Build: Migrate from JSHint & JSCS to ESLint

Fixes #15393
Closes gh-1958

103 files changed, 249 insertions, 164 deletions

diff --git a/tests/.eslintrc.json b/tests/.eslintrc.json
new file mode 100644
index 000000000..714077182
--- /dev/null
+++ b/tests/.eslintrc.json
@@ -0,0 +1,26 @@
+{
+	"parserOptions": {
+		"ecmaVersion": 5
+	},
+
+	"env": {
+		"browser": true,
+		"jquery": true,
+		"node": false
+	},
+
+	"rules": {
+		// Too many violations:
+		"max-len": "off",
+		"no-unused-vars": "off",
+		"strict": "off" // ideally, `[ "error", "function" ]`
+	},
+
+	"globals": {
+		"define": false,
+		"Globalize": false,
+		"QUnit": false,
+		"require": true,
+		"requirejs": true
+	}
+}
diff --git a/tests/.jshintrc b/tests/.jshintrc
deleted file mode 100644
index 6bdcee94d..000000000
--- a/tests/.jshintrc
+++ /dev/null
@@ -1,28 +0,0 @@
-{
-	"boss": true,
-	"curly": true,
-	"eqeqeq": true,
-	"eqnull": true,
-	"expr": true,
-	"immed": true,
-	"noarg": true,
-	"quotmark": "double",
-	"smarttabs": true,
-	"trailing": true,
-	"undef": true,
-	"unused": true,
-
-	"browser": true,
-	"es3": true,
-	"evil": true,
-	"jquery": true,
-
-	"globals": {
-		"define": false,
-		"Globalize": false,
-		"QUnit": false,
-		"require": true,
-		"requirejs": true,
-		"JSHINT": false
-	}
-}
diff --git a/tests/lib/bootstrap.js b/tests/lib/bootstrap.js
index 5dcc2702e..fff019332 100644
--- a/tests/lib/bootstrap.js
+++ b/tests/lib/bootstrap.js
@@ -1,4 +1,5 @@
 ( function() {
+"use strict";
 
 var DEFAULT_JQUERY_VERSION = "1.12.4";
 
@@ -9,7 +10,6 @@ requirejs.config( {
 		"jquery": jqueryUrl(),
 		"jquery-migrate": migrateUrl(),
 		"jquery-simulate": "../../../external/jquery-simulate/jquery.simulate",
-		"jshint": "../../../external/jshint/jshint",
 		"lib": "../../lib",
 		"phantom-bridge": "../../../node_modules/grunt-contrib-qunit/phantomjs/bridge",
 		"qunit-assert-classes": "../../../external/qunit-assert-classes/qunit-assert-classes",
@@ -128,7 +128,7 @@ function migrateUrl() {
 		url = "../../../external/jquery-migrate-1.4.1/jquery-migrate";
 	} else if ( jqueryVersion === "custom" ) {
 		if ( parseUrl().migrate ) {
-			throw new Error ( "Migrate not currently supported for custom build" );
+			throw new Error( "Migrate not currently supported for custom build" );
 		}
 	} else {
 		throw new Error( "No migrate version known for jQuery " + jqueryVersion );
diff --git a/tests/lib/common.js b/tests/lib/common.js
index dbb9eea8b..56b7a3ff3 100644
--- a/tests/lib/common.js
+++ b/tests/lib/common.js
@@ -3,6 +3,7 @@ define( [
 	"jquery",
 	"lib/helper"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 var exports = {};
 
@@ -69,7 +70,6 @@ function testBasicUsage( widget ) {
 exports.testWidget = function( widget, settings ) {
 	QUnit.module( widget + ": common widget", { afterEach: helper.moduleAfterEach } );
 
-	exports.testJshint( "/widgets/" + widget );
 	testWidgetDefaults( widget, settings.defaults );
 	testWidgetOverrides( widget );
 	if ( !settings.noDefaultElement ) {
@@ -81,58 +81,6 @@ exports.testWidget = function( widget, settings ) {
 	} );
 };
 
-exports.testJshint = function( module ) {
-
-	// Function.prototype.bind check is needed because JSHint doesn't work in ES3 browsers anymore
-	// https://github.com/jshint/jshint/issues/1384
-	if ( QUnit.urlParams.nojshint || !Function.prototype.bind ) {
-		return;
-	}
-
-	QUnit.test( "JSHint", function( assert ) {
-		var ready = assert.async();
-		require( [ "jshint" ], function() {
-			assert.expect( 1 );
-
-			$.when(
-				$.ajax( {
-					url: "../../../ui/.jshintrc",
-					dataType: "json"
-				} ),
-				$.ajax( {
-					url: "../../../ui/" + module + ".js",
-					dataType: "text"
-				} )
-			)
-				.done( function( hintArgs, srcArgs ) {
-					var globals, passed, errors,
-						jshintrc = hintArgs[ 0 ],
-						source = srcArgs[ 0 ];
-
-					globals = jshintrc.globals || {};
-					delete jshintrc.globals;
-					passed = JSHINT( source, jshintrc, globals );
-					errors = $.map( JSHINT.errors, function( error ) {
-
-						// JSHINT may report null if there are too many errors
-						if ( !error ) {
-							return;
-						}
-
-						return "[L" + error.line + ":C" + error.character + "] " +
-							error.reason + "\n" + error.evidence + "\n";
-					} ).join( "\n" );
-					assert.ok( passed, errors );
-					ready();
-				} )
-				.fail( function( hintError, srcError ) {
-					assert.ok( false, "error loading source: " + ( hintError || srcError ).statusText );
-					ready();
-				} );
-		} );
-	} );
-};
-
 return exports;
 
 } );
diff --git a/tests/lib/css.js b/tests/lib/css.js
index ab707ad2a..bd7fb49ad 100644
--- a/tests/lib/css.js
+++ b/tests/lib/css.js
@@ -1,4 +1,5 @@
 ( function() {
+"use strict";
 
 function includeStyle( url ) {
 	document.write( "<link rel='stylesheet' href='../../../" + url + "'>" );
diff --git a/tests/lib/qunit-assert-domequal.js b/tests/lib/qunit-assert-domequal.js
index 26c131137..bdad9844c 100644
--- a/tests/lib/qunit-assert-domequal.js
+++ b/tests/lib/qunit-assert-domequal.js
@@ -8,6 +8,7 @@ define( [
 	"qunit",
 	"jquery"
 ], function( QUnit, $ ) {
+"use strict";
 
 var domEqual = QUnit.assert.domEqual = function( selector, modifier, message ) {
 
diff --git a/tests/lib/qunit.js b/tests/lib/qunit.js
index 1395e7c84..425f0fc8f 100644
--- a/tests/lib/qunit.js
+++ b/tests/lib/qunit.js
@@ -6,17 +6,12 @@ define( [
 	"lib/qunit-assert-domequal",
 	"phantom-bridge"
 ], function( QUnit, $ ) {
+"use strict";
 
 QUnit.config.autostart = false;
 QUnit.config.requireExpects = true;
 
