diff --git a/block_townsquare.php b/block_townsquare.php
index a57fe7c..a333b02 100644
--- a/block_townsquare.php
+++ b/block_townsquare.php
@@ -16,7 +16,6 @@
 
 use block_townsquare\contentcontroller;
 
-
 /**
  * Plugin strings are defined here.
  *
diff --git a/classes/external.php b/classes/external.php
index 365decb..f8920e0 100644
--- a/classes/external.php
+++ b/classes/external.php
@@ -141,15 +141,7 @@ public static function record_usersettings($userid, $timefilterpast, $timefilter
         // Check if the user already has a record in the database.
         if ($records = $DB->get_records('block_townsquare_preferences', ['userid' => $userid])) {
             // If there more than a record (it only should be only one), delete all of them and insert the new one.
-            if (count($records) > 1) {
-                try {
-                    foreach ($records as $record) {
-                        $DB->delete_records('block_townsquare_preferences', ['id' => $record->id]);
-                    }
-                } catch (Exception $e) {
-                    return false;
-                }
-            } else {
+            if (count($records) <= 1) {
                 // Upgrade the existing record.
                 $record = reset($records);
                 $record->timefilterpast = $params['timefilterpast'];
@@ -161,6 +153,13 @@ public static function record_usersettings($userid, $timefilterpast, $timefilter
                 $DB->update_record('block_townsquare_preferences', $record);
                 return true;
             }
+            try {
+                foreach ($records as $record) {
+                    $DB->delete_records('block_townsquare_preferences', ['id' => $record->id]);
+                }
+            } catch (Exception $e) {
+                return false;
+            }
         }
         $record = new stdClass();
         $record->userid = $params['userid'];
diff --git a/classes/letter/post_letter.php b/classes/letter/post_letter.php
index 9cc51e9..565a387 100644
--- a/classes/letter/post_letter.php
+++ b/classes/letter/post_letter.php
@@ -23,6 +23,8 @@
  */
 
 namespace block_townsquare\letter;
+use context_module;
+use core_user\fields;
 use moodle_url;
 use stdClass;
 
@@ -146,16 +148,16 @@ private function retrieve_profilepicture() {
         global $DB, $OUTPUT;
 
         // Profile picture is only retrieved if the author is visible.
-        if (!$this->post->anonymous) {
-            $user = new stdClass();
-            $picturefields = \core_user\fields::get_picture_fields();
-            $user = username_load_fields_from_object($user, $DB->get_record('user', ['id' => $this->author->id]),
-                                            null, $picturefields);
-            $user->id = $this->author->id;
-            $this->author->picture = $OUTPUT->user_picture($user, ['courseid' => $this->courseid, 'link' => false]);
-        } else {
+        if ($this->post->anonymous) {
             $this->author->picture = '';
+            return;
         }
+        $user = new stdClass();
+        $picturefields = fields::get_picture_fields();
+        $user = username_load_fields_from_object($user, $DB->get_record('user', ['id' => $this->author->id]),
+            null, $picturefields);
+        $user->id = $this->author->id;
+        $this->author->picture = $OUTPUT->user_picture($user, ['courseid' => $this->courseid, 'link' => false]);
     }
 
     /**
@@ -164,11 +166,11 @@ private function retrieve_profilepicture() {
      * @return void
      */
     private function add_anonymousattribute($postevent): void {
-        if ($postevent->modulename == 'moodleoverflow') {
-            $this->post->anonymous = $postevent->anonymous;
-        } else {
+        if ($postevent->modulename != 'moodleoverflow') {
             $this->post->anonymous = false;
+            return;
         }
+        $this->post->anonymous = $postevent->anonymous;
     }
 
     /**
@@ -198,7 +200,7 @@ private function add_privatereplyattribute($postevent): void {
      * @return string
      */
     private function format_post($postevent) {
-        $context = \context_module::instance($postevent->coursemoduleid);
+        $context = context_module::instance($postevent->coursemoduleid);
         $message = file_rewrite_pluginfile_urls($postevent->content, 'pluginfile.php', $context->id,
                                     'mod_'. $postevent->modulename, 'post', $postevent->postid, ['includetoken' => true]);
         $options = new stdClass();
diff --git a/classes/privacy/provider.php b/classes/privacy/provider.php
index 087118c..a1d50a2 100644
--- a/classes/privacy/provider.php
+++ b/classes/privacy/provider.php
@@ -29,6 +29,7 @@
 use core_privacy\local\request\approved_contextlist;
 use core_privacy\local\request\contextlist;
 use core_privacy\local\request\writer;
+use stdClass;
 
