diff --git a/src/Objects/BaseObject.php b/src/Objects/BaseObject.php
index e97b704..62db193 100644
--- a/src/Objects/BaseObject.php
+++ b/src/Objects/BaseObject.php
@@ -161,4 +161,14 @@ public function __get(string $name)
 
         throw new PropertyDoesNotExistException("[{$name}] is not a valid property.");
     }
+
+    public static function __set_state(array $properties)
+    {
+        $obj = new static($properties['objectId']);
+
+        $obj->ref = $properties['ref'];
+        $obj->extensions = $properties['extensions'];
+
+        return $obj;
+    }
 }
diff --git a/src/Objects/Components.php b/src/Objects/Components.php
index f75a650..e0c9874 100644
--- a/src/Objects/Components.php
+++ b/src/Objects/Components.php
@@ -243,4 +243,18 @@ protected function generate(): array
             'callbacks' => $callbacks ?: null,
         ]);
     }
+    
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->schemas(...($properties['schemas'] ?? []))
+            ->responses(...($properties['responses'] ?? []))
+            ->parameters(...($properties['parameters'] ?? []))
+            ->examples(...($properties['examples'] ?? []))
+            ->requestBodies(...($properties['requestBodies'] ?? []))
+            ->headers(...($properties['headers'] ?? []))
+            ->securitySchemes(...($properties['securitySchemes'] ?? []))
+            ->links(...($properties['links'] ?? []))
+            ->callbacks(...($properties['callbacks'] ?? []));
+    }
 }
diff --git a/src/Objects/Contact.php b/src/Objects/Contact.php
index 3c2fe38..7fbd4d3 100644
--- a/src/Objects/Contact.php
+++ b/src/Objects/Contact.php
@@ -78,4 +78,12 @@ protected function generate(): array
             'email' => $this->email,
         ]);
     }
+    
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->name($properties['name'])
+            ->url($properties['url'])
+            ->email($properties['email']);
+    }
 }
diff --git a/src/Objects/Discriminator.php b/src/Objects/Discriminator.php
index 7e3b117..696db0c 100644
--- a/src/Objects/Discriminator.php
+++ b/src/Objects/Discriminator.php
@@ -69,4 +69,11 @@ protected function generate(): array
             'mapping' => $this->mapping,
         ]);
     }
+    
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->propertyName($properties['propertyName'])
+            ->mapping($properties['mapping']);
+    }
 }
diff --git a/src/Objects/Encoding.php b/src/Objects/Encoding.php
index bb7bc43..18b28c8 100644
--- a/src/Objects/Encoding.php
+++ b/src/Objects/Encoding.php
@@ -123,4 +123,14 @@ protected function generate(): array
             'allowReserved' => $this->allowReserved,
         ]);
     }
+
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->contentType($properties['contentType'])
+            ->headers(...($properties['headers'] ?? []))
+            ->style($properties['style'])
+            ->explode($properties['explode'])
+            ->allowReserved($properties['allowReserved']);
+    }
 }
diff --git a/src/Objects/Example.php b/src/Objects/Example.php
index 0e19d69..82b2467 100644
--- a/src/Objects/Example.php
+++ b/src/Objects/Example.php
@@ -98,4 +98,13 @@ protected function generate(): array
             'externalValue' => $this->externalValue,
         ]);
     }
+    
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->summary($properties['summary'])
+            ->description($properties['description'])
+            ->value($properties['value'])
+            ->externalValue($properties['externalValue']);
+    }
 }
diff --git a/src/Objects/ExternalDocs.php b/src/Objects/ExternalDocs.php
index 6ea983d..cbf64e9 100644
--- a/src/Objects/ExternalDocs.php
+++ b/src/Objects/ExternalDocs.php
@@ -58,4 +58,11 @@ protected function generate(): array
             'url' => $this->url,
         ]);
     }
+
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->description($properties['description'])
