diff --git a/admin/tool/mobile/db/hooks.php b/admin/tool/mobile/db/hooks.php
index 91b54ffc7a5..a0ec1affd99 100644
--- a/admin/tool/mobile/db/hooks.php
+++ b/admin/tool/mobile/db/hooks.php
@@ -26,8 +26,8 @@ defined('MOODLE_INTERNAL') || die();
 
 $callbacks = [
     [
-        'hook' => core\hook\output\before_standard_head_html_generation::class,
-        'callback' => 'tool_mobile\local\hook\output\before_standard_head_html_generation::callback',
+        'hook' => \core\hook\output\before_standard_head_html_generation::class,
+        'callback' => [\tool_mobile\local\hooks\output\before_standard_head_html_generation::class, 'callback'],
         'priority' => 0,
     ],
 ];
diff --git a/lib/classes/hook/manager.php b/lib/classes/hook/manager.php
index e793c5810e6..68475fa6707 100644
--- a/lib/classes/hook/manager.php
+++ b/lib/classes/hook/manager.php
@@ -546,6 +546,13 @@ final class manager implements
             return null;
         }
         $classmethod = $callback['callback'];
+        if (is_array($classmethod)) {
+            if (count($classmethod) !== 2) {
+                debugging("Hook callback definition contains invalid 'callback' array in '$component'", DEBUG_DEVELOPER);
+                return null;
+            }
+            $classmethod = implode('::', $classmethod);
+        }
         if (!is_string($classmethod)) {
             debugging("Hook callback definition contains invalid 'callback' string in '$component'", DEBUG_DEVELOPER);
             return null;
diff --git a/lib/tests/fixtures/hook/hooks1_valid.php b/lib/tests/fixtures/hook/hooks1_valid.php
index 78266ac4890..4559902229f 100644
--- a/lib/tests/fixtures/hook/hooks1_valid.php
+++ b/lib/tests/fixtures/hook/hooks1_valid.php
@@ -28,6 +28,6 @@ defined('MOODLE_INTERNAL') || die();
 $callbacks = [
     [
         'hook' => 'test_plugin\\hook\\hook',
-        'callback' => 'test_plugin\\callbacks::test1',
+        'callback' => [\test_plugin\callbacks::class, 'test1'],
     ],
 ];
diff --git a/lib/tests/hook/manager_test.php b/lib/tests/hook/manager_test.php
index e6f2674cd2a..77a3f55033b 100644
--- a/lib/tests/hook/manager_test.php
+++ b/lib/tests/hook/manager_test.php
@@ -19,19 +19,17 @@ namespace core\hook;
 /**
  * Hooks tests.
  *
- * @coversDefaultClass \core\hook\manager
- *
  * @package   core
  * @author    Petr Skoda
  * @copyright 2022 Open LMS
  * @license   https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ * @covers \core\hook\manager
  */
-class manager_test extends \advanced_testcase {
+final class manager_test extends \advanced_testcase {
     /**
      * Test public factory method to get hook manager.
-     * @covers ::get_instance
      */
-    public function test_get_instance() {
+    public function test_get_instance(): void {
         $manager = manager::get_instance();
         $this->assertInstanceOf(manager::class, $manager);
 
@@ -40,9 +38,8 @@ class manager_test extends \advanced_testcase {
 
     /**
      * Test getting of manager test instance.
-     * @covers ::phpunit_get_instance
      */
-    public function test_phpunit_get_instance() {
+    public function test_phpunit_get_instance(): void {
         $testmanager = manager::phpunit_get_instance([]);
         $this->assertSame([], $testmanager->get_hooks_with_callbacks());
 