 QUnit.config.urlConfig.push( {
-	id: "nojshint",
-	label: "Skip JSHint",
-	tooltip: "Skip running JSHint, e.g., within TestSwarm, where Jenkins runs it already"
-} );
-
-QUnit.config.urlConfig.push( {
 	id: "jquery",
 	label: "jQuery version",
 	value: [
diff --git a/tests/unit/accordion/core.js b/tests/unit/accordion/core.js
index ad7177b8f..7436ba7a9 100644
--- a/tests/unit/accordion/core.js
+++ b/tests/unit/accordion/core.js
@@ -4,6 +4,7 @@ define( [
 	"./helper",
 	"ui/widgets/accordion"
 ], function( QUnit, $, testHelper ) {
+"use strict";
 
 var beforeAfterEach = testHelper.beforeAfterEach,
 	state = testHelper.state;
diff --git a/tests/unit/accordion/events.js b/tests/unit/accordion/events.js
index 5b8525132..2c5e791a1 100644
--- a/tests/unit/accordion/events.js
+++ b/tests/unit/accordion/events.js
@@ -4,6 +4,7 @@ define( [
 	"./helper",
 	"ui/widgets/accordion"
 ], function( QUnit, $, testHelper ) {
+"use strict";
 
 var beforeAfterEach = testHelper.beforeAfterEach,
 	state = testHelper.state;
diff --git a/tests/unit/accordion/helper.js b/tests/unit/accordion/helper.js
index 3211765af..b50c389e2 100644
--- a/tests/unit/accordion/helper.js
+++ b/tests/unit/accordion/helper.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/accordion"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 return $.extend( helper, {
 	equalHeight: function( assert, accordion, height ) {
diff --git a/tests/unit/accordion/methods.js b/tests/unit/accordion/methods.js
index 622235785..e4ab62ffb 100644
--- a/tests/unit/accordion/methods.js
+++ b/tests/unit/accordion/methods.js
@@ -4,6 +4,7 @@ define( [
 	"./helper",
 	"ui/widgets/accordion"
 ], function( QUnit, $, testHelper ) {
+"use strict";
 
 var equalHeight = testHelper.equalHeight,
 	beforeAfterEach = testHelper.beforeAfterEach,
diff --git a/tests/unit/accordion/options.js b/tests/unit/accordion/options.js
index ae53e5c45..00c1d0361 100644
--- a/tests/unit/accordion/options.js
+++ b/tests/unit/accordion/options.js
@@ -4,6 +4,7 @@ define( [
 	"./helper",
 	"ui/widgets/accordion"
 ], function( QUnit, $, testHelper ) {
+"use strict";
 
 var equalHeight = testHelper.equalHeight,
 	beforeAfterEach = testHelper.beforeAfterEach,
diff --git a/tests/unit/autocomplete/core.js b/tests/unit/autocomplete/core.js
index 8768ec2af..d78db3bb9 100644
--- a/tests/unit/autocomplete/core.js
+++ b/tests/unit/autocomplete/core.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/autocomplete"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "autocomplete: core", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/autocomplete/events.js b/tests/unit/autocomplete/events.js
index 801c2d935..d08fe9828 100644
--- a/tests/unit/autocomplete/events.js
+++ b/tests/unit/autocomplete/events.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/autocomplete"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "autocomplete: events", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/autocomplete/methods.js b/tests/unit/autocomplete/methods.js
index 597c9c2ad..cb0f95332 100644
--- a/tests/unit/autocomplete/methods.js
+++ b/tests/unit/autocomplete/methods.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/autocomplete"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "autocomplete: methods", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/autocomplete/options.js b/tests/unit/autocomplete/options.js
index c4de8d5d3..b66a71577 100644
--- a/tests/unit/autocomplete/options.js
+++ b/tests/unit/autocomplete/options.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/autocomplete"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "autocomplete: options", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/button/core.js b/tests/unit/button/core.js
index d5d19f953..7b696631e 100644
--- a/tests/unit/button/core.js
+++ b/tests/unit/button/core.js
@@ -5,6 +5,7 @@ define( [
 	"ui/safe-active-element",
 	"ui/widgets/button"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "Button: core", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/button/deprecated.js b/tests/unit/button/deprecated.js
index 6866f7371..e1e617608 100644
--- a/tests/unit/button/deprecated.js
+++ b/tests/unit/button/deprecated.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/button"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "Button (deprecated): core", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/button/events.js b/tests/unit/button/events.js
index 577407361..a5d02a127 100644
--- a/tests/unit/button/events.js
+++ b/tests/unit/button/events.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/button"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "Button: events", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/button/methods.js b/tests/unit/button/methods.js
index 80ce27b39..71909f87f 100644
--- a/tests/unit/button/methods.js
+++ b/tests/unit/button/methods.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/button"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "Button: methods", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/button/options.js b/tests/unit/button/options.js
index 8a9acd60b..601b66f3d 100644
--- a/tests/unit/button/options.js
+++ b/tests/unit/button/options.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/button"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "button: options", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/checkboxradio/core.js b/tests/unit/checkboxradio/core.js
index b16c09408..8b0e1de8e 100644
--- a/tests/unit/checkboxradio/core.js
+++ b/tests/unit/checkboxradio/core.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/checkboxradio"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "Checkboxradio: core", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/checkboxradio/events.js b/tests/unit/checkboxradio/events.js
index 0760a4387..0604fffac 100644
--- a/tests/unit/checkboxradio/events.js
+++ b/tests/unit/checkboxradio/events.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/checkboxradio"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "Checkboxradio: events", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/checkboxradio/methods.js b/tests/unit/checkboxradio/methods.js
index bfb30dbce..09510ec71 100644
--- a/tests/unit/checkboxradio/methods.js
+++ b/tests/unit/checkboxradio/methods.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/checkboxradio"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "Checkboxradio: methods", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/checkboxradio/options.js b/tests/unit/checkboxradio/options.js
index 256381da6..e2869ddbd 100644
--- a/tests/unit/checkboxradio/options.js
+++ b/tests/unit/checkboxradio/options.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/checkboxradio"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "Checkboxradio: options", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/controlgroup/core.js b/tests/unit/controlgroup/core.js
index baccb3b16..d5cc5c732 100644
--- a/tests/unit/controlgroup/core.js
+++ b/tests/unit/controlgroup/core.js
@@ -8,6 +8,7 @@ define( [
 	"ui/widgets/button",
 	"ui/widgets/spinner"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "Controlgroup: Core", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/controlgroup/methods.js b/tests/unit/controlgroup/methods.js
index 8f1f58947..8ac310c25 100644
--- a/tests/unit/controlgroup/methods.js
+++ b/tests/unit/controlgroup/methods.js
@@ -8,6 +8,7 @@ define( [
 	"ui/widgets/button",
 	"ui/widgets/spinner"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "Controlgroup: methods", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/controlgroup/options.js b/tests/unit/controlgroup/options.js
index 4fc870675..31be89b27 100644
--- a/tests/unit/controlgroup/options.js
+++ b/tests/unit/controlgroup/options.js
@@ -8,6 +8,7 @@ define( [
 	"ui/widgets/button",
 	"ui/widgets/spinner"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "Controlgroup: options", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/core/core.js b/tests/unit/core/core.js
index 94c126123..d9677a406 100644
--- a/tests/unit/core/core.js
+++ b/tests/unit/core/core.js
@@ -7,11 +7,10 @@ define( [
 	"ui/labels",
 	"ui/unique-id"
 ], function( QUnit, $, common, helper ) {
+"use strict";
 
 QUnit.module( "core - jQuery extensions", { afterEach: helper.moduleAfterEach }  );
 
-common.testJshint( "core" );
-
 QUnit.test( "innerWidth - getter", function( assert ) {
 	assert.expect( 2 );
 	var el = $( "#dimensions" );
diff --git a/tests/unit/core/selector.js b/tests/unit/core/selector.js
index 61f4a2381..314cfd570 100644
--- a/tests/unit/core/selector.js
+++ b/tests/unit/core/selector.js
@@ -6,6 +6,7 @@ define( [
 	"ui/focusable",
 	"ui/tabbable"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "core - selectors", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/datepicker/core.js b/tests/unit/datepicker/core.js
index 2c4b77402..74320931e 100644
--- a/tests/unit/datepicker/core.js
+++ b/tests/unit/datepicker/core.js
@@ -7,6 +7,7 @@ define( [
 	"ui/widgets/datepicker",
 	"ui/i18n/datepicker-he"
 ], function( QUnit, $, common, helper, testHelper ) {
+"use strict";
 
 QUnit.module( "datepicker: core", {
 	beforeEach: function() {
@@ -15,8 +16,6 @@ QUnit.module( "datepicker: core", {
 	afterEach: helper.moduleAfterEach
 } );
 
