diff --git a/docs/api/configureStore.md b/docs/api/configureStore.md
index a5969142cd..5db796496a 100644
--- a/docs/api/configureStore.md
+++ b/docs/api/configureStore.md
@@ -52,7 +52,7 @@ For more details on how the `middleware` parameter works and the list of middlew
 
 ### `devTools`
 
-If this is a boolean, it will be used to indicate  whether `configureStore` should automatically enable support for [the Redux DevTools browser extension](https://github.com/zalmoxisus/redux-devtools-extension).
+If this is a boolean, it will be used to indicate whether `configureStore` should automatically enable support for [the Redux DevTools browser extension](https://github.com/zalmoxisus/redux-devtools-extension).
 
 If it is an object of `redux-devtools-extension` [`EnhancerOptions`](https://github.com/zalmoxisus/redux-devtools-extension/blob/master/docs/API/Arguments.md#windowdevtoolsextensionconfig), `configureStore` will use the user provided configuration options.
 
diff --git a/docs/usage/usage-guide.md b/docs/usage/usage-guide.md
index 7826a7d11b..a6b75357cd 100644
--- a/docs/usage/usage-guide.md
+++ b/docs/usage/usage-guide.md
@@ -183,19 +183,19 @@ With `createReducer`, we can shorten that example considerably:
 
 ```js
 const todosReducer = createReducer([], {
-    "ADD_TODO" : (state, action) => {
-        // "mutate" the array by calling push()
-        state.push(action.payload);
-    },
-    "TOGGLE_TODO" : (state, action) => {
-        const todo = state[action.payload.index];
-        // "mutate" the object by overwriting a field
-        todo.completed = !todo.completed;
-    },
-    "REMOVE_TODO" : (state, action) => {
-        // Can still return an immutably-updated value if we want to
-        return state.filter( (todo, i) => i !== action.payload.index)
-    }
+  ADD_TODO: (state, action) => {
+    // "mutate" the array by calling push()
+    state.push(action.payload)
+  },
+  TOGGLE_TODO: (state, action) => {
+    const todo = state[action.payload.index]
+    // "mutate" the object by overwriting a field
+    todo.completed = !todo.completed
+  },
+  REMOVE_TODO: (state, action) => {
+    // Can still return an immutably-updated value if we want to
+    return state.filter((todo, i) => i !== action.payload.index)
+  }
 })
 ```
 
diff --git a/src/configureStore.test.ts b/src/configureStore.test.ts
index 7721824282..29ba380f0d 100644
--- a/src/configureStore.test.ts
+++ b/src/configureStore.test.ts
@@ -124,8 +124,8 @@ describe('configureStore', () => {
     it('calls createStore with devTools enhancer and option', () => {
       const options = {
         name: 'myApp',
-        trace: true,
-      };
+        trace: true
+      }
       expect(configureStore({ devTools: options, reducer })).toBeInstanceOf(
         Object
       )
diff --git a/src/configureStore.ts b/src/configureStore.ts
index 1354989c0d..80ab21a8af 100644
--- a/src/configureStore.ts
+++ b/src/configureStore.ts
@@ -136,7 +136,7 @@ export function configureStore<S = any, A extends Action = AnyAction>(
     finalCompose = composeWithDevTools({
       // Enable capture of stack traces for dispatched Redux actions
       trace: !IS_PRODUCTION,
-      ...typeof devTools === 'object' && devTools,
+      ...(typeof devTools === 'object' && devTools)
     })
   }