diff --git a/test/fixtures/jquery-ui-1.12/base/theme.css b/test/fixtures/jquery-ui-1.12.1/base/theme.css
similarity index 76%
rename from test/fixtures/jquery-ui-1.12/base/theme.css
rename to test/fixtures/jquery-ui-1.12.1/base/theme.css
index c7ad484..7993707 100644
--- a/test/fixtures/jquery-ui-1.12/base/theme.css
+++ b/test/fixtures/jquery-ui-1.12.1/base/theme.css
@@ -1,5 +1,5 @@
 /*!
- * jQuery UI CSS Framework @VERSION
+ * jQuery UI CSS Framework 1.12.1
  * http://jqueryui.com
  *
  * Copyright jQuery Foundation and other contributors
@@ -15,7 +15,7 @@
 /* Component containers
 ----------------------------------*/
 .ui-widget {
-	font-family: Verdana,Arial,sans-serif/*{ffDefault}*/;
+	font-family: Arial,Helvetica,sans-serif/*{ffDefault}*/;
 	font-size: 1em/*{fsDefault}*/;
 }
 .ui-widget .ui-widget {
@@ -25,41 +25,54 @@
 .ui-widget select,
 .ui-widget textarea,
 .ui-widget button {
-	font-family: Verdana,Arial,sans-serif/*{ffDefault}*/;
+	font-family: Arial,Helvetica,sans-serif/*{ffDefault}*/;
 	font-size: 1em;
 }
+.ui-widget.ui-widget-content {
+	border: 1px solid #c5c5c5/*{borderColorDefault}*/;
+}
 .ui-widget-content {
-	border: 1px solid #aaaaaa/*{borderColorContent}*/;
-	background: #ffffff/*{bgColorContent}*/ url("images/ui-bg_flat_75_ffffff_40x100.png")/*{bgImgUrlContent}*/ 50%/*{bgContentXPos}*/ 50%/*{bgContentYPos}*/ repeat-x/*{bgContentRepeat}*/;
-	color: #222222/*{fcContent}*/;
+	border: 1px solid #dddddd/*{borderColorContent}*/;
+	background: #ffffff/*{bgColorContent}*/ /*{bgImgUrlContent}*/ /*{bgContentXPos}*/ /*{bgContentYPos}*/ /*{bgContentRepeat}*/;
+	color: #333333/*{fcContent}*/;
 }
 .ui-widget-content a {
-	color: #222222/*{fcContent}*/;
+	color: #333333/*{fcContent}*/;
 }
 .ui-widget-header {
-	border: 1px solid #aaaaaa/*{borderColorHeader}*/;
-	background: #cccccc/*{bgColorHeader}*/ url("images/ui-bg_highlight-soft_75_cccccc_1x100.png")/*{bgImgUrlHeader}*/ 50%/*{bgHeaderXPos}*/ 50%/*{bgHeaderYPos}*/ repeat-x/*{bgHeaderRepeat}*/;
-	color: #222222/*{fcHeader}*/;
+	border: 1px solid #dddddd/*{borderColorHeader}*/;
+	background: #e9e9e9/*{bgColorHeader}*/ /*{bgImgUrlHeader}*/ /*{bgHeaderXPos}*/ /*{bgHeaderYPos}*/ /*{bgHeaderRepeat}*/;
+	color: #333333/*{fcHeader}*/;
 	font-weight: bold;
 }
 .ui-widget-header a {
-	color: #222222/*{fcHeader}*/;
+	color: #333333/*{fcHeader}*/;
 }
 
 /* Interaction states
 ----------------------------------*/
 .ui-state-default,
 .ui-widget-content .ui-state-default,
-.ui-widget-header .ui-state-default {
-	border: 1px solid #d3d3d3/*{borderColorDefault}*/;
-	background: #e6e6e6/*{bgColorDefault}*/ url("images/ui-bg_glass_75_e6e6e6_1x400.png")/*{bgImgUrlDefault}*/ 50%/*{bgDefaultXPos}*/ 50%/*{bgDefaultYPos}*/ repeat-x/*{bgDefaultRepeat}*/;
+.ui-widget-header .ui-state-default,
+.ui-button,
+
+/* We use html here because we need a greater specificity to make sure disabled
+works properly when clicked or hovered */
+html .ui-button.ui-state-disabled:hover,
+html .ui-button.ui-state-disabled:active {
+	border: 1px solid #c5c5c5/*{borderColorDefault}*/;
+	background: #f6f6f6/*{bgColorDefault}*/ /*{bgImgUrlDefault}*/ /*{bgDefaultXPos}*/ /*{bgDefaultYPos}*/ /*{bgDefaultRepeat}*/;
 	font-weight: normal/*{fwDefault}*/;
-	color: #555555/*{fcDefault}*/;
+	color: #454545/*{fcDefault}*/;
 }
 .ui-state-default a,
 .ui-state-default a:link,
-.ui-state-default a:visited {
-	color: #555555/*{fcDefault}*/;
+.ui-state-default a:visited,
+a.ui-button,
+a:link.ui-button,
+a:visited.ui-button,
+.ui-button {
+	color: #454545/*{fcDefault}*/;
 	text-decoration: none;
 }
 .ui-state-hover,
@@ -67,11 +80,13 @@
 .ui-widget-header .ui-state-hover,
 .ui-state-focus,
 .ui-widget-content .ui-state-focus,
-.ui-widget-header .ui-state-focus {
-	border: 1px solid #999999/*{borderColorHover}*/;
-	background: #dadada/*{bgColorHover}*/ url("images/ui-bg_glass_75_dadada_1x400.png")/*{bgImgUrlHover}*/ 50%/*{bgHoverXPos}*/ 50%/*{bgHoverYPos}*/ repeat-x/*{bgHoverRepeat}*/;
+.ui-widget-header .ui-state-focus,
+.ui-button:hover,
+.ui-button:focus {
+	border: 1px solid #cccccc/*{borderColorHover}*/;
+	background: #ededed/*{bgColorHover}*/ /*{bgImgUrlHover}*/ /*{bgHoverXPos}*/ /*{bgHoverYPos}*/ /*{bgHoverRepeat}*/;
 	font-weight: normal/*{fwDefault}*/;
-	color: #212121/*{fcHover}*/;
+	color: #2b2b2b/*{fcHover}*/;
 }
 .ui-state-hover a,
 .ui-state-hover a:hover,
@@ -80,22 +95,36 @@
 .ui-state-focus a,
 .ui-state-focus a:hover,
 .ui-state-focus a:link,
-.ui-state-focus a:visited {
-	color: #212121/*{fcHover}*/;
+.ui-state-focus a:visited,
+a.ui-button:hover,
+a.ui-button:focus {
+	color: #2b2b2b/*{fcHover}*/;
 	text-decoration: none;
 }
+
+.ui-visual-focus {
+	box-shadow: 0 0 3px 1px rgb(94, 158, 214);
+}
 .ui-state-active,
 .ui-widget-content .ui-state-active,
-.ui-widget-header .ui-state-active {
-	border: 1px solid #aaaaaa/*{borderColorActive}*/;
-	background: #ffffff/*{bgColorActive}*/ url("images/ui-bg_glass_65_ffffff_1x400.png")/*{bgImgUrlActive}*/ 50%/*{bgActiveXPos}*/ 50%/*{bgActiveYPos}*/ repeat-x/*{bgActiveRepeat}*/;
+.ui-widget-header .ui-state-active,
+a.ui-button:active,
+.ui-button:active,
+.ui-button.ui-state-active:hover {
+	border: 1px solid #003eff/*{borderColorActive}*/;
+	background: #007fff/*{bgColorActive}*/ /*{bgImgUrlActive}*/ /*{bgActiveXPos}*/ /*{bgActiveYPos}*/ /*{bgActiveRepeat}*/;
 	font-weight: normal/*{fwDefault}*/;
-	color: #212121/*{fcActive}*/;
+	color: #ffffff/*{fcActive}*/;
+}
+.ui-icon-background,
+.ui-state-active .ui-icon-background {
+	border: #003eff/*{borderColorActive}*/;
+	background-color: #ffffff/*{fcActive}*/;
 }
 .ui-state-active a,
 .ui-state-active a:link,
 .ui-state-active a:visited {
-	color: #212121/*{fcActive}*/;
+	color: #ffffff/*{fcActive}*/;
 	text-decoration: none;
 }
 
@@ -104,31 +133,35 @@
 .ui-state-highlight,
 .ui-widget-content .ui-state-highlight,
 .ui-widget-header .ui-state-highlight {
-	border: 1px solid #fcefa1/*{borderColorHighlight}*/;
-	background: #fbf9ee/*{bgColorHighlight}*/ url("images/ui-bg_glass_55_fbf9ee_1x400.png")/*{bgImgUrlHighlight}*/ 50%/*{bgHighlightXPos}*/ 50%/*{bgHighlightYPos}*/ repeat-x/*{bgHighlightRepeat}*/;
-	color: #363636/*{fcHighlight}*/;
+	border: 1px solid #dad55e/*{borderColorHighlight}*/;
+	background: #fffa90/*{bgColorHighlight}*/ /*{bgImgUrlHighlight}*/ /*{bgHighlightXPos}*/ /*{bgHighlightYPos}*/ /*{bgHighlightRepeat}*/;
+	color: #777620/*{fcHighlight}*/;
+}
+.ui-state-checked {
+	border: 1px solid #dad55e/*{borderColorHighlight}*/;
+	background: #fffa90/*{bgColorHighlight}*/;
 }
 .ui-state-highlight a,
 .ui-widget-content .ui-state-highlight a,
 .ui-widget-header .ui-state-highlight a {
-	color: #363636/*{fcHighlight}*/;
+	color: #777620/*{fcHighlight}*/;
 }
 .ui-state-error,
 .ui-widget-content .ui-state-error,
 .ui-widget-header .ui-state-error {
-	border: 1px solid #cd0a0a/*{borderColorError}*/;
