diff --git a/.flowconfig b/.flowconfig
index c3c9c94963d0..e6be6588c8f1 100644
--- a/.flowconfig
+++ b/.flowconfig
@@ -11,4 +11,4 @@ include_warnings=true
 emoji=true
 
 [version]
-^0.66.0
+^0.70.0
diff --git a/package.json b/package.json
index e2b264d89d68..b7f57436e2fb 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "eslint-plugin-prettier": "^2.3.1",
     "eslint-plugin-react": "^7.1.0",
     "eslint-plugin-relay": "~0.0.19",
-    "flow-bin": "^0.66.0",
+    "flow-bin": "^0.70.0",
     "glob": "^7.1.1",
     "graceful-fs": "^4.1.11",
     "immutable": "^4.0.0-rc.7",
diff --git a/packages/expect/src/spy_matchers.js b/packages/expect/src/spy_matchers.js
index 9294f6de3806..1b9c44fddfe0 100644
--- a/packages/expect/src/spy_matchers.js
+++ b/packages/expect/src/spy_matchers.js
@@ -248,7 +248,7 @@ const formatReceivedCalls = (calls, limit, options) => {
     const count = calls.length - limit;
     const printedCalls = getPrintedCalls(calls, limit, ', ', printReceived);
     return (
-      `${but} it was ${options && options.isLast ? 'last ' : ''}called ` +
+      `${but} it was called ` +
       `with:\n  ` +
       printedCalls +
       (count > 0
diff --git a/packages/jest-haste-map/src/haste_fs.js b/packages/jest-haste-map/src/haste_fs.js
index 7f09f9f40098..5c2bd588bf92 100644
--- a/packages/jest-haste-map/src/haste_fs.js
+++ b/packages/jest-haste-map/src/haste_fs.js
@@ -37,7 +37,7 @@ export default class HasteFS {
     return !!this._files[file];
   }
 
-  getAllFiles() {
+  getAllFiles(): Array<string> {
     return Object.keys(this._files);
   }
 
diff --git a/packages/jest-haste-map/src/index.js b/packages/jest-haste-map/src/index.js
index 74e6feb79e41..8637caa1956a 100644
--- a/packages/jest-haste-map/src/index.js
+++ b/packages/jest-haste-map/src/index.js
@@ -542,6 +542,7 @@ class HasteMap extends EventEmitter {
   _cleanup() {
     const worker = this._worker;
 
+    // $FlowFixMe
     if (worker && typeof worker.end === 'function') {
       worker.end();
     }
@@ -726,7 +727,6 @@ class HasteMap extends EventEmitter {
 
           if (mustCopy) {
             mustCopy = false;
-            // $FlowFixMe
             hasteMap = {
               clocks: copy(hasteMap.clocks),
               duplicates: copy(hasteMap.duplicates),
@@ -755,7 +755,6 @@ class HasteMap extends EventEmitter {
             if (Object.keys(moduleMap).length === 0) {
               delete hasteMap.map[moduleName];
             } else {
-              // $FlowFixMe
               hasteMap.map[moduleName] = moduleMap;
             }
           }
diff --git a/packages/jest-mock/src/index.js b/packages/jest-mock/src/index.js
index f99aad8c144e..69a02a4860cf 100644
--- a/packages/jest-mock/src/index.js
+++ b/packages/jest-mock/src/index.js
@@ -225,7 +225,7 @@ function getSlots(object?: Object): Array<string> {
       const prop = ownNames[i];
       if (!isReadonlyProp(object, prop)) {
         const propDesc = Object.getOwnPropertyDescriptor(object, prop);
-        if (!propDesc.get || object.__esModule) {
+        if ((propDesc !== undefined && !propDesc.get) || object.__esModule) {
           slots[prop] = true;
         }
       }
@@ -801,7 +801,9 @@ class ModuleMockerClass {
       }
 