-common.testJshint( "widgets/datepicker" );
-
 QUnit.test( "initialization - Reinitialization after body had been emptied.", function( assert ) {
 	assert.expect( 1 );
 	var bodyContent = $( "body" ).children(), inp = $( "#inp" );
@@ -57,7 +56,7 @@ QUnit.test( "baseStructure", function( assert ) {
 			assert.ok( header.is( "div.ui-datepicker-header" ), "Structure - header division" );
 			assert.equal( header.children().length, 3, "Structure - header child count" );
 			assert.ok( header.children().first().is( "a.ui-datepicker-prev" ) && header.children().first().html() !== "", "Structure - prev link" );
-			assert.ok( header.children().eq( 1 ).is( "a.ui-datepicker-next" ) && header.children().eq ( 1 ).html() !== "", "Structure - next link" );
+			assert.ok( header.children().eq( 1 ).is( "a.ui-datepicker-next" ) && header.children().eq( 1 ).html() !== "", "Structure - next link" );
 
 			title = header.children().last();
 			assert.ok( title.is( "div.ui-datepicker-title" ) && title.html() !== "", "Structure - title division" );
diff --git a/tests/unit/datepicker/events.js b/tests/unit/datepicker/events.js
index 44064ee21..50ee07b86 100644
--- a/tests/unit/datepicker/events.js
+++ b/tests/unit/datepicker/events.js
@@ -4,6 +4,7 @@ define( [
 	"./helper",
 	"ui/widgets/datepicker"
 ], function( QUnit, $, testHelper ) {
+"use strict";
 
 var beforeAfterEach = testHelper.beforeAfterEach;
 
@@ -136,8 +137,12 @@ QUnit.test( "events", function( assert ) {
 
 QUnit.test( "beforeShowDay-getDate", function( assert ) {
 	assert.expect( 3 );
-	var inp = testHelper.init( "#inp", { beforeShowDay: function() { inp.datepicker( "getDate" ); return [ true, "" ]; } } ),
-		dp = $( "#ui-datepicker-div" );
+	var inp = testHelper.init( "#inp", {
+		beforeShowDay: function() {
+			inp.datepicker( "getDate" ); return [ true, "" ];
+		}
+	} );
+	var dp = $( "#ui-datepicker-div" );
 	inp.val( "01/01/2010" ).datepicker( "show" );
 
 	// Contains non-breaking space
diff --git a/tests/unit/datepicker/helper.js b/tests/unit/datepicker/helper.js
index 85485ddf4..652609d54 100644
--- a/tests/unit/datepicker/helper.js
+++ b/tests/unit/datepicker/helper.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/datepicker"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 return $.extend( helper, {
 	addMonths: function( date, offset ) {
diff --git a/tests/unit/datepicker/methods.js b/tests/unit/datepicker/methods.js
index fed04ccdd..32d611748 100644
--- a/tests/unit/datepicker/methods.js
+++ b/tests/unit/datepicker/methods.js
@@ -4,6 +4,7 @@ define( [
 	"./helper",
 	"ui/widgets/datepicker"
 ], function( QUnit, $, testHelper ) {
+"use strict";
 
 var beforeAfterEach = testHelper.beforeAfterEach;
 
diff --git a/tests/unit/datepicker/options.js b/tests/unit/datepicker/options.js
index 51ed93b71..50260d816 100644
--- a/tests/unit/datepicker/options.js
+++ b/tests/unit/datepicker/options.js
@@ -8,6 +8,7 @@ define( [
 	"ui/i18n/datepicker-zh-CN",
 	"ui/ie"
 ], function( QUnit, $, testHelper ) {
+"use strict";
 
 var beforeAfterEach = testHelper.beforeAfterEach;
 
@@ -902,7 +903,7 @@ QUnit.test( "localisation", function( assert ) {
 	assert.expect( 24 );
 	var dp, month, day, date,
 		inp = testHelper.init( "#inp", $.datepicker.regional.fr );
-	inp.datepicker( "option", { dateFormat: "DD, d MM yy", showButtonPanel:true, changeMonth:true, changeYear:true } ).val( "" ).datepicker( "show" );
+	inp.datepicker( "option", { dateFormat: "DD, d MM yy", showButtonPanel: true, changeMonth: true, changeYear: true } ).val( "" ).datepicker( "show" );
 	dp = $( "#ui-datepicker-div" );
 	assert.equal( $( ".ui-datepicker-close", dp ).text(), "Fermer", "Localisation - close" );
 	$( ".ui-datepicker-close", dp ).simulate( "mouseover" );
@@ -1039,50 +1040,85 @@ QUnit.test( "parseDateErrors", function( assert ) {
 		try {
 			expr();
 			assert.ok( false, "Parsed error " + value );
-		}
-		catch ( e ) {
+		} catch ( e ) {
 			assert.equal( e, error, "Parsed error " + value );
 		}
 	}
-	expectError( function() { $.datepicker.parseDate( null, "Sat 2 01" ); },
+	expectError( function() {
+		$.datepicker.parseDate( null, "Sat 2 01" );
+	},
 		"Sat 2 01", "Invalid arguments" );
-	expectError( function() { $.datepicker.parseDate( "d m y", null ); },
+	expectError( function() {
+		$.datepicker.parseDate( "d m y", null );
+	},
 		"null", "Invalid arguments" );
-	expectError( function() { $.datepicker.parseDate( "d m y", "Sat 2 01" ); },
+	expectError( function() {
+		$.datepicker.parseDate( "d m y", "Sat 2 01" );
+	},
 		"Sat 2 01 - d m y", "Missing number at position 0" );
-	expectError( function() { $.datepicker.parseDate( "dd mm yy", "Sat 2 01" ); },
+	expectError( function() {
+		$.datepicker.parseDate( "dd mm yy", "Sat 2 01" );
+	},
 		"Sat 2 01 - dd mm yy", "Missing number at position 0" );
-	expectError( function() { $.datepicker.parseDate( "d m y", "3 Feb 01" ); },
+	expectError( function() {
+		$.datepicker.parseDate( "d m y", "3 Feb 01" );
+	},
 		"3 Feb 01 - d m y", "Missing number at position 2" );
-	expectError( function() { $.datepicker.parseDate( "dd mm yy", "3 Feb 01" ); },
+	expectError( function() {
+		$.datepicker.parseDate( "dd mm yy", "3 Feb 01" );
+	},
 		"3 Feb 01 - dd mm yy", "Missing number at position 2" );
-	expectError( function() { $.datepicker.parseDate( "mm dd yy", "2 1 01" ); },
+	expectError( function() {
+		$.datepicker.parseDate( "mm dd yy", "2 1 01" );
+	},
 		"2 1 01 - dd mm yy", "Missing number at position 4" );
-	expectError( function() { $.datepicker.parseDate( "d m y", "3 2 AD01" ); },
+	expectError( function() {
+		$.datepicker.parseDate( "d m y", "3 2 AD01" );
+	},
 		"3 2 AD01 - d m y", "Missing number at position 4" );
-	expectError( function() { $.datepicker.parseDate( "d m yy", "3 2 AD01" ); },
+	expectError( function() {
+		$.datepicker.parseDate( "d m yy", "3 2 AD01" );
+	},
 		"3 2 AD01 - dd mm yy", "Missing number at position 4" );
-	expectError( function() { $.datepicker.parseDate( "y-o", "01-D01" ); },
+	expectError( function() {
+		$.datepicker.parseDate( "y-o", "01-D01" );
+	},
 		"2001-D01 - y-o", "Missing number at position 3" );
-	expectError( function() { $.datepicker.parseDate( "yy-oo", "2001-D01" ); },
+	expectError( function() {
+		$.datepicker.parseDate( "yy-oo", "2001-D01" );
+	},
 		"2001-D01 - yy-oo", "Missing number at position 5" );
-	expectError( function() { $.datepicker.parseDate( "D d M y", "D7 3 Feb 01" ); },
+	expectError( function() {
+		$.datepicker.parseDate( "D d M y", "D7 3 Feb 01" );
+	},
 		"D7 3 Feb 01 - D d M y", "Unknown name at position 0" );
-	expectError( function() { $.datepicker.parseDate( "D d M y", "Sat 3 M2 01" ); },
+	expectError( function() {
+		$.datepicker.parseDate( "D d M y", "Sat 3 M2 01" );
+	},
 		"Sat 3 M2 01 - D d M y", "Unknown name at position 6" );
-	expectError( function() { $.datepicker.parseDate( "DD, MM d, yy", "Saturday- Feb 3, 2001" ); },
+	expectError( function() {
+		$.datepicker.parseDate( "DD, MM d, yy", "Saturday- Feb 3, 2001" );
+	},
 		"Saturday- Feb 3, 2001 - DD, MM d, yy", "Unexpected literal at position 8" );
-	expectError( function() { $.datepicker.parseDate( "'day' d 'of' MM (''DD''), yy",
-		"day 3 of February (\"Saturday\"), 2001" ); },
+	expectError( function() {
+		$.datepicker.parseDate( "'day' d 'of' MM (''DD''), yy",
+			"day 3 of February (\"Saturday\"), 2001" );
+	},
 		"day 3 of Mon2 ('Day7'), 2001", "Unexpected literal at position 19" );
-	expectError( function() { $.datepicker.parseDate( "d m y", "29 2 01" ); },
+	expectError( function() {
+		$.datepicker.parseDate( "d m y", "29 2 01" );
+	},
 		"29 2 01 - d m y", "Invalid date" );
 	fr = $.datepicker.regional.fr;
 	settings = { dayNamesShort: fr.dayNamesShort, dayNames: fr.dayNames,
 		monthNamesShort: fr.monthNamesShort, monthNames: fr.monthNames };
-	expectError( function() { $.datepicker.parseDate( "D d M y", "Mon 9 Avr 01", settings ); },
+	expectError( function() {
+		$.datepicker.parseDate( "D d M y", "Mon 9 Avr 01", settings );
+	},
 		"Mon 9 Avr 01 - D d M y", "Unknown name at position 0" );
-	expectError( function() { $.datepicker.parseDate( "D d M y", "Lun. 9 Apr 01", settings ); },
+	expectError( function() {
+		$.datepicker.parseDate( "D d M y", "Lun. 9 Apr 01", settings );
+	},
 		"Lun. 9 Apr 01 - D d M y", "Unknown name at position 7" );
 } );
 