+            ->url($properties['url']);
+    }
 }
diff --git a/src/Objects/Header.php b/src/Objects/Header.php
index 7241192..5e5ea20 100644
--- a/src/Objects/Header.php
+++ b/src/Objects/Header.php
@@ -257,4 +257,20 @@ protected function generate(): array
             'content' => $content ?: null,
         ]);
     }
+
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->description($properties['description'])
+            ->required($properties['required'])
+            ->deprecated($properties['deprecated'])
+            ->allowEmptyValue($properties['allowEmptyValue'])
+            ->style($properties['style'])
+            ->explode($properties['explode'])
+            ->allowReserved($properties['allowReserved'])
+            ->schema($properties['schema'])
+            ->example($properties['example'])
+            ->examples(...($properties['examples'] ?? []))
+            ->content(...($properties['content'] ?? []));
+    }
 }
diff --git a/src/Objects/Info.php b/src/Objects/Info.php
index 24e4bc9..b357f67 100644
--- a/src/Objects/Info.php
+++ b/src/Objects/Info.php
@@ -138,4 +138,15 @@ protected function generate(): array
             'version' => $this->version,
         ]);
     }
+    
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->title($properties['title'])
+            ->description($properties['description'])
+            ->termsOfService($properties['termsOfService'])
+            ->contact($properties['contact'])
+            ->license($properties['license'])
+            ->version($properties['version']);
+    }
 }
diff --git a/src/Objects/License.php b/src/Objects/License.php
index 3af1c55..f55fc92 100644
--- a/src/Objects/License.php
+++ b/src/Objects/License.php
@@ -58,4 +58,11 @@ protected function generate(): array
             'url' => $this->url,
         ]);
     }
+
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->name($properties['name'])
+            ->url($properties['url']);
+    }
 }
diff --git a/src/Objects/Link.php b/src/Objects/Link.php
index 5908444..e8d7558 100644
--- a/src/Objects/Link.php
+++ b/src/Objects/Link.php
@@ -98,4 +98,13 @@ protected function generate(): array
             'server' => $this->server,
         ]);
     }
+
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->operationRef($properties['operationRef'])
+            ->operationId($properties['operationId'])
+            ->description($properties['description'])
+            ->server($properties['server']);
+    }
 }
diff --git a/src/Objects/MediaType.php b/src/Objects/MediaType.php
index 5bc8ed7..6f63dac 100644
--- a/src/Objects/MediaType.php
+++ b/src/Objects/MediaType.php
@@ -217,4 +217,14 @@ protected function generate(): array
             'encoding' => $encodings ?: null,
         ]);
     }
+
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->mediaType($properties['mediaType'])
+            ->schema($properties['schema'])
+            ->example($properties['example'])
+            ->examples(...($properties['examples'] ?? []))
+            ->encoding(...($properties['encoding'] ?? []));
+    }
 }
diff --git a/src/Objects/Not.php b/src/Objects/Not.php
index 0651389..a10eb63 100644
--- a/src/Objects/Not.php
+++ b/src/Objects/Not.php
@@ -39,4 +39,10 @@ protected function generate(): array
             'not' => $this->schema,
         ]);
     }
+
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->schema($properties['schema']);
+    }
 }
diff --git a/src/Objects/OAuthFlow.php b/src/Objects/OAuthFlow.php
index 94ebc95..a5b66ce 100644
--- a/src/Objects/OAuthFlow.php
+++ b/src/Objects/OAuthFlow.php
@@ -105,6 +105,14 @@ public function refreshUrl(?string $refreshUrl): self
      */
     public function scopes(?array $scopes): self
     {
+        $instance = clone $this;
+
+        if ($scopes === null) {
+            $instance->scopes = null;
+
+            return $instance;
+        }
+
         // Ensure the scopes are string => string.