@@ -58,13 +55,8 @@ class manager_test extends \advanced_testcase {
 
     /**
      * Test loading and parsing of callbacks from files.
-     *
-     * @covers ::get_callbacks_for_hook
-     * @covers ::get_hooks_with_callbacks
-     * @covers ::load_callbacks
-     * @covers ::add_component_callbacks
      */
-    public function test_callbacks() {
+    public function test_callbacks(): void {
         $componentfiles = [
             'test_plugin1' => __DIR__ . '/../fixtures/hook/hooks1_valid.php',
             'test_plugin2' => __DIR__ . '/../fixtures/hook/hooks2_valid.php',
@@ -94,18 +86,23 @@ class manager_test extends \advanced_testcase {
         $this->assertSame([], $testmanager->get_hooks_with_callbacks());
         $debuggings = $this->getDebuggingMessages();
         $this->resetDebugging();
-        $this->assertSame('Hook callback definition requires \'hook\' name in \'test_plugin1\'',
-            $debuggings[0]->message);
-        $this->assertSame('Hook callback definition requires \'callback\' callable in \'test_plugin1\'',
-            $debuggings[1]->message);
-        $this->assertSame('Hook callback definition contains invalid \'callback\' static class method string in \'test_plugin1\'',
-            $debuggings[2]->message);
+        $this->assertSame(
+            'Hook callback definition requires \'hook\' name in \'test_plugin1\'',
+            $debuggings[0]->message
+        );
+        $this->assertSame(
+            'Hook callback definition requires \'callback\' callable in \'test_plugin1\'',
+            $debuggings[1]->message
+        );
+        $this->assertSame(
+            'Hook callback definition contains invalid \'callback\' static class method string in \'test_plugin1\'',
+            $debuggings[2]->message
+        );
         $this->assertCount(3, $debuggings);
     }
 
     /**
      * Test hook dispatching, that is callback execution.
-     * @covers ::dispatch
      */
     public function test_dispatch(): void {
         require_once(__DIR__ . '/../fixtures/hook/hook.php');
@@ -127,7 +124,6 @@ class manager_test extends \advanced_testcase {
 
     /**
      * Test hook dispatching, that is callback execution.
-     * @covers ::dispatch
      */
     public function test_dispatch_with_exception(): void {
         require_once(__DIR__ . '/../fixtures/hook/hook.php');
@@ -149,7 +145,6 @@ class manager_test extends \advanced_testcase {
 
     /**
      * Test hook dispatching, that is callback execution.
-     * @covers ::dispatch
      */
     public function test_dispatch_with_invalid(): void {
         // Missing callbacks is ignored.
@@ -171,9 +166,8 @@ class manager_test extends \advanced_testcase {
 
     /**
      * Test stoppping of hook dispatching.
-     * @covers ::dispatch
      */
-    public function test_dispatch_stoppable() {
+    public function test_dispatch_stoppable(): void {
         require_once(__DIR__ . '/../fixtures/hook/stoppablehook.php');
         require_once(__DIR__ . '/../fixtures/hook/callbacks.php');
 
@@ -193,10 +187,8 @@ class manager_test extends \advanced_testcase {
 
     /**
      * Tests callbacks can be overridden via CFG settings.
-     * @covers ::load_callbacks
-     * @covers ::dispatch
      */
-    public function test_callback_overriding() {
+    public function test_callback_overriding(): void {
         global $CFG;
         $this->resetAfterTest();
 
@@ -224,8 +216,8 @@ class manager_test extends \advanced_testcase {
 
         $CFG->hooks_callback_overrides = [
             'test_plugin\\hook\\hook' => [
-                'test_plugin\\callbacks::test2' => ['priority' => 33]
-            ]
+                'test_plugin\\callbacks::test2' => ['priority' => 33],
+            ],
         ];
 
         $testmanager = manager::phpunit_get_instance($componentfiles);
@@ -249,8 +241,8 @@ class manager_test extends \advanced_testcase {
 
         $CFG->hooks_callback_overrides = [
             'test_plugin\\hook\\hook' => [
-                'test_plugin\\callbacks::test2' => ['priority' => 33, 'disabled' => true]
-            ]
+                'test_plugin\\callbacks::test2' => ['priority' => 33, 'disabled' => true],
+            ],
         ];
         $testmanager = manager::phpunit_get_instance($componentfiles);
         $this->assertSame(['test_plugin\\hook\\hook'], $testmanager->get_hooks_with_callbacks());
@@ -262,8 +254,7 @@ class manager_test extends \advanced_testcase {
             'component' => 'test_plugin1',
             'disabled' => false,
             'priority' => 100,
-        ],
-        $callbacks[0]);
+        ], $callbacks[0]);
         $this->assertSame([
             'callback' => 'test_plugin\\callbacks::test2',
             'component' => 'test_plugin2',
@@ -275,7 +266,7 @@ class manager_test extends \advanced_testcase {
         $CFG->hooks_callback_overrides = [
             'test_plugin\\hook\\hook' => [
                 'test_plugin\\callbacks::test2' => ['disabled' => true],
-            ]
+            ],
         ];
         $testmanager = manager::phpunit_get_instance($componentfiles);
         $this->assertSame(['test_plugin\\hook\\hook'], $testmanager->get_hooks_with_callbacks());