diff --git a/lib/medialib.php b/lib/medialib.php
index afde3b0b460..90651be11a1 100644
--- a/lib/medialib.php
+++ b/lib/medialib.php
@@ -35,26 +35,18 @@
 defined('MOODLE_INTERNAL') || die();
 
 if (!defined('CORE_MEDIA_VIDEO_WIDTH')) {
-    /**
-     * Default video width if no width is specified; some players may do something
-     * more intelligent such as use real video width.
-     *
-     * May be defined in config.php if required.
-     */
+    // Default video width if no width is specified; some players may do something
+    // more intelligent such as use real video width.
+    // May be defined in config.php if required.
     define('CORE_MEDIA_VIDEO_WIDTH', 400);
 }
 if (!defined('CORE_MEDIA_VIDEO_HEIGHT')) {
-    /**
-     * Default video height. May be defined in config.php if required.
-     */
+    // Default video height. May be defined in config.php if required.
     define('CORE_MEDIA_VIDEO_HEIGHT', 300);
 }
 if (!defined('CORE_MEDIA_AUDIO_WIDTH')) {
-    /**
-     * Default audio width if no width is specified.
-     *
-     * May be defined in config.php if required.
-     */
+    // Default audio width if no width is specified.
+    // May be defined in config.php if required.
     define('CORE_MEDIA_AUDIO_WIDTH', 300);
 }
 
diff --git a/lib/outputrenderers.php b/lib/outputrenderers.php
index 9e24b0f68ed..8bd3f38213d 100644
--- a/lib/outputrenderers.php
+++ b/lib/outputrenderers.php
@@ -2942,7 +2942,7 @@ class core_media_renderer extends plugin_renderer_base {
     protected function get_players() {
         global $CFG;
 
-        // Save time by only building the list once
+        // Save time by only building the list once.
         if (!$this->players) {
             // Get raw list of players.
             $players = $this->get_players_raw();
diff --git a/lib/tests/medialib_test.php b/lib/tests/medialib_test.php
index b73f053521e..a4181d4deab 100644
--- a/lib/tests/medialib_test.php
+++ b/lib/tests/medialib_test.php
@@ -42,7 +42,7 @@ class medialib_testcase extends advanced_testcase {
         global $CFG;
         parent::setUp();
 
-        // Reset CFG
+        // Reset CFG.
         $this->resetAfterTest(true);
 
         // Consistent initial setup: all players disabled.