         foreach ($scopes as $key => $value) {
             if (is_string($key) && is_string($value)) {
@@ -114,8 +122,6 @@ public function scopes(?array $scopes): self
             throw new InvalidArgumentException('Each scope must have a string key and a string value.');
         }
 
-        $instance = clone $this;
-
         $instance->scopes = $scopes;
 
         return $instance;
@@ -133,4 +139,14 @@ protected function generate(): array
             'scopes' => $this->scopes,
         ]);
     }
+
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->flow($properties['flow'])
+            ->authorizationUrl($properties['authorizationUrl'])
+            ->tokenUrl($properties['tokenUrl'])
+            ->refreshUrl($properties['refreshUrl'])
+            ->scopes($properties['scopes']);
+    }
 }
diff --git a/src/Objects/Operation.php b/src/Objects/Operation.php
index b527493..a80fce8 100644
--- a/src/Objects/Operation.php
+++ b/src/Objects/Operation.php
@@ -400,4 +400,23 @@ protected function generate(): array
             'callbacks' => $callbacks ?: null,
         ]);
     }
+
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->action($properties['action'])
+            ->tags(...($properties['tags'] ?? []))
+            ->summary($properties['summary'])
+            ->description($properties['description'])
+            ->externalDocs($properties['externalDocs'])
+            ->operationId($properties['operationId'])
+            ->parameters(...($properties['parameters'] ?? []))
+            ->requestBody($properties['requestBody'])
+            ->responses(...($properties['responses'] ?? []))
+            ->deprecated($properties['deprecated'])
+            ->security(...($properties['security'] ?? []))
+            ->noSecurity($properties['noSecurity'])
+            ->servers(...($properties['servers'] ?? []))
+            ->callbacks(...($properties['callbacks'] ?? []));
+    }
 }
diff --git a/src/Objects/Parameter.php b/src/Objects/Parameter.php
index 02710ab..ddba9b0 100644
--- a/src/Objects/Parameter.php
+++ b/src/Objects/Parameter.php
@@ -338,4 +338,23 @@ protected function generate(): array
             'content' => $content ?: null,
         ]);
     }
+
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->name($properties['name'])
+            ->in($properties['in'])
+            ->description($properties['description'])
+            ->required($properties['required'])
+            ->deprecated($properties['deprecated'])
+            ->allowEmptyValue($properties['allowEmptyValue'])
+            ->style($properties['style'])
+            ->explode($properties['explode'])
+            ->allowReserved($properties['allowReserved'])
+            ->schema($properties['schema'])
+            ->example($properties['example'])
+            ->examples(...$properties['examples'] ?? [])
+            ->content(...$properties['content'] ?? []);
+
+    }
 }
diff --git a/src/Objects/PathItem.php b/src/Objects/PathItem.php
index 3948b16..2b6e0e6 100644
--- a/src/Objects/PathItem.php
+++ b/src/Objects/PathItem.php
@@ -143,4 +143,15 @@ protected function generate(): array
             ])
         );
     }
+
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->route($properties['route'])
+            ->summary($properties['summary'])
+            ->description($properties['description'])
+            ->operations(...$properties['operations'] ?? [])
+            ->servers(...$properties['servers'] ?? [])
+            ->parameters(...$properties['parameters'] ?? []);
+    }
 }
diff --git a/src/Objects/RequestBody.php b/src/Objects/RequestBody.php
index 8eec78c..cef6c87 100644
--- a/src/Objects/RequestBody.php
+++ b/src/Objects/RequestBody.php
@@ -83,4 +83,12 @@ protected function generate(): array
             'required' => $this->required,
         ]);
     }
+
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->description($properties['description'])
+            ->content(...($properties['content'] ?? []))
+            ->required($properties['required']);
+    }
 }
diff --git a/src/Objects/Response.php b/src/Objects/Response.php
index ff6f98b..e9b9e01 100644
--- a/src/Objects/Response.php
+++ b/src/Objects/Response.php
@@ -253,4 +253,14 @@ protected function generate(): array
             'links' => $links ?: null,
         ]);
     }
+
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->statusCode($properties['statusCode'])
+            ->description($properties['description'])
+            ->headers(...$properties['headers'] ?? [])
+            ->content(...$properties['content'] ?? [])
+            ->links(...$properties['links'] ?? []);
+    }
 }
