diff --git a/source/index.ts b/source/index.ts
index c6aeea2..868ec18 100644
--- a/source/index.ts
+++ b/source/index.ts
@@ -48,8 +48,7 @@ export const enum TypeName {
 	ArrayBuffer = 'ArrayBuffer',
 	SharedArrayBuffer = 'SharedArrayBuffer',
 	DataView = 'DataView',
-	Promise = 'Promise',
-	URL = 'URL'
+	Promise = 'Promise'
 }
 
 const toString = Object.prototype.toString;
@@ -178,7 +177,6 @@ namespace is { // tslint:disable-line:no-namespace
 	export const dataView = isObjectOfType<DataView>(TypeName.DataView);
 
 	export const directInstanceOf = <T>(instance: any, klass: Class<T>): instance is T => Object.getPrototypeOf(instance) === klass.prototype;
-	export const urlInstance = (value: any): value is URL => isObjectOfType<URL>(TypeName.URL)(value);
 
 	export const truthy = (value: any) => Boolean(value);
 	export const falsy = (value: any) => !value;
diff --git a/source/tests/test.ts b/source/tests/test.ts
index 92897e0..a2d56ad 100644
--- a/source/tests/test.ts
+++ b/source/tests/test.ts
@@ -3,7 +3,6 @@ import net from 'net';
 import Stream from 'stream';
 import util from 'util';
 import tempy from 'tempy';
-import {URL} from 'url';
 import test, {TestContext, Context} from 'ava';
 import {JSDOM} from 'jsdom';
 import {Subject, Observable} from 'rxjs';
@@ -535,16 +534,6 @@ test('is.directInstanceOf', t => {
 	t.false(m.directInstanceOf(errorSubclass, Error));
 });
 
-test('is.urlInstance', t => {
-	const url = new URL('https://google.com');
-
-	t.true(m.urlInstance(url));
-
-	t.false(m.urlInstance({}));
-	t.false(m.urlInstance(undefined));
-	t.false(m.urlInstance(null));
-});
-
 test('is.truthy', t => {
 	t.true(m.truthy('unicorn'));
 	t.true(m.truthy('🦄'));