diff --git a/types/dtype/dtype-tests.ts b/types/dtype/dtype-tests.ts
index f4e9148d82..77af4d96ad 100644
--- a/types/dtype/dtype-tests.ts
+++ b/types/dtype/dtype-tests.ts
@@ -1,15 +1,13 @@
-/// <reference types="node" />
-
 import dtype = require('dtype');
 
 // tslint:disable: new-parens
-new (dtype('Float64Array')); // $ExpectType Float64Array
+new (dtype('Float64Array'))(0); // $ExpectType Float64Array
 new (dtype('array')); // $ExpectType any[]
-new (dtype('float32')); // $ExpectType Float32Array
-new (dtype('int16')); // $ExpectType Int16Array
-new (dtype('int32')); // $ExpectType Int32Array
-new (dtype('int8')); // $ExpectType Int8Array
-new (dtype('uint16')); // $ExpectType Uint16Array
-new (dtype('uint32')); // $ExpectType Uint32Array
-new (dtype('uint8_clamped')); // $ExpectType Uint8ClampedArray
+new (dtype('float32'))(0); // $ExpectType Float32Array
+new (dtype('int16'))(0); // $ExpectType Int16Array
+new (dtype('int32'))(0); // $ExpectType Int32Array
+new (dtype('int8'))(0); // $ExpectType Int8Array
+new (dtype('uint16'))(0); // $ExpectType Uint16Array
+new (dtype('uint32'))(0); // $ExpectType Uint32Array
+new (dtype('uint8_clamped'))(0); // $ExpectType Uint8ClampedArray
 dtype('abc'); // $ExpectType undefined