       descriptor[accessType] = this._makeComponent({type: 'function'}, () => {
+        // $FlowFixMe
         descriptor[accessType] = original;
+        // $FlowFixMe
         Object.defineProperty(obj, propertyName, descriptor);
       });
 
diff --git a/packages/jest-resolve/src/default_resolver.js b/packages/jest-resolve/src/default_resolver.js
index 72f5706d4aa8..ae85c4e888d8 100644
--- a/packages/jest-resolve/src/default_resolver.js
+++ b/packages/jest-resolve/src/default_resolver.js
@@ -8,8 +8,13 @@
  */
 
 import type {Path} from 'types/Config';
+import type {ErrorWithCode} from 'types/Errors';
 
 import browserResolve from 'browser-resolve';
+import fs from 'fs';
+import path from 'path';
+import isBuiltinModule from './is_builtin_module';
+import nodeModulesPaths from './node_modules_paths';
 
 type ResolverOptions = {|
   basedir: Path,
@@ -35,17 +40,6 @@ export default function defaultResolver(
   });
 }
 
-/*
- * Adapted from: https://github.com/substack/node-resolve
- */
-type ErrorWithCode = Error & {code?: string};
-
-import fs from 'fs';
-import path from 'path';
-import isBuiltinModule from './is_builtin_module';
-
-import nodeModulesPaths from './node_modules_paths';
-
 const REGEX_RELATIVE_IMPORT = /^(?:\.\.?(?:\/|$)|\/|([A-Za-z]:)?[\\\/])/;
 
 function resolveSync(target: Path, options: ResolverOptions): Path {
diff --git a/packages/jest-resolve/src/index.js b/packages/jest-resolve/src/index.js
index c3dba0ea3685..8687878d83e5 100644
--- a/packages/jest-resolve/src/index.js
+++ b/packages/jest-resolve/src/index.js
@@ -10,6 +10,7 @@
 import type {Path} from 'types/Config';
 import type {ModuleMap} from 'types/HasteMap';
 import type {ResolveModuleConfig} from 'types/Resolve';
+import type {ErrorWithCode} from 'types/Errors';
 
 import fs from 'fs';
 import path from 'path';
@@ -194,7 +195,7 @@ class Resolver {
     const err = new Error(
       `Cannot find module '${moduleName}' from '${relativePath || '.'}'`,
     );
-    (err: Error & {code?: string}).code = 'MODULE_NOT_FOUND';
+    (err: ErrorWithCode).code = 'MODULE_NOT_FOUND';
     throw err;
   }
 
diff --git a/packages/jest-runner/src/test_worker.js b/packages/jest-runner/src/test_worker.js
index b482756c0530..5b178df03a4b 100644
--- a/packages/jest-runner/src/test_worker.js
+++ b/packages/jest-runner/src/test_worker.js
@@ -10,6 +10,7 @@
 import type {GlobalConfig, Path, ProjectConfig} from 'types/Config';
 import type {SerializableError, TestResult} from 'types/TestResult';
 import type {RawModuleMap} from 'types/HasteMap';
+import type {ErrorWithCode} from 'types/Errors';
 
 import exit from 'exit';
 import HasteMap from 'jest-haste-map';
@@ -30,7 +31,7 @@ process.on('uncaughtException', err => {
   exit(1);
 });
 
-const formatError = (error: string | Error): SerializableError => {
+const formatError = (error: string | ErrorWithCode): SerializableError => {
   if (typeof error === 'string') {
     const {message, stack} = separateMessageFromStack(error);
     return {
diff --git a/packages/jest-runtime/src/script_transformer.js b/packages/jest-runtime/src/script_transformer.js
index 43604830a335..45026af2dd33 100644
--- a/packages/jest-runtime/src/script_transformer.js
+++ b/packages/jest-runtime/src/script_transformer.js
@@ -13,6 +13,7 @@ import type {
   TransformedSource,
   TransformResult,
 } from 'types/Transform';
+import type {ErrorWithCode} from 'types/Errors';
 
