diff --git a/src/index.js b/src/index.js
index 376d660..b9160a8 100644
--- a/src/index.js
+++ b/src/index.js
@@ -3,25 +3,25 @@ import postcss from 'postcss';
 const filter = (filter, attributeSelector) => new RegExp(filter.map(attribut => `^\\[${attribut}`).join('|')).test(attributeSelector);
 
 export default postcss.plugin('postcss-attribute-selector-prefix', options => {
-	return nodes => {
-		return nodes.walkRules(rule => {
-			rule.selector = rule.selector.replace(/\[.*?]/g, match => {
-				if (options.prefix === undefined) {
-					return match;
-				}
+  return nodes => {
+    return nodes.walkRules(rule => {
+      rule.selector = rule.selector.replace(/\[.*?]/g, match => {
+        if (options.prefix === undefined) {
+          return match;
+        }
 
-				if (options.filter !== undefined && filter(options.filter, match) === false) {
-					return match;
-				}
+        if (options.filter !== undefined && filter(options.filter, match) === false) {
+          return match;
+        }
 
-				if (options.ignore !== undefined && filter(options.ignore, match) === true) {
-					return match;
-				}
+        if (options.ignore !== undefined && filter(options.ignore, match) === true) {
+          return match;
+        }
 
-				return match.replace(/(\[.*?="?)(.*?)("?])/, (match, before, requireds, after) => {
-					return `${before}${requireds.split(' ').map(required => options.prefix + required).join(' ')}${after}`;
-				});
-			});
-		});
-	};
+        return match.replace(/(\[.*?="?)(.*?)("?])/, (match, before, requireds, after) => {
+          return `${before}${requireds.split(' ').map(required => options.prefix + required).join(' ')}${after}`;
+        });
+      });
+    });
+  };
 });
diff --git a/test/test-plugin.js b/test/test-plugin.js
index f9e678b..3b6c988 100644
--- a/test/test-plugin.js
+++ b/test/test-plugin.js
@@ -1,74 +1,74 @@
 import test from 'ava';
 import postcss from 'postcss';
-import plugin from '../src/';
+import plugin from '../src';
 
 const processing = (inputCSS, options) => postcss([plugin(options)]).process(inputCSS).css;
 
 test('processing not options and not attribute selector', t => {
-	const expected = '.class, .test { color:red; }';
-	const fixtures = '.class, .test { color:red; }';
-	t.is(processing(fixtures), expected);
+  const expected = '.class, .test { color:red; }';
+  const fixtures = '.class, .test { color:red; }';
+  t.is(processing(fixtures), expected);
 });
 
 test('processing options prefix and not attribute selector', t => {
-	const expected = '.class { color:red; }';
-	const fixtures = '.class { color:red; }';
-	t.is(processing(fixtures, {prefix: 'test-'}), expected);
+  const expected = '.class { color:red; }';
+  const fixtures = '.class { color:red; }';
+  t.is(processing(fixtures, {prefix: 'test-'}), expected);
 });
 
 test('processing options prefix multiple', t => {
-	const expected = '.class, [type="test-text"], [class*="test-lorem-1 test-lorem-2"], [id^="test-myID"] { color:red; }';
-	const fixtures = '.class, [type="text"], [class*="lorem-1 lorem-2"], [id^="myID"] { color:red; }';
-	t.is(processing(fixtures, {prefix: 'test-'}), expected);
+  const expected = '.class, [type="test-text"], [class*="test-lorem-1 test-lorem-2"], [id^="test-myID"] { color:red; }';
+  const fixtures = '.class, [type="text"], [class*="lorem-1 lorem-2"], [id^="myID"] { color:red; }';
+  t.is(processing(fixtures, {prefix: 'test-'}), expected);
 });
 
 test('processing options prefix and attribute selector', t => {
-	const expected = '.class, [type="test-text"] { color:red; }';
-	const fixtures = '.class, [type="text"] { color:red; }';
-	t.is(processing(fixtures, {prefix: 'test-'}), expected);
+  const expected = '.class, [type="test-text"] { color:red; }';
+  const fixtures = '.class, [type="text"] { color:red; }';
+  t.is(processing(fixtures, {prefix: 'test-'}), expected);
 });
 
 test('processing options prefix, filter and attribute selector', t => {
-	const expected = '.class, [type="text"], [class*="test-lorem"] { color:red; }';
-	const fixtures = '.class, [type="text"], [class*="lorem"] { color:red; }';
-	t.is(processing(fixtures, {
-		prefix: 'test-',
-		filter: ['class']
-	}), expected);
+  const expected = '.class, [type="text"], [class*="test-lorem"] { color:red; }';
+  const fixtures = '.class, [type="text"], [class*="lorem"] { color:red; }';
+  t.is(processing(fixtures, {
+    prefix: 'test-',
+    filter: ['class']
+  }), expected);
 });
 
 test('processing options prefix, filter and attribute selector witch indentical class filter', t => {
-	const expected = '.class, [type="text"], [alt*="class"] { color:red; }';
-	const fixtures = '.class, [type="text"], [alt*="class"] { color:red; }';
-	t.is(processing(fixtures, {
-		prefix: 'test-',
-		filter: ['class']
-	}), expected);
+  const expected = '.class, [type="text"], [alt*="class"] { color:red; }';
+  const fixtures = '.class, [type="text"], [alt*="class"] { color:red; }';
+  t.is(processing(fixtures, {
+    prefix: 'test-',
+    filter: ['class']
+  }), expected);
 });
 
 test('processing options filter and attribute selector', t => {
-	const expected = '.class, [type="text"], [class*="lorem"] { color:red; }';
-	const fixtures = '.class, [type="text"], [class*="lorem"] { color:red; }';
-	t.is(processing(fixtures, {
-		filter: ['class']
-	}), expected);
+  const expected = '.class, [type="text"], [class*="lorem"] { color:red; }';
+  const fixtures = '.class, [type="text"], [class*="lorem"] { color:red; }';
+  t.is(processing(fixtures, {
+    filter: ['class']
+  }), expected);
 });
 
 test('processing options prefix, filter, ignore and attribute selector', t => {
-	const expected = '.class, [type="text"], [class*="lorem"] { color:red; }';
-	const fixtures = '.class, [type="text"], [class*="lorem"] { color:red; }';
-	t.is(processing(fixtures, {
-		prefix: 'test',
-		filter: ['class'],
-		ignore: ['class']
-	}), expected);
+  const expected = '.class, [type="text"], [class*="lorem"] { color:red; }';
+  const fixtures = '.class, [type="text"], [class*="lorem"] { color:red; }';
+  t.is(processing(fixtures, {
+    prefix: 'test',
+    filter: ['class'],
+    ignore: ['class']
+  }), expected);
 });
 
 test('processing options prefix, ignore and attribute selector', t => {
-	const expected = '.class, [type="text"], [class*="test-lorem"] { color:red; }';
-	const fixtures = '.class, [type="text"], [class*="lorem"] { color:red; }';
-	t.is(processing(fixtures, {
-		prefix: 'test-',
-		ignore: ['type']
-	}), expected);
+  const expected = '.class, [type="text"], [class*="test-lorem"] { color:red; }';
+  const fixtures = '.class, [type="text"], [class*="lorem"] { color:red; }';
+  t.is(processing(fixtures, {
+    prefix: 'test-',
+    ignore: ['type']
+  }), expected);
 });