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index 258a1de..87a42e8 100644
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-        "phpstan/phpstan-shim":      "^0.11",
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index d40a9df..e6f3c9f 100644
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@@ -60,6 +60,10 @@
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@@ -192,13 +199,17 @@
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@@ -323,20 +334,24 @@
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@@ -353,6 +368,7 @@
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@@ -400,7 +416,7 @@
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@@ -568,6 +599,10 @@
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@@ -615,20 +650,24 @@
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@@ -704,6 +747,10 @@
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@@ -773,28 +820,29 @@
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@@ -877,6 +929,10 @@
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@@ -924,20 +980,24 @@
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-                "reference": "730ef56164ed6c9356c159e9f5ff2b84d753b9ed",
+                "url": "https://api.github.com/repos/symfony/options-resolver/zipball/c7efc97a47b2ebaabc19d5b6c6b50f5c37c92744",
+                "reference": "c7efc97a47b2ebaabc19d5b6c6b50f5c37c92744",
                 "shasum": ""
             },
             "require": {
                 "php": "^5.5.9|>=7.0.8"
             },
             "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "3.4-dev"
-                }
-            },
             "autoload": {
                 "psr-4": {
                     "Symfony\\Component\\OptionsResolver\\": ""
@@ -2508,24 +2783,41 @@
                 "configuration",
                 "options"
             ],
-            "time": "2020-01-01T11:03:25+00:00"
+            "support": {
+                "source": "https://github.com/symfony/options-resolver/tree/v3.4.46"
+            },
+            "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": "2020-10-24T10:57:07+00:00"
         },
         {
             "name": "symfony/polyfill-ctype",
-            "version": "v1.13.1",
+            "version": "v1.20.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-ctype.git",
-                "reference": "f8f0b461be3385e56d6de3dbb5a0df24c0c275e3"
+                "reference": "f4ba089a5b6366e453971d3aad5fe8e897b37f41"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/f8f0b461be3385e56d6de3dbb5a0df24c0c275e3",
-                "reference": "f8f0b461be3385e56d6de3dbb5a0df24c0c275e3",
+                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/f4ba089a5b6366e453971d3aad5fe8e897b37f41",
+                "reference": "f4ba089a5b6366e453971d3aad5fe8e897b37f41",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.3"
+                "php": ">=7.1"
             },
             "suggest": {
                 "ext-ctype": "For best performance"
@@ -2533,7 +2825,11 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.13-dev"
+                    "dev-main": "1.20-dev"
+                },
+                "thanks": {
+                    "name": "symfony/polyfill",
+                    "url": "https://github.com/symfony/polyfill"
                 }
             },
             "autoload": {
@@ -2566,24 +2862,41 @@
                 "polyfill",
                 "portable"
             ],
-            "time": "2019-11-27T13:56:44+00:00"
+            "support": {
+                "source": "https://github.com/symfony/polyfill-ctype/tree/v1.20.0"
+            },
+            "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": "2020-10-23T14:02:19+00:00"
         },
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.13.1",
+            "version": "v1.20.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-mbstring.git",
-                "reference": "7b4aab9743c30be783b73de055d24a39cf4b954f"
+                "reference": "39d483bdf39be819deabf04ec872eb0b2410b531"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/7b4aab9743c30be783b73de055d24a39cf4b954f",
-                "reference": "7b4aab9743c30be783b73de055d24a39cf4b954f",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/39d483bdf39be819deabf04ec872eb0b2410b531",
+                "reference": "39d483bdf39be819deabf04ec872eb0b2410b531",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.3"
+                "php": ">=7.1"
             },
             "suggest": {
                 "ext-mbstring": "For best performance"
@@ -2591,7 +2904,11 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.13-dev"
+                    "dev-main": "1.20-dev"
+                },
+                "thanks": {
+                    "name": "symfony/polyfill",
+                    "url": "https://github.com/symfony/polyfill"
                 }
             },
             "autoload": {
@@ -2625,31 +2942,43 @@
                 "portable",
                 "shim"
             ],
-            "time": "2019-11-27T14:18:11+00:00"
+            "support": {
+                "source": "https://github.com/symfony/polyfill-mbstring/tree/v1.20.0"
+            },
+            "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": "2020-10-23T14:02:19+00:00"
         },
         {
             "name": "symfony/process",
-            "version": "v3.4.37",
+            "version": "v3.4.46",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/process.git",
-                "reference": "5b9d2bcffe4678911a4c941c00b7c161252cf09a"
+                "reference": "b8648cf1d5af12a44a51d07ef9bf980921f15fca"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/process/zipball/5b9d2bcffe4678911a4c941c00b7c161252cf09a",
-                "reference": "5b9d2bcffe4678911a4c941c00b7c161252cf09a",
+                "url": "https://api.github.com/repos/symfony/process/zipball/b8648cf1d5af12a44a51d07ef9bf980921f15fca",
+                "reference": "b8648cf1d5af12a44a51d07ef9bf980921f15fca",
                 "shasum": ""
             },
             "require": {
                 "php": "^5.5.9|>=7.0.8"
             },
             "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "3.4-dev"
-                }
-            },
             "autoload": {
                 "psr-4": {
                     "Symfony\\Component\\Process\\": ""
@@ -2674,7 +3003,24 @@
             ],
             "description": "Symfony Process Component",
             "homepage": "https://symfony.com",
-            "time": "2020-01-01T11:03:25+00:00"
+            "support": {
+                "source": "https://github.com/symfony/process/tree/v3.4.46"
+            },
+            "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": "2020-10-24T10:57:07+00:00"
         },
         {
             "name": "theseer/tokenizer",
@@ -2714,28 +3060,33 @@
                 }
             ],
             "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
+            "support": {
+                "issues": "https://github.com/theseer/tokenizer/issues",
+                "source": "https://github.com/theseer/tokenizer/tree/master"
+            },
             "time": "2019-06-13T22:48:21+00:00"
         },
         {
             "name": "webmozart/assert",
-            "version": "1.6.0",
+            "version": "1.9.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/webmozart/assert.git",
-                "reference": "573381c0a64f155a0d9a23f4b0c797194805b925"
+                "reference": "bafc69caeb4d49c39fd0779086c03a3738cbb389"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/webmozart/assert/zipball/573381c0a64f155a0d9a23f4b0c797194805b925",
-                "reference": "573381c0a64f155a0d9a23f4b0c797194805b925",
+                "url": "https://api.github.com/repos/webmozart/assert/zipball/bafc69caeb4d49c39fd0779086c03a3738cbb389",
+                "reference": "bafc69caeb4d49c39fd0779086c03a3738cbb389",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.3.3 || ^7.0",
+                "php": "^5.3.3 || ^7.0 || ^8.0",
                 "symfony/polyfill-ctype": "^1.8"
             },
             "conflict": {
-                "vimeo/psalm": "<3.6.0"
+                "phpstan/phpstan": "<0.12.20",
+                "vimeo/psalm": "<3.9.1"
             },
             "require-dev": {
                 "phpunit/phpunit": "^4.8.36 || ^7.5.13"
@@ -2762,7 +3113,11 @@
                 "check",
                 "validate"
             ],
-            "time": "2019-11-24T13:36:37+00:00"
+            "support": {
+                "issues": "https://github.com/webmozart/assert/issues",
+                "source": "https://github.com/webmozart/assert/tree/master"
+            },
+            "time": "2020-07-08T17:02:28+00:00"
         }
     ],
     "aliases": [],
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index ecc38ef..60bec6b 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -9,10 +9,6 @@ parameters:
         - tests
 
