diff --git a/.gitignore b/.gitignore
index 239ecff..748ccb6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 node_modules
 yarn.lock
+.nyc_output
diff --git a/.travis.yml b/.travis.yml
index c89aee6..5e3bcf3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,5 @@ language: node_js
 node_js:
   - '10'
   - '8'
-  - '6'
 after_success:
   - './node_modules/.bin/nyc report --reporter=text-lcov | ./node_modules/.bin/coveralls'
diff --git a/index.js b/index.js
index ce70108..7e9e294 100644
--- a/index.js
+++ b/index.js
@@ -6,31 +6,33 @@ const testParameter = (name, filters) => {
 	return filters.some(filter => filter instanceof RegExp ? filter.test(name) : filter === name);
 };
 
-module.exports = (urlString, opts) => {
-	opts = Object.assign({
+module.exports = (urlString, options) => {
+	options = {
 		defaultProtocol: 'http:',
 		normalizeProtocol: true,
 		forceHttp: false,
 		forceHttps: false,
-		stripHash: true,
+		stripAuthentication: true,
+		stripHash: false,
 		stripWWW: true,
 		removeQueryParameters: [/^utm_\w+/i],
 		removeTrailingSlash: true,
 		removeDirectoryIndex: false,
-		sortQueryParameters: true
-	}, opts);
+		sortQueryParameters: true,
+		...options
+	};
 
-	// Backwards compatibility
-	if (Reflect.has(opts, 'normalizeHttps')) {
-		opts.forceHttp = opts.normalizeHttps;
+	// TODO: Remove this at some point in the future
+	if (Reflect.has(options, 'normalizeHttps')) {
+		throw new Error('options.normalizeHttps is renamed to options.forceHttp');
 	}
 
-	if (Reflect.has(opts, 'normalizeHttp')) {
-		opts.forceHttps = opts.normalizeHttp;
+	if (Reflect.has(options, 'normalizeHttp')) {
+		throw new Error('options.normalizeHttp is renamed to options.forceHttps');
 	}
 
-	if (Reflect.has(opts, 'stripFragment')) {
-		opts.stripHash = opts.stripFragment;
+	if (Reflect.has(options, 'stripFragment')) {
+		throw new Error('options.stripFragment is renamed to options.stripHash');
 	}
 
 	urlString = urlString.trim();
@@ -40,25 +42,31 @@ module.exports = (urlString, opts) => {
 
 	// Prepend protocol
 	if (!isRelativeUrl) {
-		urlString = urlString.replace(/^(?!(?:\w+:)?\/\/)|^\/\//, opts.defaultProtocol);
+		urlString = urlString.replace(/^(?!(?:\w+:)?\/\/)|^\/\//, options.defaultProtocol);
 	}
 
 	const urlObj = new URLParser(urlString);
 
-	if (opts.forceHttp && opts.forceHttps) {
+	if (options.forceHttp && options.forceHttps) {
 		throw new Error('The `forceHttp` and `forceHttps` options cannot be used together');
 	}
 
-	if (opts.forceHttp && urlObj.protocol === 'https:') {
+	if (options.forceHttp && urlObj.protocol === 'https:') {
 		urlObj.protocol = 'http:';
 	}
 
-	if (opts.forceHttps && urlObj.protocol === 'http:') {
+	if (options.forceHttps && urlObj.protocol === 'http:') {
 		urlObj.protocol = 'https:';
 	}
 
+	// Remove auth
+	if (options.stripAuthentication) {
+		urlObj.username = '';
+		urlObj.password = '';
+	}
+
 	// Remove hash
-	if (opts.stripHash) {
+	if (options.stripHash) {
 		urlObj.hash = '';
 	}
 
@@ -80,15 +88,15 @@ module.exports = (urlString, opts) => {
 	}
 
 	// Remove directory index
-	if (opts.removeDirectoryIndex === true) {
-		opts.removeDirectoryIndex = [/^index\.[a-z]+$/];
+	if (options.removeDirectoryIndex === true) {
+		options.removeDirectoryIndex = [/^index\.[a-z]+$/];
 	}
 
-	if (Array.isArray(opts.removeDirectoryIndex) && opts.removeDirectoryIndex.length > 0) {
+	if (Array.isArray(options.removeDirectoryIndex) && options.removeDirectoryIndex.length > 0) {
 		let pathComponents = urlObj.pathname.split('/');
 		const lastComponent = pathComponents[pathComponents.length - 1];
 
-		if (testParameter(lastComponent, opts.removeDirectoryIndex)) {
+		if (testParameter(lastComponent, options.removeDirectoryIndex)) {
 			pathComponents = pathComponents.slice(0, pathComponents.length - 1);
 			urlObj.pathname = pathComponents.slice(1).join('/') + '/';
 		}
@@ -99,8 +107,7 @@ module.exports = (urlString, opts) => {
 		urlObj.hostname = urlObj.hostname.replace(/\.$/, '');
 
