diff --git a/types/webpack/webpack-tests.ts b/types/webpack/webpack-tests.ts
index aeb17e5d4c..0ec170876b 100644
--- a/types/webpack/webpack-tests.ts
+++ b/types/webpack/webpack-tests.ts
@@ -421,6 +421,8 @@ plugin = new webpack.WatchIgnorePlugin(paths);
 plugin = new webpack.LoaderOptionsPlugin({
     debug: true
 });
+plugin = new webpack.EnvironmentPlugin(['a', 'b']);
+plugin = new webpack.EnvironmentPlugin([{a: true, b: 'c'});
 plugin = new webpack.ProgressPlugin((percent: number, message: string) => {});
 
 //