diff --git a/README.md b/README.md
index cb55fbc..23b5c9c 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ This _kind of_ works, but with several drawbacks:
 * One would always have to refer to the documentation (if one exists) for the "shape" of the array. This reduces both reusability and productivity. 
 * Static code analysis and IDE auto-completion support are greatly hindered. 
 
-Now imagine instead of using an arbitrary array, we use an object with strongly-typed properties:
+Now imagine instead of using an arbitrary array, we use an object with typed properties:
 
 ```php
 // UserCreationData.php
@@ -68,6 +68,10 @@ composer require eve/dto
 
 This package requires PHP ≥7.4.
 
+### Migrate from v1.x
+
+v1.x versions of this library include a strict type check—for example, assigning a string to a boolean property will throw an error. Though certainly useful, this feature doesn't belong in the scope of a DTO and has been removed from v2. You're encouraged to use a static analysis tool like [PHPStan](https://github.com/phpstan/phpstan) or [Psalm](https://psalm.dev) for the task instead.
+
 ## Usage
 
 ### Basic Usage
@@ -113,11 +117,10 @@ $data = UserCreationData::make()
     ]);
 ```
 
-If any of the passed properties doesn't exist in the class definition or if the types don't match (notice that a non-type public property e.g., `public $whatever` accepts all types), an exception will be thrown:
+If any of the passed properties doesn't exist in the class definition, an exception will be thrown:
 
 ```php
 UserCreationData::make(['nope' => 'bar']); // throws "Public property $nope does not exist in class UserCreationData"
-UserCreationData::make(['email' => new Foo()]); // throws 'UserCreationData::$email must be of type string, received a value of type Foo.',
 ```
 
 Then we can call the `toArray()` method to transform the object into an associative array:
@@ -126,7 +129,7 @@ Then we can call the `toArray()` method to transform the object into an associat
 $arr = $data->toArray(); // ['email' => 'alice@company.tld', 'password' => 'SoSecureWow', 'age' => 30]
 ```
 
-Note that non-set properties will NOT be returned in the output array:
+Note that non-set properties will NOT be included in the output array:
 
 ```php
 $data = UserCreationData::make();
@@ -139,26 +142,6 @@ $arr = $data->toArray(); // ['email' => 'alice@company.tld']
 
 This is especially handy e.g., if you have a method to patch a database record, as it allows the operation to be totally flexible—you can patch all properties or only a subset of them.
 
-### Type Annotations with DocBlock
-
-Instead of declaring your properties with built-in types, you can use type annotations with DockBlock. This is particularly useful if the property accepts multiple types—in fact, it's the only way to declare such in PHP<8. All type restrictions will be respected as normal:
-
-```php
-use Carbon\Carbon;
-
-class NewOrderData extends \Eve\DTO\DataTransferObject 
-{
-    /**
-     * @var string|Carbon
-     */
-    public $order_date;
-}
-
-NewOrderData::make(['order_date' => '2021-01-02 12:34:56']); // works
-NewOrderData::make(['order_date' => Carbon::now()]); // works
-NewOrderData::make(['order_date' => false]); // throws
-```
-
 ### Nested DTOs
 
 Nested DTOs will be transformed into their corresponding arrays:
@@ -223,10 +206,10 @@ $data->toArray(); // ['email' => 'alice@company.tld', 'password' => 'SoSecureWow
 
 ## Differences from spatie/data-transfer-object
 
-eve/dto is inspired by and shares some similarities with [spatie/data-transfer-object](https://github.com/spatie/data-transfer-object) but the two packages have certain differences, the most significant of which are as follows:
+Though eve/dto is inspired by and shares some similarities with [spatie/data-transfer-object](https://github.com/spatie/data-transfer-object), the two packages have certain differences, the most significant of which are as follows:
 