-	background: #fef1ec/*{bgColorError}*/ url("images/ui-bg_glass_95_fef1ec_1x400.png")/*{bgImgUrlError}*/ 50%/*{bgErrorXPos}*/ 50%/*{bgErrorYPos}*/ repeat-x/*{bgErrorRepeat}*/;
-	color: #cd0a0a/*{fcError}*/;
+	border: 1px solid #f1a899/*{borderColorError}*/;
+	background: #fddfdf/*{bgColorError}*/ /*{bgImgUrlError}*/ /*{bgErrorXPos}*/ /*{bgErrorYPos}*/ /*{bgErrorRepeat}*/;
+	color: #5f3f3f/*{fcError}*/;
 }
 .ui-state-error a,
 .ui-widget-content .ui-state-error a,
 .ui-widget-header .ui-state-error a {
-	color: #cd0a0a/*{fcError}*/;
+	color: #5f3f3f/*{fcError}*/;
 }
 .ui-state-error-text,
 .ui-widget-content .ui-state-error-text,
 .ui-widget-header .ui-state-error-text {
-	color: #cd0a0a/*{fcError}*/;
+	color: #5f3f3f/*{fcError}*/;
 }
 .ui-priority-primary,
 .ui-widget-content .ui-priority-primary,
@@ -163,27 +196,31 @@
 }
 .ui-icon,
 .ui-widget-content .ui-icon {
-	background-image: url("images/ui-icons_222222_256x240.png")/*{iconsContent}*/;
+	background-image: url("images/ui-icons_444444_256x240.png")/*{iconsContent}*/;
 }
 .ui-widget-header .ui-icon {
-	background-image: url("images/ui-icons_222222_256x240.png")/*{iconsHeader}*/;
-}
-.ui-state-default .ui-icon {
-	background-image: url("images/ui-icons_888888_256x240.png")/*{iconsDefault}*/;
+	background-image: url("images/ui-icons_444444_256x240.png")/*{iconsHeader}*/;
 }
 .ui-state-hover .ui-icon,
-.ui-state-focus .ui-icon {
-	background-image: url("images/ui-icons_454545_256x240.png")/*{iconsHover}*/;
+.ui-state-focus .ui-icon,
+.ui-button:hover .ui-icon,
+.ui-button:focus .ui-icon {
+	background-image: url("images/ui-icons_555555_256x240.png")/*{iconsHover}*/;
 }
-.ui-state-active .ui-icon {
-	background-image: url("images/ui-icons_454545_256x240.png")/*{iconsActive}*/;
+.ui-state-active .ui-icon,
+.ui-button:active .ui-icon {
+	background-image: url("images/ui-icons_ffffff_256x240.png")/*{iconsActive}*/;
 }
-.ui-state-highlight .ui-icon {
-	background-image: url("images/ui-icons_2e83ff_256x240.png")/*{iconsHighlight}*/;
+.ui-state-highlight .ui-icon,
+.ui-button .ui-state-highlight.ui-icon {
+	background-image: url("images/ui-icons_777620_256x240.png")/*{iconsHighlight}*/;
 }
 .ui-state-error .ui-icon,
 .ui-state-error-text .ui-icon {
-	background-image: url("images/ui-icons_cd0a0a_256x240.png")/*{iconsError}*/;
+	background-image: url("images/ui-icons_cc0000_256x240.png")/*{iconsError}*/;
+}
+.ui-button .ui-icon {
+	background-image: url("images/ui-icons_777777_256x240.png")/*{iconsDefault}*/;
 }
 
 /* positioning */
@@ -192,7 +229,7 @@
 .ui-icon-caret-1-ne { background-position: -16px 0; }
 .ui-icon-caret-1-e { background-position: -32px 0; }
 .ui-icon-caret-1-se { background-position: -48px 0; }
-.ui-icon-caret-1-s { background-position: -64px 0; }
+.ui-icon-caret-1-s { background-position: -65px 0; }
 .ui-icon-caret-1-sw { background-position: -80px 0; }
 .ui-icon-caret-1-w { background-position: -96px 0; }
 .ui-icon-caret-1-nw { background-position: -112px 0; }
@@ -202,7 +239,7 @@
 .ui-icon-triangle-1-ne { background-position: -16px -16px; }
 .ui-icon-triangle-1-e { background-position: -32px -16px; }
 .ui-icon-triangle-1-se { background-position: -48px -16px; }
-.ui-icon-triangle-1-s { background-position: -64px -16px; }
+.ui-icon-triangle-1-s { background-position: -65px -16px; }
 .ui-icon-triangle-1-sw { background-position: -80px -16px; }
 .ui-icon-triangle-1-w { background-position: -96px -16px; }
 .ui-icon-triangle-1-nw { background-position: -112px -16px; }
@@ -212,7 +249,7 @@
 .ui-icon-arrow-1-ne { background-position: -16px -32px; }
 .ui-icon-arrow-1-e { background-position: -32px -32px; }
 .ui-icon-arrow-1-se { background-position: -48px -32px; }
-.ui-icon-arrow-1-s { background-position: -64px -32px; }
+.ui-icon-arrow-1-s { background-position: -65px -32px; }
 .ui-icon-arrow-1-sw { background-position: -80px -32px; }
 .ui-icon-arrow-1-w { background-position: -96px -32px; }
 .ui-icon-arrow-1-nw { background-position: -112px -32px; }
@@ -224,7 +261,7 @@
 .ui-icon-arrowstop-1-e { background-position: -208px -32px; }
 .ui-icon-arrowstop-1-s { background-position: -224px -32px; }
 .ui-icon-arrowstop-1-w { background-position: -240px -32px; }
-.ui-icon-arrowthick-1-n { background-position: 0 -48px; }
+.ui-icon-arrowthick-1-n { background-position: 1px -48px; }
 .ui-icon-arrowthick-1-ne { background-position: -16px -48px; }
 .ui-icon-arrowthick-1-e { background-position: -32px -48px; }
 .ui-icon-arrowthick-1-se { background-position: -48px -48px; }
@@ -373,38 +410,34 @@
 .ui-corner-top,
 .ui-corner-left,
 .ui-corner-tl {
-	border-top-left-radius: 4px/*{cornerRadius}*/;
+	border-top-left-radius: 3px/*{cornerRadius}*/;
 }
 .ui-corner-all,
 .ui-corner-top,
 .ui-corner-right,
 .ui-corner-tr {
-	border-top-right-radius: 4px/*{cornerRadius}*/;
+	border-top-right-radius: 3px/*{cornerRadius}*/;
 }
 .ui-corner-all,
 .ui-corner-bottom,
 .ui-corner-left,
 .ui-corner-bl {
-	border-bottom-left-radius: 4px/*{cornerRadius}*/;
+	border-bottom-left-radius: 3px/*{cornerRadius}*/;
 }
 .ui-corner-all,
 .ui-corner-bottom,
 .ui-corner-right,
 .ui-corner-br {
-	border-bottom-right-radius: 4px/*{cornerRadius}*/;
+	border-bottom-right-radius: 3px/*{cornerRadius}*/;
 }
 
 /* Overlays */
 .ui-widget-overlay {
-	background: #aaaaaa/*{bgColorOverlay}*/ url("images/ui-bg_flat_0_aaaaaa_40x100.png")/*{bgImgUrlOverlay}*/ 50%/*{bgOverlayXPos}*/ 50%/*{bgOverlayYPos}*/ repeat-x/*{bgOverlayRepeat}*/;
+	background: #aaaaaa/*{bgColorOverlay}*/ /*{bgImgUrlOverlay}*/ /*{bgOverlayXPos}*/ /*{bgOverlayYPos}*/ /*{bgOverlayRepeat}*/;
 	opacity: .3/*{opacityOverlay}*/;
 	filter: Alpha(Opacity=30)/*{opacityFilterOverlay}*/; /* support: IE8 */
 }
 .ui-widget-shadow {
-	margin: -8px/*{offsetTopShadow}*/ 0 0 -8px/*{offsetLeftShadow}*/;
-	padding: 8px/*{thicknessShadow}*/;
-	background: #aaaaaa/*{bgColorShadow}*/ url("images/ui-bg_flat_0_aaaaaa_40x100.png")/*{bgImgUrlShadow}*/ 50%/*{bgShadowXPos}*/ 50%/*{bgShadowYPos}*/ repeat-x/*{bgShadowRepeat}*/;
-	opacity: .3/*{opacityShadow}*/;
-	filter: Alpha(Opacity=30)/*{opacityFilterShadow}*/; /* support: IE8 */
-	border-radius: 8px/*{cornerRadiusShadow}*/;
+	-webkit-box-shadow: 0/*{offsetLeftShadow}*/ 0/*{offsetTopShadow}*/ 5px/*{thicknessShadow}*/ #666666/*{bgColorShadow}*/;
+	box-shadow: 0/*{offsetLeftShadow}*/ 0/*{offsetTopShadow}*/ 5px/*{thicknessShadow}*/ #666666/*{bgColorShadow}*/;
 }
diff --git a/test/fixtures/jquery-ui-1.12/themes/base.css b/test/fixtures/jquery-ui-1.12.1/themes/smoothness.css
similarity index 75%
rename from test/fixtures/jquery-ui-1.12/themes/base.css
rename to test/fixtures/jquery-ui-1.12.1/themes/smoothness.css
index e041db2..b2d606e 100644
--- a/test/fixtures/jquery-ui-1.12/themes/base.css
+++ b/test/fixtures/jquery-ui-1.12.1/themes/smoothness.css
@@ -1,5 +1,5 @@
 /*!