diff --git a/src/Objects/Schema.php b/src/Objects/Schema.php
index 0fd89da..7439c93 100644
--- a/src/Objects/Schema.php
+++ b/src/Objects/Schema.php
@@ -352,7 +352,7 @@ public function type(?string $type): self
      * @param \GoldSpecDigital\ObjectOrientedOAS\Contracts\SchemaContract $items
      * @return static
      */
-    public function items(SchemaContract $items): self
+    public function items(?SchemaContract $items): self
     {
         $instance = clone $this;
 
@@ -783,4 +783,40 @@ protected function generate(): array
             'deprecated' => $this->deprecated,
         ]);
     }
+
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->title($properties['title'])
+            ->description($properties['description'])
+            ->enum(...($properties['enum'] ?? []))
+            ->default($properties['default'])
+            ->format($properties['format'])
+            ->type($properties['type'])
+            ->items($properties['items'])
+            ->maxItems($properties['maxItems'])
+            ->minItems($properties['minItems'])
+            ->uniqueItems($properties['uniqueItems'])
+            ->pattern($properties['pattern'])
+            ->maxLength($properties['maxLength'])
+            ->minLength($properties['minLength'])
+            ->maximum($properties['maximum'])
+            ->exclusiveMaximum($properties['exclusiveMaximum'])
+            ->minimum($properties['minimum'])
+            ->exclusiveMinimum($properties['exclusiveMinimum'])
+            ->multipleOf($properties['multipleOf'])
+            ->required(...($properties['required'] ?? []))
+            ->properties(...($properties['properties'] ?? []))
+            ->additionalProperties($properties['additionalProperties'])
+            ->maxProperties($properties['maxProperties'])
+            ->minProperties($properties['minProperties'])
+            ->nullable($properties['nullable'])
+            ->discriminator($properties['discriminator'])
+            ->readOnly($properties['readOnly'])
+            ->writeOnly($properties['writeOnly'])
+            ->xml($properties['xml'])
+            ->externalDocs($properties['externalDocs'])
+            ->example($properties['example'])
+            ->deprecated($properties['deprecated']);
+    }
 }
diff --git a/src/Objects/SchemaComposition.php b/src/Objects/SchemaComposition.php
index 8d62a76..d414dc2 100644
--- a/src/Objects/SchemaComposition.php
+++ b/src/Objects/SchemaComposition.php
@@ -44,4 +44,10 @@ protected function generate(): array
             $this->compositionType() => $this->schemas,
         ]);
     }
+
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->schemas(...($properties['schemas'] ?? []));
+    }
 }
diff --git a/src/Objects/SecurityRequirement.php b/src/Objects/SecurityRequirement.php
index e3da7f3..3d7de71 100644
--- a/src/Objects/SecurityRequirement.php
+++ b/src/Objects/SecurityRequirement.php
@@ -74,4 +74,11 @@ protected function generate(): array
             $this->securityScheme => $this->scopes ?? [],
         ]);
     }
+
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->securityScheme($properties['securityScheme'])
+            ->scopes(...($properties['scopes'] ?? []));
+    }
 }
diff --git a/src/Objects/SecurityScheme.php b/src/Objects/SecurityScheme.php
index 0226b94..8199309 100644
--- a/src/Objects/SecurityScheme.php
+++ b/src/Objects/SecurityScheme.php
@@ -201,4 +201,17 @@ protected function generate(): array
             'openIdConnectUrl' => $this->openIdConnectUrl,
         ]);
     }
+
+    public static function __set_state(array $properties): self
+    {
+        return parent::__set_state($properties)
+            ->type($properties['type'])
+            ->description($properties['description'])
+            ->name($properties['name'])
+            ->in($properties['in'])
+            ->scheme($properties['scheme'])
+            ->bearerFormat($properties['bearerFormat'])
+            ->flows(...($properties['flows'] ?? []))
+            ->openIdConnectUrl($properties['openIdConnectUrl']);
+    }
 }
diff --git a/src/Objects/Server.php b/src/Objects/Server.php
index 18b0503..769c799 100644
--- a/src/Objects/Server.php
+++ b/src/Objects/Server.php
@@ -83,4 +83,12 @@ protected function generate(): array
             'variables' => $variables ?: null,
         ]);
     }
+
+    public static function __set_state(array $properties): self
+    {
+        return parent::__set_state($properties)
+            ->url($properties['url'])
+            ->description($properties['description'])
+            ->variables(...($properties['variables'] ?? []));
+    }
 }
diff --git a/src/Objects/ServerVariable.php b/src/Objects/ServerVariable.php
