diff --git a/js/tests/unit/collapse.js b/js/tests/unit/collapse.js
index 976bdcd7bf..8e6bb82736 100644
--- a/js/tests/unit/collapse.js
+++ b/js/tests/unit/collapse.js
@@ -33,14 +33,14 @@ $(function () {
     var $el = $('<div class="collapse"/>').bootstrapCollapse('show')
 
     ok($el.hasClass('in'), 'has class "in"')
-    ok(!/height/.test($el.attr('style')), 'has height reset')
+    ok(!/height/i.test($el.attr('style')), 'has height reset')
   })
 
   test('should hide a collapsed element', function () {
     var $el = $('<div class="collapse"/>').bootstrapCollapse('hide')
 
     ok(!$el.hasClass('in'), 'does not have class "in"')
-    ok(/height/.test($el.attr('style')), 'has height set')
+    ok(/height/i.test($el.attr('style')), 'has height set')
   })
 
   test('should not fire shown when show is prevented', function () {
diff --git a/js/tests/unit/tooltip.js b/js/tests/unit/tooltip.js
index 4cecf9348e..6871f538e3 100644
--- a/js/tests/unit/tooltip.js
+++ b/js/tests/unit/tooltip.js
@@ -470,7 +470,7 @@ $(function () {
         + '.tooltip.right { white-space: nowrap; }'
         + '.tooltip.right .tooltip-inner { max-width: none; }'
         + '</style>'
-    var $styles = $(styles).appendTo(document.head)
+    var $styles = $(styles).appendTo('head')
 
     var $container = $('<div/>').appendTo(document.body)
     var $target = $('<a href="#" rel="tooltip" title="very very very very very very very very long tooltip in one line"/>')
@@ -585,7 +585,7 @@ $(function () {
         + '.tooltip .tooltip-inner { width: 200px; height: 200px; max-width: none; }'
         + 'a[rel="tooltip"] { position: fixed; }'
         + '</style>'
-    var $styles = $(styles).appendTo(document.head)
+    var $styles = $(styles).appendTo('head')
 
     var $container = $('<div/>').appendTo(document.body)
     var $target = $('<a href="#" rel="tooltip" title="tip" style="top: 0px; left: 0px;"/>')
@@ -613,7 +613,7 @@ $(function () {
         + '.tooltip .tooltip-inner { width: 200px; height: 200px; max-width: none; }'
         + 'a[rel="tooltip"] { position: fixed; }'
         + '</style>'
-    var $styles = $(styles).appendTo(document.head)
+    var $styles = $(styles).appendTo('head')
 
     var $container = $('<div/>').appendTo(document.body)
     var $target = $('<a href="#" rel="tooltip" title="tip" style="bottom: 0px; left: 0px;"/>')
@@ -642,7 +642,7 @@ $(function () {
         + '.tooltip .tooltip-inner { width: 200px; height: 200px; max-width: none; }'
         + 'a[rel="tooltip"] { position: fixed; }'
         + '</style>'
-    var $styles = $(styles).appendTo(document.head)
+    var $styles = $(styles).appendTo('head')
 
     var $container = $('<div/>').appendTo(document.body)
     var $target = $('<a href="#" rel="tooltip" title="tip" style="top: 0px; left: 0px;"/>')
@@ -670,7 +670,7 @@ $(function () {
         + '.tooltip .tooltip-inner { width: 200px; height: 200px; max-width: none; }'
         + 'a[rel="tooltip"] { position: fixed; }'
         + '</style>'
-    var $styles = $(styles).appendTo(document.head)
+    var $styles = $(styles).appendTo('head')
 
     var $container = $('<div/>').appendTo('body')
     var $target = $('<a href="#" rel="tooltip" title="tip" style="top: 0px; right: 0px;"/>')
@@ -700,7 +700,7 @@ $(function () {
         + '.container-viewport { position: absolute; top: 50px; left: 60px; width: 300px; height: 300px; }'
         + 'a[rel="tooltip"] { position: fixed; }'
         + '</style>'
-    var $styles = $(styles).appendTo(document.head)
+    var $styles = $(styles).appendTo('head')
 
     var $container = $('<div class="container-viewport"/>').appendTo(document.body)
     var $target = $('<a href="#" rel="tooltip" title="tip" style="top: 50px; left: 350px;"/>')
diff --git a/js/tooltip.js b/js/tooltip.js
index b305bc5ab5..0c3a79d0b9 100644
--- a/js/tooltip.js
+++ b/js/tooltip.js
@@ -321,7 +321,7 @@
     var isBody = el.tagName == 'BODY'
     var isSvg  = window.SVGElement && el instanceof window.SVGElement
 
-    var elRect    = typeof el.getBoundingClientRect == 'function' ? el.getBoundingClientRect() : null
+    var elRect    = el.getBoundingClientRect ? el.getBoundingClientRect() : null
     var elOffset  = isBody ? { top: 0, left: 0 } : $element.offset()
     var scroll    = { scroll: isBody ? document.documentElement.scrollTop || document.body.scrollTop : $element.scrollTop() }
     var outerDims = isSvg ? {} : {