diff --git a/tests/BaseTest.php b/tests/BaseTest.php
index b0d1a48..d717b79 100644
--- a/tests/BaseTest.php
+++ b/tests/BaseTest.php
@@ -7,6 +7,7 @@
 namespace Alltube\Test;
 
 use Alltube\Config;
+use Exception;
 use PHPUnit\Framework\TestCase;
 
 /**
@@ -32,6 +33,7 @@ abstract class BaseTest extends TestCase
 
     /**
      * Prepare tests.
+     * @throws Exception
      */
     protected function setUp(): void
     {
diff --git a/tests/ConfigTest.php b/tests/ConfigTest.php
index bacdc3a..09374cf 100644
--- a/tests/ConfigTest.php
+++ b/tests/ConfigTest.php
@@ -23,6 +23,7 @@ class ConfigTest extends BaseTest
 
     /**
      * Prepare tests.
+     * @throws Exception
      */
     protected function setUp(): void
     {
@@ -39,7 +40,7 @@ class ConfigTest extends BaseTest
     public function testGetInstance()
     {
         $config = Config::getInstance();
-        $this->assertEquals($config->convert, false);
+        $this->assertEquals(false, $config->convert);
         $this->assertConfig($config);
     }
 
@@ -53,7 +54,7 @@ class ConfigTest extends BaseTest
         Config::destroyInstance();
 
         $config = Config::getInstance();
-        $this->assertEquals($config->convert, false);
+        $this->assertEquals(false, $config->convert);
         $this->assertConfig($config);
     }
 
@@ -81,6 +82,7 @@ class ConfigTest extends BaseTest
      * Test the setFile function.
      *
      * @return void
+     * @throws Exception
      */
     public function testSetFile()
     {
@@ -103,24 +105,26 @@ class ConfigTest extends BaseTest
      * Test the setOptions function.
      *
      * @return void
+     * @throws Exception
      */
     public function testSetOptions()
     {
         Config::setOptions(['appName' => 'foo']);
         $config = Config::getInstance();
-        $this->assertEquals($config->appName, 'foo');
+        $this->assertEquals('foo', $config->appName);
     }
 
     /**
      * Test the setOptions function.
      *
      * @return void
+     * @throws Exception
      */
     public function testSetOptionsWithoutUpdate()
     {
         Config::setOptions(['appName' => 'foo'], false);
         $config = Config::getInstance();
-        $this->assertEquals($config->appName, 'foo');
+        $this->assertEquals('foo', $config->appName);
     }
 
     /**
@@ -149,6 +153,7 @@ class ConfigTest extends BaseTest
      * Test the getInstance function with the CONVERT and PYTHON environment variables.
      *
      * @return void
+     * @throws Exception
      */
     public function testGetInstanceWithEnv()
     {
@@ -156,7 +161,7 @@ class ConfigTest extends BaseTest
         putenv('CONVERT=1');
         Config::setFile($this->getConfigFile());
         $config = Config::getInstance();
-        $this->assertEquals($config->convert, true);
+        $this->assertEquals(true, $config->convert);
         putenv('CONVERT');
     }
 }
diff --git a/tests/ControllerTest.php b/tests/ControllerTest.php
index 7d90efe..cea9f59 100644
--- a/tests/ControllerTest.php
+++ b/tests/ControllerTest.php
@@ -10,6 +10,7 @@ use Alltube\Controller\DownloadController;
 use Alltube\Controller\FrontController;
 use Alltube\LocaleManager;
 use Alltube\ViewFactory;
+use Exception;
 use Slim\Container;
 use Slim\Http\Environment;
 use Slim\Http\Request;
@@ -48,6 +49,7 @@ abstract class ControllerTest extends BaseTest
 