 		// Remove `www.`
-		// eslint-disable-next-line no-useless-escape
-		if (opts.stripWWW && /^www\.([a-z\-\d]{2,63})\.([a-z\.]{2,5})$/.test(urlObj.hostname)) {
+		if (options.stripWWW && /^www\.([a-z\-\d]{2,63})\.([a-z.]{2,5})$/.test(urlObj.hostname)) {
 			// Each label should be max 63 at length (min: 2).
 			// The extension should be max 5 at length (min: 2).
 			// Source: https://en.wikipedia.org/wiki/Hostname#Restrictions_on_valid_host_names
@@ -109,16 +116,16 @@ module.exports = (urlString, opts) => {
 	}
 
 	// Remove query unwanted parameters
-	if (Array.isArray(opts.removeQueryParameters)) {
+	if (Array.isArray(options.removeQueryParameters)) {
 		for (const key of [...urlObj.searchParams.keys()]) {
-			if (testParameter(key, opts.removeQueryParameters)) {
+			if (testParameter(key, options.removeQueryParameters)) {
 				urlObj.searchParams.delete(key);
 			}
 		}
 	}
 
 	// Sort query parameters
-	if (opts.sortQueryParameters) {
+	if (options.sortQueryParameters) {
 		urlObj.searchParams.sort();
 	}
 
@@ -126,14 +133,19 @@ module.exports = (urlString, opts) => {
 	urlString = urlObj.toString();
 
 	// Remove ending `/`
-	if (opts.removeTrailingSlash || urlObj.pathname === '/') {
+	if (options.removeTrailingSlash || urlObj.pathname === '/') {
 		urlString = urlString.replace(/\/$/, '');
 	}
 
 	// Restore relative protocol, if applicable
-	if (hasRelativeProtocol && !opts.normalizeProtocol) {
+	if (hasRelativeProtocol && !options.normalizeProtocol) {
 		urlString = urlString.replace(/^http:\/\//, '//');
 	}
 
+	// Remove http/https
+	if (options.stripProtocol) {
+		urlString = urlString.replace(/^(?:https?:)?\/\//, '');
+	}
+
 	return urlString;
 };
diff --git a/package.json b/package.json
index 0bbfb04..6c48e23 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "normalize-url",
-	"version": "3.3.0",
+	"version": "4.0.0",
 	"description": "Normalize a URL",
 	"license": "MIT",
 	"repository": "sindresorhus/normalize-url",
@@ -10,7 +10,7 @@
 		"url": "sindresorhus.com"
 	},
 	"engines": {
-		"node": ">=6"
+		"node": ">=8"
 	},
 	"scripts": {
 		"test": "xo && nyc ava"
@@ -34,9 +34,9 @@
 		"canonical"
 	],
 	"devDependencies": {
-		"ava": "*",
+		"ava": "^0.25.0",
 		"coveralls": "^3.0.0",
-		"nyc": "^12.0.2",
-		"xo": "*"
+		"nyc": "^13.1.0",
+		"xo": "^0.23.0"
 	}
 }
diff --git a/readme.md b/readme.md
index d051aaf..f40153e 100644
--- a/readme.md
+++ b/readme.md
@@ -70,7 +70,7 @@ Normalizes `https:` URLs to `http:`.
 normalizeUrl('https://sindresorhus.com:80/');
 //=> 'https://sindresorhus.com'
 
-normalizeUrl('https://sindresorhus.com:80/', {normalizeHttps: true});
+normalizeUrl('https://sindresorhus.com:80/', {forceHttp: true});
 //=> 'http://sindresorhus.com'
 ```
 
@@ -85,25 +85,55 @@ Normalizes `http:` URLs to `https:`.
 normalizeUrl('https://sindresorhus.com:80/');
 //=> 'https://sindresorhus.com'
 
-normalizeUrl('http://sindresorhus.com:80/', {normalizeHttp: true});
+normalizeUrl('http://sindresorhus.com:80/', {forceHttps: true});
 //=> 'https://sindresorhus.com'
 ```
 
 This option can't be used with the `forceHttp` option at the same time.
 
