()`](https://facebook.github.io/jest/docs/api.html#jest-runallticks)
@@ -426,6 +427,9 @@ implementation.
   console.log(returnsTrue()) // true;
 ```
 
+### `jest.isMockFunction(fn)`
+Determines if the given function is a mocked function.
+
 ### `jest.genMockFromModule(moduleName)`
 Given the name of a module, use the automatic mocking system to generate a mocked version of the module for you.
 
diff --git a/docs/GettingStarted.md b/docs/GettingStarted.md
index c63fa84ff2ae..bebefb9aa66b 100644
--- a/docs/GettingStarted.md
+++ b/docs/GettingStarted.md
@@ -112,7 +112,7 @@ like
  ```
 
 The
-[React](https://github.com/facebook/react/tree/master/src/renderers/shared/reconciler/__tests__),
+[React](https://github.com/facebook/react/tree/master/src/renderers/shared/stack/reconciler/__tests__),
 [Relay](https://github.com/facebook/relay/tree/master/src/container/__tests__) and
 [react-native](https://github.com/facebook/react-native/tree/master/Libraries/Animated/src/__tests__)
 repositories have excellent examples of tests written by Facebook engineers.