diff --git a/chapter09/src/regionsApp/countrySelect.snapshot.test.js b/chapter09/src/regionsApp/countrySelect.snapshot.test.js
index 410db82..d9eb8e6 100644
--- a/chapter09/src/regionsApp/countrySelect.snapshot.test.js
+++ b/chapter09/src/regionsApp/countrySelect.snapshot.test.js
@@ -1,3 +1,5 @@
+/* @flow */
+
 import React from "react";
 import TestRenderer from "react-test-renderer";
 
diff --git a/chapter09/src/regionsApp/countrySelect.test.js b/chapter09/src/regionsApp/countrySelect.test.js
index db8d942..85344f4 100644
--- a/chapter09/src/regionsApp/countrySelect.test.js
+++ b/chapter09/src/regionsApp/countrySelect.test.js
@@ -2,6 +2,7 @@
 
 import React from "react";
 import Enzyme from "enzyme";
+
 import Adapter from "enzyme-adapter-react-16";
 
 import { CountrySelect } from "./countrySelect.component";
diff --git a/chapter09/src/regionsApp/regionsTable.connected.test.js b/chapter09/src/regionsApp/regionsTable.connected.test.js
index bec4274..79279e9 100644
--- a/chapter09/src/regionsApp/regionsTable.connected.test.js
+++ b/chapter09/src/regionsApp/regionsTable.connected.test.js
@@ -1,6 +1,7 @@
 /* @flow */
 
 import Enzyme from "enzyme/build";
+
 import Adapter from "enzyme-adapter-react-16/build";
 
 import { getProps } from "./regionsTable.connected.js";
diff --git a/chapter09/src/regionsApp/regionsTable.snapshot.test.js b/chapter09/src/regionsApp/regionsTable.snapshot.test.js
index c521f53..9ef4a08 100644
--- a/chapter09/src/regionsApp/regionsTable.snapshot.test.js
+++ b/chapter09/src/regionsApp/regionsTable.snapshot.test.js
@@ -1,3 +1,5 @@
+/* @flow */
+
 import React from "react";
 import TestRenderer from "react-test-renderer";
 
diff --git a/chapter09/src/regionsApp/world.actions.test.js b/chapter09/src/regionsApp/world.actions.test.js
index 14132b9..202b4fe 100644
--- a/chapter09/src/regionsApp/world.actions.test.js
+++ b/chapter09/src/regionsApp/world.actions.test.js
@@ -1,6 +1,7 @@
 /* @flow */
 
 import configureMockStore from "redux-mock-store";
+
 import thunk from "redux-thunk";
 
 import {
diff --git a/chapter09/src/regionsApp/world.reducer.test.js b/chapter09/src/regionsApp/world.reducer.test.js
index 7fa03e2..d262c04 100644
--- a/chapter09/src/regionsApp/world.reducer.test.js
+++ b/chapter09/src/regionsApp/world.reducer.test.js
@@ -1,6 +1,7 @@
 /* @flow */
 
 import { reducer } from "./world.reducer.js";
+
 import { countriesRequest, regionsSuccess } from "./world.actions.js";
 
 describe("The countries and regions reducer", () => {