diff --git a/chrome/content/zotero/xpcom/data/feeds.js b/chrome/content/zotero/xpcom/data/feeds.js
index a337f42be..d79996aa6 100644
--- a/chrome/content/zotero/xpcom/data/feeds.js
+++ b/chrome/content/zotero/xpcom/data/feeds.js
@@ -23,12 +23,17 @@
     ***** END LICENSE BLOCK *****
 */
 
+"use strict";
+
 // Mimics Zotero.Libraries
 Zotero.Feeds = new function() {
+	var _initTimeoutID;
+	var _initPromise;
+	
 	this.init = function () {
-		this._timeoutID = setTimeout(() => {
-			this.scheduleNextFeedCheck();
-			this._timeoutID = null;
+		_initTimeoutID = setTimeout(() => {
+			_initTimeoutID = null;
+			_initPromise = this.scheduleNextFeedCheck().then(() => _initPromise = null);
 		}, 5000);
 		
 		Zotero.SyncedSettings.onSyncDownload.addListener(Zotero.Libraries.userLibraryID, 'feeds', 
@@ -45,9 +50,14 @@ Zotero.Feeds = new function() {
 	};
 	
 	this.uninit = function () {
-		if (this._timeoutID) {
-			clearTimeout(this._timeoutID);
-			this._timeoutID = null
+		// Cancel feed check if not yet run
+		if (_initTimeoutID) {
+			clearTimeout(_initTimeoutID);
+			_initTimeoutID = null
+		}
+		// Cancel feed check if in progress
+		if (_initPromise) {
+			_initPromise.cancel();
 		}
 	};
 	
diff --git a/chrome/content/zotero/xpcom/quickCopy.js b/chrome/content/zotero/xpcom/quickCopy.js
index 6862c2402..934b2970c 100644
--- a/chrome/content/zotero/xpcom/quickCopy.js
+++ b/chrome/content/zotero/xpcom/quickCopy.js
@@ -23,18 +23,25 @@
     ***** END LICENSE BLOCK *****
 */
 
+"use strict";
 
 Zotero.QuickCopy = new function() {
+	var _initTimeoutID
+	var _initPromise;
+	var _initialized = false;
 	var _siteSettings;
 	var _formattedNames;
-	var _initialized = false;
 	
 	this.init = Zotero.Promise.coroutine(function* () {
 		yield this.loadSiteSettings();
 		
 		// Load code for selected export translator ahead of time
 		// (in the background, because it requires translator initialization)
-		setTimeout(_loadOutputFormat, 5000);
+		_initTimeoutID = setTimeout(() => {
+			_initTimeoutID = null;
+			_initPromise = _loadOutputFormat().then(() => _initPromise = null);
+		}, 5000);
+		
 		if (!_initialized) {
 			Zotero.Prefs.registerObserver("export.quickCopy.setting", () => _loadOutputFormat());
 			_initialized = true;
@@ -42,6 +49,19 @@ Zotero.QuickCopy = new function() {
 	});
 	
 	
+	this.uninit = function () {
+		// Cancel load if not yet done
+		if (_initTimeoutID) {
+			clearTimeout(_initTimeoutID);
+			_initTimeoutID = null
+		}
+		// Cancel load if in progress
+		if (_initPromise) {
+			_initPromise.cancel();
+		}
+	};
+	
+	
 	this.loadSiteSettings = Zotero.Promise.coroutine(function* () {
 		var sql = "SELECT key AS domainPath, value AS format FROM settings "
 			+ "WHERE setting='quickCopySite'";
diff --git a/chrome/content/zotero/xpcom/zotero.js b/chrome/content/zotero/xpcom/zotero.js
index 48521b3e2..ba00b601d 100644
--- a/chrome/content/zotero/xpcom/zotero.js
+++ b/chrome/content/zotero/xpcom/zotero.js
@@ -633,8 +633,6 @@ Components.utils.import("resource://gre/modules/osfile.jsm");
 						yield Zotero.Searches.loadAll(library.libraryID);
 					})()
 				);
-				
-				yield Zotero.QuickCopy.init();
 			}
 			catch (e) {
 				Zotero.logError(e);
@@ -735,6 +733,10 @@ Components.utils.import("resource://gre/modules/osfile.jsm");
 			};
 			
 			Zotero.Items.startEmptyTrashTimer();
+			
+			yield Zotero.QuickCopy.init();
+			Zotero.addShutdownListener(() => Zotero.QuickCopy.uninit());
+			
 			Zotero.Feeds.init();
 			Zotero.addShutdownListener(() => Zotero.Feeds.uninit());
 			
diff --git a/test/tests/quickCopyTest.js b/test/tests/quickCopyTest.js
index 62cd19e49..63365892c 100644
--- a/test/tests/quickCopyTest.js
+++ b/test/tests/quickCopyTest.js
@@ -40,10 +40,16 @@ describe("Zotero.QuickCopy", function() {
 			var content = "";
 			var worked = false;
 			
-			var format = 'export=9cb70025-a888-4a29-a210-93ec52da40d4'; // BibTeX
+			yield Zotero.Translators.init();
+			
+			var translatorID = '9cb70025-a888-4a29-a210-93ec52da40d4'; // BibTeX
+			var format = 'export=' + translatorID;
 			Zotero.Prefs.set('export.quickCopy.setting', format);
-			// The translator code is loaded automatically on pref change, but let's not wait for it
-			yield Zotero.QuickCopy.init();
+			// Translator code for selected format is loaded automatically, so wait for it
+			var translator = Zotero.Translators.get(translatorID);
+			while (!translator.code) {
+				yield Zotero.Promise.delay(50);
+			}
 			
 			Zotero.QuickCopy.getContentFromItems(
 				[item],