diff --git a/test/checks/visibility/hidden-content.js b/test/checks/visibility/hidden-content.js
index 32e10e5203..89c04d7070 100644
--- a/test/checks/visibility/hidden-content.js
+++ b/test/checks/visibility/hidden-content.js
@@ -1,7 +1,7 @@
 describe('hidden content', function () {
 	'use strict';
 
-  var fixture = document.getElementById('fixture');
+	var fixture = document.getElementById('fixture');
 
 	var checkContext = {
 		_data: null,
@@ -12,7 +12,7 @@ describe('hidden content', function () {
 
 	function checkSetup (html, options, target) {
 		fixture.innerHTML = html;
-    axe._tree = axe.utils.getFlattenedTree(fixture);
+		axe._tree = axe.utils.getFlattenedTree(fixture);
 		var node = fixture.querySelector(target || '#target');
 		var virtualNode = axe.utils.getNodeFromTree(axe._tree[0], node);
 		return [node, options, virtualNode];
@@ -25,17 +25,17 @@ describe('hidden content', function () {
 	});
 
 	it('should return undefined with display:none and children', function () {
-    var params = checkSetup('<div id="target" style="display: none;"><p>Some paragraph text.</p></div>');
+		var params = checkSetup('<div id="target" style="display: none;"><p>Some paragraph text.</p></div>');
 		assert.isUndefined(checks['hidden-content'].evaluate.apply(checkContext, params));
 	});
 
 	it('should return undefined with visibility:hidden and children', function () {
-    var params = checkSetup('<div id="target" style="visibility: hidden;"><p>Some paragraph text.</p></div>');
+		var params = checkSetup('<div id="target" style="visibility: hidden;"><p>Some paragraph text.</p></div>');
 		assert.isUndefined(checks['hidden-content'].evaluate.apply(checkContext, params));
 	});
 
 	it('should return true with visibility:hidden and parent with visibility:hidden', function () {
-    var params = checkSetup('<div style="visibility: hidden;"><p id="target" style="visibility: hidden;">Some paragraph text.</p></div>');
+		var params = checkSetup('<div style="visibility: hidden;"><p id="target" style="visibility: hidden;">Some paragraph text.</p></div>');
 		assert.isTrue(checks['hidden-content'].evaluate.apply(checkContext, params));
 	});
 
@@ -46,7 +46,7 @@ describe('hidden content', function () {
 
 	it('should skip whitelisted elements', function () {
 		var node = document.querySelector('head');
-    axe._tree = axe.utils.getFlattenedTree(document.documentElement);
+		axe._tree = axe.utils.getFlattenedTree(document.documentElement);
 		var virtualNode = axe.utils.getNodeFromTree(axe._tree[0], node);
 		assert.isTrue(checks['hidden-content'].evaluate.call(checkContext, node, undefined, virtualNode));
 	});