@@ -1092,7 +1128,7 @@ QUnit.test( "Ticket #7244: date parser does not fail when too many numbers are p
 	try {
 		date = $.datepicker.parseDate( "dd/mm/yy", "18/04/19881" );
 		assert.ok( false, "Did not properly detect an invalid date" );
-	}catch ( e ) {
+	} catch ( e ) {
 		assert.ok( "invalid date detected" );
 	}
 
diff --git a/tests/unit/dialog/core.js b/tests/unit/dialog/core.js
index 171d2789e..cb0ee53e0 100644
--- a/tests/unit/dialog/core.js
+++ b/tests/unit/dialog/core.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/dialog"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 // TODO add afterEach callback to remove dialogs
 QUnit.module( "dialog: core", { afterEach: helper.moduleAfterEach }  );
@@ -209,8 +210,7 @@ QUnit.test( "focus tabbable", function( assert ) {
 			function( done ) {
 				var inputs = element.find( "input"
 					);
-				assert.equal
-				( document.activeElement, inputs[ 1 ],  "Focus starts on second input" );
+				assert.equal( document.activeElement, inputs[ 1 ],  "Focus starts on second input" );
 				inputs.last().simulate( "keydown", { keyCode: $.ui.keyCode.TAB } );
 				setTimeout( function() {
 					assert.equal( document.activeElement, inputs[ 0 ],
@@ -275,7 +275,7 @@ QUnit.test( "#9048: multiple modal dialogs opened and closed in different order"
 	function( assert )  {
 	var ready = assert.async();
 	assert.expect( 1 );
-	$( "#dialog1, #dialog2" ).dialog( { autoOpen: false, modal:true } );
+	$( "#dialog1, #dialog2" ).dialog( { autoOpen: false, modal: true } );
 	$( "#dialog1" ).dialog( "open" );
 	$( "#dialog2" ).dialog( "open" );
 	$( "#dialog1" ).dialog( "close" );
@@ -311,9 +311,7 @@ QUnit.test( "interaction between overlay and other dialogs", function( assert )
 	// Wait for the modal to init
 	setTimeout( function() {
 
-		second.
-		testWidget
-		( "open" );
+		second.testWidget( "open" );
 
 		// Simulate user  tabbing  from address bar to an element outside the dialog
 		$( "#favorite-animal" ).trigger( "focus" );
diff --git a/tests/unit/dialog/deprecated.js b/tests/unit/dialog/deprecated.js
index ab49fe756..b8cf7a9a5 100644
--- a/tests/unit/dialog/deprecated.js
+++ b/tests/unit/dialog/deprecated.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/dialog"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "dialog (deprecated): options", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/dialog/events.js b/tests/unit/dialog/events.js
index a98d1396d..eb77de2ff 100644
--- a/tests/unit/dialog/events.js
+++ b/tests/unit/dialog/events.js
@@ -4,6 +4,7 @@ define( [
 	"./helper",
 	"ui/widgets/dialog"
 ], function( QUnit, $, testHelper ) {
+"use strict";
 
 QUnit.module( "dialog: events", { afterEach: testHelper.moduleAfterEach }  );
 
diff --git a/tests/unit/dialog/helper.js b/tests/unit/dialog/helper.js
index ac013ecfc..55555626a 100644
--- a/tests/unit/dialog/helper.js
+++ b/tests/unit/dialog/helper.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/dialog"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 return $.extend( helper, {
 	drag: function( element, handle, dx, dy ) {
diff --git a/tests/unit/dialog/methods.js b/tests/unit/dialog/methods.js
index e289d81a7..5d01f223d 100644
--- a/tests/unit/dialog/methods.js
+++ b/tests/unit/dialog/methods.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/dialog"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "dialog: methods", {
 	afterEach: function() {
@@ -68,7 +69,7 @@ QUnit.test( "destroy", function( assert ) {
 	assert.equal( $( ".ui-widget-overlay" ).length, 0, "overlay does not exist" );
 	assert.equal( $( document ).data( "ui-dialog-overlays" ), undefined, "ui-dialog-overlays equals the number of open overlays" );
 
-	element = $( "#dialog1" ).dialog( { modal: true } ),
+	element = $( "#dialog1" ).dialog( { modal: true } );
 	element2 = $( "#dialog2" ).dialog( { modal: true } );
 	assert.equal( $( ".ui-widget-overlay" ).length, 2, "overlays created when dialogs are open" );
 	assert.equal( $( document ).data( "ui-dialog-overlays" ), 2, "ui-dialog-overlays equals the number of open overlays" );
@@ -86,7 +87,7 @@ QUnit.test( "destroy", function( assert ) {
 QUnit.test( "#9000: Dialog leaves broken event handler after close/destroy in certain cases", function( assert ) {
 	var ready = assert.async();
 	assert.expect( 1 );
-	$( "#dialog1" ).dialog( { modal:true } ).dialog( "close" ).dialog( "destroy" );
+	$( "#dialog1" ).dialog( { modal: true } ).dialog( "close" ).dialog( "destroy" );
 	setTimeout( function() {
 		$( "#favorite-animal" ).trigger( "focus" );
 		assert.ok( true, "close and destroy modal dialog before its really opened" );
diff --git a/tests/unit/dialog/options.js b/tests/unit/dialog/options.js
index 078d32f8d..2de788a44 100644
--- a/tests/unit/dialog/options.js
+++ b/tests/unit/dialog/options.js
@@ -7,6 +7,7 @@ define( [
 	"ui/effects/effect-blind",
 	"ui/effects/effect-explode"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 QUnit.module( "dialog: options", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/draggable/core.js b/tests/unit/draggable/core.js
index b5dec8104..9cfbb1853 100644
--- a/tests/unit/draggable/core.js
+++ b/tests/unit/draggable/core.js
@@ -7,6 +7,7 @@ define( [
 	"ui/widgets/droppable",
 	"ui/widgets/resizable"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 QUnit.module( "draggable: core", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/draggable/events.js b/tests/unit/draggable/events.js
index c25754923..97ec912ae 100644
--- a/tests/unit/draggable/events.js
+++ b/tests/unit/draggable/events.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/draggable"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 var element;
 