- * jQuery UI CSS Framework @VERSION
+ * jQuery UI CSS Framework 1.12.1
  * http://jqueryui.com
  *
  * Copyright jQuery Foundation and other contributors
@@ -8,15 +8,15 @@
  *
  * http://api.jqueryui.com/category/theming/
  *
- * To view and modify this theme, visit http://jqueryui.com/themeroller/?cornerRadiusShadow=8px&offsetLeftShadow=0px&offsetTopShadow=0px&thicknessShadow=5px&opacityShadow=30&bgImgOpacityShadow=0&bgTextureShadow=flat&bgColorShadow=666666&opacityOverlay=30&bgImgOpacityOverlay=0&bgTextureOverlay=flat&bgColorOverlay=aaaaaa&iconColorError=cc0000&fcError=5f3f3f&borderColorError=f1a899&bgTextureError=flat&bgColorError=fddfdf&iconColorHighlight=777620&fcHighlight=777620&borderColorHighlight=dad55e&bgTextureHighlight=flat&bgColorHighlight=fffa90&iconColorActive=ffffff&fcActive=ffffff&borderColorActive=003eff&bgTextureActive=flat&bgColorActive=007fff&iconColorHover=555555&fcHover=2b2b2b&borderColorHover=cccccc&bgTextureHover=flat&bgColorHover=ededed&iconColorDefault=777777&fcDefault=454545&borderColorDefault=c5c5c5&bgTextureDefault=flat&bgColorDefault=f6f6f6&iconColorContent=444444&fcContent=333333&borderColorContent=dddddd&bgTextureContent=flat&bgColorContent=ffffff&iconColorHeader=444444&fcHeader=333333&borderColorHeader=dddddd&bgTextureHeader=flat&bgColorHeader=e9e9e9&cornerRadius=3px&fwDefault=normal&fsDefault=1em&ffDefault=Arial%2CHelvetica%2Csans-serif
+ * To view and modify this theme, visit http://jqueryui.com/themeroller/?cornerRadiusShadow=8px&offsetLeftShadow=-8px&offsetTopShadow=-8px&thicknessShadow=8px&opacityShadow=30&bgImgOpacityShadow=0&bgTextureShadow=flat&bgColorShadow=aaaaaa&opacityOverlay=30&bgImgOpacityOverlay=0&bgTextureOverlay=flat&bgColorOverlay=aaaaaa&iconColorError=cd0a0a&fcError=cd0a0a&borderColorError=cd0a0a&bgImgOpacityError=95&bgTextureError=glass&bgColorError=fef1ec&iconColorHighlight=2e83ff&fcHighlight=363636&borderColorHighlight=fcefa1&bgImgOpacityHighlight=55&bgTextureHighlight=glass&bgColorHighlight=fbf9ee&iconColorActive=454545&fcActive=212121&borderColorActive=aaaaaa&bgImgOpacityActive=65&bgTextureActive=glass&bgColorActive=ffffff&iconColorHover=454545&fcHover=212121&borderColorHover=999999&bgImgOpacityHover=75&bgTextureHover=glass&bgColorHover=dadada&iconColorDefault=888888&fcDefault=555555&borderColorDefault=d3d3d3&bgImgOpacityDefault=75&bgTextureDefault=glass&bgColorDefault=e6e6e6&iconColorContent=222222&fcContent=222222&borderColorContent=aaaaaa&bgImgOpacityContent=75&bgTextureContent=flat&bgColorContent=ffffff&iconColorHeader=222222&fcHeader=222222&borderColorHeader=aaaaaa&bgImgOpacityHeader=75&bgTextureHeader=highlight_soft&bgColorHeader=cccccc&cornerRadius=4px&fsDefault=1.1em&fwDefault=normal&ffDefault=Verdana%2CArial%2Csans-serif
  */
 
 
 /* Component containers
 ----------------------------------*/
 .ui-widget {
-	font-family: Arial,Helvetica,sans-serif;
-	font-size: 1em;
+	font-family: Verdana,Arial,sans-serif;
+	font-size: 1.1em;
 }
 .ui-widget .ui-widget {
 	font-size: 1em;
@@ -25,41 +25,54 @@
 .ui-widget select,
 .ui-widget textarea,
 .ui-widget button {
-	font-family: Arial,Helvetica,sans-serif;
+	font-family: Verdana,Arial,sans-serif;
 	font-size: 1em;
 }
+.ui-widget.ui-widget-content {
+	border: 1px solid #d3d3d3;
+}
 .ui-widget-content {
-	border: 1px solid #dddddd;
+	border: 1px solid #aaaaaa;
 	background: #ffffff;
-	color: #333333;
+	color: #222222;
 }
 .ui-widget-content a {
-	color: #333333;
+	color: #222222;
 }
 .ui-widget-header {
-	border: 1px solid #dddddd;
-	background: #e9e9e9;
-	color: #333333;
+	border: 1px solid #aaaaaa;
+	background: #cccccc url("images/ui-bg_highlight-soft_75_cccccc_1x100.png") 50% 50% repeat-x;
+	color: #222222;
 	font-weight: bold;
 }
 .ui-widget-header a {
-	color: #333333;
+	color: #222222;
 }
 
 /* Interaction states
 ----------------------------------*/
 .ui-state-default,
 .ui-widget-content .ui-state-default,
-.ui-widget-header .ui-state-default {
-	border: 1px solid #c5c5c5;
-	background: #f6f6f6;
+.ui-widget-header .ui-state-default,
+.ui-button,
+
+/* We use html here because we need a greater specificity to make sure disabled
+works properly when clicked or hovered */
+html .ui-button.ui-state-disabled:hover,
+html .ui-button.ui-state-disabled:active {
+	border: 1px solid #d3d3d3;
+	background: #e6e6e6 url("images/ui-bg_glass_75_e6e6e6_1x400.png") 50% 50% repeat-x;
 	font-weight: normal;
-	color: #454545;
+	color: #555555;
 }
 .ui-state-default a,
 .ui-state-default a:link,
-.ui-state-default a:visited {
-	color: #454545;
+.ui-state-default a:visited,
+a.ui-button,
+a:link.ui-button,
+a:visited.ui-button,
+.ui-button {
+	color: #555555;
 	text-decoration: none;
 }
 .ui-state-hover,
@@ -67,11 +80,13 @@
 .ui-widget-header .ui-state-hover,
 .ui-state-focus,
 .ui-widget-content .ui-state-focus,
-.ui-widget-header .ui-state-focus {
-	border: 1px solid #cccccc;
-	background: #ededed;
+.ui-widget-header .ui-state-focus,
+.ui-button:hover,
+.ui-button:focus {
+	border: 1px solid #999999;
+	background: #dadada url("images/ui-bg_glass_75_dadada_1x400.png") 50% 50% repeat-x;
 	font-weight: normal;
-	color: #2b2b2b;
+	color: #212121;
 }
 .ui-state-hover a,
 .ui-state-hover a:hover,
@@ -80,22 +95,36 @@
 .ui-state-focus a,
 .ui-state-focus a:hover,
 .ui-state-focus a:link,
-.ui-state-focus a:visited {
-	color: #2b2b2b;
+.ui-state-focus a:visited,
+a.ui-button:hover,
+a.ui-button:focus {
+	color: #212121;
 	text-decoration: none;
 }
+
+.ui-visual-focus {
+	box-shadow: 0 0 3px 1px rgb(94, 158, 214);
+}
 .ui-state-active,
 .ui-widget-content .ui-state-active,
-.ui-widget-header .ui-state-active {
-	border: 1px solid #003eff;
-	background: #007fff;
+.ui-widget-header .ui-state-active,
+a.ui-button:active,
+.ui-button:active,
+.ui-button.ui-state-active:hover {
+	border: 1px solid #aaaaaa;
+	background: #ffffff url("images/ui-bg_glass_65_ffffff_1x400.png") 50% 50% repeat-x;
 	font-weight: normal;
-	color: #ffffff;
+	color: #212121;
+}
+.ui-icon-background,
+.ui-state-active .ui-icon-background {
+	border: #aaaaaa;
+	background-color: #212121;
 }
 .ui-state-active a,
 .ui-state-active a:link,
 .ui-state-active a:visited {
-	color: #ffffff;
+	color: #212121;
 	text-decoration: none;
 }
 
@@ -104,31 +133,35 @@
 .ui-state-highlight,
 .ui-widget-content .ui-state-highlight,
 .ui-widget-header .ui-state-highlight {
-	border: 1px solid #dad55e;
-	background: #fffa90;
-	color: #777620;
+	border: 1px solid #fcefa1;
+	background: #fbf9ee url("images/ui-bg_glass_55_fbf9ee_1x400.png") 50% 50% repeat-x;
+	color: #363636;
+}
+.ui-state-checked {
+	border: 1px solid #fcefa1;
+	background: #fbf9ee;
 }
 .ui-state-highlight a,
 .ui-widget-content .ui-state-highlight a,
 .ui-widget-header .ui-state-highlight a {
-	color: #777620;
+	color: #363636;
 }
 .ui-state-error,
 .ui-widget-content .ui-state-error,
 .ui-widget-header .ui-state-error {
-	border: 1px solid #f1a899;
-	background: #fddfdf;
-	color: #5f3f3f;
+	border: 1px solid #cd0a0a;
+	background: #fef1ec url("images/ui-bg_glass_95_fef1ec_1x400.png") 50% 50% repeat-x;
+	color: #cd0a0a;
 }
 .ui-state-error a,
 .ui-widget-content .ui-state-error a,
 .ui-widget-header .ui-state-error a {
-	color: #5f3f3f;
+	color: #cd0a0a;
 }
 .ui-state-error-text,
 .ui-widget-content .ui-state-error-text,
 .ui-widget-header .ui-state-error-text {
-	color: #5f3f3f;
+	color: #cd0a0a;
 }
 .ui-priority-primary,
 .ui-widget-content .ui-priority-primary,
@@ -163,27 +196,31 @@
 }
 .ui-icon,
 .ui-widget-content .ui-icon {
-	background-image: url("images/ui-icons_444444_256x240.png");
+	background-image: url("images/ui-icons_222222_256x240.png");
 }
 .ui-widget-header .ui-icon {
-	background-image: url("images/ui-icons_444444_256x240.png");
-}
-.ui-state-default .ui-icon {
-	background-image: url("images/ui-icons_777777_256x240.png");
+	background-image: url("images/ui-icons_222222_256x240.png");
 }
 .ui-state-hover .ui-icon,
-.ui-state-focus .ui-icon {
-	background-image: url("images/ui-icons_555555_256x240.png");
+.ui-state-focus .ui-icon,
+.ui-button:hover .ui-icon,
+.ui-button:focus .ui-icon {
+	background-image: url("images/ui-icons_454545_256x240.png");
 }
-.ui-state-active .ui-icon {
-	background-image: url("images/ui-icons_ffffff_256x240.png");
+.ui-state-active .ui-icon,
+.ui-button:active .ui-icon {
+	background-image: url("images/ui-icons_454545_256x240.png");
 }
-.ui-state-highlight .ui-icon {
-	background-image: url("images/ui-icons_777620_256x240.png");
+.ui-state-highlight .ui-icon,
+.ui-button .ui-state-highlight.ui-icon {
+	background-image: url("images/ui-icons_2e83ff_256x240.png");
 }
 .ui-state-error .ui-icon,
 .ui-state-error-text .ui-icon {
