diff --git a/mod/quiz/accessrule/seb/rule.php b/mod/quiz/accessrule/seb/rule.php
index a348f5af011fd..22cb1054314f1 100644
--- a/mod/quiz/accessrule/seb/rule.php
+++ b/mod/quiz/accessrule/seb/rule.php
@@ -581,6 +581,10 @@ public static function save_override_settings($override) {
             $seboverride->timecreated = time();
             $DB->insert_record('quizaccess_seb_override', $seboverride);
         }
+
+        // Delete cache.
+        $quizid = $DB->get_field('quiz_overrides', 'quiz', ['id' => $override['overrideid']]);
+        seb_quiz_settings::delete_cache("$quizid-{$override['overrideid']}");
     }
 
     /**
diff --git a/mod/quiz/accessrule/seb/tests/override_test.php b/mod/quiz/accessrule/seb/tests/override_test.php
new file mode 100644
index 0000000000000..ea2a47ae02f8d
--- /dev/null
+++ b/mod/quiz/accessrule/seb/tests/override_test.php
@@ -0,0 +1,356 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+namespace quizaccess_seb;
+
+use mod_quiz\quiz_settings;
+use quizaccess_seb\helper;
+
+defined('MOODLE_INTERNAL') || die();
+
+global $CFG;
+require_once(__DIR__ . '/test_helper_trait.php');
+
+/**
+ * Tests for Safe Exam Browser access rules
+ *
+ * @package    quizaccess_seb
+ * @copyright  2024 Michael Kotlyar <michael.kotlyar@catalyst-eu.net>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+final class override_test extends \advanced_testcase {
+
+    use \quizaccess_seb_test_helper_trait;
+
+    /**
+     * Test quiz override for SEB configs.
+     */
+    public function test_override_over_no_seb(): void {
+        $this->resetAfterTest(true);
+
+        $this->course = $this->getDataGenerator()->create_course();
+        $this->user = $this->getDataGenerator()->create_user();
+        $overrideuser = $this->getDataGenerator()->create_user();
+
+        $this->getDataGenerator()->enrol_user($this->user->id, $this->course->id);
+        $this->getDataGenerator()->enrol_user($overrideuser->id, $this->course->id);
+
+        // Make a quiz.
+        $this->setAdminUser();
+        $this->quiz = $this->create_test_quiz($this->course);
+
+        // Check SEB settings for user (no SEB settings).
+        $this->setUser($this->user);
+        $raised = false;
+        try {
+            helper::get_seb_config_content($this->quiz->cmid);
+        } catch (\moodle_exception $e) {
+            $raised = true;
+            $this->assertMatchesRegularExpression(
+                '@' . 'No SEB config could be found for quiz with cmid: ' . $this->quiz->cmid . '@', 
+                $e->getMessage()
+            );
+        }
+        $this->assertTrue($raised);
+
+        // Check SEB settings for overrideuser (no SEB settings).
+        $this->setUser($overrideuser);
+        $raised = false;
+        try {
+            helper::get_seb_config_content($this->quiz->cmid);
+        } catch (\moodle_exception $e) {
+            $raised = true;
+            $this->assertMatchesRegularExpression(
+                '@' . 'No SEB config could be found for quiz with cmid: ' . $this->quiz->cmid . '@', 
+                $e->getMessage()
+            );
+        }
+        $this->assertTrue($raised);
+
+        // Create an override for overrideuser.
+        $this->setAdminUser();
+        $this->save_override($overrideuser);
+
+        // Check SEB settings for user (still no SEB settings).
+        $this->setUser($this->user);
+        $raised = false;
+        try {
+            helper::get_seb_config_content($this->quiz->cmid);
+        } catch (\moodle_exception $e) {
+            $raised = true;
+            $this->assertMatchesRegularExpression(
+                '@' . 'No SEB config could be found for quiz with cmid: ' . $this->quiz->cmid . '@', 
+                $e->getMessage()
+            );
+        }
+        $this->assertTrue($raised);
+    }
+
+    /**
+     * Test quiz override for SEB configs.