 
 /**
@@ -113,7 +114,7 @@ public static function export_user_data(approved_contextlist $contextlist): void
         $results = $DB->get_records('block_townsquare_preferences', ['userid' => $contextlist->get_user()->id]);
 
         foreach ($results as $result) {
-            $data = new \stdClass();
+            $data = new stdClass();
             $data->userid = $result->userid;
             $data->timefilterpast = $result->timefilterpast;
             $data->timefilterfuture = $result->timefilterfuture;
diff --git a/lang/en/block_townsquare.php b/lang/en/block_townsquare.php
index 11c3c5e..c219ac5 100644
--- a/lang/en/block_townsquare.php
+++ b/lang/en/block_townsquare.php
@@ -41,7 +41,7 @@
 $string['configcompletionlettercolor'] = 'Configuration for the color of the activity completion letters';
 $string['configorientationmarkercolor'] = 'Configuration for the color of the orientation marker';
 $string['configpostlettercolor'] = 'Configuration for the color of the post letters';
-$string['configtimespan'] = 'Setting, in which time span townsquare will search for events and notifications';
+$string['configtimespan'] = 'Setting, in which time span townsquare will search for notification in the past and future';
 $string['coursefilter'] = 'Course filter';
 $string['dataclosemessage'] = 'Please submit your entries until {$a->time}. The database closes afterwards';
 $string['dataopenmessage'] = 'The database opens today';
diff --git a/locallib.php b/locallib.php
index 458ae32..6c93f92 100644
--- a/locallib.php
+++ b/locallib.php
@@ -40,7 +40,7 @@ function townsquare_get_colorsetting($lettertype): string {
         case 'orientationmarker':
             return get_config('block_townsquare', 'orientationmarkercolor');
         default:
-            throw new \moodle_exception('invalidlettertype', 'block_townsquare');
+            throw new moodle_exception('invalidlettertype', 'block_townsquare');
     }
 }
 
diff --git a/tests/contentcontroller_test.php b/tests/contentcontroller_test.php
index 7cfcab3..8be35ba 100644
--- a/tests/contentcontroller_test.php
+++ b/tests/contentcontroller_test.php
@@ -16,6 +16,8 @@
 
 namespace block_townsquare;
 
+use stdClass;
+
 /**
  * Unit tests for the block_townsquare.
  *
@@ -54,7 +56,7 @@ final class contentcontroller_test extends \advanced_testcase {
     // Construct functions.
 
     public function setUp(): void {
-        $this->testdata = new \stdClass();
+        $this->testdata = new stdClass();
         $this->resetAfterTest();
         $this->helper_course_set_up();
     }
diff --git a/tests/coreevents_test.php b/tests/coreevents_test.php
index 5e82ff5..dda904c 100644
--- a/tests/coreevents_test.php
+++ b/tests/coreevents_test.php
@@ -21,6 +21,7 @@
 global $CFG;
 require_once($CFG->libdir . '/completionlib.php');
 
+use core_completion_external;
 use stdClass;
 
 /**
@@ -81,11 +82,11 @@ public function test_sortorder(): void {
         $timestamp = 9999999999;
         $result = true;
         foreach ($coreevents as $event) {
-            if ($timestamp >= $event->timestart) {
-                $timestamp = $event->timestart;
-            } else {
+            if ($timestamp < $event->timestart) {
                 $result = false;
+                break;
             }
+            $timestamp = $event->timestart;
         }
 
         $this->assertEquals(true, $result);
@@ -210,7 +211,7 @@ public function test_activitycompletion(): void {
         $this->assertEquals(1, $count);
 
         // Test case 2: The student marks the assignment as completed, the activity completion event should disappear.
-        \core_completion_external::update_activity_completion_status_manually($this->testdata->assignment1->cmid, true);
+        core_completion_external::update_activity_completion_status_manually($this->testdata->assignment1->cmid, true);
 
         $coreevents = $this->get_coreevents_from_user($this->testdata->student1);
         $result = true;
diff --git a/tests/external_test.php b/tests/external_test.php
index 8168228..ca8fa9a 100644
--- a/tests/external_test.php
+++ b/tests/external_test.php
@@ -24,6 +24,8 @@
 
 namespace block_townsquare;
 
+use stdClass;
+
 defined('MOODLE_INTERNAL') || die();
 
 global $CFG;
@@ -36,7 +38,7 @@
  * @copyright 2024 Tamaro Walter
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  *
- * @covers \block_townsquare\external
+ * @covers external
  * @runTestsInSeparateProcesses
  */
 final class external_test extends \advanced_testcase {
@@ -52,7 +54,7 @@ public function setUp(): void {
     public function test_record_usersettings(): void {
         global $DB;
 
-        $usersetting = new \stdClass();
+        $usersetting = new stdClass();
         $usersetting->userid = 1;
         $usersetting->timefilterpast = 432000;
         $usersetting->timefilterfuture = 2592000;
@@ -67,7 +69,7 @@ public function test_record_usersettings(): void {
         $this->assertEquals(false, $record);
 
         // Call the function to record the user settings and check, if the record is created.
-        $result = \block_townsquare\external::record_usersettings($usersetting->userid,
+        $result = external::record_usersettings($usersetting->userid,
                                                                   $usersetting->timefilterpast,
                                                                   $usersetting->timefilterfuture, $usersetting->basicletter,
                                                                   $usersetting->completionletter, $usersetting->postletter);
@@ -90,7 +92,7 @@ public function test_record_usersettings(): void {
         $usersetting->postletter = 0;
 