-	background-image: url("images/ui-icons_cc0000_256x240.png");
+	background-image: url("images/ui-icons_cd0a0a_256x240.png");
+}
+.ui-button .ui-icon {
+	background-image: url("images/ui-icons_888888_256x240.png");
 }
 
 /* positioning */
@@ -192,7 +229,7 @@
 .ui-icon-caret-1-ne { background-position: -16px 0; }
 .ui-icon-caret-1-e { background-position: -32px 0; }
 .ui-icon-caret-1-se { background-position: -48px 0; }
-.ui-icon-caret-1-s { background-position: -64px 0; }
+.ui-icon-caret-1-s { background-position: -65px 0; }
 .ui-icon-caret-1-sw { background-position: -80px 0; }
 .ui-icon-caret-1-w { background-position: -96px 0; }
 .ui-icon-caret-1-nw { background-position: -112px 0; }
@@ -202,7 +239,7 @@
 .ui-icon-triangle-1-ne { background-position: -16px -16px; }
 .ui-icon-triangle-1-e { background-position: -32px -16px; }
 .ui-icon-triangle-1-se { background-position: -48px -16px; }
-.ui-icon-triangle-1-s { background-position: -64px -16px; }
+.ui-icon-triangle-1-s { background-position: -65px -16px; }
 .ui-icon-triangle-1-sw { background-position: -80px -16px; }
 .ui-icon-triangle-1-w { background-position: -96px -16px; }
 .ui-icon-triangle-1-nw { background-position: -112px -16px; }
@@ -212,7 +249,7 @@
 .ui-icon-arrow-1-ne { background-position: -16px -32px; }
 .ui-icon-arrow-1-e { background-position: -32px -32px; }
 .ui-icon-arrow-1-se { background-position: -48px -32px; }
-.ui-icon-arrow-1-s { background-position: -64px -32px; }
+.ui-icon-arrow-1-s { background-position: -65px -32px; }
 .ui-icon-arrow-1-sw { background-position: -80px -32px; }
 .ui-icon-arrow-1-w { background-position: -96px -32px; }
 .ui-icon-arrow-1-nw { background-position: -112px -32px; }
@@ -224,7 +261,7 @@
 .ui-icon-arrowstop-1-e { background-position: -208px -32px; }
 .ui-icon-arrowstop-1-s { background-position: -224px -32px; }
 .ui-icon-arrowstop-1-w { background-position: -240px -32px; }
-.ui-icon-arrowthick-1-n { background-position: 0 -48px; }
+.ui-icon-arrowthick-1-n { background-position: 1px -48px; }
 .ui-icon-arrowthick-1-ne { background-position: -16px -48px; }
 .ui-icon-arrowthick-1-e { background-position: -32px -48px; }
 .ui-icon-arrowthick-1-se { background-position: -48px -48px; }
@@ -373,25 +410,25 @@
 .ui-corner-top,
 .ui-corner-left,
 .ui-corner-tl {
-	border-top-left-radius: 3px;
+	border-top-left-radius: 4px;
 }
 .ui-corner-all,
 .ui-corner-top,
 .ui-corner-right,
 .ui-corner-tr {
-	border-top-right-radius: 3px;
+	border-top-right-radius: 4px;
 }
 .ui-corner-all,
 .ui-corner-bottom,
 .ui-corner-left,
 .ui-corner-bl {
-	border-bottom-left-radius: 3px;
+	border-bottom-left-radius: 4px;
 }
 .ui-corner-all,
 .ui-corner-bottom,
 .ui-corner-right,
 .ui-corner-br {
-	border-bottom-right-radius: 3px;
+	border-bottom-right-radius: 4px;
 }
 
 /* Overlays */
@@ -401,10 +438,6 @@
 	filter: Alpha(Opacity=30); /* support: IE8 */
 }
 .ui-widget-shadow {
-	margin: 0px 0 0 0px;
-	padding: 5px;
-	background: #666666;
-	opacity: .3;
-	filter: Alpha(Opacity=30); /* support: IE8 */
-	border-radius: 8px;
+	-webkit-box-shadow: -8px -8px 8px #aaaaaa;
+	box-shadow: -8px -8px 8px #aaaaaa;
 }
diff --git a/test/fixtures/jquery-ui-1.13.2/base/theme.css b/test/fixtures/jquery-ui-1.13.2/base/theme.css
new file mode 100644
index 0000000..8e38eb9
--- /dev/null
+++ b/test/fixtures/jquery-ui-1.13.2/base/theme.css
@@ -0,0 +1,446 @@
+/*!
+ * jQuery UI CSS Framework 1.13.2
+ * http://jqueryui.com
+ *
+ * Copyright jQuery Foundation and other contributors
+ * Released under the MIT license.
+ * http://jquery.org/license
+ *
+ * http://api.jqueryui.com/category/theming/
+ *
+ * To view and modify this theme, visit http://jqueryui.com/themeroller/
+ */
+
+
+/* Component containers
+----------------------------------*/
+.ui-widget {
+	font-family: Arial,Helvetica,sans-serif/*{ffDefault}*/;
+	font-size: 1em/*{fsDefault}*/;
+}
+.ui-widget .ui-widget {
+	font-size: 1em;
+}
+.ui-widget input,
+.ui-widget select,
+.ui-widget textarea,
+.ui-widget button {
+	font-family: Arial,Helvetica,sans-serif/*{ffDefault}*/;
+	font-size: 1em;
+}
+.ui-widget.ui-widget-content {
+	border: 1px solid #c5c5c5/*{borderColorDefault}*/;
+}
+.ui-widget-content {
+	border: 1px solid #dddddd/*{borderColorContent}*/;
+	background: #ffffff/*{bgColorContent}*/ /*{bgImgUrlContent}*/ /*{bgContentXPos}*/ /*{bgContentYPos}*/ /*{bgContentRepeat}*/;
+	color: #333333/*{fcContent}*/;
+}
+.ui-widget-content a {
+	color: #333333/*{fcContent}*/;
+}
+.ui-widget-header {
+	border: 1px solid #dddddd/*{borderColorHeader}*/;
+	background: #e9e9e9/*{bgColorHeader}*/ /*{bgImgUrlHeader}*/ /*{bgHeaderXPos}*/ /*{bgHeaderYPos}*/ /*{bgHeaderRepeat}*/;
+	color: #333333/*{fcHeader}*/;
+	font-weight: bold;
+}
+.ui-widget-header a {
+	color: #333333/*{fcHeader}*/;
+}
+
+/* Interaction states
+----------------------------------*/
+.ui-state-default,
+.ui-widget-content .ui-state-default,
+.ui-widget-header .ui-state-default,
+.ui-button,
+
+/* We use html here because we need a greater specificity to make sure disabled
+works properly when clicked or hovered */
+html .ui-button.ui-state-disabled:hover,
+html .ui-button.ui-state-disabled:active {
+	border: 1px solid #c5c5c5/*{borderColorDefault}*/;
+	background: #f6f6f6/*{bgColorDefault}*/ /*{bgImgUrlDefault}*/ /*{bgDefaultXPos}*/ /*{bgDefaultYPos}*/ /*{bgDefaultRepeat}*/;
+	font-weight: normal/*{fwDefault}*/;
+	color: #454545/*{fcDefault}*/;
+}
+.ui-state-default a,
+.ui-state-default a:link,
+.ui-state-default a:visited,
+a.ui-button,
+a:link.ui-button,
+a:visited.ui-button,
+.ui-button {
+	color: #454545/*{fcDefault}*/;
+	text-decoration: none;
+}
+.ui-state-hover,
+.ui-widget-content .ui-state-hover,
+.ui-widget-header .ui-state-hover,
+.ui-state-focus,
+.ui-widget-content .ui-state-focus,
+.ui-widget-header .ui-state-focus,
+.ui-button:hover,
+.ui-button:focus {
+	border: 1px solid #cccccc/*{borderColorHover}*/;
+	background: #ededed/*{bgColorHover}*/ /*{bgImgUrlHover}*/ /*{bgHoverXPos}*/ /*{bgHoverYPos}*/ /*{bgHoverRepeat}*/;
+	font-weight: normal/*{fwDefault}*/;
+	color: #2b2b2b/*{fcHover}*/;
+}
+.ui-state-hover a,
+.ui-state-hover a:hover,
+.ui-state-hover a:link,
+.ui-state-hover a:visited,
+.ui-state-focus a,
+.ui-state-focus a:hover,
+.ui-state-focus a:link,
+.ui-state-focus a:visited,
+a.ui-button:hover,
+a.ui-button:focus {
+	color: #2b2b2b/*{fcHover}*/;
+	text-decoration: none;
+}
+
+.ui-visual-focus {
+	box-shadow: 0 0 3px 1px rgb(94, 158, 214);
+}
+.ui-state-active,
+.ui-widget-content .ui-state-active,
+.ui-widget-header .ui-state-active,
+a.ui-button:active,
+.ui-button:active,
+.ui-button.ui-state-active:hover {
+	border: 1px solid #003eff/*{borderColorActive}*/;
+	background: #007fff/*{bgColorActive}*/ /*{bgImgUrlActive}*/ /*{bgActiveXPos}*/ /*{bgActiveYPos}*/ /*{bgActiveRepeat}*/;
+	font-weight: normal/*{fwDefault}*/;
+	color: #ffffff/*{fcActive}*/;
+}
+.ui-icon-background,
+.ui-state-active .ui-icon-background {
+	border: #003eff/*{borderColorActive}*/;
+	background-color: #ffffff/*{fcActive}*/;
+}
+.ui-state-active a,
+.ui-state-active a:link,
+.ui-state-active a:visited {
+	color: #ffffff/*{fcActive}*/;
+	text-decoration: none;
+}
+
+/* Interaction Cues
+----------------------------------*/
+.ui-state-highlight,
+.ui-widget-content .ui-state-highlight,
+.ui-widget-header .ui-state-highlight {
+	border: 1px solid #dad55e/*{borderColorHighlight}*/;
+	background: #fffa90/*{bgColorHighlight}*/ /*{bgImgUrlHighlight}*/ /*{bgHighlightXPos}*/ /*{bgHighlightYPos}*/ /*{bgHighlightRepeat}*/;
+	color: #777620/*{fcHighlight}*/;
+}
+.ui-state-checked {
+	border: 1px solid #dad55e/*{borderColorHighlight}*/;
+	background: #fffa90/*{bgColorHighlight}*/;
+}
+.ui-state-highlight a,
+.ui-widget-content .ui-state-highlight a,
+.ui-widget-header .ui-state-highlight a {
+	color: #777620/*{fcHighlight}*/;
+}
+.ui-state-error,
+.ui-widget-content .ui-state-error,
+.ui-widget-header .ui-state-error {
+	border: 1px solid #f1a899/*{borderColorError}*/;
+	background: #fddfdf/*{bgColorError}*/ /*{bgImgUrlError}*/ /*{bgErrorXPos}*/ /*{bgErrorYPos}*/ /*{bgErrorRepeat}*/;
+	color: #5f3f3f/*{fcError}*/;
+}
+.ui-state-error a,
+.ui-widget-content .ui-state-error a,
+.ui-widget-header .ui-state-error a {
+	color: #5f3f3f/*{fcError}*/;
+}
+.ui-state-error-text,
+.ui-widget-content .ui-state-error-text,
+.ui-widget-header .ui-state-error-text {
+	color: #5f3f3f/*{fcError}*/;
+}
+.ui-priority-primary,
+.ui-widget-content .ui-priority-primary,
+.ui-widget-header .ui-priority-primary {
+	font-weight: bold;
+}
+.ui-priority-secondary,
+.ui-widget-content .ui-priority-secondary,
+.ui-widget-header .ui-priority-secondary {
