diff --git a/renderer.php b/renderer.php
index 26a3d1a..fad4694 100644
--- a/renderer.php
+++ b/renderer.php
@@ -896,7 +896,7 @@ class mod_attendance_renderer extends plugin_renderer_base {
             }
 
             if ($bulkmessagecapability) { // Create the checkbox for bulk messaging.
-                $row->cells[] = html_writer::checkbox('user'.$user->id, 'on', false);
+                $row->cells[] = html_writer::checkbox('user'.$user->id, 'on', false, '', array('class' => 'attendancesesscheckbox'));
             }
 
             $table->data[] = $row;
diff --git a/tests/behat/attendance_mod.feature b/tests/behat/attendance_mod.feature
index 8fbe1c4..9b7641a 100644
--- a/tests/behat/attendance_mod.feature
+++ b/tests/behat/attendance_mod.feature
@@ -66,7 +66,7 @@ Feature: Teachers and Students can record session attendance
         And I click on "id_submitbutton" "button"
         And I follow "Report"
         And I follow "Low grade"
-        And I set the field "user3" to "1"
+        And I set the field "cbselector" to "1"
         And I click on "Send a message" "button"
         Then I should see "Message body"
         And I should see "student1@asd.com"