diff --git a/codeception.yml b/codeception.yml
index bab1217a1..6f6e33ee4 100644
--- a/codeception.yml
+++ b/codeception.yml
@@ -15,16 +15,25 @@ extensions:
   enabled:
     - Codeception\Extension\RunFailed
 modules:
-coverage:
-  enabled: true
-  include:
+coverage :
+  enabled : true
+  include :
     - src/*
-  exclude:
+  exclude :
+    # Application bootstrapping
+    - src/AppFactory.php
+    - src/EventDispatcher.php
+    - src/Exception.php
+    - src/Plugins.php
+
     # Used in application, but not used in tests
     - src/Radio/Frontend/ShoutCast2.php
+    - src/Console/*.php
     - src/Console/Command/*.php
     - src/Entity/Fixture/*
     - src/Entity/Migration/*
+    - src/Service/IpGeolocator/GeoLite.php
+    - src/RateLimit.php
 
     # Exceptions
     - src/Exception/*.php
diff --git a/src/Controller/Api/Admin/AuditLogController.php b/src/Controller/Api/Admin/AuditLogController.php
index f743e6334..83bcc03b7 100644
--- a/src/Controller/Api/Admin/AuditLogController.php
+++ b/src/Controller/Api/Admin/AuditLogController.php
@@ -41,7 +41,7 @@ class AuditLogController
             ->setParameter('start', $start->getTimestamp())
             ->setParameter('end', $end->getTimestamp());
 
-        $search_phrase = trim($params['searchPhrase']);
+        $search_phrase = trim($params['searchPhrase'] ?? '');
         if (!empty($search_phrase)) {
             $qb->andWhere('(a.user LIKE :query OR a.identifier LIKE :query OR a.target LIKE :query)')
                 ->setParameter('query', '%' . $search_phrase . '%');
diff --git a/tests/functional/Api_Admin_AuditLogCest.php b/tests/functional/Api_Admin_AuditLogCest.php
new file mode 100644
index 000000000..d8562d514
--- /dev/null
+++ b/tests/functional/Api_Admin_AuditLogCest.php
@@ -0,0 +1,16 @@
+<?php
+
+class Api_Admin_AuditLogCest extends CestAbstract
+{
+    /**
+     * @before setupComplete
+     * @before login
+     */
+    public function viewAuditLog(FunctionalTester $I): void
+    {
+        $I->wantTo('View audit log via API.');
+
+        $I->sendGet('/api/admin/auditlog');
+        $I->seeResponseCodeIs(200);
+    }
+}
diff --git a/tests/functional/Api_Admin_StorageLocationsCest.php b/tests/functional/Api_Admin_StorageLocationsCest.php
new file mode 100644
index 000000000..ec1cba708
--- /dev/null
+++ b/tests/functional/Api_Admin_StorageLocationsCest.php
@@ -0,0 +1,26 @@
+<?php
+
+class Api_Admin_StorageLocationsCest extends CestAbstract
+{
+    /**
+     * @before setupComplete
+     * @before login
+     */
+    public function manageStorageLocations(FunctionalTester $I): void
+    {
+        $I->wantTo('Manage storage locations via API.');
+
+        $this->testCrudApi(
+            $I,
+            '/api/admin/storage_locations',
+            [
+                'type' => \App\Entity\StorageLocation::TYPE_STATION_MEDIA,
+                'adapter' => \App\Entity\StorageLocation::ADAPTER_LOCAL,
+                'path' => '/tmp/test_storage_location',
+            ],
+            [
+                'path' => '/tmp/test_storage_location_2',
+            ]
+        );
+    }
+}
diff --git a/tests/functional/Api_Frontend_DashboardCest.php b/tests/functional/Api_Frontend_DashboardCest.php
new file mode 100644
index 000000000..fd378dcb3
--- /dev/null
+++ b/tests/functional/Api_Frontend_DashboardCest.php
@@ -0,0 +1,30 @@
+<?php
+
+class Api_Frontend_DashboardCest extends CestAbstract
+{
+    /**
+     * @before setupComplete
+     * @before login
+     */
+    public function checkDashboard(FunctionalTester $I): void
+    {
+        $I->wantTo('Check dashboard API functions.');
+
+        $I->sendGet('/api/frontend/dashboard/charts');
+
+        $I->seeResponseCodeIs(200);
+        $I->canSeeResponseContainsJson(
+            [
+                'metrics' => [],
+            ]
+        );
+
+        $I->sendGet('/api/frontend/dashboard/notifications');
+
+        $I->seeResponseCodeIs(200);
+
+        $I->sendGet('/api/frontend/dashboard/stations');
+
+        $I->seeResponseCodeIs(200);
+    }
+}
diff --git a/tests/unit/ExportsTest.php b/tests/unit/ExportsTest.php
index 0d7324870..c30717891 100644
--- a/tests/unit/ExportsTest.php
+++ b/tests/unit/ExportsTest.php
@@ -1,10 +1,10 @@
 <?php
+
+use App\Utilities;
+
 class ExportsTest extends \Codeception\Test\Unit
 {
-    /**
-     * @var \UnitTester
-     */
-    protected $tester;
+    protected UnitTester $tester;
 
     public function testExports()
     {
@@ -15,15 +15,15 @@ class ExportsTest extends \Codeception\Test\Unit
             ]
         ];
 