-##### stripHash
+##### stripAuthentication
 
 Type: `boolean`<br>
 Default: `true`
 
+Strip the [authentication](https://en.wikipedia.org/wiki/Basic_access_authentication) part of a URL.
+
+```js
+normalizeUrl('user:password@sindresorhus.com');
+//=> 'https://sindresorhus.com'
+
+normalizeUrl('user:password@sindresorhus.com', {stripAuthentication: false});
+//=> 'https://user:password@sindresorhus.com'
+```
+
+##### stripHash
+
+Type: `boolean`<br>
+Default: `false`
+
 Removes hash from the URL.
 
 ```js
 normalizeUrl('sindresorhus.com/about.html#contact');
+//=> 'http://sindresorhus.com/about.html#contact'
+
+normalizeUrl('sindresorhus.com/about.html#contact', {stripHash: true});
 //=> 'http://sindresorhus.com/about.html'
+```
 
-normalizeUrl('sindresorhus.com/about.html#contact', {stripHash: false});
-//=> 'http://sindresorhus.com/about.html#contact'
+##### stripProtocol
+
+Type: `boolean`<br>
+Default: `false`
+
+Removes HTTP(S) protocol from an URL `http://sindresorhus.com` → `sindresorhus.com`.
+
+```js
+normalizeUrl('https://sindresorhus.com');
+//=> 'https://sindresorhus.com'
+
+normalizeUrl('sindresorhus.com', {stripProtocol: true});
+//=> 'sindresorhus.com'
 ```
 
 ##### stripWWW
@@ -114,11 +144,11 @@ Default: `true`
 Removes `www.` from the URL.
 
 ```js
-normalizeUrl('http://www.sindresorhus.com/about.html#contact');
-//=> 'http://sindresorhus.com/about.html#contact'
+normalizeUrl('http://www.sindresorhus.com');
+//=> 'http://sindresorhus.com'
 
-normalizeUrl('http://www.sindresorhus.com/about.html#contact', {stripWWW: false});
-//=> 'http://www.sindresorhus.com/about.html#contact'
+normalizeUrl('http://www.sindresorhus.com', {stripWWW: false});
+//=> 'http://www.sindresorhus.com'
 ```
 
 ##### removeQueryParameters
diff --git a/test.js b/test.js
index 510ec27..9333d35 100644
--- a/test.js
+++ b/test.js
@@ -1,176 +1,193 @@
 import test from 'ava';
-import m from '.';
+import normalizeUrl from '.';
 
