diff --git a/flow/jest.js b/flow/jest.js
index 1780dfa9f28..8975e3b33c8 100644
--- a/flow/jest.js
+++ b/flow/jest.js
@@ -4,13 +4,16 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * Copied from https://raw.githubusercontent.com/flow-typed/flow-typed/master/definitions/npm/jest_v23.x.x/flow_v0.39.x-/jest_v23.x.x.js
- * @flow strict
+ * Modified from https://raw.githubusercontent.com/flow-typed/flow-typed/master/definitions/npm/jest_v23.x.x/flow_v0.39.x-/jest_v23.x.x.js
+ * List of modifications:
+ *  - fix some [] -> Array lint warnings
+ *  - make it.each/describe.each take $ReadOnlyArray instead of Array<mixed>
+ *  - added definition for `isolateModules`
+ *
+ * TODO(T35016336) remove the .each modifications if flow-typed adopts them
  * @format
  */
 
-/* eslint-disable lint/no-unclear-flowtypes */
-
 type JestMockFn<TArguments: $ReadOnlyArray<mixed>, TReturn> = {|
   (...args: TArguments): TReturn,
   /**
@@ -272,7 +275,7 @@ type JestExtendedMatchersType = {
    * Use .toBeOneOf when checking if a value is a member of a given Array.
    * @param {Array.<*>} members
    */
-  toBeOneOf(members: any[]): void,
+  toBeOneOf(members: Array<any>): void,
 
   /**
    * Use `.toBeNil` when checking a value is `null` or `undefined`.
@@ -300,13 +303,13 @@ type JestExtendedMatchersType = {
    * Use `.toIncludeAllMembers` when checking if an `Array` contains all of the same members of a given set.
    * @param {Array.<*>} members
    */
-  toIncludeAllMembers(members: any[]): void,
+  toIncludeAllMembers(members: Array<any>): void,
 
   /**
    * Use `.toIncludeAnyMembers` when checking if an `Array` contains any of the members of a given set.
    * @param {Array.<*>} members
    */
-  toIncludeAnyMembers(members: any[]): void,
+  toIncludeAnyMembers(members: Array<any>): void,
 
   /**
    * Use `.toSatisfyAll` when you want to use a custom matcher by supplying a predicate function that returns a `Boolean` for all values in an array.
@@ -409,21 +412,21 @@ type JestExtendedMatchersType = {
    *
    * @param {Array.<String>} keys
    */
-  toContainKeys(keys: string[]): void,
+  toContainKeys(keys: Array<string>): void,
 
   /**
    * Use `.toContainAllKeys` when checking if an object only contains all of the provided keys.
    *
    * @param {Array.<String>} keys
    */
-  toContainAllKeys(keys: string[]): void,
+  toContainAllKeys(keys: Array<string>): void,
 
   /**
    * Use `.toContainAnyKeys` when checking if an object contains at least one of the provided keys.
    *
    * @param {Array.<String>} keys
    */
-  toContainAnyKeys(keys: string[]): void,
+  toContainAnyKeys(keys: Array<string>): void,
 
   /**
    * Use `.toContainValue` when checking if an object contains the provided value.
@@ -437,21 +440,21 @@ type JestExtendedMatchersType = {
    *
    * @param {Array.<*>} values
    */
-  toContainValues(values: any[]): void,
+  toContainValues(values: Array<any>): void,
 
   /**
    * Use `.toContainAllValues` when checking if an object only contains all of the provided values.
    *
    * @param {Array.<*>} values
    */
-  toContainAllValues(values: any[]): void,
+  toContainAllValues(values: Array<any>): void,
 
   /**
    * Use `.toContainAnyValues` when checking if an object contains at least one of the provided values.
    *
    * @param {Array.<*>} values
    */
-  toContainAnyValues(values: any[]): void,
+  toContainAnyValues(values: Array<any>): void,
 