+	opacity: .7;
+	-ms-filter: "alpha(opacity=70)"; /* support: IE8 */
+	font-weight: normal;
+}
+.ui-state-disabled,
+.ui-widget-content .ui-state-disabled,
+.ui-widget-header .ui-state-disabled {
+	opacity: .35;
+	-ms-filter: "alpha(opacity=35)"; /* support: IE8 */
+	background-image: none;
+}
+.ui-state-disabled .ui-icon {
+	-ms-filter: "alpha(opacity=35)"; /* support: IE8 - See #6059 */
+}
+
+/* Icons
+----------------------------------*/
+
+/* states and images */
+.ui-icon {
+	width: 16px;
+	height: 16px;
+}
+.ui-icon,
+.ui-widget-content .ui-icon {
+	background-image: url("images/ui-icons_444444_256x240.png")/*{iconsContent}*/;
+}
+.ui-widget-header .ui-icon {
+	background-image: url("images/ui-icons_444444_256x240.png")/*{iconsHeader}*/;
+}
+.ui-state-hover .ui-icon,
+.ui-state-focus .ui-icon,
+.ui-button:hover .ui-icon,
+.ui-button:focus .ui-icon {
+	background-image: url("images/ui-icons_555555_256x240.png")/*{iconsHover}*/;
+}
+.ui-state-active .ui-icon,
+.ui-button:active .ui-icon {
+	background-image: url("images/ui-icons_ffffff_256x240.png")/*{iconsActive}*/;
+}
+.ui-state-highlight .ui-icon,
+.ui-button .ui-state-highlight.ui-icon {
+	background-image: url("images/ui-icons_777620_256x240.png")/*{iconsHighlight}*/;
+}
+.ui-state-error .ui-icon,
+.ui-state-error-text .ui-icon {
+	background-image: url("images/ui-icons_cc0000_256x240.png")/*{iconsError}*/;
+}
+.ui-button .ui-icon {
+	background-image: url("images/ui-icons_777777_256x240.png")/*{iconsDefault}*/;
+}
+
+/* positioning */
+/* Three classes needed to override `.ui-button:hover .ui-icon` */
+.ui-icon-blank.ui-icon-blank.ui-icon-blank {
+	background-image: none;
+}
+.ui-icon-caret-1-n { background-position: 0 0; }
+.ui-icon-caret-1-ne { background-position: -16px 0; }
+.ui-icon-caret-1-e { background-position: -32px 0; }
+.ui-icon-caret-1-se { background-position: -48px 0; }
+.ui-icon-caret-1-s { background-position: -65px 0; }
+.ui-icon-caret-1-sw { background-position: -80px 0; }
+.ui-icon-caret-1-w { background-position: -96px 0; }
+.ui-icon-caret-1-nw { background-position: -112px 0; }
+.ui-icon-caret-2-n-s { background-position: -128px 0; }
+.ui-icon-caret-2-e-w { background-position: -144px 0; }
+.ui-icon-triangle-1-n { background-position: 0 -16px; }
+.ui-icon-triangle-1-ne { background-position: -16px -16px; }
+.ui-icon-triangle-1-e { background-position: -32px -16px; }
+.ui-icon-triangle-1-se { background-position: -48px -16px; }
+.ui-icon-triangle-1-s { background-position: -65px -16px; }
+.ui-icon-triangle-1-sw { background-position: -80px -16px; }
+.ui-icon-triangle-1-w { background-position: -96px -16px; }
+.ui-icon-triangle-1-nw { background-position: -112px -16px; }
+.ui-icon-triangle-2-n-s { background-position: -128px -16px; }
+.ui-icon-triangle-2-e-w { background-position: -144px -16px; }
+.ui-icon-arrow-1-n { background-position: 0 -32px; }
+.ui-icon-arrow-1-ne { background-position: -16px -32px; }
+.ui-icon-arrow-1-e { background-position: -32px -32px; }
+.ui-icon-arrow-1-se { background-position: -48px -32px; }
+.ui-icon-arrow-1-s { background-position: -65px -32px; }
+.ui-icon-arrow-1-sw { background-position: -80px -32px; }
+.ui-icon-arrow-1-w { background-position: -96px -32px; }
+.ui-icon-arrow-1-nw { background-position: -112px -32px; }
+.ui-icon-arrow-2-n-s { background-position: -128px -32px; }
+.ui-icon-arrow-2-ne-sw { background-position: -144px -32px; }
+.ui-icon-arrow-2-e-w { background-position: -160px -32px; }
+.ui-icon-arrow-2-se-nw { background-position: -176px -32px; }
+.ui-icon-arrowstop-1-n { background-position: -192px -32px; }
+.ui-icon-arrowstop-1-e { background-position: -208px -32px; }
+.ui-icon-arrowstop-1-s { background-position: -224px -32px; }
+.ui-icon-arrowstop-1-w { background-position: -240px -32px; }
+.ui-icon-arrowthick-1-n { background-position: 1px -48px; }
+.ui-icon-arrowthick-1-ne { background-position: -16px -48px; }
+.ui-icon-arrowthick-1-e { background-position: -32px -48px; }
+.ui-icon-arrowthick-1-se { background-position: -48px -48px; }
+.ui-icon-arrowthick-1-s { background-position: -64px -48px; }
+.ui-icon-arrowthick-1-sw { background-position: -80px -48px; }
+.ui-icon-arrowthick-1-w { background-position: -96px -48px; }
+.ui-icon-arrowthick-1-nw { background-position: -112px -48px; }
+.ui-icon-arrowthick-2-n-s { background-position: -128px -48px; }
+.ui-icon-arrowthick-2-ne-sw { background-position: -144px -48px; }
+.ui-icon-arrowthick-2-e-w { background-position: -160px -48px; }
+.ui-icon-arrowthick-2-se-nw { background-position: -176px -48px; }
+.ui-icon-arrowthickstop-1-n { background-position: -192px -48px; }
+.ui-icon-arrowthickstop-1-e { background-position: -208px -48px; }
+.ui-icon-arrowthickstop-1-s { background-position: -224px -48px; }
+.ui-icon-arrowthickstop-1-w { background-position: -240px -48px; }
+.ui-icon-arrowreturnthick-1-w { background-position: 0 -64px; }
+.ui-icon-arrowreturnthick-1-n { background-position: -16px -64px; }
+.ui-icon-arrowreturnthick-1-e { background-position: -32px -64px; }
+.ui-icon-arrowreturnthick-1-s { background-position: -48px -64px; }
+.ui-icon-arrowreturn-1-w { background-position: -64px -64px; }
+.ui-icon-arrowreturn-1-n { background-position: -80px -64px; }
+.ui-icon-arrowreturn-1-e { background-position: -96px -64px; }
+.ui-icon-arrowreturn-1-s { background-position: -112px -64px; }
+.ui-icon-arrowrefresh-1-w { background-position: -128px -64px; }
+.ui-icon-arrowrefresh-1-n { background-position: -144px -64px; }
+.ui-icon-arrowrefresh-1-e { background-position: -160px -64px; }
+.ui-icon-arrowrefresh-1-s { background-position: -176px -64px; }
+.ui-icon-arrow-4 { background-position: 0 -80px; }
+.ui-icon-arrow-4-diag { background-position: -16px -80px; }
+.ui-icon-extlink { background-position: -32px -80px; }
+.ui-icon-newwin { background-position: -48px -80px; }
+.ui-icon-refresh { background-position: -64px -80px; }
+.ui-icon-shuffle { background-position: -80px -80px; }
+.ui-icon-transfer-e-w { background-position: -96px -80px; }
+.ui-icon-transferthick-e-w { background-position: -112px -80px; }
+.ui-icon-folder-collapsed { background-position: 0 -96px; }
+.ui-icon-folder-open { background-position: -16px -96px; }
+.ui-icon-document { background-position: -32px -96px; }
+.ui-icon-document-b { background-position: -48px -96px; }
+.ui-icon-note { background-position: -64px -96px; }
+.ui-icon-mail-closed { background-position: -80px -96px; }
+.ui-icon-mail-open { background-position: -96px -96px; }
+.ui-icon-suitcase { background-position: -112px -96px; }
+.ui-icon-comment { background-position: -128px -96px; }
+.ui-icon-person { background-position: -144px -96px; }
+.ui-icon-print { background-position: -160px -96px; }
+.ui-icon-trash { background-position: -176px -96px; }
+.ui-icon-locked { background-position: -192px -96px; }
+.ui-icon-unlocked { background-position: -208px -96px; }
+.ui-icon-bookmark { background-position: -224px -96px; }
+.ui-icon-tag { background-position: -240px -96px; }
+.ui-icon-home { background-position: 0 -112px; }
+.ui-icon-flag { background-position: -16px -112px; }
+.ui-icon-calendar { background-position: -32px -112px; }
+.ui-icon-cart { background-position: -48px -112px; }
+.ui-icon-pencil { background-position: -64px -112px; }
+.ui-icon-clock { background-position: -80px -112px; }
+.ui-icon-disk { background-position: -96px -112px; }
+.ui-icon-calculator { background-position: -112px -112px; }
+.ui-icon-zoomin { background-position: -128px -112px; }
+.ui-icon-zoomout { background-position: -144px -112px; }
+.ui-icon-search { background-position: -160px -112px; }
+.ui-icon-wrench { background-position: -176px -112px; }
+.ui-icon-gear { background-position: -192px -112px; }
+.ui-icon-heart { background-position: -208px -112px; }
+.ui-icon-star { background-position: -224px -112px; }
+.ui-icon-link { background-position: -240px -112px; }
+.ui-icon-cancel { background-position: 0 -128px; }
+.ui-icon-plus { background-position: -16px -128px; }
+.ui-icon-plusthick { background-position: -32px -128px; }
+.ui-icon-minus { background-position: -48px -128px; }
+.ui-icon-minusthick { background-position: -64px -128px; }
+.ui-icon-close { background-position: -80px -128px; }
+.ui-icon-closethick { background-position: -96px -128px; }
+.ui-icon-key { background-position: -112px -128px; }
+.ui-icon-lightbulb { background-position: -128px -128px; }
+.ui-icon-scissors { background-position: -144px -128px; }
+.ui-icon-clipboard { background-position: -160px -128px; }
+.ui-icon-copy { background-position: -176px -128px; }
+.ui-icon-contact { background-position: -192px -128px; }
