diff --git a/mod/quiz/report/statistics/statistics_table.php b/mod/quiz/report/statistics/statistics_table.php
index 0643c5bbadd..90adc895ad4 100644
--- a/mod/quiz/report/statistics/statistics_table.php
+++ b/mod/quiz/report/statistics/statistics_table.php
@@ -134,6 +134,9 @@ class quiz_statistics_table extends flexible_table {
         parent::setup();
     }
 
+    /**
+     * Open a div tag to wrap statistics table.
+     */
     public function  wrap_html_start() {
         // Horrible Moodle 2.0 wide-content work-around.
         if (!$this->is_downloading()) {
@@ -142,6 +145,9 @@ class quiz_statistics_table extends flexible_table {
         }
     }
 
+    /**
+     * Close a statistics table div.
+     */
     public function wrap_html_finish() {
         if (!$this->is_downloading()) {
             echo html_writer::end_tag('div');
diff --git a/mod/quiz/tests/behat/behat_mod_quiz.php b/mod/quiz/tests/behat/behat_mod_quiz.php
index 09e5b2b3b63..7d5750e8c03 100644
--- a/mod/quiz/tests/behat/behat_mod_quiz.php
+++ b/mod/quiz/tests/behat/behat_mod_quiz.php
@@ -702,8 +702,8 @@ class behat_mod_quiz extends behat_question_base {
      * to force either which random question was chose, or which random variant
      * was used, as for {@link user_has_attempted_with_responses()} above.
      *
-     * @param string $quizname the name of the quiz the user will attempt.
      * @param string $username the username of the user that will attempt.
+     * @param string $quizname the name of the quiz the user will attempt.
      * @param TableNode $attemptinfo information about the questions to add, as above.
      * @Given /^user "([^"]*)" has started an attempt at quiz "([^"]*) randomised as follows:"$/
      */
@@ -773,8 +773,8 @@ class behat_mod_quiz extends behat_question_base {
      * There is no need to supply answers to all questions. If so, other questions will be
      * left unanswered.
      *
-     * @param string $quizname the name of the quiz the user will attempt.
      * @param string $username the username of the user that will attempt.
+     * @param string $quizname the name of the quiz the user will attempt.
      * @param TableNode $attemptinfo information about the questions to add, as above.
      * @throws \Behat\Mink\Exception\ExpectationException
      * @Given /^user "([^"]*)" has checked answers in their attempt at quiz "([^"]*)":$/
diff --git a/question/tests/calculated_question_summary_test.php b/question/tests/calculated_question_summary_test.php
index 47f3a130ff2..b52c06f2405 100644
--- a/question/tests/calculated_question_summary_test.php
+++ b/question/tests/calculated_question_summary_test.php
@@ -97,6 +97,8 @@ class core_question_calculated_question_summary_testcase extends advanced_testca
     }
 
     /**
+     * Unit test for get_min_max_of() method.
+     *
      * @dataProvider get_min_max_provider
      */
     public function test_get_min_max_of($subqstats, $expected) {
@@ -148,6 +150,8 @@ class core_question_calculated_question_summary_testcase extends advanced_testca
     }
 
     /**
+     * Unit test for get_min_max_of_sd() method.
+     *
      * @dataProvider get_sd_min_max_provider
      */
     public function test_get_min_max_of_sd($subqstats, $expected) {