diff --git a/tests/e2e/Controllers/NodeControllerTest.php b/tests/e2e/Controllers/NodeControllerTest.php
index 28f0932..ab01495 100644
--- a/tests/e2e/Controllers/NodeControllerTest.php
+++ b/tests/e2e/Controllers/NodeControllerTest.php
@@ -8,6 +8,7 @@ use App\Node\UseCases\CreateNode;
 use App\Text\CreateTextDto;
 use PHPUnit\Framework\TestCase;
 use Slim\Psr7\Factory\ServerRequestFactory;
+use Slim\Psr7\Factory\StreamFactory;
 use Slim\Psr7\Response;
 use Tests\Fakes\FakeNodeRepository;
 use Tests\Fakes\FakeTextRepository;
@@ -92,13 +93,15 @@ class NodeControllerTest extends TestCase
             parentNode: null,
         ));
 
+        $body = (new StreamFactory())->createStream(json_encode([
+            'textId' => 0,
+            'title' => 'Child Node',
+            'parentNodeId' => $rootNode->getId(),
+        ]));
         $request = (new ServerRequestFactory())
             ->createServerRequest('POST', 'http://localhost/api/nodes')
-            ->withParsedBody([
-                'textId' => 0,
-                'title' => 'Child Node',
-                'parentNodeId' => $rootNode->getId(),
-            ]);
+            ->withHeader('Content-Type', 'application/json')
+            ->withBody($body);
 
         $response = $this->controller->createNode(
             $request,
@@ -115,12 +118,14 @@ class NodeControllerTest extends TestCase
 
     public function test_create_node_returns_400_when_title_missing(): void
     {
+        $body = (new StreamFactory())->createStream(json_encode([
+            'textId' => 0,
+            'parentNodeId' => null,
+        ]));
         $request = (new ServerRequestFactory())
             ->createServerRequest('POST', 'http://localhost/api/nodes')
-            ->withParsedBody([
-                'textId' => 0,
-                'parentNodeId' => null,
-            ]);
+            ->withHeader('Content-Type', 'application/json')
+            ->withBody($body);
 
         $response = $this->controller->createNode(
             $request,
@@ -133,13 +138,15 @@ class NodeControllerTest extends TestCase
 
     public function test_create_node_returns_404_when_text_not_found(): void
     {
+        $body = (new StreamFactory())->createStream(json_encode([
+            'textId' => 99,
+            'title' => 'Some Node',
+            'parentNodeId' => null,
+        ]));
         $request = (new ServerRequestFactory())
             ->createServerRequest('POST', 'http://localhost/api/nodes')
-            ->withParsedBody([
-                'textId' => 99,
-                'title' => 'Some Node',
-                'parentNodeId' => null,
-            ]);
+            ->withHeader('Content-Type', 'application/json')
+            ->withBody($body);
 
         $response = $this->controller->createNode(
             $request,