     /**
      * Prepare tests.
+     * @throws Exception
      */
     protected function setUp(): void
     {
diff --git a/tests/ConvertedPlaylistArchiveStreamTest.php b/tests/ConvertedPlaylistArchiveStreamTest.php
index 57c7fe6..e8cb002 100644
--- a/tests/ConvertedPlaylistArchiveStreamTest.php
+++ b/tests/ConvertedPlaylistArchiveStreamTest.php
@@ -8,6 +8,7 @@ namespace Alltube\Test;
 
 use Alltube\Stream\ConvertedPlaylistArchiveStream;
 use Alltube\Video;
+use Exception;
 
 /**
  * Unit tests for the ConvertedPlaylistArchiveStream class.
@@ -17,6 +18,7 @@ class ConvertedPlaylistArchiveStreamTest extends StreamTest
 {
     /**
      * Prepare tests.
+     * @throws Exception
      */
     protected function setUp(): void
     {
diff --git a/tests/DownloadControllerTest.php b/tests/DownloadControllerTest.php
index 9e93c98..761ba21 100644
--- a/tests/DownloadControllerTest.php
+++ b/tests/DownloadControllerTest.php
@@ -8,6 +8,7 @@ namespace Alltube\Test;
 
 use Alltube\Config;
 use Alltube\Controller\DownloadController;
+use Exception;
 
 /**
  * Unit tests for the FrontController class.
@@ -17,6 +18,7 @@ class DownloadControllerTest extends ControllerTest
 {
     /**
      * Prepare tests.
+     * @throws Exception
      */
     protected function setUp(): void
     {
@@ -62,6 +64,7 @@ class DownloadControllerTest extends ControllerTest
      * Test the download() function with streams enabled.
      *
      * @return void
+     * @throws Exception
      */
     public function testDownloadWithStream()
     {
@@ -77,6 +80,7 @@ class DownloadControllerTest extends ControllerTest
      * Test the download() function with an M3U stream.
      *
      * @return void
+     * @throws Exception
      */
     public function testDownloadWithM3uStream()
     {
@@ -96,6 +100,7 @@ class DownloadControllerTest extends ControllerTest
      * Test the download() function with an RTMP stream.
      *
      * @return void
+     * @throws Exception
      */
     public function testDownloadWithRtmpStream()
     {
@@ -113,6 +118,7 @@ class DownloadControllerTest extends ControllerTest
      * Test the download() function with a remuxed video.
      *
      * @return void
+     * @throws Exception
      */
     public function testDownloadWithRemux()
     {
@@ -182,6 +188,7 @@ class DownloadControllerTest extends ControllerTest
      *
      * @return void
      * @requires OS Linux
+     * @throws Exception
      */
     public function testDownloadWithPlaylist()
     {
@@ -197,6 +204,7 @@ class DownloadControllerTest extends ControllerTest
      * Test the download() function with an advanced conversion.
      *
      * @return void
+     * @throws Exception
      */
     public function testDownloadWithAdvancedConversion()
     {
diff --git a/tests/FrontControllerTest.php b/tests/FrontControllerTest.php
index 20b34bf..f75a457 100644
--- a/tests/FrontControllerTest.php
+++ b/tests/FrontControllerTest.php
@@ -19,6 +19,7 @@ class FrontControllerTest extends ControllerTest
 {
     /**
      * Prepare tests.
+     * @throws Exception
      */
     protected function setUp(): void
     {
@@ -41,6 +42,7 @@ class FrontControllerTest extends ControllerTest
      * Test the constructor with streams enabled.
      *
      * @return void
+     * @throws Exception
      */
     public function testConstructorWithStream()
     {
@@ -120,6 +122,7 @@ class FrontControllerTest extends ControllerTest
      *
      * @return void
      * @requires download
+     * @throws Exception
      */
     public function testInfoWithAudio()
     {
@@ -136,6 +139,7 @@ class FrontControllerTest extends ControllerTest
      *
      * @return void
      * @requires download
+     * @throws Exception
      */
     public function testInfoWithVimeoAudio()
     {
@@ -150,6 +154,7 @@ class FrontControllerTest extends ControllerTest
      *
      * @return void
      * @requires download
+     * @throws Exception
      */
     public function testInfoWithUnconvertedAudio()
     {
@@ -197,6 +202,7 @@ class FrontControllerTest extends ControllerTest
      *
      * @return void
      * @requires download
+     * @throws Exception
      */
     public function testInfoWithStream()
     {
diff --git a/tests/JsonControllerTest.php b/tests/JsonControllerTest.php
index 9256c38..d2d6c3e 100644
--- a/tests/JsonControllerTest.php
+++ b/tests/JsonControllerTest.php
@@ -7,6 +7,7 @@
 namespace Alltube\Test;
 
 use Alltube\Controller\JsonController;
+use Exception;
 