+     * 
+     * The same test as test_override_over_no_seb, but repeating the retieval of the settings to test if any caching is interferring
+     * with getting the right settings.
+     */
+    public function test_cached_override_over_no_seb(): void {
+        $this->resetAfterTest(true);
+
+        $this->course = $this->getDataGenerator()->create_course();
+        $this->user = $this->getDataGenerator()->create_user();
+        $overrideuser = $this->getDataGenerator()->create_user();
+
+        $this->getDataGenerator()->enrol_user($this->user->id, $this->course->id);
+        $this->getDataGenerator()->enrol_user($overrideuser->id, $this->course->id);
+
+        // Make a quiz.
+        $this->setAdminUser();
+        $this->quiz = $this->create_test_quiz($this->course);
+
+        // Check SEB settings for user (no SEB settings).
+        $this->setUser($this->user);
+        $raised = false;
+        try {
+            helper::get_seb_config_content($this->quiz->cmid);
+        } catch (\moodle_exception $e) {
+            $raised = true;
+            $this->assertMatchesRegularExpression(
+                '@' . 'No SEB config could be found for quiz with cmid: ' . $this->quiz->cmid . '@', 
+                $e->getMessage()
+            );
+        }
+        $this->assertTrue($raised);
+
+        // Check SEB settings for overrideuser (no SEB settings).
+        $this->setUser($overrideuser);
+        $raised = false;
+        try {
+            helper::get_seb_config_content($this->quiz->cmid);
+        } catch (\moodle_exception $e) {
+            $raised = true;
+            $this->assertMatchesRegularExpression(
+                '@' . 'No SEB config could be found for quiz with cmid: ' . $this->quiz->cmid . '@', 
+                $e->getMessage()
+            );
+        }
+        $this->assertTrue($raised);
+
+        // Create an override for overrideuser.
+        $this->setAdminUser();
+        $this->save_override($overrideuser);
+
+        // Check SEB settings for user (still no SEB settings).
+        $this->setUser($this->user);
+        $raised = false;
+        try {
+            helper::get_seb_config_content($this->quiz->cmid);
+        } catch (\moodle_exception $e) {
+            $raised = true;
+            $this->assertMatchesRegularExpression(
+                '@' . 'No SEB config could be found for quiz with cmid: ' . $this->quiz->cmid . '@', 
+                $e->getMessage()
+            );
+        }
+        $this->assertTrue($raised);
+        
+        // Check SEB settings for overrideuser.
+        $this->setUser($overrideuser);
+        $sebconfig = helper::get_seb_config_content($this->quiz->cmid);
+        $this->assertIsString($sebconfig);
+
+        // Cache should be set.
+        
+        // Checking SEB configs again.
+        // Check SEB settings for user (still no SEB settings).
+        $this->setUser($this->user);
+        $raised = false;
+        try {
+            helper::get_seb_config_content($this->quiz->cmid);
+        } catch (\moodle_exception $e) {
+            $raised = true;
+            $this->assertMatchesRegularExpression(
+                '@' . 'No SEB config could be found for quiz with cmid: ' . $this->quiz->cmid . '@', 
+                $e->getMessage()
+            );
+        }
+        $this->assertTrue($raised);
+        
+        // Check SEB settings for overrideuser.
+        $this->setUser($overrideuser);
+        $sebconfig = helper::get_seb_config_content($this->quiz->cmid);
+        $this->assertIsString($sebconfig);
+    }
+
+    /**
+     * Test quiz override for SEB configs.
+     */
+    public function test_override_settings_changed(): void {
+        $this->resetAfterTest(true);
+
+        $this->course = $this->getDataGenerator()->create_course();
+        $this->user = $this->getDataGenerator()->create_user();
+        $normaluser = $this->getDataGenerator()->create_user();
+
+        $this->getDataGenerator()->enrol_user($this->user->id, $this->course->id);
+        $this->getDataGenerator()->enrol_user($normaluser->id, $this->course->id);
+
+        // Make a quiz.