-* spatie/data-transfer-object requires all not-null properties to be supplied right from instantiation. This behavior is not always feasible or desirable (refer to the data patching example above). eve/dto opts for a much more forgiving approach, which allows a DTO to be created with any subset of properties.
-* spatie/data-transfer-object uses a custom RegExp to parse the docblocks. This approach is prone to bugs and has some limitations. For example, the type-hinted class must be an FQCN (Fully Qualified Class Name) i.e. `\App\Models\Author` instead of `Author`. Meanwhile, eve/dto uses the official [ReflectionDocBlock](https://github.com/phpDocumentor/ReflectionDocBlock) and [TypeResolver](https://github.com/phpDocumentor/TypeResolver) packages from phpDocumentor to deal with docblocks and therefore doesn't have these issues.
+* spatie/data-transfer-object requires all not-null properties to be supplied right from instantiation. This behavior is not always feasible or desirable (refer to the data patching example above). eve/dto opts for a much more forgiving approach, which allows a DTO to be created with any subset of properties. 
+* spatie/data-transfer-object can't detect or prevent you from assigning a non-existent property directly (e.g., `$userData->non_existent = 'foo'`), which is something eve/dto does to help ensure your object's integrity.
 * spatie/data-transfer-object implements such features as "Data Transfer Object Collection" and "Flexible Data Transfer Objects." To keep things simple and concise, eve/dto doesn't have these implementations.
 
