diff --git a/tests/src/flextype/core/HelpersTest.php b/tests/src/flextype/core/HelpersTest.php
index 78e77d46..6f69c325 100644
--- a/tests/src/flextype/core/HelpersTest.php
+++ b/tests/src/flextype/core/HelpersTest.php
@@ -6,17 +6,22 @@ use Flextype\Flextype;
 use Flextype\Content\Content;
 use Atomastic\Strings\Strings;
 use Slim\App;
+use DI\Container;
 
 test('test flextype() helper', function () {
     $this->assertSame(flextype(), Flextype::getInstance());
+    expect(flextype())->toBeInstanceOf(Flextype::class);
 });
 
 test('test app() helper', function () {
     $this->assertSame(app(), Flextype::getInstance()->app());
+    expect(app())->toBeInstanceOf(App::class);
 });
 
 test('test container() helper', function () {
     $this->assertSame(container(), Flextype::getInstance()->container());
+    $this->assertSame(container(), Flextype::getInstance()->app()->getContainer());
+    expect(container())->toBeInstanceOf(Container::class);
 });
 
 test('test emitter() helper', function () {