diff --git a/types/gulp-postcss/gulp-postcss-test.ts b/types/gulp-postcss/gulp-postcss-tests.ts
similarity index 100%
rename from types/gulp-postcss/gulp-postcss-test.ts
rename to types/gulp-postcss/gulp-postcss-tests.ts
diff --git a/types/gulp-postcss/index.d.ts b/types/gulp-postcss/index.d.ts
index 98e3d9310d..864be16098 100644
--- a/types/gulp-postcss/index.d.ts
+++ b/types/gulp-postcss/index.d.ts
@@ -2,6 +2,7 @@
 // Project: https://www.npmjs.com/package/gulp-postcss
 // Definitions by: Takesi Tokugawa <https://github.com/TokugawaTakesi>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.2
 
 /// <reference types="node"/>
 import Vinyl = require('vinyl');
@@ -12,7 +13,7 @@ declare function GulpPostCss(callback?: (file: Vinyl) => { plugins?: string[], o
 
 declare namespace GulpPostCss {
     interface Options {
-        parser?: Object;
+        parser?: any;
     }
 }
 
diff --git a/types/gulp-postcss/tsconfig.json b/types/gulp-postcss/tsconfig.json
index d48ac90475..5b6ff833f8 100644
--- a/types/gulp-postcss/tsconfig.json
+++ b/types/gulp-postcss/tsconfig.json
@@ -18,6 +18,6 @@
     },
     "files": [
         "index.d.ts",
-        "gulp-tap-tests.ts"
+        "gulp-postcss-tests.ts"
     ]
 }