diff --git a/types/storybook__react/storybook__react-tests.tsx b/types/storybook__react/storybook__react-tests.tsx
index 7b0df4f145..bf7094c580 100644
--- a/types/storybook__react/storybook__react-tests.tsx
+++ b/types/storybook__react/storybook__react-tests.tsx
@@ -2,7 +2,7 @@ import * as React from 'react';
 import { storiesOf, setAddon, addDecorator, addParameters, configure, getStorybook, RenderFunction, Story, forceReRender, DecoratorParameters, clearDecorators } from '@storybook/react';
 
 const Decorator = (story: RenderFunction) => <div>{story()}</div>;
-const Parameters: DecoratorParameters = { parameter: 'foo' };
+const parameters: DecoratorParameters = { parameter: 'foo' };
 
 forceReRender();
 
@@ -11,11 +11,11 @@ storiesOf('Welcome', module)
     .addDecorator(Decorator)
     .add('to Storybook', () => <div/>)
     .add('to Storybook as Array', () => [<div />, <div />])
-    .add('and a story with additional parameters', () => <div/>, Parameters);
+    .add('and a story with additional parameters', () => <div/>, parameters);
 
 // global addDecorator
 addDecorator(Decorator);
-addParameters(Parameters);
+addParameters(parameters);
 clearDecorators();
 
 // setAddon
@@ -34,7 +34,7 @@ storiesOf<AnyAddon>('withAnyAddon', module)
     .addWithSideEffect('more', () => <div/>)
     .add('another story', () => <div/>)
     .add('to Storybook as Array', () => [<div />, <div />])
-    .add('and a story with additional parameters', () => <div/>, Parameters)
+    .add('and a story with additional parameters', () => <div/>, parameters)
     .addWithSideEffect('even more', () => <div/>);
 
 // configure