diff --git a/flow-typed/npm/promise_v8.x.x.js b/flow-typed/npm/promise_v8.x.x.js
index bdb0f5a0e02..f7eb92e4d12 100644
--- a/flow-typed/npm/promise_v8.x.x.js
+++ b/flow-typed/npm/promise_v8.x.x.js
@@ -4,15 +4,15 @@
  */
 
 declare module 'promise/setimmediate/es6-extensions' {
-  declare module.exports: Class<Promise>;
+  declare module.exports: typeof Promise;
 }
 
 declare module 'promise/setimmediate/done' {
-  declare module.exports: Class<Promise>;
+  declare module.exports: typeof Promise;
 }
 
 declare module 'promise/setimmediate/finally' {
-  declare module.exports: Class<Promise>;
+  declare module.exports: typeof Promise;
 }
 
 declare module 'promise/setimmediate/rejection-tracking' {
diff --git a/jest/preprocessor.js b/jest/preprocessor.js
index 7e8ed8de0ea..e9d12710ddf 100644
--- a/jest/preprocessor.js
+++ b/jest/preprocessor.js
@@ -101,6 +101,7 @@ module.exports = {
 
     return generate(
       ast,
+      // $FlowFixMe[prop-missing] Error found when improving flow typing for libs
       {
         code: true,
         comments: false,