diff --git a/test/data/testinit.js b/test/data/testinit.js
index f7d8f2c0c..2a3c33d76 100644
--- a/test/data/testinit.js
+++ b/test/data/testinit.js
@@ -291,7 +291,7 @@ this.loadTests = function() {
 			require( [ dep ], loadDep );
 		} else {
 			// Subproject tests must be last because they replace our test fixture
-			testSubproject( "Sizzle", "../bower_components/sizzle/test/", /^unit\/.*\.js$/, function() {
+			window.testSubproject( "Sizzle", "../bower_components/sizzle/test/", /^unit\/.*\.js$/, function() {
 				// Call load to build module filter select element
 				QUnit.load();