diff --git a/src/css.js b/src/css.js
index 59eaed71c3..661d800d70 100644
--- a/src/css.js
+++ b/src/css.js
@@ -97,7 +97,7 @@ jQuery.extend({
 			if ( type === "string" && rrelNum.test( value ) ) {
 				value = +value.replace( rrelNumFilter, "" ) + parseFloat( jQuery.css( elem, name ) );
 				// Fixes bug #9237
-				type = 'number';
+				type = "number";
 			}
 
 			// If a number was passed in, add 'px' to the (except for certain CSS properties)
diff --git a/test/unit/css.js b/test/unit/css.js
index 67271c876d..e631f49625 100644
--- a/test/unit/css.js
+++ b/test/unit/css.js
@@ -112,10 +112,10 @@ test("css() explicit and relative values", function() {
 	expect(27);
 	var $elem = jQuery("#nothiddendiv");
 
-	$elem.css({ width: 1, height: 1, paddingLeft: '1px', opacity: 1 });
+	$elem.css({ width: 1, height: 1, paddingLeft: "1px", opacity: 1 });
 	equals( $elem.width(), 1, "Initial css set or width/height works (hash)" );
-	equals( $elem.css("paddingLeft"), '1px', "Initial css set of paddingLeft works (hash)" );
-	equals( $elem.css("opacity"), '1', "Initial css set of opacity works (hash)" );
+	equals( $elem.css("paddingLeft"), "1px", "Initial css set of paddingLeft works (hash)" );
+	equals( $elem.css("opacity"), "1", "Initial css set of opacity works (hash)" );
 
 	$elem.css({ width: "+=9" });
 	equals( $elem.width(), 10, "'+=9' on width (hash)" );
@@ -142,52 +142,52 @@ test("css() explicit and relative values", function() {
 	equals( $elem.width(), 1, "'-=9px' on width (params)" );
 
 	$elem.css({ paddingLeft: "+=4" });
-	equals( $elem.css("paddingLeft"), '5px', "'+=4' on paddingLeft (hash)" );
+	equals( $elem.css("paddingLeft"), "5px", "'+=4' on paddingLeft (hash)" );
 
 	$elem.css({ paddingLeft: "-=4" });
-	equals( $elem.css("paddingLeft"), '1px', "'-=4' on paddingLeft (hash)" );
+	equals( $elem.css("paddingLeft"), "1px", "'-=4' on paddingLeft (hash)" );
 
 	$elem.css({ paddingLeft: "+=4px" });
-	equals( $elem.css("paddingLeft"), '5px', "'+=4px' on paddingLeft (hash)" );
+	equals( $elem.css("paddingLeft"), "5px", "'+=4px' on paddingLeft (hash)" );
 
 	$elem.css({ paddingLeft: "-=4px" });
-	equals( $elem.css("paddingLeft"), '1px', "'-=4px' on paddingLeft (hash)" );
+	equals( $elem.css("paddingLeft"), "1px", "'-=4px' on paddingLeft (hash)" );
 
 	$elem.css({ "padding-left": "+=4" });
-	equals( $elem.css("paddingLeft"), '5px', "'+=4' on padding-left (hash)" );
+	equals( $elem.css("paddingLeft"), "5px", "'+=4' on padding-left (hash)" );
 
 	$elem.css({ "padding-left": "-=4" });
-	equals( $elem.css("paddingLeft"), '1px', "'-=4' on padding-left (hash)" );
+	equals( $elem.css("paddingLeft"), "1px", "'-=4' on padding-left (hash)" );
 
 	$elem.css({ "padding-left": "+=4px" });
-	equals( $elem.css("paddingLeft"), '5px', "'+=4px' on padding-left (hash)" );
+	equals( $elem.css("paddingLeft"), "5px", "'+=4px' on padding-left (hash)" );
 
 	$elem.css({ "padding-left": "-=4px" });
-	equals( $elem.css("paddingLeft"), '1px', "'-=4px' on padding-left (hash)" );
+	equals( $elem.css("paddingLeft"), "1px", "'-=4px' on padding-left (hash)" );
 
 	$elem.css( "paddingLeft", "+=4" );
-	equals( $elem.css("paddingLeft"), '5px', "'+=4' on paddingLeft (params)" );
+	equals( $elem.css("paddingLeft"), "5px", "'+=4' on paddingLeft (params)" );
 
 	$elem.css( "paddingLeft", "-=4" );
-	equals( $elem.css("paddingLeft"), '1px', "'-=4' on paddingLeft (params)" );
+	equals( $elem.css("paddingLeft"), "1px", "'-=4' on paddingLeft (params)" );
 
 	$elem.css( "padding-left", "+=4px" );
-	equals( $elem.css("paddingLeft"), '5px', "'+=4px' on padding-left (params)" );
+	equals( $elem.css("paddingLeft"), "5px", "'+=4px' on padding-left (params)" );
 
 	$elem.css( "padding-left", "-=4px" );
-	equals( $elem.css("paddingLeft"), '1px', "'-=4px' on padding-left (params)" );
+	equals( $elem.css("paddingLeft"), "1px", "'-=4px' on padding-left (params)" );
 
 	$elem.css({ opacity: "-=0.5" });
-	equals( $elem.css("opacity"), '0.5', "'-=0.5' on opacity (hash)" );
+	equals( $elem.css("opacity"), "0.5", "'-=0.5' on opacity (hash)" );
 
 	$elem.css({ opacity: "+=0.5" });
-	equals( $elem.css("opacity"), '1', "'+=0.5' on opacity (hash)" );
+	equals( $elem.css("opacity"), "1", "'+=0.5' on opacity (hash)" );
 
 	$elem.css( "opacity", "-=0.5" );
-	equals( $elem.css("opacity"), '0.5', "'-=0.5' on opacity (params)" );
+	equals( $elem.css("opacity"), "0.5", "'-=0.5' on opacity (params)" );
 
 	$elem.css( "opacity", "+=0.5" );
-	equals( $elem.css("opacity"), '1', "'+=0.5' on opacity (params)" );
+	equals( $elem.css("opacity"), "1", "'+=0.5' on opacity (params)" );
 });
 
 test("css(String, Object)", function() {