     ignoreErrors:
-        -
-            message: '#::__construct\(\) does not call parent constructor from#'
-            path: '*/tests/DoctrineTest/InstantiatorTestAsset/*.php'
-
         # dynamic properties confuse static analysis
         -
             message: '#Access to an undefined property object::\$foo\.#'
diff --git a/src/Doctrine/Instantiator/Exception/InvalidArgumentException.php b/src/Doctrine/Instantiator/Exception/InvalidArgumentException.php
index 9188f0b..20e6a9b 100644
--- a/src/Doctrine/Instantiator/Exception/InvalidArgumentException.php
+++ b/src/Doctrine/Instantiator/Exception/InvalidArgumentException.php
@@ -4,7 +4,6 @@
 
 use InvalidArgumentException as BaseInvalidArgumentException;
 use ReflectionClass;
-use const PHP_VERSION_ID;
 use function interface_exists;
 use function sprintf;
 use function trait_exists;
@@ -20,13 +19,17 @@ public static function fromNonExistingClass(string $className) : self
             return new self(sprintf('The provided type "%s" is an interface, and can not be instantiated', $className));
         }
 
-        if (PHP_VERSION_ID >= 50400 && trait_exists($className)) {
+        if (trait_exists($className)) {
             return new self(sprintf('The provided type "%s" is a trait, and can not be instantiated', $className));
         }
 
         return new self(sprintf('The provided class "%s" does not exist', $className));
     }
 
+    /**
+     * @template T of object
+     * @phpstan-param ReflectionClass<T> $reflectionClass
+     */
     public static function fromAbstractClass(ReflectionClass $reflectionClass) : self
     {
         return new self(sprintf(
diff --git a/src/Doctrine/Instantiator/Exception/UnexpectedValueException.php b/src/Doctrine/Instantiator/Exception/UnexpectedValueException.php
index d946731..00068e6 100644
--- a/src/Doctrine/Instantiator/Exception/UnexpectedValueException.php
+++ b/src/Doctrine/Instantiator/Exception/UnexpectedValueException.php
@@ -12,6 +12,10 @@
  */
 class UnexpectedValueException extends BaseUnexpectedValueException implements ExceptionInterface
 {
+    /**
+     * @template T of object
+     * @phpstan-param ReflectionClass<T> $reflectionClass
+     */
     public static function fromSerializationTriggeredException(
         ReflectionClass $reflectionClass,
         Exception $exception
@@ -26,6 +30,10 @@ public static function fromSerializationTriggeredException(
         );
     }
 
