diff --git a/mod/quiz/attemptlib.php b/mod/quiz/attemptlib.php
index 2ae53e3a6de..b0efecec374 100644
--- a/mod/quiz/attemptlib.php
+++ b/mod/quiz/attemptlib.php
@@ -1160,7 +1160,7 @@ class quiz_attempt {
         $DB->update_record('quiz_attempts', $this->attempt);
 
         if (!$this->is_preview()) {
-            quiz_save_best_grade($this->get_quiz());
+            quiz_save_best_grade($this->get_quiz(), $this->attempt->userid);
 
             // Trigger event
             $eventdata = new stdClass();
diff --git a/mod/quiz/editlib.php b/mod/quiz/editlib.php
index 29e99d7490f..0370dc31494 100644
--- a/mod/quiz/editlib.php
+++ b/mod/quiz/editlib.php
@@ -346,7 +346,7 @@ function quiz_move_question_down($layout, $questionid) {
  */
 function quiz_print_question_list($quiz, $pageurl, $allowdelete, $reordertool,
         $quiz_qbanktool, $hasattempts, $defaultcategoryobj) {
-    global $USER, $CFG, $DB, $OUTPUT;
+    global $CFG, $DB, $OUTPUT;
     $strorder = get_string('order');
     $strquestionname = get_string('questionname', 'quiz');
     $strgrade = get_string('grade');
@@ -1212,7 +1212,7 @@ class quiz_question_bank_view extends question_bank_view {
  *      the last value used +1.
  */
 function quiz_print_grading_form($quiz, $pageurl, $tabindex) {
-    global $USER, $OUTPUT;
+    global $OUTPUT;
     $strsave = get_string('save', 'quiz');
     echo '<form method="post" action="edit.php" class="quizsavegradesform"><div>';
     echo '<fieldset class="invisiblefieldset" style="display: block;">';
diff --git a/mod/quiz/lib.php b/mod/quiz/lib.php
index 06c79dfcd13..5680552cc76 100644
--- a/mod/quiz/lib.php
+++ b/mod/quiz/lib.php
@@ -1720,7 +1720,7 @@ function quiz_pluginfile($course, $cm, $context, $filearea, $args, $forcedownloa
  */
 function mod_quiz_question_pluginfile($course, $context, $component,
         $filearea, $qubaid, $slot, $args, $forcedownload) {
-    global $USER, $CFG;
+    global $CFG;
     require_once($CFG->dirroot . '/mod/quiz/locallib.php');
 
     $attemptobj = quiz_attempt::create_from_usage_id($qubaid);
diff --git a/mod/quiz/locallib.php b/mod/quiz/locallib.php
index b96ab1aad07..8c3dcf633b8 100644
--- a/mod/quiz/locallib.php
+++ b/mod/quiz/locallib.php
@@ -508,8 +508,7 @@ function quiz_set_grade($newgrade, $quiz) {
  * @return bool Indicates success or failure.
  */
 function quiz_save_best_grade($quiz, $userid = null, $attempts = array()) {
-    global $DB;
-    global $USER, $OUTPUT;
+    global $DB, $OUTPUT, $USER;
 
     if (empty($userid)) {
         $userid = $USER->id;
@@ -1149,8 +1148,6 @@ function quiz_send_confirmation($recipient, $a) {
  */
 function quiz_send_notification($recipient, $submitter, $a) {
 
-    global $USER;
-
     // Recipient info for template
     $a->useridnumber = $recipient->idnumber;
     $a->username     = fullname($recipient);
diff --git a/mod/quiz/override_form.php b/mod/quiz/override_form.php
index c5e12f4dca2..d18348adb99 100644
--- a/mod/quiz/override_form.php
+++ b/mod/quiz/override_form.php
@@ -58,7 +58,7 @@ class quiz_override_form extends moodleform {
     }
 
     protected function definition() {
-        global $CFG, $USER, $DB;
+        global $CFG, $DB;
 
         $cm = $this->cm;
         $mform = $this->_form;
diff --git a/mod/quiz/view.php b/mod/quiz/view.php
index 8e5d49ccff0..4236cf55549 100644
--- a/mod/quiz/view.php
+++ b/mod/quiz/view.php
@@ -78,11 +78,6 @@ $completion->set_module_viewed($cm);
 // Initialize $PAGE, compute blocks
 $PAGE->set_url('/mod/quiz/view.php', array('id' => $cm->id));
 
-$edit = optional_param('edit', -1, PARAM_BOOL);
-if ($edit != -1 && $PAGE->user_allowed_editing()) {
-    $USER->editing = $edit;
-}
-
 // Get this user's attempts.
 $attempts = quiz_get_user_attempts($quiz->id, $USER->id, 'finished', true);
 $lastfinishedattempt = end($attempts);