diff --git a/chrome/content/zotero/tools/testTranslators/translatorTester.js b/chrome/content/zotero/tools/testTranslators/translatorTester.js
index c061659e67..9eeabb8aaa 100644
--- a/chrome/content/zotero/tools/testTranslators/translatorTester.js
+++ b/chrome/content/zotero/tools/testTranslators/translatorTester.js
@@ -337,6 +337,9 @@ Zotero_TranslatorTester.prototype.fetchPageAndRunTest = function(test, testDoneC
 		},
 		true
 	);
+	(Zotero.setTimeout ? Zotero : window).setTimeout(function() {
+		Zotero.Browser.deleteHiddenBrowser(hiddenBrowser);
+	}, TEST_RUN_TIMEOUT);
 };
 
 /**