 ## License
diff --git a/composer.json b/composer.json
index 8a71d84..c7bcdc2 100644
--- a/composer.json
+++ b/composer.json
@@ -3,9 +3,7 @@
     "description": "Simplistic, flexible Data Transfer Object library",
     "type": "library",
     "require": {
-        "php": "^7.4|~8",
-        "phpdocumentor/reflection-docblock": "^5.2",
-        "phpdocumentor/type-resolver": "^1.4"
+        "php": "^7.4|~8"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.5",
diff --git a/composer.lock b/composer.lock
index 89b7700..df45e23 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,304 +4,8 @@
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@@ -579,121 +283,279 @@
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-                "reference": "85265efd3af7ba3ca4b2a2c34dbfc5788dd29133",
+                "url": "https://api.github.com/repos/phpDocumentor/ReflectionDocBlock/zipball/069a785b2141f5bcf49f3e353548dc1cce6df556",
+                "reference": "069a785b2141f5bcf49f3e353548dc1cce6df556",
                 "shasum": ""
             },
             "require": {
-                "ext-dom": "*",
-                "ext-phar": "*",
-                "ext-xmlwriter": "*",
-                "phar-io/version": "^3.0.1",
-                "php": "^7.2 || ^8.0"
+                "ext-filter": "*",
+                "php": "^7.2 || ^8.0",
+                "phpdocumentor/reflection-common": "^2.2",
+                "phpdocumentor/type-resolver": "^1.3",
+                "webmozart/assert": "^1.9.1"
+            },
+            "require-dev": {
+                "mockery/mockery": "~1.3.2"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.0.x-dev"
+                    "dev-master": "5.x-dev"
                 }
             },
             "autoload": {
-                "classmap": [
-                    "src/"
-                ]
+                "psr-4": {
+                    "phpDocumentor\\Reflection\\": "src"
+                }
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
-                "BSD-3-Clause"
+                "MIT"
             ],
             "authors": [
                 {
-                    "name": "Arne Blankerts",
-                    "email": "arne@blankerts.de",
-                    "role": "Developer"
-                },
-                {
-                    "name": "Sebastian Heuer",
-                    "email": "sebastian@phpeople.de",
-                    "role": "Developer"
+                    "name": "Mike van Riel",
+                    "email": "me@mikevanriel.com"
                 },
                 {
-                    "name": "Sebastian Bergmann",
-                    "email": "sebastian@phpunit.de",
-                    "role": "Developer"
+                    "name": "Jaap van Otterdijk",
+                    "email": "account@ijaap.nl"
                 }
             ],
-            "description": "Component for reading phar.io manifest information from a PHP Archive (PHAR)",
+            "description": "With this component, a library can provide support for annotations via DocBlocks or otherwise retrieve information that is embedded in a DocBlock.",
             "support": {
-                "issues": "https://github.com/phar-io/manifest/issues",
-                "source": "https://github.com/phar-io/manifest/tree/master"
+                "issues": "https://github.com/phpDocumentor/ReflectionDocBlock/issues",
+                "source": "https://github.com/phpDocumentor/ReflectionDocBlock/tree/master"
             },
-            "time": "2020-06-27T14:33:11+00:00"
+            "time": "2020-09-03T19:13:55+00:00"
         },
         {
-            "name": "phar-io/version",
-            "version": "3.1.0",
+            "name": "phpdocumentor/type-resolver",
+            "version": "1.4.0",
             "source": {
                 "type": "git",
-                "url": "https://github.com/phar-io/version.git",
-                "reference": "bae7c545bef187884426f042434e561ab1ddb182"
+                "url": "https://github.com/phpDocumentor/TypeResolver.git",
+                "reference": "6a467b8989322d92aa1c8bf2bebcc6e5c2ba55c0"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phar-io/version/zipball/bae7c545bef187884426f042434e561ab1ddb182",
-                "reference": "bae7c545bef187884426f042434e561ab1ddb182",
+                "url": "https://api.github.com/repos/phpDocumentor/TypeResolver/zipball/6a467b8989322d92aa1c8bf2bebcc6e5c2ba55c0",
+                "reference": "6a467b8989322d92aa1c8bf2bebcc6e5c2ba55c0",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.2 || ^8.0"
+                "php": "^7.2 || ^8.0",
+                "phpdocumentor/reflection-common": "^2.0"
+            },
+            "require-dev": {
+                "ext-tokenizer": "*"
             },
             "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-1.x": "1.x-dev"
+                }
+            },
             "autoload": {
-                "classmap": [
-                    "src/"
-                ]
+                "psr-4": {
+                    "phpDocumentor\\Reflection\\": "src"
+                }
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
-                "BSD-3-Clause"
+                "MIT"
             ],
             "authors": [
                 {
-                    "name": "Arne Blankerts",
-                    "email": "arne@blankerts.de",
-                    "role": "Developer"
-                },
-                {
-                    "name": "Sebastian Heuer",
-                    "email": "sebastian@phpeople.de",
-                    "role": "Developer"
-                },
-                {
-                    "name": "Sebastian Bergmann",
-                    "email": "sebastian@phpunit.de",
-                    "role": "Developer"
+                    "name": "Mike van Riel",
+                    "email": "me@mikevanriel.com"
                 }
             ],
-            "description": "Library for handling version information and constraints",
+            "description": "A PSR-5 based resolver of Class names, Types and Structural Element Names",
             "support": {
-                "issues": "https://github.com/phar-io/version/issues",
-                "source": "https://github.com/phar-io/version/tree/3.1.0"
+                "issues": "https://github.com/phpDocumentor/TypeResolver/issues",
+                "source": "https://github.com/phpDocumentor/TypeResolver/tree/1.4.0"
             },
-            "time": "2021-02-23T14:00:09+00:00"
+            "time": "2020-09-17T18:55:26+00:00"
         },
         {
             "name": "phpspec/prophecy",
@@ -2317,6 +2179,85 @@
             },
             "time": "2020-10-23T02:01:07+00:00"
         },
+        {
+            "name": "symfony/polyfill-ctype",
+            "version": "v1.22.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-ctype.git",
+                "reference": "c6c942b1ac76c82448322025e084cadc56048b4e"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/c6c942b1ac76c82448322025e084cadc56048b4e",
+                "reference": "c6c942b1ac76c82448322025e084cadc56048b4e",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.1"
+            },
+            "suggest": {
+                "ext-ctype": "For best performance"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "1.22-dev"
+                },
+                "thanks": {
+                    "name": "symfony/polyfill",
+                    "url": "https://github.com/symfony/polyfill"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Polyfill\\Ctype\\": ""
+                },
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Gert de Pagter",
+                    "email": "BackEndTea@gmail.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill for ctype functions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "ctype",
+                "polyfill",
+                "portable"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/polyfill-ctype/tree/v1.22.1"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2021-01-07T16:49:33+00:00"
+        },
         {
             "name": "theseer/tokenizer",
             "version": "1.2.0",
@@ -2366,6 +2307,64 @@
                 }
             ],
             "time": "2020-07-12T23:59:07+00:00"
+        },
+        {
+            "name": "webmozart/assert",
+            "version": "1.10.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webmozarts/assert.git",
+                "reference": "6964c76c7804814a842473e0c8fd15bab0f18e25"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webmozarts/assert/zipball/6964c76c7804814a842473e0c8fd15bab0f18e25",
+                "reference": "6964c76c7804814a842473e0c8fd15bab0f18e25",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.2 || ^8.0",
+                "symfony/polyfill-ctype": "^1.8"
+            },
+            "conflict": {
+                "phpstan/phpstan": "<0.12.20",
+                "vimeo/psalm": "<4.6.1 || 4.6.2"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^8.5.13"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.10-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\Assert\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "Assertions to validate method input/output with nice error messages.",
+            "keywords": [
+                "assert",
+                "check",
+                "validate"
+            ],
+            "support": {
+                "issues": "https://github.com/webmozarts/assert/issues",
+                "source": "https://github.com/webmozarts/assert/tree/1.10.0"
+            },
+            "time": "2021-03-09T10:59:23+00:00"
         }
     ],
     "aliases": [],
diff --git a/src/DataTransferObject.php b/src/DataTransferObject.php
index bc028fc..687579b 100644
--- a/src/DataTransferObject.php
+++ b/src/DataTransferObject.php
@@ -2,31 +2,19 @@
 