+.ui-icon-image { background-position: -208px -128px; }
+.ui-icon-video { background-position: -224px -128px; }
+.ui-icon-script { background-position: -240px -128px; }
+.ui-icon-alert { background-position: 0 -144px; }
+.ui-icon-info { background-position: -16px -144px; }
+.ui-icon-notice { background-position: -32px -144px; }
+.ui-icon-help { background-position: -48px -144px; }
+.ui-icon-check { background-position: -64px -144px; }
+.ui-icon-bullet { background-position: -80px -144px; }
+.ui-icon-radio-on { background-position: -96px -144px; }
+.ui-icon-radio-off { background-position: -112px -144px; }
+.ui-icon-pin-w { background-position: -128px -144px; }
+.ui-icon-pin-s { background-position: -144px -144px; }
+.ui-icon-play { background-position: 0 -160px; }
+.ui-icon-pause { background-position: -16px -160px; }
+.ui-icon-seek-next { background-position: -32px -160px; }
+.ui-icon-seek-prev { background-position: -48px -160px; }
+.ui-icon-seek-end { background-position: -64px -160px; }
+.ui-icon-seek-start { background-position: -80px -160px; }
+/* ui-icon-seek-first is deprecated, use ui-icon-seek-start instead */
+.ui-icon-seek-first { background-position: -80px -160px; }
+.ui-icon-stop { background-position: -96px -160px; }
+.ui-icon-eject { background-position: -112px -160px; }
+.ui-icon-volume-off { background-position: -128px -160px; }
+.ui-icon-volume-on { background-position: -144px -160px; }
+.ui-icon-power { background-position: 0 -176px; }
+.ui-icon-signal-diag { background-position: -16px -176px; }
+.ui-icon-signal { background-position: -32px -176px; }
+.ui-icon-battery-0 { background-position: -48px -176px; }
+.ui-icon-battery-1 { background-position: -64px -176px; }
+.ui-icon-battery-2 { background-position: -80px -176px; }
+.ui-icon-battery-3 { background-position: -96px -176px; }
+.ui-icon-circle-plus { background-position: 0 -192px; }
+.ui-icon-circle-minus { background-position: -16px -192px; }
+.ui-icon-circle-close { background-position: -32px -192px; }
+.ui-icon-circle-triangle-e { background-position: -48px -192px; }
+.ui-icon-circle-triangle-s { background-position: -64px -192px; }
+.ui-icon-circle-triangle-w { background-position: -80px -192px; }
+.ui-icon-circle-triangle-n { background-position: -96px -192px; }
+.ui-icon-circle-arrow-e { background-position: -112px -192px; }
+.ui-icon-circle-arrow-s { background-position: -128px -192px; }
+.ui-icon-circle-arrow-w { background-position: -144px -192px; }
+.ui-icon-circle-arrow-n { background-position: -160px -192px; }
+.ui-icon-circle-zoomin { background-position: -176px -192px; }
+.ui-icon-circle-zoomout { background-position: -192px -192px; }
+.ui-icon-circle-check { background-position: -208px -192px; }
+.ui-icon-circlesmall-plus { background-position: 0 -208px; }
+.ui-icon-circlesmall-minus { background-position: -16px -208px; }
+.ui-icon-circlesmall-close { background-position: -32px -208px; }
+.ui-icon-squaresmall-plus { background-position: -48px -208px; }
+.ui-icon-squaresmall-minus { background-position: -64px -208px; }
+.ui-icon-squaresmall-close { background-position: -80px -208px; }
+.ui-icon-grip-dotted-vertical { background-position: 0 -224px; }
+.ui-icon-grip-dotted-horizontal { background-position: -16px -224px; }
+.ui-icon-grip-solid-vertical { background-position: -32px -224px; }
+.ui-icon-grip-solid-horizontal { background-position: -48px -224px; }
+.ui-icon-gripsmall-diagonal-se { background-position: -64px -224px; }
+.ui-icon-grip-diagonal-se { background-position: -80px -224px; }
+
+
+/* Misc visuals
+----------------------------------*/
+
+/* Corner radius */
+.ui-corner-all,
+.ui-corner-top,
+.ui-corner-left,
+.ui-corner-tl {
+	border-top-left-radius: 3px/*{cornerRadius}*/;
+}
+.ui-corner-all,
+.ui-corner-top,
+.ui-corner-right,
+.ui-corner-tr {
+	border-top-right-radius: 3px/*{cornerRadius}*/;
+}
+.ui-corner-all,
+.ui-corner-bottom,
+.ui-corner-left,
+.ui-corner-bl {
+	border-bottom-left-radius: 3px/*{cornerRadius}*/;
+}
+.ui-corner-all,
+.ui-corner-bottom,
+.ui-corner-right,
+.ui-corner-br {
+	border-bottom-right-radius: 3px/*{cornerRadius}*/;
+}
+
+/* Overlays */
+.ui-widget-overlay {
+	background: #aaaaaa/*{bgColorOverlay}*/ /*{bgImgUrlOverlay}*/ /*{bgOverlayXPos}*/ /*{bgOverlayYPos}*/ /*{bgOverlayRepeat}*/;
+	opacity: .3/*{opacityOverlay}*/;
+	-ms-filter: "alpha(opacity=30)"/*{opacityFilterOverlay}*/; /* support: IE8 */
+}
+.ui-widget-shadow {
+	-webkit-box-shadow: 0/*{offsetLeftShadow}*/ 0/*{offsetTopShadow}*/ 5px/*{thicknessShadow}*/ #666666/*{bgColorShadow}*/;
+	box-shadow: 0/*{offsetLeftShadow}*/ 0/*{offsetTopShadow}*/ 5px/*{thicknessShadow}*/ #666666/*{bgColorShadow}*/;
+}
diff --git a/test/fixtures/jquery-ui-1.13.2/themes/smoothness.css b/test/fixtures/jquery-ui-1.13.2/themes/smoothness.css
new file mode 100644
index 0000000..e4fa82c
--- /dev/null
+++ b/test/fixtures/jquery-ui-1.13.2/themes/smoothness.css
@@ -0,0 +1,446 @@
+/*!
+ * jQuery UI CSS Framework 1.13.2
+ * http://jqueryui.com
+ *
+ * Copyright jQuery Foundation and other contributors
+ * Released under the MIT license.
+ * http://jquery.org/license
+ *
+ * http://api.jqueryui.com/category/theming/
+ *
+ * To view and modify this theme, visit http://jqueryui.com/themeroller/?cornerRadiusShadow=8px&offsetLeftShadow=-8px&offsetTopShadow=-8px&thicknessShadow=8px&opacityShadow=30&bgImgOpacityShadow=0&bgTextureShadow=flat&bgColorShadow=aaaaaa&opacityOverlay=30&bgImgOpacityOverlay=0&bgTextureOverlay=flat&bgColorOverlay=aaaaaa&iconColorError=cd0a0a&fcError=cd0a0a&borderColorError=cd0a0a&bgImgOpacityError=95&bgTextureError=glass&bgColorError=fef1ec&iconColorHighlight=2e83ff&fcHighlight=363636&borderColorHighlight=fcefa1&bgImgOpacityHighlight=55&bgTextureHighlight=glass&bgColorHighlight=fbf9ee&iconColorActive=454545&fcActive=212121&borderColorActive=aaaaaa&bgImgOpacityActive=65&bgTextureActive=glass&bgColorActive=ffffff&iconColorHover=454545&fcHover=212121&borderColorHover=999999&bgImgOpacityHover=75&bgTextureHover=glass&bgColorHover=dadada&iconColorDefault=888888&fcDefault=555555&borderColorDefault=d3d3d3&bgImgOpacityDefault=75&bgTextureDefault=glass&bgColorDefault=e6e6e6&iconColorContent=222222&fcContent=222222&borderColorContent=aaaaaa&bgImgOpacityContent=75&bgTextureContent=flat&bgColorContent=ffffff&iconColorHeader=222222&fcHeader=222222&borderColorHeader=aaaaaa&bgImgOpacityHeader=75&bgTextureHeader=highlight_soft&bgColorHeader=cccccc&cornerRadius=4px&fsDefault=1.1em&fwDefault=normal&ffDefault=Verdana%2CArial%2Csans-serif
+ */
+
+
+/* Component containers
+----------------------------------*/
+.ui-widget {
+	font-family: Verdana,Arial,sans-serif;
+	font-size: 1.1em;
+}
+.ui-widget .ui-widget {
+	font-size: 1em;
+}
+.ui-widget input,
+.ui-widget select,
+.ui-widget textarea,
+.ui-widget button {
+	font-family: Verdana,Arial,sans-serif;
+	font-size: 1em;
+}
+.ui-widget.ui-widget-content {
+	border: 1px solid #d3d3d3;
+}
+.ui-widget-content {
+	border: 1px solid #aaaaaa;
+	background: #ffffff;
+	color: #222222;
+}
+.ui-widget-content a {
+	color: #222222;
+}
+.ui-widget-header {
+	border: 1px solid #aaaaaa;
+	background: #cccccc url("images/ui-bg_highlight-soft_75_cccccc_1x100.png") 50% 50% repeat-x;
+	color: #222222;
+	font-weight: bold;
+}
+.ui-widget-header a {
+	color: #222222;
+}
+
+/* Interaction states
+----------------------------------*/
+.ui-state-default,
+.ui-widget-content .ui-state-default,
+.ui-widget-header .ui-state-default,
+.ui-button,
+
+/* We use html here because we need a greater specificity to make sure disabled
+works properly when clicked or hovered */
+html .ui-button.ui-state-disabled:hover,
+html .ui-button.ui-state-disabled:active {
+	border: 1px solid #d3d3d3;
+	background: #e6e6e6 url("images/ui-bg_glass_75_e6e6e6_1x400.png") 50% 50% repeat-x;
+	font-weight: normal;
+	color: #555555;
+}
+.ui-state-default a,
+.ui-state-default a:link,
+.ui-state-default a:visited,
+a.ui-button,
+a:link.ui-button,
+a:visited.ui-button,
+.ui-button {
+	color: #555555;
+	text-decoration: none;
+}
+.ui-state-hover,
+.ui-widget-content .ui-state-hover,
+.ui-widget-header .ui-state-hover,
+.ui-state-focus,
+.ui-widget-content .ui-state-focus,
+.ui-widget-header .ui-state-focus,
+.ui-button:hover,
+.ui-button:focus {
+	border: 1px solid #999999;
+	background: #dadada url("images/ui-bg_glass_75_dadada_1x400.png") 50% 50% repeat-x;
+	font-weight: normal;
+	color: #212121;
+}
+.ui-state-hover a,
+.ui-state-hover a:hover,
+.ui-state-hover a:link,
+.ui-state-hover a:visited,
+.ui-state-focus a,
+.ui-state-focus a:hover,
+.ui-state-focus a:link,
+.ui-state-focus a:visited,