+        $this->setAdminUser();
+        $this->quiz = $this->create_test_quiz($this->course, settings_provider::USE_SEB_CONFIG_MANUALLY);
+
+        // Check SEB settings for user.
+        $this->setUser($this->user);
+        $sebconfig = seb_quiz_settings::get_by_quiz_id($this->quiz->id);
+
+        $this->assertEquals(1, $sebconfig->get('requiresafeexambrowser'));
+        $this->assertEquals(1, $sebconfig->get('showsebtaskbar'));
+        $this->assertEquals(0, $sebconfig->get('showwificontrol'));
+        $this->assertEquals(1, $sebconfig->get('showreloadbutton'));
+        $this->assertEquals(1, $sebconfig->get('showtime'));
+        $this->assertEquals(1, $sebconfig->get('showkeyboardlayout'));
+        $this->assertEquals(1, $sebconfig->get('allowuserquitseb'));
+        $this->assertEquals('', $sebconfig->get('quitpassword'));
+        $this->assertEquals('', $sebconfig->get('linkquitseb'));
+        $this->assertEquals(1, $sebconfig->get('userconfirmquit'));
+        $this->assertEquals(0, $sebconfig->get('enableaudiocontrol'));
+        $this->assertEquals(0, $sebconfig->get('muteonstartup'));
+        $this->assertEquals(0, $sebconfig->get('allowspellchecking'));
+        $this->assertEquals(1, $sebconfig->get('allowreloadinexam'));
+        $this->assertEquals(0, $sebconfig->get('activateurlfiltering'));
+        $this->assertEquals(0, $sebconfig->get('filterembeddedcontent'));
+        $this->assertEquals('', $sebconfig->get('expressionsallowed'));
+        $this->assertEquals('', $sebconfig->get('regexallowed'));
+        $this->assertEquals('', $sebconfig->get('expressionsblocked'));
+        $this->assertEquals('', $sebconfig->get('regexblocked'));
+        $this->assertEquals(1, $sebconfig->get('showsebdownloadlink'));
+        $this->assertEquals([], $sebconfig->get('allowedbrowserexamkeys'));
+
+        // Test cache.
+        $quizconfigkey = \cache::make('quizaccess_seb', 'configkey')->get($this->quiz->id);
+        $this->assertEquals("dc355fc028396158b14d3f383bdc1388039f5749d4d8b15242b243998b4f230f", $quizconfigkey);
+
+        $loadedquizconfigkey = $sebconfig::get_config_key_by_quiz_id($this->quiz->id);
+        $this->assertEquals($loadedquizconfigkey, $quizconfigkey);
+
+        // Override.
+        $this->setAdminUser();
+        $overrideid = $this->save_override($this->user, [
+            'seb_requiresafeexambrowser' => 1,
+            'seb_showsebtaskbar' => 0,
+            'seb_showwificontrol' => 1,
+            'seb_showreloadbutton' => 0,
+            'seb_showtime' => 0,
+            'seb_showkeyboardlayout' => 0,
+            'seb_allowuserquitseb' => 0,
+            'seb_quitpassword' => 'test',
+            'seb_linkquitseb' => 'https://example.com/quit',
+            'seb_userconfirmquit' => 0,
+            'seb_enableaudiocontrol' => 1,
+            'seb_muteonstartup' => 1,
+            'seb_allowspellchecking' => 1,
+            'seb_allowreloadinexam' => 0,
+            'seb_activateurlfiltering' => 1,
+            'seb_filterembeddedcontent' => 1,
+            'seb_expressionsallowed' => 'test.com',
+            'seb_regexallowed' => '^allow$',
+            'seb_expressionsblocked' => 'bad.com',
+            'seb_regexblocked' => '^bad$',
+            'seb_showsebdownloadlink' => 0,
+        ]);
+
+        // Test settings are overriden.