 import crypto from 'crypto';
 import path from 'path';
@@ -435,7 +436,7 @@ const writeCacheFile = (cachePath: Path, fileData: string) => {
  * If the target file exists we can be reasonably sure another process has
  * legitimately won a cache write race and ignore the error.
  */
-const cacheWriteErrorSafeToIgnore = (e: Error, cachePath: Path) => {
+const cacheWriteErrorSafeToIgnore = (e: ErrorWithCode, cachePath: Path) => {
   return (
     process.platform === 'win32' &&
     e.code === 'EPERM' &&
diff --git a/packages/jest-serializer/src/index.js b/packages/jest-serializer/src/index.js
index ff40f1c3724c..eae58cd32022 100644
--- a/packages/jest-serializer/src/index.js
+++ b/packages/jest-serializer/src/index.js
@@ -132,12 +132,14 @@ function jsonParse(content) {
 // In memory functions.
 
 export function deserialize(buffer: Buffer): any {
+  // $FlowFixMe - Node 8+ only
   return v8.deserialize
     ? v8.deserialize(buffer)
     : jsonParse(buffer.toString('utf8'));
 }
 
 export function serialize(content: any): Buffer {
+  // $FlowFixMe - Node 8+ only
   return v8.serialize
     ? v8.serialize(content)
     : Buffer.from(jsonStringify(content));
@@ -146,12 +148,14 @@ export function serialize(content: any): Buffer {
 // Synchronous filesystem functions.
 
 export function readFileSync(filePath: Path): any {
+  // $FlowFixMe - Node 8+ only
   return v8.deserialize
     ? v8.deserialize(fs.readFileSync(filePath))
     : jsonParse(fs.readFileSync(filePath, 'utf8'));
 }
 
 export function writeFileSync(filePath: Path, content: any) {
+  // $FlowFixMe - Node 8+ only
   return v8.serialize
     ? fs.writeFileSync(filePath, v8.serialize(content))
     : fs.writeFileSync(filePath, jsonStringify(content), 'utf8');
diff --git a/packages/jest-snapshot/src/plugins.js b/packages/jest-snapshot/src/plugins.js
index b561f7eb88b6..de9df49e1e3a 100644
--- a/packages/jest-snapshot/src/plugins.js
+++ b/packages/jest-snapshot/src/plugins.js
@@ -20,7 +20,7 @@ const {
   ReactTestComponent,
 } = prettyFormat.plugins;
 
-let PLUGINS = [
+let PLUGINS: Array<Plugin> = [
   ReactTestComponent,
   ReactElement,
   DOMElement,
diff --git a/packages/jest-snapshot/src/utils.js b/packages/jest-snapshot/src/utils.js
index 39d6f0ae6bf0..13f907db3239 100644
--- a/packages/jest-snapshot/src/utils.js
+++ b/packages/jest-snapshot/src/utils.js
@@ -123,7 +123,7 @@ export const getSnapshotData = (
     dirty = true;
   }
 
-  return {data, dirty};
+  return ({data, dirty}: {data: any, dirty: boolean});
 };
 
 // Extra line breaks at the beginning and at the end of the snapshot are useful
diff --git a/packages/jest-util/src/deep_cyclic_copy.js b/packages/jest-util/src/deep_cyclic_copy.js
index 7c08cb82f9ea..12e63115ccef 100644
--- a/packages/jest-util/src/deep_cyclic_copy.js
+++ b/packages/jest-util/src/deep_cyclic_copy.js
@@ -14,7 +14,7 @@ export type DeepCyclicCopyOptions = {|
   keepPrototype: boolean,
 |};
 