index 7163284..1c0be86 100644
--- a/src/Objects/ServerVariable.php
+++ b/src/Objects/ServerVariable.php
@@ -78,4 +78,12 @@ protected function generate(): array
             'description' => $this->description,
         ]);
     }
+
+    public static function __set_state(array $properties): self
+    {
+        return parent::__set_state($properties)
+            ->enum($properties['enum'])
+            ->default($properties['default'])
+            ->description($properties['description']);
+    }
 }
diff --git a/src/Objects/Tag.php b/src/Objects/Tag.php
index 6b415d1..029745c 100644
--- a/src/Objects/Tag.php
+++ b/src/Objects/Tag.php
@@ -78,4 +78,12 @@ protected function generate(): array
             'externalDocs' => $this->externalDocs,
         ]);
     }
+
+    public static function __set_state(array $properties): self
+    {
+        return parent::__set_state($properties)
+            ->name($properties['name'])
+            ->description($properties['description'])
+            ->externalDocs($properties['externalDocs']);
+    }
 }
diff --git a/src/Objects/Xml.php b/src/Objects/Xml.php
index a6f741a..3d0ff5b 100644
--- a/src/Objects/Xml.php
+++ b/src/Objects/Xml.php
@@ -118,4 +118,14 @@ protected function generate(): array
             'wrapped' => $this->wrapped,
         ]);
     }
+
+    public static function __set_state(array $properties): self
+    {
+        return parent::__set_state($properties)
+            ->name($properties['name'])
+            ->namespace($properties['namespace'])
+            ->prefix($properties['prefix'])
+            ->attribute($properties['attribute'])
+            ->wrapped($properties['wrapped']);
+    }
 }
diff --git a/src/OpenApi.php b/src/OpenApi.php
index cedc15a..7304db0 100644
--- a/src/OpenApi.php
+++ b/src/OpenApi.php
@@ -222,4 +222,17 @@ protected function generate(): array
             'externalDocs' => $this->externalDocs,
         ]);
     }
+    
+    public static function __set_state(array $properties)
+    {
+        return parent::__set_state($properties)
+            ->openapi($properties['openapi'])
+            ->info($properties['info'])
+            ->servers(...($properties['servers'] ?? []))
+            ->paths(...($properties['paths'] ?? []))
+            ->components($properties['components'])
+            ->security(...($properties['security'] ?? []))
+            ->tags(...($properties['tags'] ?? []))
+            ->externalDocs($properties['externalDocs']);
+    }
 }
diff --git a/src/Utilities/Extensions.php b/src/Utilities/Extensions.php
index c04cb17..6d3f2fc 100644
--- a/src/Utilities/Extensions.php
+++ b/src/Utilities/Extensions.php
@@ -105,4 +105,13 @@ protected function normalizeOffset($offset)
 
         return 'x-' . $offset;
     }
+
+    public static function __set_state(array $properties): self
+    {
+        $obj = new self();
+
+        $obj->items = $properties['items'];
+
+        return $obj;
+    }
 }
diff --git a/tests/OpenApiTest.php b/tests/OpenApiTest.php
index 94bb6e2..96cce26 100644
--- a/tests/OpenApiTest.php
+++ b/tests/OpenApiTest.php
@@ -29,6 +29,59 @@ class OpenApiTest extends TestCase
     /** @test */
     public function all_properties_works_and_validation_passes()
     {
+        $openApi = $this->createSchema();
+
+        $exampleResponse = file_get_contents(realpath(__DIR__) . '/storage/example_response.json');
+
+        $this->assertEquals(
+            json_decode($exampleResponse, true),
+            $openApi->toArray()
+        );
+
+        $openApi->validate();
+    }
+
+    /** @test */
+    public function set_state_passes_equality()
+    {
+        $openApi = $this->createSchema();
+
+        $imported = eval('return ' . var_export($openApi, true) . ';');
+
+        $this->assertEquals($openApi, $imported);
+    }
+
+    /** @test */
+    public function validate()
+    {
+        $exceptionThrown = false;
+
+        try {
+            $openApi = OpenApi::create()
+                ->openapi('4.0.0')
+                ->info(
+                    Info::create()->title('foo')
+                )
+                ->paths(
+                    PathItem::create()
+                        ->route('/foo')
+                        ->operations(
+                            Operation::get()
+                        )
+                );
+
+            $openApi->validate();
+        }
+        catch(ValidationException $exception) {
+            $exceptionThrown = true;
+
+            $this->assertCount(3, $exception->getErrors());
+        }
+
+        $this->assertTrue($exceptionThrown);
+    }
+
+    protected function createSchema(): OpenApi {
         // Create a tag.