diff --git a/tests/unit/draggable/helper.js b/tests/unit/draggable/helper.js
index de5dc4a6b..c1920f23b 100644
--- a/tests/unit/draggable/helper.js
+++ b/tests/unit/draggable/helper.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/draggable"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 return $.extend( helper, {
 
diff --git a/tests/unit/draggable/methods.js b/tests/unit/draggable/methods.js
index 19c7424a0..93f826faf 100644
--- a/tests/unit/draggable/methods.js
+++ b/tests/unit/draggable/methods.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/draggable"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 var element;
 
diff --git a/tests/unit/draggable/options.js b/tests/unit/draggable/options.js
index b4f5620d6..499454a65 100644
--- a/tests/unit/draggable/options.js
+++ b/tests/unit/draggable/options.js
@@ -7,6 +7,7 @@ define( [
 	"ui/widgets/droppable",
 	"ui/widgets/sortable"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 QUnit.module( "draggable: options", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/droppable/core.js b/tests/unit/droppable/core.js
index 80764711e..5cc6771f9 100644
--- a/tests/unit/droppable/core.js
+++ b/tests/unit/droppable/core.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/droppable"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 QUnit.module( "droppable: core", { afterEach: helper.moduleAfterEach }  );
 
@@ -20,7 +21,9 @@ QUnit.test( "element types", function( assert ) {
 		var typeName = typeNames[ i ],
 			el = $( document.createElement( typeName ) ).appendTo( "body" );
 
-		( typeName === "table" && el.append( "<tr><td>content</td></tr>" ) );
+		if ( typeName === "table" ) {
+			el.append( "<tr><td>content</td></tr>" );
+		}
 		el.droppable();
 		testHelper.shouldDrop( assert );
 		el.droppable( "destroy" );
diff --git a/tests/unit/droppable/events.js b/tests/unit/droppable/events.js
index 734aee1db..8b2bbd38e 100644
--- a/tests/unit/droppable/events.js
+++ b/tests/unit/droppable/events.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/droppable"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "droppable: events", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/droppable/helper.js b/tests/unit/droppable/helper.js
index f6bf9e411..2cf1b5c53 100644
--- a/tests/unit/droppable/helper.js
+++ b/tests/unit/droppable/helper.js
@@ -3,6 +3,7 @@ define( [
 	"jquery",
 	"lib/helper"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 return $.extend( helper, {
 	shouldDrop: function( assert ) {
diff --git a/tests/unit/droppable/methods.js b/tests/unit/droppable/methods.js
index 3a078224a..96df6ea40 100644
--- a/tests/unit/droppable/methods.js
+++ b/tests/unit/droppable/methods.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/droppable"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 QUnit.module( "droppable: methods", { afterEach: helper.moduleAfterEach }  );
 
@@ -61,7 +62,7 @@ QUnit.test( "enable", function( assert ) {
 	assert.equal( el.droppable( "option", "disabled" ), false, "disabled option setter" );
 	testHelper.shouldDrop( assert );
 
-	expected = $( "<div></div>" ).droppable(),
+	expected = $( "<div></div>" ).droppable();
 	actual = expected.droppable( "enable" );
 	assert.equal( actual, expected, "enable is chainable" );
 } );
diff --git a/tests/unit/droppable/options.js b/tests/unit/droppable/options.js
index 560de09fe..7cc765cf5 100644
--- a/tests/unit/droppable/options.js
+++ b/tests/unit/droppable/options.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/droppable"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "droppable: options", { afterEach: helper.moduleAfterEach }  );
 
@@ -80,6 +81,7 @@ QUnit.test( "scope", function( assert ) {
 	assert.equal( draggableOffset.left, oldDraggableOffset.left );
 	assert.equal( draggableOffset.top, oldDraggableOffset.top );
 } );
+
 /*
 Test( "greedy", function() {
 	ok(false, 'missing test - untested code is broken code');
diff --git a/tests/unit/effects/core.js b/tests/unit/effects/core.js
index b2d039a54..187f5355a 100644
--- a/tests/unit/effects/core.js
+++ b/tests/unit/effects/core.js
@@ -20,6 +20,7 @@ define( [
 	"ui/effects/effect-slide",
 	"ui/effects/effect-transfer"
 ], function( QUnit, $, common, helper ) {
+"use strict";
 
 QUnit.assert.present = function( value, array, message ) {
 	this.push( jQuery.inArray( value, array ) !== -1, value, array, message );
@@ -268,7 +269,7 @@ QUnit.test( "createPlaceholder: preserves layout affecting properties", function
 	assert.deepEqual( before.position.top - position, placeholder.position().top, "position top preserved" );
 	assert.deepEqual( before.position.left - position, placeholder.position().left, "position left preserved" );
 
-	assert.deepEqual( before[ "float" ], placeholder.css( "float" ), "float preserved" );
+	assert.deepEqual( before.float, placeholder.css( "float" ), "float preserved" );
 	assert.deepEqual( before.outerWidth, placeholder.outerWidth( true ), "width preserved" );
 	assert.deepEqual( before.outerHeight, placeholder.outerHeight( true ), "height preserved" );
 } );
@@ -304,8 +305,6 @@ QUnit.test( "transfer() with callback", function( assert ) {
 $.each( $.effects.effect, function( effect ) {
 	QUnit.module( "effects." + effect );
 
-	common.testJshint( "effects/effect-" + effect );
-
 	if ( effect === "transfer" ) {
 		return;
 	}
diff --git a/tests/unit/effects/scale.js b/tests/unit/effects/scale.js
index c6b0c9aa3..e5300028d 100644
--- a/tests/unit/effects/scale.js
+++ b/tests/unit/effects/scale.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/effects/effect-scale"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "effect.scale: Scale", { afterEach: helper.moduleAfterEach }  );
 
@@ -34,8 +35,20 @@ function run( position, v, h, vo, ho ) {
 
 		css[ h ] = 33;
 		css[ v ] = 33;
-		target[ h ] = h === ho ? css[ h ] : ho === "center" ? css[ h ] - 35 : css[ h ] - 70;
-		target[ v ] = v === vo ? css[ v ] : vo === "middle" ? css[ v ] - 35 : css[ v ] - 70;
+		if ( h === ho ) {
+			target[ h ] = css[ h ];
+		} else if ( ho === "center" ) {
+			target[ h ] = css[ h ] - 35;
+		} else {
+			target[ h ] = css[ h ] - 70;
+		}
+		if ( v === vo ) {
+			target[ v ] = css[ v ];
+		} else if ( vo === "middle" ) {
+			target[ v ] = css[ v ] - 35;
+		} else {
+			target[ v ] = css[ v ] - 70;
+		}
 		if ( relative && h === "right" ) {
 			target[ h ] += 70;
 		}
@@ -51,6 +64,7 @@ function suite( position ) {
 	run( position, "top", "left", "top", "left" );
 	run( position, "top", "left", "middle", "center" );
 	run( position, "top", "left", "bottom", "right" );
+
 	/* Firefox is currently not capable of supporting detection of bottom and right....
 	run( position, "bottom", "right", "top", "left" );
 	run( position, "bottom", "right", "middle", "center" );
diff --git a/tests/unit/form-reset-mixin/core.js b/tests/unit/form-reset-mixin/core.js
index daca4dcf1..aca84ef0c 100644
--- a/tests/unit/form-reset-mixin/core.js
+++ b/tests/unit/form-reset-mixin/core.js
@@ -6,6 +6,7 @@ define( [
 	"ui/widget",
 	"ui/form-reset-mixin"
 ], function( QUnit, $, common, helper ) {
+"use strict";
 
 QUnit.module( "widget factory", {
 	beforeEach: function() {
@@ -31,8 +32,6 @@ QUnit.module( "widget factory", {
 	}
 } );
 