+        $this->setUser($this->user);
+        $sebconfig = seb_quiz_settings::get_by_quiz_id($this->quiz->id);
+
+        $this->assertEquals(1, $sebconfig->get('requiresafeexambrowser'));
+        $this->assertEquals(0, $sebconfig->get('showsebtaskbar'));
+        $this->assertEquals(1, $sebconfig->get('showwificontrol'));
+        $this->assertEquals(0, $sebconfig->get('showreloadbutton'));
+        $this->assertEquals(0, $sebconfig->get('showtime'));
+        $this->assertEquals(0, $sebconfig->get('showkeyboardlayout'));
+        $this->assertEquals(0, $sebconfig->get('allowuserquitseb'));
+        $this->assertEquals('test', $sebconfig->get('quitpassword'));
+        $this->assertEquals('https://example.com/quit', $sebconfig->get('linkquitseb'));
+        $this->assertEquals(0, $sebconfig->get('userconfirmquit'));
+        $this->assertEquals(1, $sebconfig->get('enableaudiocontrol'));
+        $this->assertEquals(1, $sebconfig->get('muteonstartup'));
+        $this->assertEquals(1, $sebconfig->get('allowspellchecking'));
+        $this->assertEquals(0, $sebconfig->get('allowreloadinexam'));
+        $this->assertEquals(1, $sebconfig->get('activateurlfiltering'));
+        $this->assertEquals(1, $sebconfig->get('filterembeddedcontent'));
+        $this->assertEquals('test.com', $sebconfig->get('expressionsallowed'));
+        $this->assertEquals('^allow$', $sebconfig->get('regexallowed'));
+        $this->assertEquals('bad.com', $sebconfig->get('expressionsblocked'));
+        $this->assertEquals('^bad$', $sebconfig->get('regexblocked'));
+        $this->assertEquals(0, $sebconfig->get('showsebdownloadlink'));
+        $this->assertEquals([], $sebconfig->get('allowedbrowserexamkeys'));
+
+        // Test override cache.
+        $configid = $sebconfig->get('id');
+        $cachekey = "{$this->quiz->id}-$configid";
+        $quizconfigkey = \cache::make('quizaccess_seb', 'configkey')->get($cachekey);
+        $this->assertEquals("dc355fc028396158b14d3f383bdc1388039f5749d4d8b15242b243998b4f230f", $quizconfigkey);
+
+        $loadedquizconfigkey = $sebconfig::get_config_key_by_quiz_id($this->quiz->id);
+        $this->assertEquals($loadedquizconfigkey, $quizconfigkey);
+
+    }
+
+    /**
+     * Create initial SEB settings data for quiz_override db table.
+     *
+     * @param bool|Array $settings Override settings with this array
+     * @return string
+     */
+    private function save_override($user = false, $settings = false) {
+        $user = $user ?: $this->user;
+
+        $initialsettings = [
+            'seb_enabled' => '1',
+            'seb_requiresafeexambrowser' => '1',
+            'seb_showsebtaskbar' => '1',
+            'seb_showwificontrol' => '0',
+            'seb_showreloadbutton' => '1',
+            'seb_showtime' => '0',
+            'seb_showkeyboardlayout' => '1',
+            'seb_allowuserquitseb' => '1',
+            'seb_quitpassword' => 'test',
+            'seb_linkquitseb' => '',
+            'seb_userconfirmquit' => '1',
+            'seb_enableaudiocontrol' => '1',
+            'seb_muteonstartup' => '0',
+            'seb_allowspellchecking' => '0',
+            'seb_allowreloadinexam' => '1',
+            'seb_activateurlfiltering' => '1',
+            'seb_filterembeddedcontent' => '0',
+            'seb_expressionsallowed' => 'test.com',
+            'seb_regexallowed' => '',
+            'seb_expressionsblocked' => '',
+            'seb_regexblocked' => '',
+            'seb_showsebdownloadlink' => '1',
+        ];
+
+        if (is_array($settings)) {
+            $initialsettings = array_merge($initialsettings, $settings);
+        }
+
+        $quizobj = quiz_settings::create($this->quiz->id);
+        $manager = $quizobj->get_override_manager();
+        return $manager->save_override([
+            'userid' => $user->id,
+            ...$initialsettings,
+        ]);
+    }
+}
diff --git a/mod/quiz/accessrule/seb/tests/quiz_settings_test.php b/mod/quiz/accessrule/seb/tests/quiz_settings_test.php
index b70988aeb7a68..bb2330e5caa99 100644
--- a/mod/quiz/accessrule/seb/tests/quiz_settings_test.php
+++ b/mod/quiz/accessrule/seb/tests/quiz_settings_test.php
@@ -730,26 +730,6 @@ public function test_generates_config_values_as_null_when_expected(): void {
         $this->assertNotNull($quizsettings->get_config_key());
     }
 
-    /**
-     * Test that quizsettings cache exists after creation.