+a.ui-button:hover,
+a.ui-button:focus {
+	color: #212121;
+	text-decoration: none;
+}
+
+.ui-visual-focus {
+	box-shadow: 0 0 3px 1px rgb(94, 158, 214);
+}
+.ui-state-active,
+.ui-widget-content .ui-state-active,
+.ui-widget-header .ui-state-active,
+a.ui-button:active,
+.ui-button:active,
+.ui-button.ui-state-active:hover {
+	border: 1px solid #aaaaaa;
+	background: #ffffff url("images/ui-bg_glass_65_ffffff_1x400.png") 50% 50% repeat-x;
+	font-weight: normal;
+	color: #212121;
+}
+.ui-icon-background,
+.ui-state-active .ui-icon-background {
+	border: #aaaaaa;
+	background-color: #212121;
+}
+.ui-state-active a,
+.ui-state-active a:link,
+.ui-state-active a:visited {
+	color: #212121;
+	text-decoration: none;
+}
+
+/* Interaction Cues
+----------------------------------*/
+.ui-state-highlight,
+.ui-widget-content .ui-state-highlight,
+.ui-widget-header .ui-state-highlight {
+	border: 1px solid #fcefa1;
+	background: #fbf9ee url("images/ui-bg_glass_55_fbf9ee_1x400.png") 50% 50% repeat-x;
+	color: #363636;
+}
+.ui-state-checked {
+	border: 1px solid #fcefa1;
+	background: #fbf9ee;
+}
+.ui-state-highlight a,
+.ui-widget-content .ui-state-highlight a,
+.ui-widget-header .ui-state-highlight a {
+	color: #363636;
+}
+.ui-state-error,
+.ui-widget-content .ui-state-error,
+.ui-widget-header .ui-state-error {
+	border: 1px solid #cd0a0a;
+	background: #fef1ec url("images/ui-bg_glass_95_fef1ec_1x400.png") 50% 50% repeat-x;
+	color: #cd0a0a;
+}
+.ui-state-error a,
+.ui-widget-content .ui-state-error a,
+.ui-widget-header .ui-state-error a {
+	color: #cd0a0a;
+}
+.ui-state-error-text,
+.ui-widget-content .ui-state-error-text,
+.ui-widget-header .ui-state-error-text {
+	color: #cd0a0a;
+}
+.ui-priority-primary,
+.ui-widget-content .ui-priority-primary,
+.ui-widget-header .ui-priority-primary {
+	font-weight: bold;
+}
+.ui-priority-secondary,
+.ui-widget-content .ui-priority-secondary,
+.ui-widget-header .ui-priority-secondary {
+	opacity: .7;
+	-ms-filter: "alpha(opacity=70)"; /* support: IE8 */
+	font-weight: normal;
+}
+.ui-state-disabled,
+.ui-widget-content .ui-state-disabled,
+.ui-widget-header .ui-state-disabled {
+	opacity: .35;
+	-ms-filter: "alpha(opacity=35)"; /* support: IE8 */
+	background-image: none;
+}
+.ui-state-disabled .ui-icon {
+	-ms-filter: "alpha(opacity=35)"; /* support: IE8 - See #6059 */
+}
+
+/* Icons
+----------------------------------*/
+
+/* states and images */
+.ui-icon {
+	width: 16px;
+	height: 16px;
+}
+.ui-icon,
+.ui-widget-content .ui-icon {
+	background-image: url("images/ui-icons_222222_256x240.png");
+}
+.ui-widget-header .ui-icon {
+	background-image: url("images/ui-icons_222222_256x240.png");
+}
+.ui-state-hover .ui-icon,
+.ui-state-focus .ui-icon,
+.ui-button:hover .ui-icon,
+.ui-button:focus .ui-icon {
+	background-image: url("images/ui-icons_454545_256x240.png");
+}
+.ui-state-active .ui-icon,
+.ui-button:active .ui-icon {
+	background-image: url("images/ui-icons_454545_256x240.png");
+}
+.ui-state-highlight .ui-icon,
+.ui-button .ui-state-highlight.ui-icon {
+	background-image: url("images/ui-icons_2e83ff_256x240.png");
+}
+.ui-state-error .ui-icon,
+.ui-state-error-text .ui-icon {
+	background-image: url("images/ui-icons_cd0a0a_256x240.png");
+}
+.ui-button .ui-icon {
+	background-image: url("images/ui-icons_888888_256x240.png");
+}
+
+/* positioning */
+/* Three classes needed to override `.ui-button:hover .ui-icon` */
+.ui-icon-blank.ui-icon-blank.ui-icon-blank {
+	background-image: none;
+}
+.ui-icon-caret-1-n { background-position: 0 0; }
+.ui-icon-caret-1-ne { background-position: -16px 0; }
+.ui-icon-caret-1-e { background-position: -32px 0; }
+.ui-icon-caret-1-se { background-position: -48px 0; }
+.ui-icon-caret-1-s { background-position: -65px 0; }
+.ui-icon-caret-1-sw { background-position: -80px 0; }
+.ui-icon-caret-1-w { background-position: -96px 0; }
+.ui-icon-caret-1-nw { background-position: -112px 0; }
+.ui-icon-caret-2-n-s { background-position: -128px 0; }
+.ui-icon-caret-2-e-w { background-position: -144px 0; }
+.ui-icon-triangle-1-n { background-position: 0 -16px; }
+.ui-icon-triangle-1-ne { background-position: -16px -16px; }
+.ui-icon-triangle-1-e { background-position: -32px -16px; }
+.ui-icon-triangle-1-se { background-position: -48px -16px; }
+.ui-icon-triangle-1-s { background-position: -65px -16px; }
+.ui-icon-triangle-1-sw { background-position: -80px -16px; }
+.ui-icon-triangle-1-w { background-position: -96px -16px; }
+.ui-icon-triangle-1-nw { background-position: -112px -16px; }
+.ui-icon-triangle-2-n-s { background-position: -128px -16px; }
+.ui-icon-triangle-2-e-w { background-position: -144px -16px; }
+.ui-icon-arrow-1-n { background-position: 0 -32px; }
+.ui-icon-arrow-1-ne { background-position: -16px -32px; }
+.ui-icon-arrow-1-e { background-position: -32px -32px; }
+.ui-icon-arrow-1-se { background-position: -48px -32px; }
+.ui-icon-arrow-1-s { background-position: -65px -32px; }
+.ui-icon-arrow-1-sw { background-position: -80px -32px; }
+.ui-icon-arrow-1-w { background-position: -96px -32px; }
+.ui-icon-arrow-1-nw { background-position: -112px -32px; }
+.ui-icon-arrow-2-n-s { background-position: -128px -32px; }
+.ui-icon-arrow-2-ne-sw { background-position: -144px -32px; }
+.ui-icon-arrow-2-e-w { background-position: -160px -32px; }
+.ui-icon-arrow-2-se-nw { background-position: -176px -32px; }
+.ui-icon-arrowstop-1-n { background-position: -192px -32px; }
+.ui-icon-arrowstop-1-e { background-position: -208px -32px; }
+.ui-icon-arrowstop-1-s { background-position: -224px -32px; }
+.ui-icon-arrowstop-1-w { background-position: -240px -32px; }
+.ui-icon-arrowthick-1-n { background-position: 1px -48px; }
+.ui-icon-arrowthick-1-ne { background-position: -16px -48px; }
+.ui-icon-arrowthick-1-e { background-position: -32px -48px; }
+.ui-icon-arrowthick-1-se { background-position: -48px -48px; }
+.ui-icon-arrowthick-1-s { background-position: -64px -48px; }
+.ui-icon-arrowthick-1-sw { background-position: -80px -48px; }
+.ui-icon-arrowthick-1-w { background-position: -96px -48px; }
+.ui-icon-arrowthick-1-nw { background-position: -112px -48px; }
+.ui-icon-arrowthick-2-n-s { background-position: -128px -48px; }
+.ui-icon-arrowthick-2-ne-sw { background-position: -144px -48px; }
+.ui-icon-arrowthick-2-e-w { background-position: -160px -48px; }
+.ui-icon-arrowthick-2-se-nw { background-position: -176px -48px; }
+.ui-icon-arrowthickstop-1-n { background-position: -192px -48px; }
+.ui-icon-arrowthickstop-1-e { background-position: -208px -48px; }
+.ui-icon-arrowthickstop-1-s { background-position: -224px -48px; }
+.ui-icon-arrowthickstop-1-w { background-position: -240px -48px; }
+.ui-icon-arrowreturnthick-1-w { background-position: 0 -64px; }
+.ui-icon-arrowreturnthick-1-n { background-position: -16px -64px; }
+.ui-icon-arrowreturnthick-1-e { background-position: -32px -64px; }
+.ui-icon-arrowreturnthick-1-s { background-position: -48px -64px; }
+.ui-icon-arrowreturn-1-w { background-position: -64px -64px; }
+.ui-icon-arrowreturn-1-n { background-position: -80px -64px; }
+.ui-icon-arrowreturn-1-e { background-position: -96px -64px; }
+.ui-icon-arrowreturn-1-s { background-position: -112px -64px; }
+.ui-icon-arrowrefresh-1-w { background-position: -128px -64px; }
+.ui-icon-arrowrefresh-1-n { background-position: -144px -64px; }
+.ui-icon-arrowrefresh-1-e { background-position: -160px -64px; }
+.ui-icon-arrowrefresh-1-s { background-position: -176px -64px; }
+.ui-icon-arrow-4 { background-position: 0 -80px; }
+.ui-icon-arrow-4-diag { background-position: -16px -80px; }
+.ui-icon-extlink { background-position: -32px -80px; }
+.ui-icon-newwin { background-position: -48px -80px; }
+.ui-icon-refresh { background-position: -64px -80px; }
+.ui-icon-shuffle { background-position: -80px -80px; }
+.ui-icon-transfer-e-w { background-position: -96px -80px; }
+.ui-icon-transferthick-e-w { background-position: -112px -80px; }
+.ui-icon-folder-collapsed { background-position: 0 -96px; }
+.ui-icon-folder-open { background-position: -16px -96px; }
+.ui-icon-document { background-position: -32px -96px; }
+.ui-icon-document-b { background-position: -48px -96px; }
+.ui-icon-note { background-position: -64px -96px; }
+.ui-icon-mail-closed { background-position: -80px -96px; }
+.ui-icon-mail-open { background-position: -96px -96px; }
+.ui-icon-suitcase { background-position: -112px -96px; }
+.ui-icon-comment { background-position: -128px -96px; }
+.ui-icon-person { background-position: -144px -96px; }
+.ui-icon-print { background-position: -160px -96px; }
+.ui-icon-trash { background-position: -176px -96px; }
