diff --git a/chrome/content/zotero/xpcom/sync/syncLocal.js b/chrome/content/zotero/xpcom/sync/syncLocal.js
index d207cb370..2166fec24 100644
--- a/chrome/content/zotero/xpcom/sync/syncLocal.js
+++ b/chrome/content/zotero/xpcom/sync/syncLocal.js
@@ -911,6 +911,17 @@ Zotero.Sync.Data.Local = {
 					}
 				}
 			}
+			else {
+				Zotero.debug("Conflict resolution was cancelled", 2);
+				for (let conflict of conflicts) {
+					results.push({
+						// Use key from either, in case one side is deleted
+						key: conflict.left.key || conflict.right.key,
+						processed: false,
+						retry: false
+					});
+				}
+			}
 		}
 		
 		let processed = 0;
diff --git a/test/tests/syncEngineTest.js b/test/tests/syncEngineTest.js
index f5c724049..ec0f54ab9 100644
--- a/test/tests/syncEngineTest.js
+++ b/test/tests/syncEngineTest.js
@@ -1359,6 +1359,105 @@ describe("Zotero.Sync.Data.Engine", function () {
 			assert.isFalse(Zotero.Items.exists(itemID1));
 			assert.isTrue(Zotero.Items.exists(itemID2));
 		})
+		
+		it("should handle cancellation of conflict resolution window", function* () {
+			var userLibraryID = Zotero.Libraries.userLibraryID;
+			yield Zotero.Libraries.setVersion(userLibraryID, 5);
+			({ engine, client, caller } = yield setup());
+			
+			var item = yield createDataObject('item');
+			var itemID = yield item.saveTx();
+			var itemKey = item.key;
+			
+			var headers = {
+				"Last-Modified-Version": 6
+			};
+			setResponse({
+				method: "GET",
+				url: "users/1/settings?since=5",
+				status: 200,
+				headers: headers,
+				json: {}
+			});
+			setResponse({
+				method: "GET",
+				url: "users/1/collections?format=versions&since=5",
+				status: 200,
+				headers: headers,
+				json: {}
+			});
+			setResponse({
+				method: "GET",
+				url: "users/1/searches?format=versions&since=5",
+				status: 200,
+				headers: headers,
+				json: {}
+			});
+			setResponse({
+				method: "GET",
+				url: "users/1/items/top?format=versions&since=5&includeTrashed=1",
+				status: 200,
+				headers: headers,
+				json: {
+					AAAAAAAA: 6,
+					[itemKey]: 6
+				}
+			});
+			setResponse({
+				method: "GET",
+				url: `users/1/items?format=json&itemKey=AAAAAAAA%2C${itemKey}&includeTrashed=1`,
+				status: 200,
+				headers: headers,
+				json: [
+					makeItemJSON({
+						key: "AAAAAAAA",
+						version: 6,
+						itemType: "book",
+						title: "B"
+					}),
+					makeItemJSON({
+						key: itemKey,
+						version: 6,
+						itemType: "book",
+						title: "B"
+					})
+				]
+			});
+			setResponse({
+				method: "GET",
+				url: "users/1/items?format=versions&since=5&includeTrashed=1",
+				status: 200,
+				headers: headers,
+				json: {}
+			});
+			setResponse({
+				method: "GET",
+				url: "users/1/deleted?since=5",
+				status: 200,
+				headers: headers,
+				json: {
+					settings: [],
+					collections: [],
+					searches: [],
+					items: []
+				}
+			});
+			
+			waitForWindow('chrome://zotero/content/merge.xul', function (dialog) {
+				var doc = dialog.document;
+				var wizard = doc.documentElement;
+				wizard.getButton('cancel').click();
+			})
+			yield engine._startDownload();
+			
+			// Non-conflicted item should be saved
+			assert.ok(Zotero.Items.getIDFromLibraryAndKey(userLibraryID, "AAAAAAAA"));
+			
+			// Conflicted item should be skipped and in queue
+			assert.isFalse(Zotero.Items.exists(itemID));
+			var keys = yield Zotero.Sync.Data.Local.getObjectsFromSyncQueue('item', userLibraryID);
+			assert.sameMembers(keys, [itemKey]);
+		});
 	})
 	
 	describe("#_upgradeCheck()", function () {
diff --git a/test/tests/syncLocalTest.js b/test/tests/syncLocalTest.js
index 378f9995a..5a5cdda82 100644
--- a/test/tests/syncLocalTest.js
+++ b/test/tests/syncLocalTest.js
@@ -854,7 +854,7 @@ describe("Zotero.Sync.Data.Local", function() {
 			json.data.note = noteText2;
 			downloadedJSON.push(json);
 			
-			// Delete object locally
+			// Modify local version
 			obj.setNote(noteText1);
 			
 			waitForWindow('chrome://zotero/content/merge.xul', function (dialog) {