diff --git a/gratipay/testing/browser.py b/gratipay/testing/browser.py
index ae4da4c434..fbcab08803 100644
--- a/gratipay/testing/browser.py
+++ b/gratipay/testing/browser.py
@@ -113,27 +113,34 @@ def wait_for(self, selector, timeout=2):
                     return element
         raise NeverShowedUp(selector)
 
-    def wait_for_notification(self, type='notice'):
-        """Wait for a certain ``type`` of notification. Dismiss the
-        notification and return the message.
+    def wait_for_notification(self, type='notice', message=None, timeout=2):
+        """Wait for a certain ``type`` of notification, with a certain message
+        (if specified). Dismiss the notification and return the message.
         """
         notification_selector = '.notifications-fixed .notification-{}'.format(type)
         close_button_selector = 'span.btn-close'
-        notification = self.wait_for(notification_selector).first
-        message = notification.find_by_css('div').html
+        end_time = time.time() + timeout
+        while time.time() < end_time:
+            notification = self.wait_for(notification_selector, timeout).first
+            candidate = notification.find_by_css('div').html
+            if message is None or message == candidate:
+                message = candidate
+                break
         notification.find_by_css(close_button_selector).first.click()
         self.wait_to_disappear('#{} {}'.format(notification['id'], close_button_selector))
         return message
 
-    def wait_for_success(self):
-        """Wait for a success notification. Dismiss it and return the message.
+    def wait_for_success(self, message=None):
+        """Wait for a success notification, with a certain message (if
+        specified). Dismiss it and return the message.
         """
-        return self.wait_for_notification('success')
+        return self.wait_for_notification('success', message)
 
-    def wait_for_error(self):
-        """Wait for an error notification. Dismiss it and return the message.
+    def wait_for_error(self, message=None):
+        """Wait for an error notification, with a certain message (if
+        specified). Dismiss it and return the message.
         """
-        return self.wait_for_notification('error')
+        return self.wait_for_notification('error', message)
 
     def __getattr__(self, name):
         try:
diff --git a/js/gratipay/packages.js b/js/gratipay/packages.js
index 938ddc9cd1..cb47b88453 100644
--- a/js/gratipay/packages.js
+++ b/js/gratipay/packages.js
@@ -12,17 +12,14 @@ Gratipay.packages.initSingle = function() {
 
 Gratipay.packages.postBulk = function(e) {
     e.preventDefault();
-    var pkg, email, package_id, emails=[], package_ids_by_email={};
+    var pkg, email, package_id, package_ids_by_email={};
     $('table.listing td.item ').not('.disabled').each(function() {
         pkg = $(this).data();
-        if (package_ids_by_email[pkg.email] === undefined) {
-            emails.push(pkg.email);
+        if (package_ids_by_email[pkg.email] === undefined)
             package_ids_by_email[pkg.email] = [];
-        }
         package_ids_by_email[pkg.email].push(pkg.packageId);
     });
-    emails.sort();
-    for (var i=0, email; email = emails[i]; i++)
+    for (email in package_ids_by_email)
         Gratipay.packages.post(email, package_ids_by_email[email], true);
 };
 
@@ -36,7 +33,7 @@ Gratipay.packages.postOne = function(e) {
 
 Gratipay.packages.post = function(email, package_ids, show_email) {
     var action = 'start-verification';
-    var $button = $('.important-button button')
+    var $button = $('button.apply')
 
     $button.prop('disabled', true);
     function reenable() { $button.prop('disabled', false); }
diff --git a/tests/ttw/test_package_claiming.py b/tests/ttw/test_package_claiming.py
index eb679d28ea..14501bd7a1 100644
--- a/tests/ttw/test_package_claiming.py
+++ b/tests/ttw/test_package_claiming.py
@@ -211,8 +211,8 @@ def test_sends_one_mail_per_address(self):
         self.add_and_verify_email(cat, 'bob@example.com')
         self.visit_as('cat')
         self.css('.important-button button').click()
-        assert self.wait_for_success() == 'Check bob@example.com for a verification link.'
-        assert self.wait_for_success() == 'Check cat@example.com for a verification link.'
+        assert self.wait_for_success('Check bob@example.com for a verification link.')
+        assert self.wait_for_success('Check cat@example.com for a verification link.')
 
     def test_sends_one_mail_for_multiple_packages(self):
         self.make_participant('alice', claimed_time='now', email_address='alice@example.com')