 /**
  * Unit tests for the FrontController class.
@@ -15,6 +16,7 @@ class JsonControllerTest extends ControllerTest
 {
     /**
      * Prepare tests.
+     * @throws Exception
      */
     protected function setUp(): void
     {
diff --git a/tests/LocaleMiddlewareTest.php b/tests/LocaleMiddlewareTest.php
index d751bd9..feb05c2 100644
--- a/tests/LocaleMiddlewareTest.php
+++ b/tests/LocaleMiddlewareTest.php
@@ -6,7 +6,6 @@
 
 namespace Alltube\Test;
 
-use Alltube\Locale;
 use Alltube\LocaleManager;
 use Alltube\LocaleMiddleware;
 use Slim\Container;
diff --git a/tests/PlaylistArchiveStreamTest.php b/tests/PlaylistArchiveStreamTest.php
index 09848e3..f02a6ea 100644
--- a/tests/PlaylistArchiveStreamTest.php
+++ b/tests/PlaylistArchiveStreamTest.php
@@ -8,6 +8,7 @@ namespace Alltube\Test;
 
 use Alltube\Stream\PlaylistArchiveStream;
 use Alltube\Video;
+use Exception;
 
 /**
  * Unit tests for the PlaylistArchiveStream class.
@@ -17,6 +18,7 @@ class PlaylistArchiveStreamTest extends StreamTest
 {
     /**
      * Prepare tests.
+     * @throws Exception
      */
     protected function setUp(): void
     {
diff --git a/tests/VideoStubsTest.php b/tests/VideoStubsTest.php
index 755cdb2..51f758d 100644
--- a/tests/VideoStubsTest.php
+++ b/tests/VideoStubsTest.php
@@ -26,6 +26,7 @@ class VideoStubsTest extends BaseTest
 
     /**
      * Initialize properties used by test.
+     * @throws Exception
      */
     protected function setUp(): void
     {
diff --git a/tests/VideoTest.php b/tests/VideoTest.php
index 7967f47..d725c34 100644
--- a/tests/VideoTest.php
+++ b/tests/VideoTest.php
@@ -7,6 +7,8 @@
 namespace Alltube\Test;
 
 use Alltube\Config;
+use Alltube\Exception\EmptyUrlException;
+use Alltube\Exception\PasswordException;
 use Alltube\Video;
 use Exception;
 
