diff --git a/chrome/content/zotero/tools/testTranslators/translatorTester.js b/chrome/content/zotero/tools/testTranslators/translatorTester.js
index 6c51704c1..502042156 100644
--- a/chrome/content/zotero/tools/testTranslators/translatorTester.js
+++ b/chrome/content/zotero/tools/testTranslators/translatorTester.js
@@ -142,6 +142,7 @@ Zotero_TranslatorTesters = new function() {
 Zotero_TranslatorTester = function(translator, type, debugCallback) {
 	this.type = type;
 	this.translator = translator;
+	this.translator.runMode = Zotero.Translator.RUN_MODE_IN_BROWSER;
 	this.output = "";
 	this.isSupported = this.translator.runMode === Zotero.Translator.RUN_MODE_IN_BROWSER;