diff --git a/types/memory-fs/test/index.ts b/types/memory-fs/test/index.ts
index 07abb3e3fe..16d477baf2 100644
--- a/types/memory-fs/test/index.ts
+++ b/types/memory-fs/test/index.ts
@@ -15,3 +15,7 @@ fs.writeFile('hello', 'hahahahah', 'utf-8', function (err) {
         console.log(err.message);
     }
 });
+
+fs.createReadStream('hello');
+
+fs.createWriteStream('hello');
\ No newline at end of file