-        $csv = \App\Utilities\Csv::arrayToCsv($raw_data, false);
+        $csv = Utilities\Csv::arrayToCsv($raw_data, false);
         $this->assertStringContainsString('"test_field_a","test_field_b"', $csv);
 
         $raw_data = '<test><subtest>Contents</subtest></test>';
-        $xml_array = \App\Utilities\Xml::xmlToArray($raw_data);
+        $xml_array = Utilities\Xml::xmlToArray($raw_data);
 
         $this->assertArrayHasKey('test', $xml_array);
 
-        $xml = \App\Utilities\Xml::arrayToXml($xml_array);
+        $xml = Utilities\Xml::arrayToXml($xml_array);
 
         $this->assertStringContainsString($raw_data, $xml);
     }
diff --git a/tests/unit/ListenerIntervalTest.php b/tests/unit/ListenerIntervalTest.php
index 8b0dfc073..4482c9ee5 100644
--- a/tests/unit/ListenerIntervalTest.php
+++ b/tests/unit/ListenerIntervalTest.php
@@ -5,7 +5,7 @@ use Carbon\CarbonImmutable;
 
 class ListenerIntervalTest extends \Codeception\Test\Unit
 {
-    public function testListenerIntervals()
+    public function testListenerIntervals(): void
     {
         $utc = new \DateTimeZone('UTC');
 
@@ -29,6 +29,6 @@ class ListenerIntervalTest extends \Codeception\Test\Unit
         ];
 
         $expected = 6 * 60 * 60;
-        $this->assertEquals($expected, Entity\Listener::getListenerSeconds($intervals));
+        self::assertEquals($expected, Entity\Listener::getListenerSeconds($intervals));
     }
 }
diff --git a/tests/unit/StationPlaylistTest.php b/tests/unit/StationPlaylistTest.php
index b01825ee3..4a0eee287 100644
--- a/tests/unit/StationPlaylistTest.php
+++ b/tests/unit/StationPlaylistTest.php
@@ -8,13 +8,13 @@ class StationPlaylistTest extends \Codeception\Test\Unit
 
     protected App\Radio\AutoDJ\Scheduler $scheduler;
 
-    protected function _inject(App\Tests\Module $tests_module)
+    protected function _inject(App\Tests\Module $tests_module): void
     {
         $di = $tests_module->container;
         $this->scheduler = $di->get(App\Radio\AutoDJ\Scheduler::class);
     }
 
-    public function testScheduledPlaylist()
+    public function testScheduledPlaylist(): void
     {
         /** @var Entity\Station $station */
         $station = Mockery::mock(Entity\Station::class);
@@ -35,24 +35,24 @@ class StationPlaylistTest extends \Codeception\Test\Unit
         $test_thursday = \Carbon\CarbonImmutable::create(2018, 1, 18, 0, 0, 0, $utc);
 
         // Sanity check: Jan 15, 2018 is a Monday, and Jan 18, 2018 is a Thursday.
-        $this->assertTrue($test_monday->isMonday());
-        $this->assertTrue($test_thursday->isThursday());
+        self::assertTrue($test_monday->isMonday());
+        self::assertTrue($test_thursday->isThursday());
 
         // Playlist SHOULD play Monday evening at 10:30PM.
         $test_time = $test_monday->setTime(22, 30);
-        $this->assertTrue($this->scheduler->shouldPlaylistPlayNow($playlist, $test_time));
+        self::assertTrue($this->scheduler->shouldPlaylistPlayNow($playlist, $test_time));
 
         // Playlist SHOULD play Thursday morning at 3:00AM.
         $test_time = $test_thursday->setTime(3, 0);
-        $this->assertTrue($this->scheduler->shouldPlaylistPlayNow($playlist, $test_time));
+        self::assertTrue($this->scheduler->shouldPlaylistPlayNow($playlist, $test_time));
 
         // Playlist SHOULD NOT play Monday morning at 3:00AM.
         $test_time = $test_monday->setTime(3, 0);
-        $this->assertFalse($this->scheduler->shouldPlaylistPlayNow($playlist, $test_time));
+        self::assertFalse($this->scheduler->shouldPlaylistPlayNow($playlist, $test_time));
 
         // Playlist SHOULD NOT play Thursday evening at 10:30PM.
         $test_time = $test_thursday->setTime(22, 30);
-        $this->assertFalse($this->scheduler->shouldPlaylistPlayNow($playlist, $test_time));
+        self::assertFalse($this->scheduler->shouldPlaylistPlayNow($playlist, $test_time));
     }
 
     public function testOncePerXMinutesPlaylist()
@@ -72,13 +72,13 @@ class StationPlaylistTest extends \Codeception\Test\Unit
         $last_played = $test_day->addMinutes(0 - 20);
         $playlist->setPlayedAt($last_played->getTimestamp());
 