 test('main', t => {
-	t.is(m('sindresorhus.com'), 'http://sindresorhus.com');
-	t.is(m('sindresorhus.com '), 'http://sindresorhus.com');
-	t.is(m('sindresorhus.com.'), 'http://sindresorhus.com');
-	t.is(m('sindresorhus.com', {defaultProtocol: 'https:'}), 'https://sindresorhus.com');
-	t.is(m('HTTP://sindresorhus.com'), 'http://sindresorhus.com');
-	t.is(m('//sindresorhus.com'), 'http://sindresorhus.com');
-	t.is(m('http://sindresorhus.com'), 'http://sindresorhus.com');
-	t.is(m('http://sindresorhus.com:80'), 'http://sindresorhus.com');
-	t.is(m('https://sindresorhus.com:443'), 'https://sindresorhus.com');
-	t.is(m('ftp://sindresorhus.com:21'), 'ftp://sindresorhus.com');
-	t.is(m('http://www.sindresorhus.com'), 'http://sindresorhus.com');
-	t.is(m('www.com'), 'http://www.com');
-	t.is(m('http://www.www.sindresorhus.com'), 'http://www.www.sindresorhus.com');
-	t.is(m('www.sindresorhus.com'), 'http://sindresorhus.com');
-	t.is(m('http://sindresorhus.com/foo/'), 'http://sindresorhus.com/foo');
-	t.is(m('sindresorhus.com/?foo=bar baz'), 'http://sindresorhus.com/?foo=bar+baz');
-	t.is(m('https://foo.com/https://bar.com'), 'https://foo.com/https://bar.com');
-	t.is(m('https://foo.com/https://bar.com/foo//bar'), 'https://foo.com/https://bar.com/foo/bar');
-	t.is(m('https://foo.com/http://bar.com'), 'https://foo.com/http://bar.com');
-	t.is(m('https://foo.com/http://bar.com/foo//bar'), 'https://foo.com/http://bar.com/foo/bar');
-	t.is(m('http://sindresorhus.com/%7Efoo/'), 'http://sindresorhus.com/~foo', 'decode URI octets');
-	t.is(m('http://sindresorhus.com/?'), 'http://sindresorhus.com');
-	t.is(m('êxample.com'), 'http://xn--xample-hva.com');
-	t.is(m('http://sindresorhus.com/?b=bar&a=foo'), 'http://sindresorhus.com/?a=foo&b=bar');
-	t.is(m('http://sindresorhus.com/?foo=bar*|<>:"'), 'http://sindresorhus.com/?foo=bar*%7C%3C%3E%3A%22');
-	t.is(m('http://sindresorhus.com:5000'), 'http://sindresorhus.com:5000');
-	t.is(m('http://sindresorhus.com////foo/bar'), 'http://sindresorhus.com/foo/bar');
-	t.is(m('http://sindresorhus.com////foo////bar'), 'http://sindresorhus.com/foo/bar');
-	t.is(m('//sindresorhus.com/', {normalizeProtocol: false}), '//sindresorhus.com');
-	t.is(m('//sindresorhus.com:80/', {normalizeProtocol: false}), '//sindresorhus.com');
-	t.is(m('http://sindresorhus.com/foo#bar'), 'http://sindresorhus.com/foo');
-	t.is(m('http://sindresorhus.com/foo#bar', {stripHash: false}), 'http://sindresorhus.com/foo#bar');
-	t.is(m('http://sindresorhus.com/foo/bar/../baz'), 'http://sindresorhus.com/foo/baz');
-	t.is(m('http://sindresorhus.com/foo/bar/./baz'), 'http://sindresorhus.com/foo/bar/baz');
-	t.is(m('sindre://www.sorhus.com'), 'sindre://sorhus.com');
-	t.is(m('sindre://www.sorhus.com/'), 'sindre://sorhus.com');
-	t.is(m('sindre://www.sorhus.com/foo/bar'), 'sindre://sorhus.com/foo/bar');
-	t.is(m('https://i.vimeocdn.com/filter/overlay?src0=https://i.vimeocdn.com/video/598160082_1280x720.jpg&src1=https://f.vimeocdn.com/images_v6/share/play_icon_overlay.png'), 'https://i.vimeocdn.com/filter/overlay?src0=https%3A%2F%2Fi.vimeocdn.com%2Fvideo%2F598160082_1280x720.jpg&src1=https%3A%2F%2Ff.vimeocdn.com%2Fimages_v6%2Fshare%2Fplay_icon_overlay.png');
+	t.is(normalizeUrl('sindresorhus.com'), 'http://sindresorhus.com');
+	t.is(normalizeUrl('sindresorhus.com '), 'http://sindresorhus.com');
+	t.is(normalizeUrl('sindresorhus.com.'), 'http://sindresorhus.com');
+	t.is(normalizeUrl('sindresorhus.com', {defaultProtocol: 'https:'}), 'https://sindresorhus.com');
+	t.is(normalizeUrl('HTTP://sindresorhus.com'), 'http://sindresorhus.com');
+	t.is(normalizeUrl('//sindresorhus.com'), 'http://sindresorhus.com');
+	t.is(normalizeUrl('http://sindresorhus.com'), 'http://sindresorhus.com');
+	t.is(normalizeUrl('http://sindresorhus.com:80'), 'http://sindresorhus.com');
+	t.is(normalizeUrl('https://sindresorhus.com:443'), 'https://sindresorhus.com');
+	t.is(normalizeUrl('ftp://sindresorhus.com:21'), 'ftp://sindresorhus.com');
+	t.is(normalizeUrl('http://www.sindresorhus.com'), 'http://sindresorhus.com');
+	t.is(normalizeUrl('www.com'), 'http://www.com');
+	t.is(normalizeUrl('http://www.www.sindresorhus.com'), 'http://www.www.sindresorhus.com');
+	t.is(normalizeUrl('www.sindresorhus.com'), 'http://sindresorhus.com');
+	t.is(normalizeUrl('http://sindresorhus.com/foo/'), 'http://sindresorhus.com/foo');
+	t.is(normalizeUrl('sindresorhus.com/?foo=bar baz'), 'http://sindresorhus.com/?foo=bar+baz');
+	t.is(normalizeUrl('https://foo.com/https://bar.com'), 'https://foo.com/https://bar.com');
+	t.is(normalizeUrl('https://foo.com/https://bar.com/foo//bar'), 'https://foo.com/https://bar.com/foo/bar');
+	t.is(normalizeUrl('https://foo.com/http://bar.com'), 'https://foo.com/http://bar.com');
+	t.is(normalizeUrl('https://foo.com/http://bar.com/foo//bar'), 'https://foo.com/http://bar.com/foo/bar');
+	t.is(normalizeUrl('http://sindresorhus.com/%7Efoo/'), 'http://sindresorhus.com/~foo', 'decode URI octets');
+	t.is(normalizeUrl('http://sindresorhus.com/?'), 'http://sindresorhus.com');
+	t.is(normalizeUrl('êxample.com'), 'http://xn--xample-hva.com');
+	t.is(normalizeUrl('http://sindresorhus.com/?b=bar&a=foo'), 'http://sindresorhus.com/?a=foo&b=bar');
+	t.is(normalizeUrl('http://sindresorhus.com/?foo=bar*|<>:"'), 'http://sindresorhus.com/?foo=bar*%7C%3C%3E%3A%22');
+	t.is(normalizeUrl('http://sindresorhus.com:5000'), 'http://sindresorhus.com:5000');
+	t.is(normalizeUrl('http://sindresorhus.com////foo/bar'), 'http://sindresorhus.com/foo/bar');
+	t.is(normalizeUrl('http://sindresorhus.com////foo////bar'), 'http://sindresorhus.com/foo/bar');
+	t.is(normalizeUrl('//sindresorhus.com/', {normalizeProtocol: false}), '//sindresorhus.com');
+	t.is(normalizeUrl('//sindresorhus.com:80/', {normalizeProtocol: false}), '//sindresorhus.com');
+	t.is(normalizeUrl('http://sindresorhus.com/foo#bar'), 'http://sindresorhus.com/foo#bar');
+	t.is(normalizeUrl('http://sindresorhus.com/foo#bar', {stripHash: true}), 'http://sindresorhus.com/foo');
+	t.is(normalizeUrl('http://sindresorhus.com/foo/bar/../baz'), 'http://sindresorhus.com/foo/baz');
+	t.is(normalizeUrl('http://sindresorhus.com/foo/bar/./baz'), 'http://sindresorhus.com/foo/bar/baz');
+	t.is(normalizeUrl('sindre://www.sorhus.com'), 'sindre://sorhus.com');
+	t.is(normalizeUrl('sindre://www.sorhus.com/'), 'sindre://sorhus.com');
+	t.is(normalizeUrl('sindre://www.sorhus.com/foo/bar'), 'sindre://sorhus.com/foo/bar');
+	t.is(normalizeUrl('https://i.vimeocdn.com/filter/overlay?src0=https://i.vimeocdn.com/video/598160082_1280x720.jpg&src1=https://f.vimeocdn.com/images_v6/share/play_icon_overlay.png'), 'https://i.vimeocdn.com/filter/overlay?src0=https%3A%2F%2Fi.vimeocdn.com%2Fvideo%2F598160082_1280x720.jpg&src1=https%3A%2F%2Ff.vimeocdn.com%2Fimages_v6%2Fshare%2Fplay_icon_overlay.png');
+	t.is(normalizeUrl('http://user:password@www.sindresorhus.com'), 'http://sindresorhus.com');
+	t.is(normalizeUrl('https://user:password@www.sindresorhus.com'), 'https://sindresorhus.com');
+	t.is(normalizeUrl('https://user:password@www.sindresorhus.com/@user'), 'https://sindresorhus.com/@user');
+	t.is(normalizeUrl('user:password@sindresorhus.com'), 'http://sindresorhus.com');
+	t.is(normalizeUrl('http://user:password@www.êxample.com'), 'http://xn--xample-hva.com');
+	t.is(normalizeUrl('sindre://user:password@www.sorhus.com'), 'sindre://sorhus.com');
 });
 