 namespace Eve\DTO;
 
-use phpDocumentor\Reflection\DocBlockFactory;
-use phpDocumentor\Reflection\TypeResolver;
-use phpDocumentor\Reflection\Types\ContextFactory;
 use ReflectionProperty;
 
 abstract class DataTransferObject
 {
     private array $data = [];
-    private array $propertyMap = [];
+    private array $propertyNames = [];
     private array $excludedNames = [];
     private array $onlyNames = [];
 
     private function __construct(array $parameters = [])
     {
         foreach (static::getAssignableProperties() as $property) {
-            $this->propertyMap[$property->getName()] = [
-                'property' => $property,
-                'validator' => new TypeValidator(
-                    DocBlockFactory::createInstance(),
-                    new TypeResolver(),
-                    (new ContextFactory())->createFromReflector(ReflectionResolver::resolve(static::class)),
-                    $property
-                ),
-            ];
-
+            $this->propertyNames[] = $property->getName();
             unset($this->{$property->getName()});
         }
 
@@ -136,7 +124,7 @@ public function compact(): self
 
     private function assertPropertyExists(string $name): void
     {
-        if (!array_key_exists($name, $this->propertyMap)) {
+        if (!in_array($name, $this->propertyNames, true)) {
             throw DataTransferObjectException::nonexistentProperty(static::class, $name);
         }
     }
@@ -144,8 +132,6 @@ private function assertPropertyExists(string $name): void
     public function __set($name, $value): void
     {
         $this->assertPropertyExists($name);
-
-        $this->propertyMap[$name]['validator']->validate($value);
         $this->data[$name] = $value;
     }
 