-        $this->assertFalse($this->scheduler->shouldPlaylistPlayNow($playlist, $test_day));
+        self::assertFalse($this->scheduler->shouldPlaylistPlayNow($playlist, $test_day));
 
         // Last played 40 minutes ago, SHOULD play again.
         $last_played = $test_day->addMinutes(0 - 40);
         $playlist->setPlayedAt($last_played->getTimestamp());
 
-        $this->assertTrue($this->scheduler->shouldPlaylistPlayNow($playlist, $test_day));
+        self::assertTrue($this->scheduler->shouldPlaylistPlayNow($playlist, $test_day));
     }
 
     public function testOncePerHourPlaylist()
@@ -96,18 +96,18 @@ class StationPlaylistTest extends \Codeception\Test\Unit
 
         // Playlist SHOULD try to play at 11:59 PM.
         $test_time = $test_day->setTime(23, 59);
-        $this->assertTrue($this->scheduler->shouldPlaylistPlayNow($playlist, $test_time));
+        self::assertTrue($this->scheduler->shouldPlaylistPlayNow($playlist, $test_time));
 
         // Playlist SHOULD try to play at 12:04 PM.
         $test_time = $test_day->setTime(12, 4);
-        $this->assertTrue($this->scheduler->shouldPlaylistPlayNow($playlist, $test_time));
+        self::assertTrue($this->scheduler->shouldPlaylistPlayNow($playlist, $test_time));
 
         // Playlist SHOULD NOT try to play at 11:49 PM.
         $test_time = $test_day->setTime(23, 49);
-        $this->assertFalse($this->scheduler->shouldPlaylistPlayNow($playlist, $test_time));
+        self::assertFalse($this->scheduler->shouldPlaylistPlayNow($playlist, $test_time));
 
         // Playlist SHOULD NOT try to play at 12:06 PM.
         $test_time = $test_day->setTime(12, 6);
-        $this->assertFalse($this->scheduler->shouldPlaylistPlayNow($playlist, $test_time));
+        self::assertFalse($this->scheduler->shouldPlaylistPlayNow($playlist, $test_time));
     }
 }
diff --git a/tests/unit/UtilitiesTest.php b/tests/unit/UtilitiesTest.php
index 798ec58d5..a4b3b4e19 100644
--- a/tests/unit/UtilitiesTest.php
+++ b/tests/unit/UtilitiesTest.php
@@ -4,24 +4,21 @@ use App\Utilities\Strings;
 
 class UtilitiesTest extends \Codeception\Test\Unit
 {
-    /**
-     * @var \UnitTester
-     */
-    protected $tester;
+    protected UnitTester $tester;
 
-    public function testUtilities()
+    public function testUtilities(): void
     {
         $test_result = Strings::generatePassword(10);
-        $this->assertTrue(strlen($test_result) == 10);
+        self::assertEquals(10, strlen($test_result));
 
         $test_string = 'Lorem ipsum dolor sit amet lorem ipsum dolor sit amet lorem ipsum dolor sit amet';
         $test_result = Strings::truncateText($test_string, 15);
         $expected_result = 'Lorem ipsum...';
-        $this->assertEquals($test_result, $expected_result);
+        self::assertEquals($test_result, $expected_result);
 
         $test_url = 'https://www.twitter.com/';
         $test_result = Strings::truncateUrl($test_url);
         $expected_result = 'twitter.com';
-        $this->assertEquals($test_result, $expected_result);
+        self::assertEquals($test_result, $expected_result);
     }
 }
diff --git a/tests/unit/XmlTest.php b/tests/unit/XmlTest.php
new file mode 100644
index 000000000..a3c499b31
--- /dev/null
+++ b/tests/unit/XmlTest.php
@@ -0,0 +1,50 @@
+<?php
+
+use App\Xml\Reader;
+use App\Xml\Writer;
+
+class XmlTest extends \Codeception\Test\Unit
+{
+    protected UnitTester $tester;
+
+    public function testXml(): void
+    {
+        $arrayValue = [
+            'mounts' => [
+                'mount' => [
+                    [
+                        '@type' => 'normal',
+                        'path' => '/radio.mp3',
+                    ],
+                    [
+                        '@type' => 'special',
+                        'path' => '/special.mp3',
+                    ],
+                ],
+            ],
+        ];
+
+        $xmlString = (new Writer())->toString($arrayValue, 'icecast');
+
+        $xmlExpected = <<<'XML'
+        <?xml version="1.0" encoding="UTF-8"?>
+        <icecast>
+            <mounts>
+                <mount type="normal">
+                    <path>/radio.mp3</path>
+                </mount>
+                <mount type="special">
+                    <path>/special.mp3</path>
+                </mount>
+            </mounts>
+        </icecast>
+
+        XML;
+
+        self::assertEquals($xmlString, $xmlExpected);
+
+        $backToArray = (new Reader())->fromString($xmlString);
+
+        self::assertEquals($arrayValue, $backToArray);
+    }
+}