diff --git a/tests/cases/ClientFactoryTest.php b/tests/cases/ClientFactoryTest.php
new file mode 100644
index 0000000..cdbdaea
--- /dev/null
+++ b/tests/cases/ClientFactoryTest.php
@@ -0,0 +1,45 @@
+<?php declare(strict_types = 1);
+
+namespace Tests\Cases;
+
+use Contributte;
+use FilipSedivy;
+use Tester;
+use Tester\Assert;
+
+require __DIR__ . '/../bootstrap.php';
+
+class ClientFactoryTest extends Tester\TestCase
+{
+
+	public function testCreateFactory(): void
+	{
+		$certificateFactory = new Contributte\EET\CertificateFactory(DATA_DIR . '/EET_CA1_Playground-CZ00000019.p12', 'eet');
+		$clientFactory = new Contributte\EET\ClientFactory($certificateFactory, Contributte\EET\Dispatcher::PLAYGROUND_SERVICE, true);
+
+		Assert::type(new Contributte\EET\Dispatcher($certificateFactory->create()), $clientFactory->create());
+	}
+
+	public function testCertificateBadPassword(): void
+	{
+		$certificateFactory = new Contributte\EET\CertificateFactory(DATA_DIR . '/EET_CA1_Playground-CZ00000019.p12', 'nothing');
+		$clientFactory = new Contributte\EET\ClientFactory($certificateFactory, Contributte\EET\Dispatcher::PLAYGROUND_SERVICE, true);
+
+		Assert::exception(static function () use ($clientFactory): void {
+			$clientFactory->create();
+		}, FilipSedivy\EET\Exceptions\Certificate\CertificateExportFailedException::class);
+	}
+
+	public function testCertificateNotFound(): void
+	{
+		$certificateFactory = new Contributte\EET\CertificateFactory(DATA_DIR . '/EET_CA1_Playground.p12', 'eet');
+		$clientFactory = new Contributte\EET\ClientFactory($certificateFactory, Contributte\EET\Dispatcher::PLAYGROUND_SERVICE, true);
+
+		Assert::exception(static function () use ($clientFactory): void {
+			$clientFactory->create();
+		}, FilipSedivy\EET\Exceptions\Certificate\CertificateNotFoundException::class);
+	}
+
+}
+
+(new ClientFactoryTest())->run();
diff --git a/tests/cases/DI/EETExtensionTest.php b/tests/cases/DI/EETExtensionTest.php
new file mode 100644
index 0000000..fa33342
--- /dev/null
+++ b/tests/cases/DI/EETExtensionTest.php
@@ -0,0 +1,75 @@
+<?php declare(strict_types = 1);
+
+namespace Tests\Cases\DI;
+
+use Contributte;
+use Nette;
+use Tester;
+use Tester\Assert;
+use Tester\FileMock;
+
+require __DIR__ . '/../../bootstrap.php';
+
+class EETExtensionTest extends Tester\TestCase
+{
+
+	public function testNoParameters(): void
+	{
+		$loader = new Nette\DI\ContainerLoader(TEMP_DIR, true);
+
+		Assert::exception(function () use ($loader): void {
+			$loader->load(function (Nette\DI\Compiler $compiler): void {
+				$compiler->addExtension('eet', new Contributte\EET\DI\EETExtension());
+			}, [getmygid(), __METHOD__]);
+		}, Nette\DI\InvalidConfigurationException::class);
+	}
+
+	public function testRequireParameters(): void
+	{
+		$loader = new Nette\DI\ContainerLoader(TEMP_DIR, true);
+		$class = $loader->load(function (Nette\DI\Compiler $compiler): void {
+			$compiler->addExtension('eet', new Contributte\EET\DI\EETExtension());
+			$compiler->loadConfig(FileMock::create('
+			eet:
+				certificate:
+					file: Playground.p12
+					password: eet
+			', 'neon'));
+		}, [getmygid(), __METHOD__]);
+
+		/** @var Nette\DI\Container $container */
+		$container = new $class();
+
+		Assert::type(Contributte\EET\ClientFactory::class, $container->getByType(Contributte\EET\ClientFactory::class));
+		Assert::type(Contributte\EET\ReceiptFactory::class, $container->getByType(Contributte\EET\ReceiptFactory::class));
+	}
+
+	public function testDefaultReceiptParams(): void
+	{
+		$loader = new Nette\DI\ContainerLoader(TEMP_DIR, true);
+		$class = $loader->load(function (Nette\DI\Compiler $compiler): void {
+			$compiler->addExtension('eet', new Contributte\EET\DI\EETExtension());
+			$compiler->loadConfig(FileMock::create('
+			eet:
+				certificate:
+					file: Playground.p12
+					password: eet
+
+				receipt:
+					id_provoz: 1234
+					dic_popl: CZ1234
+			', 'neon'));
+		}, [getmygid(), __METHOD__]);
+
+		/** @var Nette\DI\Container $container */
+		$container = new $class();
+
+		$receipt = $container->getByType(Contributte\EET\ReceiptFactory::class)->create();
+
+		Assert::same($receipt->id_provoz, 1234);
+		Assert::same($receipt->dic_popl, 'CZ1234');
+	}
+
+}
+
+(new EETExtensionTest())->run();