@@ -20,6 +22,7 @@ class VideoTest extends BaseTest
      * Test getExtractors function.
      *
      * @return void
+     * @throws PasswordException
      */
     public function testGetExtractors()
     {
@@ -29,13 +32,15 @@ class VideoTest extends BaseTest
     /**
      * Test getUrl function.
      *
-     * @param string $url       URL
-     * @param string $format    Format
-     * @param string $filename  Filename
+     * @param string $url URL
+     * @param string $format Format
+     * @param string $filename Filename
      * @param string $extension File extension
-     * @param string $domain    Domain
+     * @param string $domain Domain
      *
      * @return void
+     * @throws PasswordException
+     * @throws EmptyUrlException
      * @dataProvider urlProvider
      * @dataProvider m3uUrlProvider
      * @dataProvider remuxUrlProvider
@@ -57,6 +62,8 @@ class VideoTest extends BaseTest
      * Test getUrl function with a protected video.
      *
      * @return void
+     * @throws EmptyUrlException
+     * @throws PasswordException
      */
     public function testgetUrlWithPassword()
     {
@@ -70,6 +77,8 @@ class VideoTest extends BaseTest
      * Test getUrl function with a protected video and no password.
      *
      * @return void
+     * @throws EmptyUrlException
+     * @throws PasswordException
      */
     public function testgetUrlWithMissingPassword()
     {
@@ -82,6 +91,8 @@ class VideoTest extends BaseTest
      * Test getUrl function with a protected video and a wrong password.
      *
      * @return void
+     * @throws EmptyUrlException
+     * @throws PasswordException
      */
     public function testgetUrlWithWrongPassword()
     {
@@ -96,6 +107,8 @@ class VideoTest extends BaseTest
      * @param string $url URL
      *
      * @return void
+     * @throws EmptyUrlException
+     * @throws PasswordException
      * @dataProvider      ErrorUrlProvider
      */
     public function testgetUrlError($url)
@@ -112,7 +125,7 @@ class VideoTest extends BaseTest
      */
     public function urlProvider()
     {
-        $videos = [
+        return [
             [
                 'https://www.youtube.com/watch?v=M7IpKCZ47pU', 'best[protocol^=http]',
                 'It_s_Not_Me_It_s_You_-_Hearts_Under_Fire-M7IpKCZ47pU',
@@ -139,8 +152,6 @@ class VideoTest extends BaseTest
                 'gcs-vimeo.akamaized.net',
             ]
         ];
-
-        return $videos;
     }
 
     /**
@@ -167,7 +178,7 @@ class VideoTest extends BaseTest
      */
     public function m3uUrlProvider()
     {
-        $videos = [
+        return [
             [
                 'https://twitter.com/verge/status/813055465324056576/video/1', 'hls-2176',
                 'The_Verge_-_This_tiny_origami_robot_can_self-fold_and_complete_tasks-813055465324056576',
@@ -175,8 +186,6 @@ class VideoTest extends BaseTest
                 'video.twimg.com',
             ]
         ];
-
-        return $videos;
     }
 
     /**
@@ -211,12 +220,13 @@ class VideoTest extends BaseTest
     /**
      * Test getJSON function.
      *
-     * @param string $url    URL
+     * @param string $url URL
      * @param string $format Format
      *
      * @return void
      * @dataProvider urlProvider
      * @dataProvider m3uUrlProvider
+     * @throws PasswordException
      */
     public function testGetJson($url, $format)
     {
@@ -237,6 +247,7 @@ class VideoTest extends BaseTest
      *
      * @return void
      * @dataProvider      ErrorURLProvider
+     * @throws PasswordException
      */
     public function testGetJsonError($url)
     {
@@ -248,15 +259,16 @@ class VideoTest extends BaseTest
     /**
      * Test getFilename function.
      *
-     * @param string $url       URL
-     * @param string $format    Format
-     * @param string $filename  Filename
+     * @param string $url URL
+     * @param string $format Format
+     * @param string $filename Filename
      * @param string $extension File extension
      *
      * @return void
      * @dataProvider urlProvider
      * @dataProvider m3uUrlProvider
      * @dataProvider remuxUrlProvider
+     * @throws PasswordException
      */
     public function testGetFilename($url, $format, $filename, $extension)
     {
@@ -271,6 +283,7 @@ class VideoTest extends BaseTest
      *
      * @return void
      * @dataProvider      ErrorUrlProvider
+     * @throws PasswordException
      */
     public function testGetFilenameError($url)
     {
@@ -282,11 +295,12 @@ class VideoTest extends BaseTest
     /**
      * Test getAudioStream function.
      *
-     * @param string $url    URL
+     * @param string $url URL
      * @param string $format Format
      *
      * @return void
      * @dataProvider urlProvider
+     * @throws Exception
      */
     public function testGetAudioStream($url, $format)
     {
@@ -371,11 +385,12 @@ class VideoTest extends BaseTest
     /**
      * Test getM3uStream function.
      *
-     * @param string $url    URL
+     * @param string $url URL
      * @param string $format Format
      *
      * @return void
      * @dataProvider m3uUrlProvider
+     * @throws Exception
      */
     public function testGetM3uStream($url, $format)
     {
@@ -386,11 +401,12 @@ class VideoTest extends BaseTest
     /**
      * Test getRemuxStream function.
      *
-     * @param string $url    URL
+     * @param string $url URL
      * @param string $format Format
      *
      * @return void
      * @dataProvider remuxUrlProvider
+     * @throws Exception
      */
     public function testGetRemuxStream($url, $format)
     {
@@ -417,11 +433,12 @@ class VideoTest extends BaseTest
     /**
      * Test getRtmpStream function.
      *
-     * @param string $url    URL
+     * @param string $url URL
      * @param string $format Format
      *
      * @return void
      * @dataProvider rtmpUrlProvider
+     * @throws Exception
      */
     public function testGetRtmpStream($url, $format)
     {
@@ -453,11 +470,12 @@ class VideoTest extends BaseTest
     /**
      * Test getConvertedStream function without avconv.
      *
-     * @param string $url    URL
+     * @param string $url URL
      * @param string $format Format
      *
      * @return void
      * @dataProvider urlProvider
+     * @throws Exception
      */
     public function testGetConvertedStream($url, $format)
     {
diff --git a/tests/ViewFactoryTest.php b/tests/ViewFactoryTest.php
index 45286c9..1bafff9 100644
--- a/tests/ViewFactoryTest.php
+++ b/tests/ViewFactoryTest.php
@@ -12,6 +12,7 @@ use Slim\Container;
 use Slim\Http\Environment;
 use Slim\Http\Request;
 use Slim\Views\Smarty;
+use SmartyException;
 
