diff --git a/test/data/testinit.js b/test/data/testinit.js
index dd06f86be..c55ebd1bb 100644
--- a/test/data/testinit.js
+++ b/test/data/testinit.js
@@ -233,8 +233,10 @@ this.ajaxTest = function( title, expect, options ) {
 
 this.testIframe = function( title, fileName, func ) {
 	QUnit.test( title, function( assert ) {
-		var iframe;
-		var done = assert.async();
+		var done = assert.async(),
+			$iframe = supportjQuery( "<iframe/>" )
+				.css( { position: "absolute", width: "500px", left: "-600px" } )
+				.attr( { id: "qunit-fixture-iframe", src: url( "./data/" + fileName ) } );
 
 		// Test iframes are expected to invoke this via startIframeTest (cf. iframeTest.js)
 		window.iframeCallback = function() {
@@ -247,13 +249,14 @@ this.testIframe = function( title, fileName, func ) {
 
 				func.apply( this, args );
 				func = function() {};
-				iframe.remove();
+				$iframe.remove();
 				done();
 			} );
 		};
-		iframe = jQuery( "<div/>" ).css( { position: "absolute", width: "500px", left: "-600px" } )
-			.append( jQuery( "<iframe/>" ).attr( "src", url( "./data/" + fileName ) ) )
-			.appendTo( "#qunit-fixture" );
+
+		// Attach iframe to the body for visibility-dependent code
+		// It will be removed by either the above code, or the testDone callback in testrunner.js
+		$iframe.appendTo( document.body );
 	} );
 };
 this.iframeCallback = undefined;
diff --git a/test/data/testrunner.js b/test/data/testrunner.js
index 0784ae0a8..b8f1127ab 100644
--- a/test/data/testrunner.js
+++ b/test/data/testrunner.js
@@ -167,6 +167,9 @@ QUnit.testDone( function() {
 	// ...even if the jQuery under test has a broken .empty()
 	supportjQuery( "#qunit-fixture" ).empty();
 
+	// Remove the iframe fixture
+	supportjQuery( "#qunit-fixture-iframe" ).remove();
+
 	// Reset internal jQuery state
 	jQuery.event.global = {};
 	if ( ajaxSettings ) {