-test('backwards compatibility', t => {
-	t.is(m('http://sindresorhus.com/foo#bar', {stripFragment: false}), 'http://sindresorhus.com/foo#bar');
-	t.is(m('https://sindresorhus.com', {normalizeHttps: true}), 'http://sindresorhus.com');
-	t.is(m('http://sindresorhus.com', {normalizeHttp: true}), 'https://sindresorhus.com');
+test('stripAuthentication option', t => {
+	const options = {stripAuthentication: false};
+	t.is(normalizeUrl('http://user:password@www.sindresorhus.com', options), 'http://user:password@sindresorhus.com');
+	t.is(normalizeUrl('https://user:password@www.sindresorhus.com', options), 'https://user:password@sindresorhus.com');
+	t.is(normalizeUrl('https://user:password@www.sindresorhus.com/@user', options), 'https://user:password@sindresorhus.com/@user');
+	t.is(normalizeUrl('user:password@sindresorhus.com', options), 'http://user:password@sindresorhus.com');
+	t.is(normalizeUrl('http://user:password@www.êxample.com', options), 'http://user:password@xn--xample-hva.com');
+	t.is(normalizeUrl('sindre://user:password@www.sorhus.com', options), 'sindre://user:password@sorhus.com');
+});
+
+test('stripProtocol option', t => {
+	const options = {stripProtocol: true};
+	t.is(normalizeUrl('http://www.sindresorhus.com', options), 'sindresorhus.com');
+	t.is(normalizeUrl('http://sindresorhus.com', options), 'sindresorhus.com');
+	t.is(normalizeUrl('https://www.sindresorhus.com', options), 'sindresorhus.com');
+	t.is(normalizeUrl('//www.sindresorhus.com', options), 'sindresorhus.com');
+	t.is(normalizeUrl('sindre://user:password@www.sorhus.com', options), 'sindre://sorhus.com');
+	t.is(normalizeUrl('sindre://www.sorhus.com', options), 'sindre://sorhus.com');
 });
 
 test('stripWWW option', t => {
-	const opts = {stripWWW: false};
-	t.is(m('http://www.sindresorhus.com', opts), 'http://www.sindresorhus.com');
-	t.is(m('www.sindresorhus.com', opts), 'http://www.sindresorhus.com');
-	t.is(m('http://www.êxample.com', opts), 'http://www.xn--xample-hva.com');
-	t.is(m('sindre://www.sorhus.com', opts), 'sindre://www.sorhus.com');
+	const options = {stripWWW: false};
+	t.is(normalizeUrl('http://www.sindresorhus.com', options), 'http://www.sindresorhus.com');
+	t.is(normalizeUrl('www.sindresorhus.com', options), 'http://www.sindresorhus.com');
+	t.is(normalizeUrl('http://www.êxample.com', options), 'http://www.xn--xample-hva.com');
+	t.is(normalizeUrl('sindre://www.sorhus.com', options), 'sindre://www.sorhus.com');
 });
 
