--- mod/assign/renderer.php	Fri Nov  8 22:08:11 2019
+++ mod/assign/renderer.php	Fri Nov  8 22:09:07 2019
@@ -418,7 +418,8 @@
         if (isset($status->gradefordisplay)) {
             $cell1content = get_string('grade');
             $cell2content = $status->gradefordisplay;
-            $this->add_table_row_tuple($t, $cell1content, $cell2content);
+            $cell2attributes = array('class' => 'grade_value');
+            $this->add_table_row_tuple($t, $cell1content, $cell2content, [], $cell2attributes);
 
             // Grade date.
             $cell1content = get_string('gradedon', 'assign');