-common.testJshint( "form-reset-mixin" );
-
 QUnit.test( "form reset", function( assert ) {
 	var ready = assert.async();
 	assert.expect( 2 );
diff --git a/tests/unit/menu/core.js b/tests/unit/menu/core.js
index 9e7bd1910..84add3cfb 100644
--- a/tests/unit/menu/core.js
+++ b/tests/unit/menu/core.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/menu"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 QUnit.module( "menu: core", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/menu/events.js b/tests/unit/menu/events.js
index c50c184ec..caac7e741 100644
--- a/tests/unit/menu/events.js
+++ b/tests/unit/menu/events.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/menu"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 var log = testHelper.log,
 	logOutput = testHelper.logOutput,
diff --git a/tests/unit/menu/methods.js b/tests/unit/menu/methods.js
index a5e5a90e3..3c304c264 100644
--- a/tests/unit/menu/methods.js
+++ b/tests/unit/menu/methods.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/menu"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 var log = testHelper.log,
 	logOutput = testHelper.logOutput,
diff --git a/tests/unit/menu/options.js b/tests/unit/menu/options.js
index 525c6f016..edbfec447 100644
--- a/tests/unit/menu/options.js
+++ b/tests/unit/menu/options.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/menu"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 var log = testHelper.log,
 	logOutput = testHelper.logOutput,
diff --git a/tests/unit/position/core.js b/tests/unit/position/core.js
index f5c784242..dac56f5b9 100644
--- a/tests/unit/position/core.js
+++ b/tests/unit/position/core.js
@@ -5,6 +5,7 @@ define( [
 	"lib/helper",
 	"ui/position"
 ], function( QUnit, $, common, helper ) {
+"use strict";
 
 var win = $( window ),
 	scrollTopSupport = function() {
@@ -23,8 +24,6 @@ QUnit.module( "position", {
 	afterEach: helper.moduleAfterEach
 } );
 
-common.testJshint( "position" );
-
 QUnit.test( "my, at, of", function( assert ) {
 	assert.expect( 4 );
 
diff --git a/tests/unit/progressbar/core.js b/tests/unit/progressbar/core.js
index cf9d0aba3..b79ee1f63 100644
--- a/tests/unit/progressbar/core.js
+++ b/tests/unit/progressbar/core.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/progressbar"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "progressbar: core", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/progressbar/events.js b/tests/unit/progressbar/events.js
index e1b33f0b2..3bdcd2bba 100644
--- a/tests/unit/progressbar/events.js
+++ b/tests/unit/progressbar/events.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/progressbar"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "progressbar: events", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/progressbar/methods.js b/tests/unit/progressbar/methods.js
index 8f168f786..4d6f3a039 100644
--- a/tests/unit/progressbar/methods.js
+++ b/tests/unit/progressbar/methods.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/progressbar"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "progressbar: methods", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/progressbar/options.js b/tests/unit/progressbar/options.js
index fa88ae3c2..bb7450db0 100644
--- a/tests/unit/progressbar/options.js
+++ b/tests/unit/progressbar/options.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/progressbar"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "progressbar: options", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/resizable/core.js b/tests/unit/resizable/core.js
index a2fb60006..b3c61514a 100644
--- a/tests/unit/resizable/core.js
+++ b/tests/unit/resizable/core.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/resizable"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 QUnit.module( "resizable: core", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/resizable/events.js b/tests/unit/resizable/events.js
index 3a94d7e52..1822247f5 100644
--- a/tests/unit/resizable/events.js
+++ b/tests/unit/resizable/events.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/resizable"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 QUnit.module( "resizable: events", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/resizable/helper.js b/tests/unit/resizable/helper.js
index 2b8c2b46d..0c9c13959 100644
--- a/tests/unit/resizable/helper.js
+++ b/tests/unit/resizable/helper.js
@@ -3,6 +3,7 @@ define( [
 	"jquery",
 	"lib/helper"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 return $.extend( helper, {
 	drag: function( el, dx, dy ) {
diff --git a/tests/unit/resizable/methods.js b/tests/unit/resizable/methods.js
index 8bdc08c11..c00687b58 100644
--- a/tests/unit/resizable/methods.js
+++ b/tests/unit/resizable/methods.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/resizable"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "resizable: methods", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/resizable/options.js b/tests/unit/resizable/options.js
index ec5a8c010..d85840562 100644
--- a/tests/unit/resizable/options.js
+++ b/tests/unit/resizable/options.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/resizable"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 QUnit.module( "resizable: options", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/selectable/events.js b/tests/unit/selectable/events.js
index 1ef45264e..5f1a512bf 100644
--- a/tests/unit/selectable/events.js
+++ b/tests/unit/selectable/events.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/selectable"
 ], function( QUnit, $, testHelpers ) {
+"use strict";
 
 QUnit.module( "selectable: events", { afterEach: testHelpers.moduleAfterEach }  );
 
diff --git a/tests/unit/selectable/methods.js b/tests/unit/selectable/methods.js
index d0dc23e69..377ac6150 100644
--- a/tests/unit/selectable/methods.js
+++ b/tests/unit/selectable/methods.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/selectable"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "selectable: methods", { afterEach: helper.moduleAfterEach }  );
 
@@ -53,7 +54,9 @@ QUnit.test( "enable", function( assert ) {
 
 	el.selectable( {
 		disabled: true,
-		start: function() { fired = true; }
+		start: function() {
+			fired = true;
+		}
 	} );
 	el.simulate( "drag", {
 		dx: 20,
diff --git a/tests/unit/selectable/options.js b/tests/unit/selectable/options.js
index 02c0d2b2a..6c9e84901 100644
--- a/tests/unit/selectable/options.js
+++ b/tests/unit/selectable/options.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/selectable"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "selectable: options", { afterEach: helper.moduleAfterEach }  );
 
@@ -13,7 +14,9 @@ QUnit.test( "autoRefresh", function( assert ) {
 	var actual = 0,
 		el = $( "#selectable1" ),
 		sel = $( "*", el ),
-		selected = function() { actual += 1; };
+		selected = function() {
+			actual += 1;
+		};
 
 	el = $( "#selectable1" ).selectable( { autoRefresh: false,	selected: selected } );
 	sel.hide();
@@ -51,7 +54,9 @@ QUnit.test( "filter", function( assert ) {
 	var actual = 0,
 		el = $( "#selectable1" ),
 		sel = $( "*", el ),
-		selected = function() { actual += 1; };
+		selected = function() {
+			actual += 1;
+		};
 
 	el = $( "#selectable1" ).selectable( { filter: ".special", selected: selected } );
 	el.simulate( "drag", {
diff --git a/tests/unit/selectmenu/core.js b/tests/unit/selectmenu/core.js
index 0c1c3979a..05a0e6301 100644
--- a/tests/unit/selectmenu/core.js
+++ b/tests/unit/selectmenu/core.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/selectmenu"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "selectmenu: core", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/selectmenu/events.js b/tests/unit/selectmenu/events.js
index 90f40895b..108ac500b 100644
--- a/tests/unit/selectmenu/events.js
+++ b/tests/unit/selectmenu/events.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/selectmenu"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "selectmenu: events", {
 	beforeEach: function() {
diff --git a/tests/unit/selectmenu/methods.js b/tests/unit/selectmenu/methods.js
index 0785d48ad..31c2a2a2b 100644
--- a/tests/unit/selectmenu/methods.js
+++ b/tests/unit/selectmenu/methods.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/selectmenu"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "selectmenu: methods", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/selectmenu/options.js b/tests/unit/selectmenu/options.js
index b41f120db..4a070f4eb 100644
--- a/tests/unit/selectmenu/options.js
+++ b/tests/unit/selectmenu/options.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/selectmenu"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "selectmenu: options", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/slider/core.js b/tests/unit/slider/core.js
index 289ddfdd7..933a68eff 100644
--- a/tests/unit/slider/core.js
+++ b/tests/unit/slider/core.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/slider"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 var element, options;
 