 test('removeQueryParameters option', t => {
-	const opts = {
+	const options = {
 		stripWWW: false,
 		removeQueryParameters: [/^utm_\w+/i, 'ref']
 	};
-	t.is(m('www.sindresorhus.com?foo=bar&utm_medium=test'), 'http://sindresorhus.com/?foo=bar');
-	t.is(m('http://www.sindresorhus.com', opts), 'http://www.sindresorhus.com');
-	t.is(m('www.sindresorhus.com?foo=bar', opts), 'http://www.sindresorhus.com/?foo=bar');
-	t.is(m('www.sindresorhus.com?foo=bar&utm_medium=test&ref=test_ref', opts), 'http://www.sindresorhus.com/?foo=bar');
+	t.is(normalizeUrl('www.sindresorhus.com?foo=bar&utm_medium=test'), 'http://sindresorhus.com/?foo=bar');
+	t.is(normalizeUrl('http://www.sindresorhus.com', options), 'http://www.sindresorhus.com');
+	t.is(normalizeUrl('www.sindresorhus.com?foo=bar', options), 'http://www.sindresorhus.com/?foo=bar');
+	t.is(normalizeUrl('www.sindresorhus.com?foo=bar&utm_medium=test&ref=test_ref', options), 'http://www.sindresorhus.com/?foo=bar');
 });
 
 test('forceHttp option', t => {
-	const opts = {forceHttp: true};
-
-	t.is(m('https://sindresorhus.com'), 'https://sindresorhus.com');
-	t.is(m('http://sindresorhus.com', opts), 'http://sindresorhus.com');
-	t.is(m('https://www.sindresorhus.com', opts), 'http://sindresorhus.com');
-	t.is(m('//sindresorhus.com', opts), 'http://sindresorhus.com');
+	const options = {forceHttp: true};
+	t.is(normalizeUrl('https://sindresorhus.com'), 'https://sindresorhus.com');
+	t.is(normalizeUrl('http://sindresorhus.com', options), 'http://sindresorhus.com');
+	t.is(normalizeUrl('https://www.sindresorhus.com', options), 'http://sindresorhus.com');
+	t.is(normalizeUrl('//sindresorhus.com', options), 'http://sindresorhus.com');
 });
 
 test('forceHttp option with forceHttps', t => {
 	t.throws(() => {
-		m('https://www.sindresorhus.com', {forceHttp: true, forceHttps: true});
+		normalizeUrl('https://www.sindresorhus.com', {forceHttp: true, forceHttps: true});
 	}, 'The `forceHttp` and `forceHttps` options cannot be used together');
 });
 
 test('forceHttps option', t => {
-	const opts = {forceHttps: true};
-
-	t.is(m('https://sindresorhus.com'), 'https://sindresorhus.com');
-	t.is(m('http://sindresorhus.com', opts), 'https://sindresorhus.com');
-	t.is(m('https://www.sindresorhus.com', opts), 'https://sindresorhus.com');
-	t.is(m('//sindresorhus.com', opts), 'https://sindresorhus.com');
+	const options = {forceHttps: true};
+	t.is(normalizeUrl('https://sindresorhus.com'), 'https://sindresorhus.com');
+	t.is(normalizeUrl('http://sindresorhus.com', options), 'https://sindresorhus.com');
+	t.is(normalizeUrl('https://www.sindresorhus.com', options), 'https://sindresorhus.com');
+	t.is(normalizeUrl('//sindresorhus.com', options), 'https://sindresorhus.com');
 });
 
 test('removeTrailingSlash option', t => {
-	const opts = {removeTrailingSlash: false};
-	t.is(m('http://sindresorhus.com/'), 'http://sindresorhus.com');
-	t.is(m('http://sindresorhus.com/', opts), 'http://sindresorhus.com');
-	t.is(m('http://sindresorhus.com/redirect/'), 'http://sindresorhus.com/redirect');
-	t.is(m('http://sindresorhus.com/redirect/', opts), 'http://sindresorhus.com/redirect/');
+	const options = {removeTrailingSlash: false};
+	t.is(normalizeUrl('http://sindresorhus.com/'), 'http://sindresorhus.com');
+	t.is(normalizeUrl('http://sindresorhus.com/', options), 'http://sindresorhus.com');
+	t.is(normalizeUrl('http://sindresorhus.com/redirect/'), 'http://sindresorhus.com/redirect');
+	t.is(normalizeUrl('http://sindresorhus.com/redirect/', options), 'http://sindresorhus.com/redirect/');
 });
 