diff --git a/src/TypeValidator.php b/src/TypeValidator.php
deleted file mode 100644
index 84281c7..0000000
--- a/src/TypeValidator.php
+++ /dev/null
@@ -1,120 +0,0 @@
-<?php
-
-namespace Eve\DTO;
-
-use phpDocumentor\Reflection\DocBlock\Tags\Var_;
-use phpDocumentor\Reflection\DocBlockFactory;
-use phpDocumentor\Reflection\TypeResolver;
-use phpDocumentor\Reflection\Types\Context;
-use ReflectionProperty;
-use ReflectionType;
-
-class TypeValidator
-{
-    private ReflectionProperty $property;
-    private DocBlockFactory $docBlockFactory;
-    private TypeResolver $typeResolver;
-    private Context $context;
-    private array $allowedTypes;
-
-    private const TYPE_ALIASES = [
-        'int' => 'integer',
-        'bool' => 'boolean',
-        'float' => 'double',
-    ];
-
-    public function __construct(
-        DocBlockFactory $docBlockFactory,
-        TypeResolver $typeResolver,
-        Context $context,
-        ReflectionProperty $property
-    ) {
-        $this->docBlockFactory = $docBlockFactory;
-        $this->typeResolver = $typeResolver;
-        $this->context = $context;
-        $this->property = $property;
-
-        $this->allowedTypes = array_unique(
-            array_merge(
-                $this->getNativeTypes($this->property->getType()),
-                $this->getDocBlockTypes()
-            )
-        );
-    }
-
-    public function validate($value): void
-    {
-        if (!$this->allowedTypes) {
-            // an empty array of allowed types means all types are allowed
-            return;
-        }
-
-        $actualType = gettype($value);
-
-        foreach ($this->allowedTypes as $type) {
-            if (strtolower($actualType) === strtolower($type)) {
-                return;
-            }
-
-            if (array_key_exists($type, self::TYPE_ALIASES) && self::TYPE_ALIASES[$type] === $actualType) {
-                return;
-            }
-
-            if ($value instanceof $type) {
-                return;
-            }
-        }
-
-        throw DataTransferObjectException::invalidType(
-            $this->property,
-            $actualType === 'object' ? get_class($value) : $actualType,
-            $this->allowedTypes
-        );
-    }
-
-    /** @return array<string> */
-    private function getNativeTypes(?ReflectionType $type): array
-    {
-        if (!$type) {
-            return [];
-        }
-
-        if (method_exists($type, 'getName')) {
-            return $type->allowsNull() ? ['NULL', $type->getName()] : [$type->getName()];
-        }
-
-        // @see https://www.php.net/manual/en/reflectionuniontype.gettypes.php
-        if (method_exists($type, 'getTypes')) {
-            $typeNames = [];
-
-            foreach ($type->getTypes() as $subType) {
-                $typeNames = array_merge($typeNames, $this->getNativeTypes($subType));
-            }
-
-            return $typeNames;
-        }
-
-        return [];
-    }
-
-    /** @return array<string> */
-    private function getDocBlockTypes(): array
-    {
-        if (!$this->property->getDocComment()) {
-            return [];
-        }
-
-        $types = [];
-
-        $docBlock = $this->docBlockFactory->create($this->property);
-
-        /** @var Var_ $tag */
-        foreach ($docBlock->getTagsByName('var') as $tag) {
-            foreach ($tag->getType() as $type) {
-                $types[] = (string) $this->typeResolver->resolve(ltrim($type, '\\'), $this->context);
-            }
-        }
-
-        return $types;
-    }
-}
diff --git a/tests/Fixtures/SampleData.php b/tests/Fixtures/SampleData.php
index 0a9e84c..5711c35 100644
--- a/tests/Fixtures/SampleData.php
+++ b/tests/Fixtures/SampleData.php
@@ -8,23 +8,8 @@ class SampleData extends DataTransferObject
 {
     public string $simple_prop;
     public ?string $nullable_prop;
+    public $mixed_prop;
     public array $array_prop;
     public Foo $object_prop;
-
-    public $mixed_prop;
-
-    public int $alias_prop_int;
-    public bool $alias_prop_bool;
-    public float $alias_prop_float;
-
-    /** @var Foo|string */
-    public string $union_prop;
-
-    /** @var string|null */
-    public $nullable_doctype_prop;
-
-    /** @var Boolean|Int|String */
-    public $mixed_case_type_prop;
-
     public NestedData $nested;
 }
diff --git a/tests/Fixtures/SampleData8.php b/tests/Fixtures/SampleData8.php
deleted file mode 100644
index 473b37a..0000000
--- a/tests/Fixtures/SampleData8.php
+++ /dev/null
@@ -1,10 +0,0 @@
-<?php
-
-namespace Tests\Fixtures;
-
-use Eve\DTO\DataTransferObject;
-
-class SampleData8 extends DataTransferObject
-{
-    public string | int $compound_property;
-}
diff --git a/tests/Unit/DataTransferObject8Test.php b/tests/Unit/DataTransferObject8Test.php
deleted file mode 100644
index e433504..0000000
--- a/tests/Unit/DataTransferObject8Test.php
+++ /dev/null
@@ -1,26 +0,0 @@
-<?php
-
-namespace Tests\Unit;
-
-use Eve\DTO\DataTransferObjectException;
-use PHPUnit\Framework\TestCase;
-use Tests\Fixtures\SampleData8;
-
-class DataTransferObject8Test extends TestCase
-{
-    public function testPhp8Support(): void
-    {
-        if (PHP_VERSION_ID < 80000) {
-            self::markTestSkipped();
-        }
-
-        $data = SampleData8::make(['compound_property' => 'Bob']);
-        self::assertSame(['compound_property' => 'Bob'], $data->toArray());
-
-        $data = SampleData8::make(['compound_property' => 10]);
-        self::assertSame(['compound_property' => 10], $data->toArray());
-
-        self::expectException(DataTransferObjectException::class);
-        SampleData8::make(['compound_property' => false]);
-    }
-}
diff --git a/tests/Unit/DataTransferObjectTest.php b/tests/Unit/DataTransferObjectTest.php
index 01fcc6f..5eec429 100644
--- a/tests/Unit/DataTransferObjectTest.php
+++ b/tests/Unit/DataTransferObjectTest.php
@@ -39,97 +39,6 @@ public function testObjectProperty(): void
         self::assertEquals(['object_prop' => $foo], $data->toArray());
     }
 
