Use a new class TestObject

tests/ResponseTest.php

@@ -22,12 +22,6 @@
 use function fopen;
 use function property_exists;
 
-final class TestException implements \Stringable {
-    public function __toString(): string {
-        return 'Slim OK';
-    }
-}
-
 class ResponseTest extends TestCase
 {
     public function testConstructorWithDefaultArgs()
@@ -148,7 +142,7 @@ public function testReasonPhraseContainsLineFeed()
     public function testWithStatusValidReasonPhraseObject()
     {
         $response = new Response();
-        $response = $response->withStatus(200, new TestException());
+        $response = $response->withStatus(200, new TestObject('Slim OK'));
         $this->assertEquals('Slim OK', $response->getReasonPhrase());
     }
 

tests/TestObject.php

@@ -0,0 +1,23 @@
+<?php
+
+/**
+ * Slim Framework (https://slimframework.com)
+ *
+ * @license https://github.com/slimphp/Slim-Psr7/blob/master/LICENSE.md (MIT License)
+ */
+
+declare(strict_types=1);
+
+namespace Slim\Tests\Psr7;
+
+final class TestObject implements \Stringable
+{
+    public function __construct(private string $value)
+    {
+    }
+
+    public function __toString(): string
+    {
+        return $this->value;
+    }
+}

tests/UriTest.php

@@ -15,15 +15,6 @@
 use Slim\Psr7\Uri;
 use stdClass;
 
-final class TestObject implements \Stringable {
-
-    public function __construct(private readonly string $value) {}
-
-    public function __toString(): string {
-        return $this->value;
-    }
-}
-
 class UriTest extends TestCase
 {
     public function uriFactory(): Uri