         $tag = Tag::create()
             ->name('Audits')
@@ -146,7 +199,7 @@ public function all_properties_works_and_validation_passes()
             ->description('GitHub Wiki');
 
         // Create the main OpenAPI object composed off everything created above.
-        $openApi = OpenApi::create()
+        return OpenApi::create()
             ->openapi(OpenApi::OPENAPI_3_0_1)
             ->info($info)
             ->paths(...$paths)
@@ -155,44 +208,5 @@ public function all_properties_works_and_validation_passes()
             ->security($security)
             ->tags($tag)
             ->externalDocs($externalDocs);
-
-        $exampleResponse = file_get_contents(realpath(__DIR__) . '/storage/example_response.json');
-
-        $this->assertEquals(
-            json_decode($exampleResponse, true),
-            $openApi->toArray()
-        );
-
-        $openApi->validate();
-    }
-
-    /** @test */
-    public function validate()
-    {
-        $exceptionThrown = false;
-
-        try {
-            $openApi = OpenApi::create()
-                ->openapi('4.0.0')
-                ->info(
-                    Info::create()->title('foo')
-                )
-                ->paths(
-                    PathItem::create()
-                        ->route('/foo')
-                        ->operations(
-                            Operation::get()
-                        )
-                );
-
-            $openApi->validate();
-        }
-        catch(ValidationException $exception) {
-            $exceptionThrown = true;
-
-            $this->assertCount(3, $exception->getErrors());
-        }
-
-        $this->assertTrue($exceptionThrown);
     }
 }
diff --git a/tests/PetStoreTest.php b/tests/PetStoreTest.php
index fc0c254..2e80592 100644
--- a/tests/PetStoreTest.php
+++ b/tests/PetStoreTest.php
@@ -24,6 +24,27 @@ class PetStoreTest extends TestCase
     /** @test */
     public function pet_store_example()
     {
+        $openApi = $this->createSchema();
+
+        $exampleResponse = file_get_contents(realpath(__DIR__) . '/storage/petstore_expanded.json');
+
+        $this->assertEquals(
+            json_decode($exampleResponse, true),
+            $openApi->toArray()
+        );
+    }
+
+    /** @test */
+    public function set_state_passes_equality()
+    {
+        $openApi = $this->createSchema();
+
+        $imported = eval('return ' . var_export($openApi, true) . ';');
+
+        $this->assertEquals($openApi, $imported);
+    }
+
+    protected function createSchema(): OpenApi {
         $contact = Contact::create()
             ->name('Swagger API Team')
             ->email('apiteam@swagger.io')
@@ -167,18 +188,11 @@ public function pet_store_example()
             ->route('/pets/{id}')
             ->operations($findPetById, $deletePetById);
 
-        $openApi = OpenApi::create()
+        return OpenApi::create()
             ->openapi(OpenApi::OPENAPI_3_0_0)
             ->info($info)
             ->servers($server)
             ->paths($petRoot, $petNested)
             ->components($components);
-
-        $exampleResponse = file_get_contents(realpath(__DIR__) . '/storage/petstore_expanded.json');
-
-        $this->assertEquals(
-            json_decode($exampleResponse, true),
-            $openApi->toArray()
-        );
     }
 }
diff --git a/tests/ReadmeTest.php b/tests/ReadmeTest.php
index 7f353fb..2b38d01 100644
--- a/tests/ReadmeTest.php
+++ b/tests/ReadmeTest.php
@@ -19,52 +19,7 @@ class ReadmeTest extends TestCase
     /** @test */
     public function the_readme_example()
     {
-        // Create a tag for all the user endpoints.