         // Call the function to record the user settings and check, if the record is created.
-        $result = \block_townsquare\external::record_usersettings($usersetting->userid, $usersetting->timefilterpast,
+        $result = external::record_usersettings($usersetting->userid, $usersetting->timefilterpast,
                                                                   $usersetting->timefilterfuture, $usersetting->basicletter,
                                                                   $usersetting->completionletter, $usersetting->postletter);
 
@@ -116,7 +118,7 @@ public function test_reset_usersettings(): void {
         $this->assertEquals(1, count($DB->get_records('block_townsquare_preferences', ['userid' => 1])));
 
         // Test case 1: Wrong parameters.
-        \block_townsquare\external::reset_usersettings(2);
+        external::reset_usersettings(2);
         $this->assertEquals(1, count($DB->get_records('block_townsquare_preferences', ['userid' => 1])));
 
         // Test case 2: For some reason, many records from the same user exist.
diff --git a/tests/postevents_test.php b/tests/postevents_test.php
index 9ad10ab..4f947c7 100644
--- a/tests/postevents_test.php
+++ b/tests/postevents_test.php
@@ -24,6 +24,7 @@
 
 namespace block_townsquare;
 
+use Exception;
 use stdClass;
 
 /**
@@ -82,11 +83,11 @@ public function test_sortorder(): void {
         $timestamp = 9999999999;
         $result = true;
         foreach ($posts as $post) {
-            if ($timestamp >= $post->timestart) {
-                $timestamp = $post->timestart;
-            } else {
+            if ($timestamp < $post->timestart) {
                 $result = false;
+                break;
             }
+            $timestamp = $post->timestart;
         }
 
         $this->assertEquals(true, $result);
@@ -137,7 +138,7 @@ public function test_module_forum(): void {
         $posts = $this->get_postevents_from_user($this->testdata->teacher);
 
         $result = true;
-        // Check if there are no more moodleoverflow posts.
+        // Check if there are no more forum posts.
         foreach ($posts as $post) {
             if ($post->modulename == 'forum') {
                 $result = false;
@@ -384,11 +385,8 @@ private function helper_course_set_up(): void {
         $this->getDataGenerator()->enrol_user($this->testdata->student2->id, $this->testdata->course2->id, 'student');
 
         // Check if moodleoverflow is available.
-        if ($DB->get_record('modules', ['name' => 'moodleoverflow', 'visible' => 1])) {
-            $this->modoverflowinstalled = true;
-        } else {
-            $this->modoverflowinstalled = false;
-        }
+        $DB->get_record('modules', ['name' => 'moodleoverflow', 'visible' => 1]) ? $this->modoverflowinstalled = true :
+                                                                                           $this->modoverflowinstalled = false;
     }
 
     /**
@@ -475,7 +473,7 @@ private function make_anonymous($moodleoverflow, $anonymoussetting): void {
             $moodleoverflow->anonymous = $anonymoussetting;
             $DB->update_record('moodleoverflow', $moodleoverflow);
         } else {
-            throw new \Exception('invalid parameter, anonymoussetting should be 1 or 2');
+            throw new Exception('invalid parameter, anonymoussetting should be 1 or 2');
         }
     }
 
diff --git a/tests/privacy/provider_test.php b/tests/privacy/provider_test.php
index af5afb5..d98d884 100644
--- a/tests/privacy/provider_test.php
+++ b/tests/privacy/provider_test.php
@@ -27,9 +27,9 @@
 use core_privacy\local\request\approved_contextlist;
 use core_privacy\local\request\approved_userlist;
 use core_privacy\local\request\userlist;
-use block_townsquare\privacy\provider;
 use core_privacy\local\request\writer;
 use core_privacy\tests\provider_testcase;
+use stdClass;
 
 /**
  * PHPUnit tests for testing the functionalities of the townsquare privacy provider
@@ -51,7 +51,7 @@ final class provider_test extends provider_testcase {
 
     public function setUp(): void {
         // Create a course and a user.
-        $this->testdata = new \stdClass();
+        $this->testdata = new stdClass();
         $this->testdata->course = $this->getDataGenerator()->create_course(['enablecompletion' => 1]);
         $this->testdata->student = $this->getDataGenerator()->create_user();
         $this->testdata->studentcontext = \context_user::instance($this->testdata->student->id);
@@ -235,7 +235,7 @@ public function test_delete_data_for_users(): void {
     private function helper_add_preference($userid) {
         global $DB;
         // Create a user preference for townsquare content filter.
-        $this->testdata->setting = new \stdClass();
+        $this->testdata->setting = new stdClass();
         $this->testdata->setting->userid = $userid;
         $this->testdata->setting->timefilterpast = 15778463;
         $this->testdata->setting->timefilterfuture = 15778463;