 test('removeDirectoryIndex option', t => {
-	const opts1 = {removeDirectoryIndex: ['index.html', 'index.php']};
-	t.is(m('http://sindresorhus.com/index.html'), 'http://sindresorhus.com/index.html');
-	t.is(m('http://sindresorhus.com/index.html', opts1), 'http://sindresorhus.com');
-	t.is(m('http://sindresorhus.com/index.htm', opts1), 'http://sindresorhus.com/index.htm');
-	t.is(m('http://sindresorhus.com/index.php', opts1), 'http://sindresorhus.com');
-	t.is(m('http://sindresorhus.com/path/index.html'), 'http://sindresorhus.com/path/index.html');
-	t.is(m('http://sindresorhus.com/path/index.html', opts1), 'http://sindresorhus.com/path');
-	t.is(m('http://sindresorhus.com/path/index.htm', opts1), 'http://sindresorhus.com/path/index.htm');
-	t.is(m('http://sindresorhus.com/path/index.php', opts1), 'http://sindresorhus.com/path');
-	t.is(m('http://sindresorhus.com/foo/bar/index.html', opts1), 'http://sindresorhus.com/foo/bar');
-
-	const opts2 = {removeDirectoryIndex: [/^index\.[a-z]+$/, 'remove.html']};
-	t.is(m('http://sindresorhus.com/index.html'), 'http://sindresorhus.com/index.html');
-	t.is(m('http://sindresorhus.com/index.html', opts2), 'http://sindresorhus.com');
-	t.is(m('http://sindresorhus.com/index/index.html', opts2), 'http://sindresorhus.com/index');
-	t.is(m('http://sindresorhus.com/remove.html', opts2), 'http://sindresorhus.com');
-	t.is(m('http://sindresorhus.com/default.htm', opts2), 'http://sindresorhus.com/default.htm');
-	t.is(m('http://sindresorhus.com/index.php', opts2), 'http://sindresorhus.com');
-
-	const opts3 = {removeDirectoryIndex: true};
-	t.is(m('http://sindresorhus.com/index.html'), 'http://sindresorhus.com/index.html');
-	t.is(m('http://sindresorhus.com/index.html', opts3), 'http://sindresorhus.com');
-	t.is(m('http://sindresorhus.com/index.htm', opts3), 'http://sindresorhus.com');
-	t.is(m('http://sindresorhus.com/index.php', opts3), 'http://sindresorhus.com');
+	const options1 = {removeDirectoryIndex: ['index.html', 'index.php']};
+	t.is(normalizeUrl('http://sindresorhus.com/index.html'), 'http://sindresorhus.com/index.html');
+	t.is(normalizeUrl('http://sindresorhus.com/index.html', options1), 'http://sindresorhus.com');
+	t.is(normalizeUrl('http://sindresorhus.com/index.htm', options1), 'http://sindresorhus.com/index.htm');
+	t.is(normalizeUrl('http://sindresorhus.com/index.php', options1), 'http://sindresorhus.com');
+	t.is(normalizeUrl('http://sindresorhus.com/path/index.html'), 'http://sindresorhus.com/path/index.html');
+	t.is(normalizeUrl('http://sindresorhus.com/path/index.html', options1), 'http://sindresorhus.com/path');
+	t.is(normalizeUrl('http://sindresorhus.com/path/index.htm', options1), 'http://sindresorhus.com/path/index.htm');
+	t.is(normalizeUrl('http://sindresorhus.com/path/index.php', options1), 'http://sindresorhus.com/path');
+	t.is(normalizeUrl('http://sindresorhus.com/foo/bar/index.html', options1), 'http://sindresorhus.com/foo/bar');
+
+	const options2 = {removeDirectoryIndex: [/^index\.[a-z]+$/, 'remove.html']};
+	t.is(normalizeUrl('http://sindresorhus.com/index.html'), 'http://sindresorhus.com/index.html');
+	t.is(normalizeUrl('http://sindresorhus.com/index.html', options2), 'http://sindresorhus.com');
+	t.is(normalizeUrl('http://sindresorhus.com/index/index.html', options2), 'http://sindresorhus.com/index');
+	t.is(normalizeUrl('http://sindresorhus.com/remove.html', options2), 'http://sindresorhus.com');
+	t.is(normalizeUrl('http://sindresorhus.com/default.htm', options2), 'http://sindresorhus.com/default.htm');
+	t.is(normalizeUrl('http://sindresorhus.com/index.php', options2), 'http://sindresorhus.com');
+
+	const options3 = {removeDirectoryIndex: true};
+	t.is(normalizeUrl('http://sindresorhus.com/index.html'), 'http://sindresorhus.com/index.html');
+	t.is(normalizeUrl('http://sindresorhus.com/index.html', options3), 'http://sindresorhus.com');
+	t.is(normalizeUrl('http://sindresorhus.com/index.htm', options3), 'http://sindresorhus.com');
+	t.is(normalizeUrl('http://sindresorhus.com/index.php', options3), 'http://sindresorhus.com');
 });
 