-        $usersTag = Tag::create()
-            ->name('Users')
-            ->description('All user related endpoints');
-
-        // Create the info section.
-        $info = Info::create()
-            ->title('API Specification')
-            ->version('v1')
-            ->description('For using the Example App API');
-
-        // Create the user schema.
-        $userSchema = Schema::object()
-            ->properties(
-                Schema::string('id')->format(Schema::FORMAT_UUID),
-                Schema::string('name'),
-                Schema::integer('age')->example(23),
-                Schema::string('created_at')->format(Schema::FORMAT_DATE_TIME)
-            );
-
-        // Create the user response.
-        $userResponse = Response::create()
-            ->statusCode(200)
-            ->description('OK')
-            ->content(
-                MediaType::json()->schema($userSchema)
-            );
-
-        // Create the operation for the route (i.e. GET, POST, etc.).
-        $showUser = Operation::get()
-            ->responses($userResponse)
-            ->tags($usersTag)
-            ->summary('Get an individual user')
-            ->operationId('users.show');
-
-        // Define the /users path along with the supported operations.
-        $usersPath = PathItem::create()
-            ->route('/users')
-            ->operations($showUser);
-
-        // Create the main OpenAPI object composed off everything created above.
-        $openApi = OpenApi::create()
-            ->openapi(OpenApi::OPENAPI_3_0_1)
-            ->info($info)
-            ->paths($usersPath)
-            ->tags($usersTag);
+        $openApi = $this->createSchema();
 
         $readmeExample = file_get_contents(realpath(__DIR__) . '/storage/readme_example.json');
 
@@ -74,6 +29,16 @@ public function the_readme_example()
         );
     }
 
+    /** @test */
+    public function set_state_passes_equality()
+    {
+        $openApi = $this->createSchema();
+
+        $imported = eval('return ' . var_export($openApi, true) . ';');
+
+        $this->assertEquals($openApi, $imported);
+    }
+
     /** @test */
     public function setting_and_unsetting_properties()
     {
@@ -181,4 +146,53 @@ public function dollar_ref()
             ],
         ], $schema->toArray());
     }
+
+    protected function createSchema(): OpenApi {
+        // Create a tag for all the user endpoints.
+        $usersTag = Tag::create()
+            ->name('Users')
+            ->description('All user related endpoints');
+
+        // Create the info section.
+        $info = Info::create()
+            ->title('API Specification')
+            ->version('v1')
+            ->description('For using the Example App API');
+
+        // Create the user schema.
+        $userSchema = Schema::object()
+            ->properties(
+                Schema::string('id')->format(Schema::FORMAT_UUID),
+                Schema::string('name'),
+                Schema::integer('age')->example(23),
+                Schema::string('created_at')->format(Schema::FORMAT_DATE_TIME)
+            );
+
+        // Create the user response.
+        $userResponse = Response::create()
+            ->statusCode(200)
+            ->description('OK')
+            ->content(
+                MediaType::json()->schema($userSchema)
+            );
+
+        // Create the operation for the route (i.e. GET, POST, etc.).
+        $showUser = Operation::get()
+            ->responses($userResponse)
+            ->tags($usersTag)
+            ->summary('Get an individual user')
+            ->operationId('users.show');
+
+        // Define the /users path along with the supported operations.
+        $usersPath = PathItem::create()
+            ->route('/users')
+            ->operations($showUser);
+
+        // Create the main OpenAPI object composed off everything created above.
+        return OpenApi::create()
+            ->openapi(OpenApi::OPENAPI_3_0_1)
+            ->info($info)
+            ->paths($usersPath)
+            ->tags($usersTag);
+    }
 }