diff --git a/flow/jest.js b/flow/jest.js
index b149195e076..1780dfa9f28 100644
--- a/flow/jest.js
+++ b/flow/jest.js
@@ -953,7 +953,7 @@ declare var describe: {
    * @param {table} table of Test
    */
   each(
-    table: Array<Array<mixed> | mixed>,
+    table: $ReadOnlyArray<mixed | $ReadOnlyArray<mixed>>,
   ): (
     name: JestTestName,
     fn?: (...args: Array<any>) => ?Promise<mixed>,
@@ -980,7 +980,7 @@ declare var it: {
    * @param {table} table of Test
    */
   each(
-    table: Array<Array<mixed> | mixed>,
+    table: $ReadOnlyArray<mixed | $ReadOnlyArray<mixed>>,
   ): (
     name: JestTestName,
     fn?: (...args: Array<any>) => ?Promise<mixed>,
@@ -998,7 +998,7 @@ declare var it: {
     timeout?: number,
   ): {
     each(
-      table: Array<Array<mixed> | mixed>,
+      table: $ReadOnlyArray<mixed | $ReadOnlyArray<mixed>>,
     ): (
       name: JestTestName,
       fn?: (...args: Array<any>) => ?Promise<mixed>,
@@ -1034,7 +1034,7 @@ declare var it: {
    * @param {table} table of Test
    */
   each(
-    table: Array<Array<mixed> | mixed>,
+    table: $ReadOnlyArray<mixed | $ReadOnlyArray<mixed>>,
   ): (
     name: JestTestName,
     fn?: (...args: Array<any>) => ?Promise<mixed>,
@@ -1065,9 +1065,7 @@ type JestPrettyFormatColors = {
 };
 
 type JestPrettyFormatIndent = string => string;
-type JestPrettyFormatRefs = Array<any>;
 type JestPrettyFormatPrint = any => string;
-type JestPrettyFormatStringOrNull = string | null;
 
 type JestPrettyFormatOptions = {|
   callToJSON: boolean,