diff --git a/chrome/content/zotero/xpcom/attachments.js b/chrome/content/zotero/xpcom/attachments.js
index 6021cd272..2c172bd97 100644
--- a/chrome/content/zotero/xpcom/attachments.js
+++ b/chrome/content/zotero/xpcom/attachments.js
@@ -1327,7 +1327,7 @@ Zotero.Attachments = new function(){
 	 *
 	 * @return {Promise}
 	 */
-	function _postProcessFile(itemID, file, contentType){
+	var _postProcessFile = Zotero.Promise.coroutine(function* (itemID, file, contentType) {
 		// Don't try to process if MIME type is unknown
 		if (!contentType) {
 			return;
@@ -1387,7 +1387,7 @@ Zotero.Attachments = new function(){
 		browser.loadURI(url);
 		
 		return deferred.promise;
-	}
+	});
 	
 	/**
 	 * Determines if a given document is an instance of PDFJS
diff --git a/test/tests/attachmentsTest.js b/test/tests/attachmentsTest.js
new file mode 100644
index 000000000..b346b6d94
--- /dev/null
+++ b/test/tests/attachmentsTest.js
@@ -0,0 +1,58 @@
+describe("Zotero.Attachments", function() {
+	var win;
+	
+	before(function () {
+		// Hidden browser, which requires a browser window, needed for charset detection
+		// (until we figure out a better way)
+		if (!Zotero.isStandalone) {
+			return loadBrowserWindow().then(window => win = window);
+		}
+	});
+	after(function () {
+		if (win) {
+			win.close();
+		}
+	});
+	
+	describe("#importFromFile()", function () {
+		it("should create a child attachment from a text file", function* () {
+			// Create test file
+			var contents = "Test";
+			var tmpFile = Zotero.getTempDirectory();
+			tmpFile.append('test.txt');
+			yield Zotero.File.putContentsAsync(tmpFile, contents);
+			
+			// Create parent item
+			var item = new Zotero.Item('book');
+			var parentItemID = yield item.save();
+			
+			// Create attachment and compare content
+			var itemID = yield Zotero.Attachments.importFromFile(tmpFile, parentItemID);
+			var item = yield Zotero.Items.getAsync(itemID);
+			var storedFile = item.getFile();
+			assert.equal((yield Zotero.File.getContentsAsync(storedFile)), contents);
+			
+			// Clean up
+			yield Zotero.Items.erase(itemID);
+		});
+		
+		it("should create a child attachment from a PNG file", function* () {
+			var file = getTestDataDirectory();
+			file.append('test.png');
+			var contents = yield Zotero.File.getBinaryContentsAsync(file);
+			
+			// Create parent item
+			var item = new Zotero.Item('book');
+			var parentItemID = yield item.save();
+			
+			// Create attachment and compare content
+			var itemID = yield Zotero.Attachments.importFromFile(file, parentItemID);
+			var item = yield Zotero.Items.getAsync(itemID);
+			var storedFile = item.getFile();
+			assert.equal((yield Zotero.File.getBinaryContentsAsync(storedFile)), contents);
+			
+			// Clean up
+			yield Zotero.Items.erase(itemID);
+		});
+	})
+})