+.ui-icon-locked { background-position: -192px -96px; }
+.ui-icon-unlocked { background-position: -208px -96px; }
+.ui-icon-bookmark { background-position: -224px -96px; }
+.ui-icon-tag { background-position: -240px -96px; }
+.ui-icon-home { background-position: 0 -112px; }
+.ui-icon-flag { background-position: -16px -112px; }
+.ui-icon-calendar { background-position: -32px -112px; }
+.ui-icon-cart { background-position: -48px -112px; }
+.ui-icon-pencil { background-position: -64px -112px; }
+.ui-icon-clock { background-position: -80px -112px; }
+.ui-icon-disk { background-position: -96px -112px; }
+.ui-icon-calculator { background-position: -112px -112px; }
+.ui-icon-zoomin { background-position: -128px -112px; }
+.ui-icon-zoomout { background-position: -144px -112px; }
+.ui-icon-search { background-position: -160px -112px; }
+.ui-icon-wrench { background-position: -176px -112px; }
+.ui-icon-gear { background-position: -192px -112px; }
+.ui-icon-heart { background-position: -208px -112px; }
+.ui-icon-star { background-position: -224px -112px; }
+.ui-icon-link { background-position: -240px -112px; }
+.ui-icon-cancel { background-position: 0 -128px; }
+.ui-icon-plus { background-position: -16px -128px; }
+.ui-icon-plusthick { background-position: -32px -128px; }
+.ui-icon-minus { background-position: -48px -128px; }
+.ui-icon-minusthick { background-position: -64px -128px; }
+.ui-icon-close { background-position: -80px -128px; }
+.ui-icon-closethick { background-position: -96px -128px; }
+.ui-icon-key { background-position: -112px -128px; }
+.ui-icon-lightbulb { background-position: -128px -128px; }
+.ui-icon-scissors { background-position: -144px -128px; }
+.ui-icon-clipboard { background-position: -160px -128px; }
+.ui-icon-copy { background-position: -176px -128px; }
+.ui-icon-contact { background-position: -192px -128px; }
+.ui-icon-image { background-position: -208px -128px; }
+.ui-icon-video { background-position: -224px -128px; }
+.ui-icon-script { background-position: -240px -128px; }
+.ui-icon-alert { background-position: 0 -144px; }
+.ui-icon-info { background-position: -16px -144px; }
+.ui-icon-notice { background-position: -32px -144px; }
+.ui-icon-help { background-position: -48px -144px; }
+.ui-icon-check { background-position: -64px -144px; }
+.ui-icon-bullet { background-position: -80px -144px; }
+.ui-icon-radio-on { background-position: -96px -144px; }
+.ui-icon-radio-off { background-position: -112px -144px; }
+.ui-icon-pin-w { background-position: -128px -144px; }
+.ui-icon-pin-s { background-position: -144px -144px; }
+.ui-icon-play { background-position: 0 -160px; }
+.ui-icon-pause { background-position: -16px -160px; }
+.ui-icon-seek-next { background-position: -32px -160px; }
+.ui-icon-seek-prev { background-position: -48px -160px; }
+.ui-icon-seek-end { background-position: -64px -160px; }
+.ui-icon-seek-start { background-position: -80px -160px; }
+/* ui-icon-seek-first is deprecated, use ui-icon-seek-start instead */
+.ui-icon-seek-first { background-position: -80px -160px; }
+.ui-icon-stop { background-position: -96px -160px; }
+.ui-icon-eject { background-position: -112px -160px; }
+.ui-icon-volume-off { background-position: -128px -160px; }
+.ui-icon-volume-on { background-position: -144px -160px; }
+.ui-icon-power { background-position: 0 -176px; }
+.ui-icon-signal-diag { background-position: -16px -176px; }
+.ui-icon-signal { background-position: -32px -176px; }
+.ui-icon-battery-0 { background-position: -48px -176px; }
+.ui-icon-battery-1 { background-position: -64px -176px; }
+.ui-icon-battery-2 { background-position: -80px -176px; }
+.ui-icon-battery-3 { background-position: -96px -176px; }
+.ui-icon-circle-plus { background-position: 0 -192px; }
+.ui-icon-circle-minus { background-position: -16px -192px; }
+.ui-icon-circle-close { background-position: -32px -192px; }
+.ui-icon-circle-triangle-e { background-position: -48px -192px; }
+.ui-icon-circle-triangle-s { background-position: -64px -192px; }
+.ui-icon-circle-triangle-w { background-position: -80px -192px; }
+.ui-icon-circle-triangle-n { background-position: -96px -192px; }
+.ui-icon-circle-arrow-e { background-position: -112px -192px; }
+.ui-icon-circle-arrow-s { background-position: -128px -192px; }
+.ui-icon-circle-arrow-w { background-position: -144px -192px; }
+.ui-icon-circle-arrow-n { background-position: -160px -192px; }
+.ui-icon-circle-zoomin { background-position: -176px -192px; }
+.ui-icon-circle-zoomout { background-position: -192px -192px; }
+.ui-icon-circle-check { background-position: -208px -192px; }
+.ui-icon-circlesmall-plus { background-position: 0 -208px; }
+.ui-icon-circlesmall-minus { background-position: -16px -208px; }
+.ui-icon-circlesmall-close { background-position: -32px -208px; }
+.ui-icon-squaresmall-plus { background-position: -48px -208px; }
+.ui-icon-squaresmall-minus { background-position: -64px -208px; }
+.ui-icon-squaresmall-close { background-position: -80px -208px; }
+.ui-icon-grip-dotted-vertical { background-position: 0 -224px; }
+.ui-icon-grip-dotted-horizontal { background-position: -16px -224px; }
+.ui-icon-grip-solid-vertical { background-position: -32px -224px; }
+.ui-icon-grip-solid-horizontal { background-position: -48px -224px; }
+.ui-icon-gripsmall-diagonal-se { background-position: -64px -224px; }
+.ui-icon-grip-diagonal-se { background-position: -80px -224px; }
+
+
+/* Misc visuals
+----------------------------------*/
+
+/* Corner radius */
+.ui-corner-all,
+.ui-corner-top,
+.ui-corner-left,
+.ui-corner-tl {
+	border-top-left-radius: 4px;
+}
+.ui-corner-all,
+.ui-corner-top,
+.ui-corner-right,
+.ui-corner-tr {
+	border-top-right-radius: 4px;
+}
+.ui-corner-all,
+.ui-corner-bottom,
+.ui-corner-left,
+.ui-corner-bl {
+	border-bottom-left-radius: 4px;
+}
+.ui-corner-all,
+.ui-corner-bottom,
+.ui-corner-right,
+.ui-corner-br {
+	border-bottom-right-radius: 4px;
+}
+
+/* Overlays */
+.ui-widget-overlay {
+	background: #aaaaaa;
+	opacity: .3;
+	-ms-filter: Alpha(Opacity=30); /* support: IE8 */
+}
+.ui-widget-shadow {
+	-webkit-box-shadow: -8px -8px 8px #aaaaaa;
+	box-shadow: -8px -8px 8px #aaaaaa;
+}
diff --git a/test/themeroller.js b/test/themeroller.js
index d17dbcd..b1d5dfa 100644
--- a/test/themeroller.js
+++ b/test/themeroller.js
@@ -9,32 +9,36 @@ const dirname = path.dirname( fileURLToPath( import.meta.url ) );
 describe( "ThemeRoller", function() {
 	let theme;
 
-	beforeEach( async function() {
-		const baseThemeCss = await fs.readFile( `${ dirname }/fixtures/jquery-ui-1.12/base/theme.css`, "utf-8" );
-		const varsString = await fs.readFile( `${ dirname }/fixtures/vars/base.json`, "utf-8" );
-		const vars = JSON.parse( varsString );
-
-		theme = new ThemeRoller( baseThemeCss, vars );
-	} );
+	[ "1.12.1", "1.13.2" ].forEach( ( jQueryUiVersion ) => {
+		describe( `with jQuery UI ${ jQueryUiVersion }`, function() {
+			beforeEach( async function() {
+				const baseThemeCss = await fs.readFile( `${ dirname }/fixtures/jquery-ui-${ jQueryUiVersion }/base/theme.css`, "utf-8" );
+				const varsString = await fs.readFile( `${ dirname }/fixtures/vars/smoothness.json`, "utf-8" );
+				const vars = JSON.parse( varsString );
+
+				theme = new ThemeRoller( baseThemeCss, vars, { version: jQueryUiVersion } );
+			} );
 
-	it( "should instantiate", async function() {
-		expect( theme ).to.be.an.instanceof( ThemeRoller );
-	} );
+			it( "should instantiate", async function() {
+				expect( theme ).to.be.an.instanceof( ThemeRoller );
+			} );
 
-	it( "should generate the theme CSS", async function() {
-		const baseCssFixture = await fs.readFile( dirname + "/fixtures/jquery-ui-1.12/themes/base.css", "utf-8" );
-		expect( theme.css() ).to.equal( baseCssFixture );
-	} );
+			it( "should generate the theme CSS", async function() {
+				const smoothnessCssFixture = await fs.readFile( `${ dirname }/fixtures/jquery-ui-${ jQueryUiVersion }/themes/smoothness.css`, "utf-8" );
+				expect( theme.css() ).to.equal( smoothnessCssFixture );
+			} );
 
-	it( "should generate images", async function() {
-		return new Promise( ( resolve ) => {
-			theme.generateImages( function( error, images ) {
-				try {
-					expect( error ).to.be.null;
-					expect( images ).to.be.an( "object" );
-				} finally {
-					resolve();
-				}
+			it( "should generate images", async function() {
+				return new Promise( ( resolve ) => {
+					theme.generateImages( function( error, images ) {
+						try {
+							expect( error ).to.be.null;
+							expect( images ).to.be.an( "object" );
+						} finally {
+							resolve();
+						}
+					} );
+				} );
 			} );
 		} );
 	} );