 /**
  * Unit tests for the ViewFactory class.
@@ -22,6 +23,7 @@ class ViewFactoryTest extends BaseTest
      * Test the create() function.
      *
      * @return void
+     * @throws SmartyException
      */
     public function testCreate()
     {
@@ -35,6 +37,7 @@ class ViewFactoryTest extends BaseTest
      * Test the create() function with a X-Forwarded-Proto header.
      *
      * @return void
+     * @throws SmartyException
      */
     public function testCreateWithXForwardedProto()
     {
diff --git a/tests/YoutubeChunkStreamTest.php b/tests/YoutubeChunkStreamTest.php
index 5cce098..fb68c2f 100644
--- a/tests/YoutubeChunkStreamTest.php
+++ b/tests/YoutubeChunkStreamTest.php
@@ -8,6 +8,8 @@ namespace Alltube\Test;
 
 use Alltube\Stream\YoutubeChunkStream;
 use Alltube\Video;
+use Exception;
+use GuzzleHttp\Exception\GuzzleException;
 
 /**
  * Unit tests for the YoutubeChunkStream class.
@@ -17,6 +19,8 @@ class YoutubeChunkStreamTest extends StreamTest
 {
     /**
      * Prepare tests.
+     * @throws Exception
+     * @throws GuzzleException
      */
     protected function setUp(): void
     {
diff --git a/tests/YoutubeStreamTest.php b/tests/YoutubeStreamTest.php
index 2345ea9..b8b4d13 100644
--- a/tests/YoutubeStreamTest.php
+++ b/tests/YoutubeStreamTest.php
@@ -8,6 +8,7 @@ namespace Alltube\Test;
 
 use Alltube\Stream\YoutubeStream;
 use Alltube\Video;
+use Exception;
 
 /**
  * Unit tests for the YoutubeStream class.
@@ -17,6 +18,7 @@ class YoutubeStreamTest extends StreamTest
 {
     /**
      * Prepare tests.
+     * @throws Exception
      */
     protected function setUp(): void
     {
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 72eed31..43b3b3d 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -9,7 +9,7 @@ use phpmock\mockery\PHPMockery;
 // Composer autoload.
 require_once __DIR__ . '/../vendor/autoload.php';
 
-ini_set('session.use_cookies', 0);
+ini_set('session.use_cookies', '0');
 session_cache_limiter('');
 session_start();