diff --git a/tests/openapi.yaml b/tests/openapi.yaml
index 6af0ebd..7aa4102 100644
--- a/tests/openapi.yaml
+++ b/tests/openapi.yaml
@@ -5,7 +5,7 @@ info:
 servers:
   - url: 'http://localhost'
 paths:
-  "/hello-world":
+  /hello-world:
     get:
       responses:
         200:
@@ -13,7 +13,18 @@ paths:
           content:
             application/json:
               schema:
-                $ref: "#/components/schemas/HelloWorld"
+                $ref: '#/components/schemas/HelloWorld'
+
+  /nested-property:
+    get:
+      responses:
+        200:
+          description: Nested property request
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/NestedProperty'
+
 components:
   schemas:
     HelloWorld:
@@ -23,4 +34,17 @@ components:
       properties:
         hello:
           type: string
-          example: "world"
+          example: 'world'
+
+    NestedProperty:
+      type: object
+      required:
+        - nested
+      properties:
+        nested:
+          type: object
+          required:
+            - property
+          properties:
+            property:
+              type: string
diff --git a/tests/unit/OpenApiValidatorTest.php b/tests/unit/OpenApiValidatorTest.php
index 07bb278..51ed676 100644
--- a/tests/unit/OpenApiValidatorTest.php
+++ b/tests/unit/OpenApiValidatorTest.php
@@ -42,7 +42,7 @@ public function testValidatorThrowsErrorWhenRequestIsInvalid(): void
             ->method('getRequest')
             ->willReturn($request);
 
-        self::expectExceptionObject(
+        $this->expectExceptionObject(
             new AssertionFailedError(
                 \sprintf(
                     '%s%s%s',
@@ -72,7 +72,7 @@ public function testValidatorThrowsErrorWhenResponseIsInvalid(): void
             ->method('getResponse')
             ->willReturn($response);
 
-        self::expectExceptionObject(
+        $this->expectExceptionObject(
             new AssertionFailedError(
                 \sprintf(
                     '%s%s%s%s%s',
@@ -87,4 +87,36 @@ public function testValidatorThrowsErrorWhenResponseIsInvalid(): void
 
         self::assertOpenApiSchema('tests/openapi.yaml', $browser);
     }
+
+    public function testValidatorThrowsErrorWhenNestedResponseIsInvalid(): void
+    {
+        $request = Request::create(uri: 'https://localhost/nested-property', server: [
+            'HTTP_X_REQUESTED_WITH',
+            'XMLHttpRequest',
+        ]);
+        $response = new JsonResponse(['nested' => new \stdClass()], headers: ['content-type' => 'application/json']);
+
+        $browser = $this->createMock(KernelBrowser::class);
+        $browser->expects(self::once())
+            ->method('getRequest')
+            ->willReturn($request);
+        $browser->expects(self::once())
+            ->method('getResponse')
+            ->willReturn($response);
+
+        $this->expectExceptionObject(
+            new AssertionFailedError(
+                \sprintf(
+                    '%s%s%s%s%s',
+                    'OpenAPI response error at nested.property:',
+                    "\n",
+                    'Body does not match schema for content-type "application/json" for Response [get /nested-property 200]',
+                    "\n",
+                    'Keyword validation failed: Required property \'property\' must be present in the object'
+                )
+            )
+        );
+
+        self::assertOpenApiSchema('tests/openapi.yaml', $browser);
+    }
 }