@@ -68,7 +69,7 @@ QUnit.test( "keydown HOME on handle sets value to min", function( assert ) {
 	element.slider( "value", 0 );
 
 	handle().simulate( "keydown", { keyCode: $.ui.keyCode.HOME } );
-	assert.equal( element.slider( "value" ), options.min ) ;
+	assert.equal( element.slider( "value" ), options.min );
 
 	element.slider( "destroy" );
 } );
@@ -87,7 +88,7 @@ QUnit.test( "keydown END on handle sets value to max", function( assert ) {
 	element.slider( "value", 0 );
 
 	handle().simulate( "keydown", { keyCode: $.ui.keyCode.END } );
-	assert.equal( element.slider( "value" ), options.max ) ;
+	assert.equal( element.slider( "value" ), options.max );
 
 	element.slider( "destroy" );
 
diff --git a/tests/unit/slider/events.js b/tests/unit/slider/events.js
index 7250a9ceb..3b283d281 100644
--- a/tests/unit/slider/events.js
+++ b/tests/unit/slider/events.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/slider"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "slider: events", { afterEach: helper.moduleAfterEach }  );
 
@@ -124,16 +125,16 @@ QUnit.test( "mouse based interaction part two: when handles overlap", function(
 			start: function( event, ui ) {
 				assert.equal( handles.index( ui.handle ), 0, "leftmost handle activated when overlapping at maximum" );
 			}
-		} ),
-		handles = element.find( ".ui-slider-handle" );
+		} );
+	handles = element.find( ".ui-slider-handle" );
 	handles.eq( 0 ).simulate( "drag", { dx: -10 } );
 	element.slider( "destroy" );
 
 	element = $( "#slider1" )
 		.slider( {
 			values: [ 19, 20 ]
-		} ),
-		handles = element.find( ".ui-slider-handle" );
+		} );
+	handles = element.find( ".ui-slider-handle" );
 	handles.eq( 0 ).simulate( "drag", { dx: 10 } );
 	element.one( "slidestart", function( event, ui ) {
 		assert.equal( handles.index( ui.handle ), 0, "left handle activated if left was moved last" );
@@ -144,8 +145,8 @@ QUnit.test( "mouse based interaction part two: when handles overlap", function(
 	element = $( "#slider1" )
 		.slider( {
 			values: [ 19, 20 ]
-		} ),
-		handles = element.find( ".ui-slider-handle" );
+		} );
+	handles = element.find( ".ui-slider-handle" );
 	handles.eq( 1 ).simulate( "drag", { dx: -10 } );
 	element.one( "slidestart", function( event, ui ) {
 		assert.equal( handles.index( ui.handle ), 1, "right handle activated if right was moved last (#3467)" );
@@ -158,8 +159,8 @@ QUnit.test( "mouse based interaction part two: when handles overlap", function(
 			min: 0,
 			max: 100,
 			values: [ 0, 50 ]
-		} ),
-		handles = element.find( ".ui-slider-handle" );
+		} );
+	handles = element.find( ".ui-slider-handle" );
 
 	element.slider( "option", { values: [ 100, 100 ] } );
 	handles.eq( 0 ).simulate( "drag", { dx: -10 } );
diff --git a/tests/unit/slider/methods.js b/tests/unit/slider/methods.js
index a2685c60d..b6808c3b2 100644
--- a/tests/unit/slider/methods.js
+++ b/tests/unit/slider/methods.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/slider"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "slider: methods", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/slider/options.js b/tests/unit/slider/options.js
index e8a9b4208..40b6bab22 100644
--- a/tests/unit/slider/options.js
+++ b/tests/unit/slider/options.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/slider"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 var element, options;
 
@@ -147,7 +148,7 @@ QUnit.test( "orientation", function( assert ) {
 	assert.equal( element.find( ".ui-slider-handle" )[ 0 ].style.bottom, "", "CSS bottom reset" );
 	assert.equal( handle()[ 0 ].style.left, percentVal + "%", "horizontal slider handle is positioned with left: %" );
 
-	element.slider( "destroy" ) ;
+	element.slider( "destroy" );
 
 	options = {
 		max: 2,
diff --git a/tests/unit/sortable/core.js b/tests/unit/sortable/core.js
index f6a26bb3b..90ec1bd76 100644
--- a/tests/unit/sortable/core.js
+++ b/tests/unit/sortable/core.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/sortable"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 QUnit.module( "sortable: core", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/sortable/events.js b/tests/unit/sortable/events.js
index 854c1cfa4..0e26603d2 100644
--- a/tests/unit/sortable/events.js
+++ b/tests/unit/sortable/events.js
@@ -6,6 +6,7 @@ define( [
 	"ui/widgets/sortable",
 	"ui/widgets/draggable"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 QUnit.module( "sortable: events", { afterEach: helper.moduleAfterEach }  );
 
@@ -183,7 +184,9 @@ QUnit.test( "#4752: link event firing on sortable with connect list", function(
 	assert.expect( 10 );
 
 	var fired = {},
-		hasFired = function( type ) { return ( type in fired ) && ( true === fired[ type ] ); };
+		hasFired = function( type ) {
+			return ( type in fired ) && ( true === fired[ type ] );
+		};
 
 	$( "#sortable" ).clone().attr( "id", "sortable2" ).insertAfter( "#sortable" );
 
diff --git a/tests/unit/sortable/methods.js b/tests/unit/sortable/methods.js
index e04fd08ae..534dd53b1 100644
--- a/tests/unit/sortable/methods.js
+++ b/tests/unit/sortable/methods.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/sortable"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 QUnit.module( "sortable: methods", { afterEach: helper.moduleAfterEach }  );
 
@@ -62,7 +63,7 @@ QUnit.test( "enable", function( assert ) {
 
 	testHelper.sort( assert, $( "li", el )[ 0 ], 0, 44, 2, ".sortable('option', 'disabled', false)" );
 
-	expected = $( "<div></div>" ).sortable(),
+	expected = $( "<div></div>" ).sortable();
 	actual = expected.sortable( "enable" );
 	assert.equal( actual, expected, "enable is chainable" );
 } );
diff --git a/tests/unit/sortable/options.js b/tests/unit/sortable/options.js
index 49f0744ab..8af1a2682 100644
--- a/tests/unit/sortable/options.js
+++ b/tests/unit/sortable/options.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/sortable"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "sortable: options", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/spinner/core.js b/tests/unit/spinner/core.js
index 6c8c9bdf3..e9f7bc3d2 100644
--- a/tests/unit/spinner/core.js
+++ b/tests/unit/spinner/core.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/spinner"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 var simulateKeyDownUp = testHelper.simulateKeyDownUp;
 
diff --git a/tests/unit/spinner/deprecated.js b/tests/unit/spinner/deprecated.js
index f259ceb2e..79700d116 100644
--- a/tests/unit/spinner/deprecated.js
+++ b/tests/unit/spinner/deprecated.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/spinner"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 var originalSpinner = $.ui.spinner.prototype;
 QUnit.module( "spinner: deprecated", {
diff --git a/tests/unit/spinner/events.js b/tests/unit/spinner/events.js
index 9583a9ec2..833b12adf 100644
--- a/tests/unit/spinner/events.js
+++ b/tests/unit/spinner/events.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/spinner"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 var simulateKeyDownUp = testHelper.simulateKeyDownUp;
 
diff --git a/tests/unit/spinner/methods.js b/tests/unit/spinner/methods.js
index 8af1a6b6e..3ba8b69d1 100644
--- a/tests/unit/spinner/methods.js
+++ b/tests/unit/spinner/methods.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/spinner"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 var simulateKeyDownUp = testHelper.simulateKeyDownUp;
 
diff --git a/tests/unit/spinner/options.js b/tests/unit/spinner/options.js
index 7d802b2a4..51d8589fd 100644
--- a/tests/unit/spinner/options.js
+++ b/tests/unit/spinner/options.js
@@ -6,6 +6,7 @@ define( [
 	"globalize",
 	"globalize/ja-JP"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "spinner: options", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/subsuite.js b/tests/unit/subsuite.js
index 77dc4a943..8d594588c 100644
--- a/tests/unit/subsuite.js
+++ b/tests/unit/subsuite.js
@@ -1,4 +1,5 @@
 ( function() {
+"use strict";
 
 var versions = [
 		"1.8.0", "1.8.1", "1.8.2", "1.8.3",
@@ -33,4 +34,4 @@ window.testAllVersions = function( widget ) {
 		} ) );
 };
 