 test('removeTrailingSlash and removeDirectoryIndex options)', t => {
-	const opts1 = {
+	const options1 = {
 		removeTrailingSlash: true,
 		removeDirectoryIndex: true
 	};
-	t.is(m('http://sindresorhus.com/path/', opts1), 'http://sindresorhus.com/path');
-	t.is(m('http://sindresorhus.com/path/index.html', opts1), 'http://sindresorhus.com/path');
+	t.is(normalizeUrl('http://sindresorhus.com/path/', options1), 'http://sindresorhus.com/path');
+	t.is(normalizeUrl('http://sindresorhus.com/path/index.html', options1), 'http://sindresorhus.com/path');
 
-	const opts2 = {
+	const options2 = {
 		removeTrailingSlash: false,
 		removeDirectoryIndex: true
 	};
-	t.is(m('http://sindresorhus.com/path/', opts2), 'http://sindresorhus.com/path/');
-	t.is(m('http://sindresorhus.com/path/index.html', opts2), 'http://sindresorhus.com/path/');
+	t.is(normalizeUrl('http://sindresorhus.com/path/', options2), 'http://sindresorhus.com/path/');
+	t.is(normalizeUrl('http://sindresorhus.com/path/index.html', options2), 'http://sindresorhus.com/path/');
 });
 
 test('sortQueryParameters option', t => {
-	let opts = {
+	const options1 = {
 		sortQueryParameters: true
 	};
-	t.is(m('http://sindresorhus.com/?a=Z&b=Y&c=X&d=W', opts), 'http://sindresorhus.com/?a=Z&b=Y&c=X&d=W');
-	t.is(m('http://sindresorhus.com/?b=Y&c=X&a=Z&d=W', opts), 'http://sindresorhus.com/?a=Z&b=Y&c=X&d=W');
-	t.is(m('http://sindresorhus.com/?a=Z&d=W&b=Y&c=X', opts), 'http://sindresorhus.com/?a=Z&b=Y&c=X&d=W');
-	t.is(m('http://sindresorhus.com/', opts), 'http://sindresorhus.com');
+	t.is(normalizeUrl('http://sindresorhus.com/?a=Z&b=Y&c=X&d=W', options1), 'http://sindresorhus.com/?a=Z&b=Y&c=X&d=W');
+	t.is(normalizeUrl('http://sindresorhus.com/?b=Y&c=X&a=Z&d=W', options1), 'http://sindresorhus.com/?a=Z&b=Y&c=X&d=W');
+	t.is(normalizeUrl('http://sindresorhus.com/?a=Z&d=W&b=Y&c=X', options1), 'http://sindresorhus.com/?a=Z&b=Y&c=X&d=W');
+	t.is(normalizeUrl('http://sindresorhus.com/', options1), 'http://sindresorhus.com');
 
-	opts = {
+	const options2 = {
 		sortQueryParameters: false
 	};
-
-	t.is(m('http://sindresorhus.com/?a=Z&b=Y&c=X&d=W', opts), 'http://sindresorhus.com/?a=Z&b=Y&c=X&d=W');
-	t.is(m('http://sindresorhus.com/?b=Y&c=X&a=Z&d=W', opts), 'http://sindresorhus.com/?b=Y&c=X&a=Z&d=W');
-	t.is(m('http://sindresorhus.com/?a=Z&d=W&b=Y&c=X', opts), 'http://sindresorhus.com/?a=Z&d=W&b=Y&c=X');
-	t.is(m('http://sindresorhus.com/', opts), 'http://sindresorhus.com');
+	t.is(normalizeUrl('http://sindresorhus.com/?a=Z&b=Y&c=X&d=W', options2), 'http://sindresorhus.com/?a=Z&b=Y&c=X&d=W');
+	t.is(normalizeUrl('http://sindresorhus.com/?b=Y&c=X&a=Z&d=W', options2), 'http://sindresorhus.com/?b=Y&c=X&a=Z&d=W');
+	t.is(normalizeUrl('http://sindresorhus.com/?a=Z&d=W&b=Y&c=X', options2), 'http://sindresorhus.com/?a=Z&d=W&b=Y&c=X');
+	t.is(normalizeUrl('http://sindresorhus.com/', options2), 'http://sindresorhus.com');
 });
 
 test('invalid urls', t => {
 	t.throws(() => {
-		m('http://');
+		normalizeUrl('http://');
 	}, 'Invalid URL: http://');
 
 	t.throws(() => {
-		m('/');
+		normalizeUrl('/');
 	}, 'Invalid URL: /');
 
 	t.throws(() => {
-		m('/relative/path/');
+		normalizeUrl('/relative/path/');
 	}, 'Invalid URL: /relative/path/');
 });