diff --git a/tests/Feature/Logger/EngelsystemLoggerTest.php b/tests/Feature/Logger/EngelsystemLoggerTest.php
index cb7e18f3..89f62765 100644
--- a/tests/Feature/Logger/EngelsystemLoggerTest.php
+++ b/tests/Feature/Logger/EngelsystemLoggerTest.php
@@ -93,6 +93,7 @@ class EngelsystemLoggerTest extends ApplicationFeatureTest
     }
 
     /**
+     * @covers       \Engelsystem\Logger\EngelsystemLogger::interpolate
      * @covers       \Engelsystem\Logger\EngelsystemLogger::log
      * @dataProvider provideContextReplaceValues
      *
@@ -132,6 +133,7 @@ class EngelsystemLoggerTest extends ApplicationFeatureTest
     }
 
     /**
+     * @covers \Engelsystem\Logger\EngelsystemLogger::checkLevel
      * @covers \Engelsystem\Logger\EngelsystemLogger::log
      */
     public function testThrowExceptionOnInvalidLevel()
diff --git a/tests/Unit/Container/ServiceProviderTest.php b/tests/Unit/Container/ServiceProviderTest.php
index 8a9cb76e..b817e3bb 100644
--- a/tests/Unit/Container/ServiceProviderTest.php
+++ b/tests/Unit/Container/ServiceProviderTest.php
@@ -10,6 +10,8 @@ class ConfigServiceProviderTest extends ServiceProviderTest
 {
     /**
      * @covers \Engelsystem\Container\ServiceProvider::__construct
+     * @covers \Engelsystem\Container\ServiceProvider::register
+     * @covers \Engelsystem\Container\ServiceProvider::boot
      */
     public function testRegister()
     {
@@ -18,5 +20,8 @@ class ConfigServiceProviderTest extends ServiceProviderTest
         $serviceProvider = new ServiceProviderImplementation($app);
 
         $this->assertInstanceOf(ServiceProvider::class, $serviceProvider);
+
+        $serviceProvider->register();
+        $serviceProvider->boot();
     }
 }
diff --git a/tests/Unit/Database/Migration/MigrateTest.php b/tests/Unit/Database/Migration/MigrateTest.php
index 3a9adbe8..6dffbe2f 100644
--- a/tests/Unit/Database/Migration/MigrateTest.php
+++ b/tests/Unit/Database/Migration/MigrateTest.php
@@ -54,6 +54,8 @@ class MigrateTest extends TestCase
         $migration->expects($this->atLeastOnce())
             ->method('migrate')
             ->withConsecutive(
+                ['foo/9876_03_22_210000_random_hack.php', '9876_03_22_210000_random_hack', Migrate::UP],
+                ['foo/9999_99_99_999999_another_foo.php', '9999_99_99_999999_another_foo', Migrate::UP],
                 ['foo/9876_03_22_210000_random_hack.php', '9876_03_22_210000_random_hack', Migrate::UP],
                 ['foo/9999_99_99_999999_another_foo.php', '9999_99_99_999999_another_foo', Migrate::UP],
                 ['foo/9876_03_22_210000_random_hack.php', '9876_03_22_210000_random_hack', Migrate::UP],
@@ -62,12 +64,16 @@ class MigrateTest extends TestCase
         $migration->expects($this->atLeastOnce())
             ->method('setMigrated')
             ->withConsecutive(
+                ['9876_03_22_210000_random_hack', Migrate::UP],
+                ['9999_99_99_999999_another_foo', Migrate::UP],
                 ['9876_03_22_210000_random_hack', Migrate::UP],
                 ['9999_99_99_999999_another_foo', Migrate::UP],
                 ['9876_03_22_210000_random_hack', Migrate::UP],
                 ['4567_11_01_000000_do_stuff', Migrate::DOWN]
             );
 
+        $migration->run('foo', Migrate::UP);
+
         $messages = [];
         $migration->setOutput(function ($text) use (&$messages) {
             $messages[] = $text;
diff --git a/tests/Unit/Mail/Transport/TransportTest.php b/tests/Unit/Mail/Transport/TransportTest.php
index 60f2079d..5e7b7b9b 100644
--- a/tests/Unit/Mail/Transport/TransportTest.php
+++ b/tests/Unit/Mail/Transport/TransportTest.php
@@ -5,6 +5,7 @@ namespace Engelsystem\Test\Unit\Mail\Transport;
 use Engelsystem\Test\Unit\Mail\Transport\Stub\TransportImplementation;
 use PHPUnit\Framework\MockObject\MockObject;
 use PHPUnit\Framework\TestCase;
+use Swift_Events_EventListener;
 use Swift_Mime_SimpleMessage as SimpleMessage;
 
 class TransportTest extends TestCase
@@ -12,13 +13,24 @@ class TransportTest extends TestCase
     /**
      * @covers \Engelsystem\Mail\Transport\Transport::isStarted
      * @covers \Engelsystem\Mail\Transport\Transport::ping
+     * @covers \Engelsystem\Mail\Transport\Transport::registerPlugin
+     * @covers \Engelsystem\Mail\Transport\Transport::start
+     * @covers \Engelsystem\Mail\Transport\Transport::stop
      */
     public function testMethods()
     {
+        /** @var Swift_Events_EventListener|MockObject $plugin */
+        $plugin = $this->getMockForAbstractClass(Swift_Events_EventListener::class);
+
         $transport = new TransportImplementation();
 
+        $transport->start();
+        $transport->registerPlugin($plugin);
+
         $this->assertTrue($transport->isStarted());
         $this->assertTrue($transport->ping());
+
+        $transport->stop();
     }
 
     /**