-}() );
+} )();
diff --git a/tests/unit/tabs/core.js b/tests/unit/tabs/core.js
index 43392bdb4..8d4322463 100644
--- a/tests/unit/tabs/core.js
+++ b/tests/unit/tabs/core.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/tabs"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 var state = testHelper.state;
 
diff --git a/tests/unit/tabs/events.js b/tests/unit/tabs/events.js
index 9f7e92d8f..70510d7d6 100644
--- a/tests/unit/tabs/events.js
+++ b/tests/unit/tabs/events.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/tabs"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 var state = testHelper.state;
 
diff --git a/tests/unit/tabs/methods.js b/tests/unit/tabs/methods.js
index c67d76a31..e447d7623 100644
--- a/tests/unit/tabs/methods.js
+++ b/tests/unit/tabs/methods.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/tabs"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 var disabled = testHelper.disabled,
 	state = testHelper.state;
diff --git a/tests/unit/tabs/options.js b/tests/unit/tabs/options.js
index 8414f7976..774a24d17 100644
--- a/tests/unit/tabs/options.js
+++ b/tests/unit/tabs/options.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/tabs"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 var disabled = testHelper.disabled,
 	equalHeight = testHelper.equalHeight,
diff --git a/tests/unit/tooltip/core.js b/tests/unit/tooltip/core.js
index c50164efa..5ce49aeb7 100644
--- a/tests/unit/tooltip/core.js
+++ b/tests/unit/tooltip/core.js
@@ -4,6 +4,7 @@ define( [
 	"./helper",
 	"ui/widgets/tooltip"
 ], function( QUnit, $, testHelper ) {
+"use strict";
 
 var beforeAfterEach = testHelper.beforeAfterEach;
 
diff --git a/tests/unit/tooltip/deprecated.js b/tests/unit/tooltip/deprecated.js
index b44b8dcd6..4d3975e84 100644
--- a/tests/unit/tooltip/deprecated.js
+++ b/tests/unit/tooltip/deprecated.js
@@ -4,6 +4,7 @@ define( [
 	"./helper",
 	"ui/widgets/tooltip"
 ], function( QUnit, $, testHelper ) {
+"use strict";
 
 var beforeAfterEach = testHelper.beforeAfterEach;
 
diff --git a/tests/unit/tooltip/events.js b/tests/unit/tooltip/events.js
index 1e83c5255..16d1e08cb 100644
--- a/tests/unit/tooltip/events.js
+++ b/tests/unit/tooltip/events.js
@@ -4,6 +4,7 @@ define( [
 	"./helper",
 	"ui/widgets/tooltip"
 ], function( QUnit, $, testHelper ) {
+"use strict";
 
 var beforeAfterEach = testHelper.beforeAfterEach;
 
diff --git a/tests/unit/tooltip/helper.js b/tests/unit/tooltip/helper.js
index 01d4c03ac..8bc999157 100644
--- a/tests/unit/tooltip/helper.js
+++ b/tests/unit/tooltip/helper.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/tooltip"
 ], function( QUnit, $, helper ) {
+	"use strict";
 
 	return $.extend( helper, {
 		beforeAfterEach: function() {
@@ -13,10 +14,8 @@ define( [
 						timers = jQuery.timers;
 
 					jQuery.fx.stop();
-					var x = false;
 
 					for ( index = timers.length; index--; ) {
-						x = true;
 						timer = timers[ index ];
 						timer.anim.stop();
 						timers.splice( index, 1 );
diff --git a/tests/unit/tooltip/methods.js b/tests/unit/tooltip/methods.js
index d71c5e0a6..b7a512ad1 100644
--- a/tests/unit/tooltip/methods.js
+++ b/tests/unit/tooltip/methods.js
@@ -4,6 +4,7 @@ define( [
 	"./helper",
 	"ui/widgets/tooltip"
 ], function( QUnit, $, testHelper ) {
+"use strict";
 
 var beforeAfterEach = testHelper.beforeAfterEach;
 
diff --git a/tests/unit/tooltip/options.js b/tests/unit/tooltip/options.js
index b9c056388..72a3cf889 100644
--- a/tests/unit/tooltip/options.js
+++ b/tests/unit/tooltip/options.js
@@ -4,6 +4,7 @@ define( [
 	"./helper",
 	"ui/widgets/tooltip"
 ], function( QUnit, $, testHelper ) {
+"use strict";
 
 var beforeAfterEach = testHelper.beforeAfterEach;
 
@@ -103,7 +104,7 @@ QUnit.test( "content: async callback loses focus before load", function( assert
 } );
 
 QUnit.test( "content: change while open", function( assert ) {
-	assert.expect( 2 ) ;
+	assert.expect( 2 );
 	var element = $( "#tooltipped1" ).tooltip( {
 		content: function() {
 			return "old";
diff --git a/tests/unit/widget/animation.js b/tests/unit/widget/animation.js
index dcacec75c..11d141369 100644
--- a/tests/unit/widget/animation.js
+++ b/tests/unit/widget/animation.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widget"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "widget animation", ( function() {
 	var show = $.fn.show,
@@ -30,7 +31,7 @@ QUnit.module( "widget animation", ( function() {
 			return helper.moduleAfterEach.apply( this, arguments );
 		}
 	};
-}() ) );
+} )()  );
 
 QUnit.test( "show: null", function( assert ) {
 	var ready = assert.async();
diff --git a/tests/unit/widget/classes.js b/tests/unit/widget/classes.js
index 357283b5e..609f99032 100644
--- a/tests/unit/widget/classes.js
+++ b/tests/unit/widget/classes.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widget"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 QUnit.module( "widget factory classes", {
 	beforeEach: function() {
diff --git a/tests/unit/widget/core.js b/tests/unit/widget/core.js
index 9e69a9253..e36459f72 100644
--- a/tests/unit/widget/core.js
+++ b/tests/unit/widget/core.js
@@ -5,6 +5,7 @@ define( [
 	"lib/helper",
 	"ui/widget"
 ], function( QUnit, $, common, helper ) {
+"use strict";
 
 QUnit.module( "widget factory", {
 	afterEach: function() {
@@ -16,8 +17,6 @@ QUnit.module( "widget factory", {
 	}
 } );
 
-common.testJshint( "widget" );
-
 QUnit.test( "widget creation", function( assert ) {
 	assert.expect( 5 );
 	var method,
@@ -1443,7 +1442,7 @@ QUnit.test( "._trigger() - instance as element", function( assert ) {
 				.trigger( "remove" );
 		} );
 	} );
-}() );
+} )();
 
 QUnit.test( "redefine", function( assert ) {
 	assert.expect( 4 );
diff --git a/tests/unit/widget/extend.js b/tests/unit/widget/extend.js
index b27d925f0..ea2707ef3 100644
--- a/tests/unit/widget/extend.js
+++ b/tests/unit/widget/extend.js
@@ -3,6 +3,7 @@ define( [
 	"jquery",
 	"ui/widget"
 ], function( QUnit, $ ) {
+"use strict";
 
 QUnit.test( "$.widget.extend()", function( assert ) {
 	assert.expect( 28 );
@@ -75,7 +76,7 @@ QUnit.test( "$.widget.extend()", function( assert ) {
 	assert.strictEqual( nullUndef.xnumber0, null, "Check to make sure null values are inserted" );
 
 	target = {};
-	recursive = { foo:target, bar:5 };
+	recursive = { foo: target, bar: 5 };
 	$.widget.extend( target, recursive );
 	assert.deepEqual( target, { foo: {}, bar: 5 }, "Check to make sure a recursive obj doesn't go never-ending loop by not copying it over" );
 
@@ -92,7 +93,7 @@ QUnit.test( "$.widget.extend()", function( assert ) {
 	assert.strictEqual( ret.foo, null, "Make sure a null value doesn't crash with deep extend, for #1908" );
 
 	obj = { foo: null };
-	$.widget.extend( obj, { foo:"notnull" } );
+	$.widget.extend( obj, { foo: "notnull" } );
 	assert.equal( obj.foo, "notnull", "Make sure a null value can be overwritten" );
 
 	settings = $.widget.extend( {}, defaults, options1, options2 );