-     */
-    public function test_quizsettings_cache_exists_after_creation(): void {
-        $expected = seb_quiz_settings::get_record(['quizid' => $this->quiz->id]);
-        $this->assertEquals($expected->to_record(), \cache::make('quizaccess_seb', 'quizsettings')->get($this->quiz->id));
-    }
-
-    /**
-     * Test that quizsettings cache gets deleted after deletion.
-     */
-    public function test_quizsettings_cache_purged_after_deletion(): void {
-        $this->assertNotEmpty(\cache::make('quizaccess_seb', 'quizsettings')->get($this->quiz->id));
-
-        $quizsettings = seb_quiz_settings::get_record(['quizid' => $this->quiz->id]);
-        $quizsettings->delete();
-
-        $this->assertFalse(\cache::make('quizaccess_seb', 'quizsettings')->get($this->quiz->id));
-    }
-
     /**
      * Test that we can get seb_quiz_settings by quiz id.
      */
@@ -770,25 +750,6 @@ public function test_get_quiz_settings_by_quiz_id(): void {
         $this->assertFalse(seb_quiz_settings::get_by_quiz_id(7777777));
     }
 
-    /**
-     * Test that SEB config cache exists after creation of the quiz.
-     */
-    public function test_config_cache_exists_after_creation(): void {
-        $this->assertNotEmpty(\cache::make('quizaccess_seb', 'config')->get($this->quiz->id));
-    }
-
-    /**
-     * Test that SEB config cache gets deleted after deletion.
-     */
-    public function test_config_cache_purged_after_deletion(): void {
-        $this->assertNotEmpty(\cache::make('quizaccess_seb', 'config')->get($this->quiz->id));
-
-        $quizsettings = seb_quiz_settings::get_record(['quizid' => $this->quiz->id]);
-        $quizsettings->delete();
-
-        $this->assertFalse(\cache::make('quizaccess_seb', 'config')->get($this->quiz->id));
-    }
-
     /**
      * Test that we can get SEB config by quiz id.
      */
@@ -810,25 +771,6 @@ public function test_get_config_by_quiz_id(): void {
         $this->assertNull(seb_quiz_settings::get_config_by_quiz_id(7777777));
     }
 
-    /**
-     * Test that SEB config key cache exists after creation of the quiz.
-     */
-    public function test_config_key_cache_exists_after_creation(): void {
-        $this->assertNotEmpty(\cache::make('quizaccess_seb', 'configkey')->get($this->quiz->id));
-    }
-
-    /**
-     * Test that SEB config key cache gets deleted after deletion.
-     */
-    public function test_config_key_cache_purged_after_deletion(): void {
-        $this->assertNotEmpty(\cache::make('quizaccess_seb', 'configkey')->get($this->quiz->id));
-
-        $quizsettings = seb_quiz_settings::get_record(['quizid' => $this->quiz->id]);
-        $quizsettings->delete();
-
-        $this->assertFalse(\cache::make('quizaccess_seb', 'configkey')->get($this->quiz->id));
-    }
-
     /**
      * Test that we can get SEB config key by quiz id.
      */