-// Node 6 does not have gOPDs, so we define a simple polyfill for it.
+// $FlowFixMe: Node 6 does not have gOPDs, so we define a simple polyfill for it.
 if (!Object.getOwnPropertyDescriptors) {
   // $FlowFixMe: polyfill
   Object.getOwnPropertyDescriptors = obj => {
diff --git a/packages/jest-util/src/fake_timers.js b/packages/jest-util/src/fake_timers.js
index 044449892081..e321fa8d9a3a 100644
--- a/packages/jest-util/src/fake_timers.js
+++ b/packages/jest-util/src/fake_timers.js
@@ -415,9 +415,6 @@ export default class FakeTimers<TimerRef> {
 
     const cancelledTicks = this._cancelledTicks;
     this._timerAPIs.nextTick(() => {
-      if (this._blocked) {
-        return;
-      }
       if (!cancelledTicks.hasOwnProperty(uuid)) {
         // Callback may throw, so update the map prior calling.
         cancelledTicks[uuid] = true;
diff --git a/types/Argv.js b/types/Argv.js
index 71b3388b123f..81926b868cc7 100644
--- a/types/Argv.js
+++ b/types/Argv.js
@@ -19,8 +19,9 @@ export type Argv = {|
   cacheDirectory: string,
   changedFilesWithAncestor: boolean,
   changedSince: string,
-  clearMocks: boolean,
   ci: boolean,
+  clearCache: boolean,
+  clearMocks: boolean,
   collectCoverage: boolean,
   collectCoverageFrom: Array<string>,
   collectCoverageOnlyFrom: Array<string>,
@@ -30,19 +31,21 @@ export type Argv = {|
   coveragePathIgnorePatterns: Array<string>,
   coverageReporters: Array<string>,
   coverageThreshold: string,
+  debug: boolean,
   env: string,
   expand: boolean,
   findRelatedTests: boolean,
   forceExit: boolean,
+  globals: string,
   globalSetup: ?string,
   globalTeardown: ?string,
-  globals: string,
   h: boolean,
   haste: string,
   help: boolean,
   json: boolean,
   lastCommit: boolean,
   logHeapUsage: boolean,
+  maxWorkers: number,
   moduleDirectories: Array<string>,
   moduleFileExtensions: Array<string>,
   moduleLoader: string,
@@ -57,6 +60,7 @@ export type Argv = {|
   onlyChanged: boolean,
   outputFile: string,
   preset: ?string,
+  projects: Array<string>,
   replname: ?string,
   resetMocks: boolean,
   resetModules: boolean,
@@ -64,8 +68,10 @@ export type Argv = {|
   restoreMocks: boolean,
   rootDir: string,
   roots: Array<string>,
+  runInBand: boolean,
   setupFiles: Array<string>,
   setupTestFrameworkScriptFile: string,
+  showConfig: boolean,
   silent: boolean,
   snapshotSerializers: Array<string>,
   testEnvironment: string,
@@ -81,12 +87,13 @@ export type Argv = {|
   timers: 'real' | 'fake',
   transform: string,
   transformIgnorePatterns: Array<string>,
-  watchPathIgnorePatterns: Array<string>,
   unmockedModulePathPatterns: ?Array<string>,
   updateSnapshot: boolean,
   useStderr: boolean,
   verbose: ?boolean,
+  version: boolean,
   watch: boolean,
   watchAll: boolean,
   watchman: boolean,
+  watchPathIgnorePatterns: Array<string>,
 |};
diff --git a/types/Errors.js b/types/Errors.js
new file mode 100644
index 000000000000..0a067b013f02
--- /dev/null
+++ b/types/Errors.js
@@ -0,0 +1,2 @@
+// @flow
+export type ErrorWithCode = Error & {code?: string};
diff --git a/yarn.lock b/yarn.lock
index 7a6dae4cf82f..817adcee6586 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3685,9 +3685,9 @@ flat-cache@^1.2.1:
     graceful-fs "^4.1.2"
     write "^0.2.1"
 
-flow-bin@^0.66.0:
-  version "0.66.0"
-  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.66.0.tgz#a96dde7015dc3343fd552a7b4963c02be705ca26"
+flow-bin@^0.70.0:
+  version "0.70.0"
+  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.70.0.tgz#080ae83a997f2b4ddb3dc2649bf13336825292b5"
 
 flow-remove-types@^1.1.0:
   version "1.2.3"