diff --git a/chrome/content/zotero/xpcom/sync/syncEventListeners.js b/chrome/content/zotero/xpcom/sync/syncEventListeners.js
index f6a7d6846..28e69ad8d 100644
--- a/chrome/content/zotero/xpcom/sync/syncEventListeners.js
+++ b/chrome/content/zotero/xpcom/sync/syncEventListeners.js
@@ -126,27 +126,25 @@ Zotero.Sync.EventListeners.AutoSyncListener = {
 		// Only trigger sync for certain types
 		//
 		// TODO: settings, full text
-		if (Zotero.DataObjectUtilities.getTypes().indexOf(type) == -1) {
+		if (!Zotero.DataObjectUtilities.getTypes().includes(type)) {
 			return;
 		}
 		
 		// Determine affected libraries so only those can be synced
-		let libraryIDs = new Set();
-		if (Zotero.DataObjectUtilities.getTypes().indexOf(type) != -1) {
-			let objectsClass = Zotero.DataObjectUtilities.getObjectsClassForObjectType(type);
-			ids.forEach(id => {
-				let lk = objectsClass.getLibraryAndKeyFromID(id);
-				if (lk && Zotero.Libraries.get(lk.libraryID).syncable) {
-					libraryIDs.add(lk.libraryID);
+		let libraries = [];
+		let objectsClass = Zotero.DataObjectUtilities.getObjectsClassForObjectType(type);
+		ids.forEach(id => {
+			let lk = objectsClass.getLibraryAndKeyFromID(id);
+			if (lk) {
+				let library = Zotero.Libraries.get(lk.libraryID);
+				if (library.syncable) {
+					libraries.push(library);
 				}
-			});
-		}
+			}
+		});
 		
-		// Don't include skipped libraries
-		var skipped = new Set(Zotero.Sync.Data.Local.getSkippedLibraries());
-		libraryIDs = Array.from(libraryIDs.values()).filter(id => !skipped.has(id));
-		
-		if (!libraryIDs.length) {
+		libraries = Zotero.Sync.Data.Local.filterSkippedLibraries(libraries);
+		if (!libraries.length) {
 			return;
 		}
 		
@@ -154,7 +152,7 @@ Zotero.Sync.EventListeners.AutoSyncListener = {
 			this._editTimeout,
 			false,
 			{
-				libraries: libraryIDs
+				libraries: libraries.map(library => library.libraryID)
 			}
 		);
 	},
diff --git a/chrome/content/zotero/xpcom/sync/syncLocal.js b/chrome/content/zotero/xpcom/sync/syncLocal.js
index becd3a83a..130bebb04 100644
--- a/chrome/content/zotero/xpcom/sync/syncLocal.js
+++ b/chrome/content/zotero/xpcom/sync/syncLocal.js
@@ -332,6 +332,24 @@ Zotero.Sync.Data.Local = {
 	},
 	
 	
+	/**
+	 * @param {Zotero.Library[]} libraries
+	 * @return {Zotero.Library[]}
+	 */
+	filterSkippedLibraries: function (libraries) {
+		var skippedLibraries = this.getSkippedLibraries();
+		var skippedGroups = this.getSkippedGroups();
+		
+		return libraries.filter((library) => {
+			var libraryType = library.libraryType;
+			if (libraryType == 'group') {
+				return !skippedGroups.includes(library.groupID);
+			}
+			return !skippedLibraries.includes(library.libraryID);
+		});
+	},
+	
+	
 	/**
 	 * @return {nsILoginInfo|false}
 	 */
diff --git a/test/tests/syncEventListenersTest.js b/test/tests/syncEventListenersTest.js
index 02f207597..867dfb503 100644
--- a/test/tests/syncEventListenersTest.js
+++ b/test/tests/syncEventListenersTest.js
@@ -38,7 +38,7 @@ describe("Zotero.Sync.EventListeners", function () {
 			var expectation = mock.expects("setSyncTimeout").never();
 			
 			var group = yield createGroup();
-			Zotero.Prefs.set('sync.librariesToSkip', JSON.stringify(["L" + group.libraryID]));
+			Zotero.Prefs.set('sync.librariesToSkip', JSON.stringify(["G" + group.groupID]));
 			yield createDataObject('item', { libraryID: group.libraryID });
 			
 			yield Zotero.Promise.delay(10);