-    /** @return array<mixed> */
-    public function provideMixedTypedProperty(): array
-    {
-        return [
-            [null],
-            ['foo'],
-            [true],
-            [new Foo()],
-        ];
-    }
-
-    /** @dataProvider provideMixedTypedProperty */
-    public function testMixedPropertyCanBeAnything($value): void
-    {
-        $data = SampleData::make();
-        $data->mixed_prop = $value;
-
-        self::assertEquals(['mixed_prop' => $value], $data->toArray());
-    }
-
-    /** @return array<mixed> */
-    public function provideAliasedTypedProperty(): array
-    {
-        return [
-            'int/integer' => ['int', 10],
-            'bool/boolean' => ['bool', true],
-            'float/double' => ['float', 10.0],
-        ];
-    }
-
-    /** @dataProvider provideAliasedTypedProperty */
-    public function testAliasTypedProperty(string $type, $value): void
-    {
-        $propName = "alias_prop_$type";
-        $data = SampleData::make();
-        $data->{$propName} = $value;
-
-        self::assertEquals([$propName => $value], $data->toArray());
-    }
-
-    /** @return array<mixed> */
-    public function provideUnionTypedProperty(): array
-    {
-        return [
-            'string' => ['foo'],
-            'Foo object' => [new Foo()],
-        ];
-    }
-
-    /** @dataProvider provideUnionTypedProperty */
-    public function testUnionProperty($value): void
-    {
-        $data = SampleData::make();
-        $data->union_prop = $value;
-
-        self::assertEquals(['union_prop' => $value], $data->toArray());
-    }
-
-    public function testNullableTypeViaDocBlockProperty(): void
-    {
-        $data = SampleData::make(['nullable_doctype_prop' => null]);
-
-        self::assertEquals(['nullable_doctype_prop' => null], $data->toArray());
-    }
-
-    /** @return array<mixed> */
-    public function provideMixedCaseTypeValues(): array
-    {
-        return [
-            [false],
-            [100],
-            ['foo'],
-        ];
-    }
-
-    /** @dataProvider provideMixedCaseTypeValues */
-    public function testMixedCaseTypeDocBlockProperty($value): void
-    {
-        $data = SampleData::make(['mixed_case_type_prop' => $value]);
-
-        self::assertEquals(['mixed_case_type_prop' => $value], $data->toArray());
-    }
-
-    public function testNativeNullablePropertyAcceptsNull(): void
-    {
-        $data = SampleData::make();
-        $data->nullable_prop = null;
-
-        self::assertEquals(['nullable_prop' => null], $data->toArray());
-    }
-
     public function testSettingNonExistentPropertyThrows(): void
     {
         self::expectException(DataTransferObjectException::class);
@@ -138,40 +47,6 @@ public function testSettingNonExistentPropertyThrows(): void
         SampleData::make(['nope' => 'bar']);
     }
 
-    /** @return array<mixed> */
-    public function provideInvalidType(): array
-    {
-        return [
-            [null, 'NULL'],
-            [1, 'integer'],
-            [true, 'boolean'],
-            [1.0, 'double'],
-            [new Foo(), Foo::class],
-        ];
-    }
-
-    /** @dataProvider provideInvalidType */
-    public function testSettingInvalidTypeThrows($value, string $type): void
-    {
-        self::expectException(DataTransferObjectException::class);
-        self::expectExceptionMessage(
-            sprintf(
-                'Tests\Fixtures\SampleData::$simple_prop must be of type string, received a value of type %s.',
-                $type
-            )
-        );
-
-        SampleData::make(['simple_prop' => $value]);
-    }
-
-    public function testSettingInvalidTypeOnUnionTypeThrows(): void
-    {
-        self::expectException(DataTransferObjectException::class);
-        self::expectExceptionMessage('Tests\Fixtures\SampleData::$union_prop must be one of these types: string, \Tests\Fixtures\Foo; received a value of type boolean.'); //@phpcs-ignore
-
-        SampleData::make(['union_prop' => false]);
-    }
-
     public function testSet(): void
     {
         $data = SampleData::make();