   /**
    * Use `.toContainEntry` when checking if an object contains the provided entry.
@@ -465,21 +468,21 @@ type JestExtendedMatchersType = {
    *
    * @param {Array.<Array.<String, String>>} entries
    */
-  toContainEntries(entries: [string, string][]): void,
+  toContainEntries(entries: Array<[string, string]>): void,
 
   /**
    * Use `.toContainAllEntries` when checking if an object only contains all of the provided entries.
    *
    * @param {Array.<Array.<String, String>>} entries
    */
-  toContainAllEntries(entries: [string, string][]): void,
+  toContainAllEntries(entries: Array<[string, string]>): void,
 
   /**
    * Use `.toContainAnyEntries` when checking if an object contains at least one of the provided entries.
    *
    * @param {Array.<Array.<String, String>>} entries
    */
-  toContainAnyEntries(entries: [string, string][]): void,
+  toContainAnyEntries(entries: Array<[string, string]>): void,
 
   /**
    * Use `.toBeExtensible` when checking if an object is extensible.
@@ -542,7 +545,7 @@ type JestExtendedMatchersType = {
    *
    * @param {Array.<String>} substring
    */
-  toIncludeMultiple(substring: string[]): void,
+  toIncludeMultiple(substring: Array<string>): void,
 };
 
 interface JestExpectType {
@@ -824,7 +827,7 @@ type JestObjectType = {
    * Returns the actual module instead of a mock, bypassing all checks on
    * whether the module should receive a mock implementation or not.
    */
-  requireActual(moduleName: string): any,
+  requireActual<T>(m: $Flow$ModuleRef<T> | string): T,
   /**
    * Returns a mock module instead of the actual module, bypassing all checks
    * on whether the module should be required normally or not.
@@ -952,11 +955,11 @@ declare var describe: {
    *
    * @param {table} table of Test
    */
-  each(
-    table: $ReadOnlyArray<mixed | $ReadOnlyArray<mixed>>,
+  each<TArguments: Array<mixed> | mixed>(
+    table: $ReadOnlyArray<TArguments>,
   ): (
     name: JestTestName,
-    fn?: (...args: Array<any>) => ?Promise<mixed>,
+    fn?: (...args: TArguments) => ?Promise<mixed>,
   ) => void,
 };
 
@@ -979,11 +982,11 @@ declare var it: {
    *
    * @param {table} table of Test
    */
-  each(
-    table: $ReadOnlyArray<mixed | $ReadOnlyArray<mixed>>,
+  each<TArguments: Array<mixed> | mixed>(
+    table: $ReadOnlyArray<TArguments>,
   ): (
     name: JestTestName,
-    fn?: (...args: Array<any>) => ?Promise<mixed>,
+    fn?: (...args: TArguments) => ?Promise<mixed>,
   ) => void,
   /**
    * Only run this test
@@ -997,11 +1000,11 @@ declare var it: {
     fn?: (done: () => void) => ?Promise<mixed>,
     timeout?: number,
   ): {
-    each(
-      table: $ReadOnlyArray<mixed | $ReadOnlyArray<mixed>>,
+    each<TArguments: Array<mixed> | mixed>(
+      table: $ReadOnlyArray<TArguments>,
     ): (
       name: JestTestName,
-      fn?: (...args: Array<any>) => ?Promise<mixed>,
+      fn?: (...args: TArguments) => ?Promise<mixed>,
     ) => void,
   },
   /**
@@ -1028,17 +1031,6 @@ declare var it: {
     fn?: (done: () => void) => ?Promise<mixed>,
     timeout?: number,
   ): void,
-  /**
-   * each runs this test against array of argument arrays per each run
-   *
-   * @param {table} table of Test
-   */
-  each(
-    table: $ReadOnlyArray<mixed | $ReadOnlyArray<mixed>>,
-  ): (
-    name: JestTestName,
-    fn?: (...args: Array<any>) => ?Promise<mixed>,
-  ) => void,
 };
 declare function fit(
   name: JestTestName,