+    /**
+     * @template T of object
+     * @phpstan-param ReflectionClass<T> $reflectionClass
+     */
     public static function fromUncleanUnSerialization(
         ReflectionClass $reflectionClass,
         string $errorString,
diff --git a/src/Doctrine/Instantiator/Instantiator.php b/src/Doctrine/Instantiator/Instantiator.php
index 9c67862..06df8e8 100644
--- a/src/Doctrine/Instantiator/Instantiator.php
+++ b/src/Doctrine/Instantiator/Instantiator.php
@@ -66,6 +66,11 @@ public function instantiate($className)
      * Builds the requested object and caches it in static properties for performance
      *
      * @return object
+     *
+     * @template T of object
+     * @phpstan-param class-string<T> $className
+     *
+     * @phpstan-return T
      */
     private function buildAndCacheFromFactory(string $className)
     {
@@ -86,6 +91,11 @@ private function buildAndCacheFromFactory(string $className)
      * @throws InvalidArgumentException
      * @throws UnexpectedValueException
      * @throws ReflectionException
+     *
+     * @template T of object
+     * @phpstan-param class-string<T> $className
+     *
+     * @phpstan-return callable(): T
      */
     private function buildFactory(string $className) : callable
     {
@@ -112,6 +122,11 @@ private function buildFactory(string $className) : callable
     /**
      * @throws InvalidArgumentException
      * @throws ReflectionException
+     *
+     * @template T of object
+     * @phpstan-param class-string<T> $className
+     *
+     * @phpstan-return ReflectionClass<T>
      */
     private function getReflectionClass(string $className) : ReflectionClass
     {
@@ -130,6 +145,9 @@ private function getReflectionClass(string $className) : ReflectionClass
 
     /**
      * @throws UnexpectedValueException
+     *
+     * @template T of object
+     * @phpstan-param ReflectionClass<T> $reflectionClass
      */
     private function checkIfUnSerializationIsSupported(ReflectionClass $reflectionClass, string $serializedString) : void
     {
@@ -158,6 +176,9 @@ private function checkIfUnSerializationIsSupported(ReflectionClass $reflectionCl
 
     /**
      * @throws UnexpectedValueException
+     *
+     * @template T of object
+     * @phpstan-param ReflectionClass<T> $reflectionClass
      */
     private function attemptInstantiationViaUnSerialization(ReflectionClass $reflectionClass, string $serializedString) : void
     {
@@ -168,6 +189,10 @@ private function attemptInstantiationViaUnSerialization(ReflectionClass $reflect
         }
     }
 
+    /**
+     * @template T of object
+     * @phpstan-param ReflectionClass<T> $reflectionClass
+     */
     private function isInstantiableViaReflection(ReflectionClass $reflectionClass) : bool
     {
         return ! ($this->hasInternalAncestors($reflectionClass) && $reflectionClass->isFinal());
@@ -175,6 +200,9 @@ private function isInstantiableViaReflection(ReflectionClass $reflectionClass) :
 
     /**
      * Verifies whether the given class is to be considered internal
+     *
+     * @template T of object
+     * @phpstan-param ReflectionClass<T> $reflectionClass
      */
     private function hasInternalAncestors(ReflectionClass $reflectionClass) : bool
     {
@@ -193,11 +221,14 @@ private function hasInternalAncestors(ReflectionClass $reflectionClass) : bool
      * Checks if a class is cloneable
      *
      * Classes implementing `__clone` cannot be safely cloned, as that may cause side-effects.
+     *
+     * @template T of object
+     * @phpstan-param ReflectionClass<T> $reflectionClass
      */
-    private function isSafeToClone(ReflectionClass $reflection) : bool
+    private function isSafeToClone(ReflectionClass $reflectionClass) : bool
     {
-        return $reflection->isCloneable()
-            && ! $reflection->hasMethod('__clone')
-            && ! $reflection->isSubclassOf(ArrayIterator::class);
+        return $reflectionClass->isCloneable()
+            && ! $reflectionClass->hasMethod('__clone')
+            && ! $reflectionClass->isSubclassOf(ArrayIterator::class);
     }
 }
diff --git a/src/Doctrine/Instantiator/InstantiatorInterface.php b/src/Doctrine/Instantiator/InstantiatorInterface.php
index 95299f4..3ffff82 100644
--- a/src/Doctrine/Instantiator/InstantiatorInterface.php
+++ b/src/Doctrine/Instantiator/InstantiatorInterface.php
@@ -15,6 +15,9 @@ interface InstantiatorInterface
      * @return object
      *
      * @throws ExceptionInterface
+     *
+     * @template T of object
+     * @phpstan-param class-string<T> $className
      */
     public function instantiate($className);
 }
diff --git a/tests/DoctrineTest/InstantiatorTest/InstantiatorTest.php b/tests/DoctrineTest/InstantiatorTest/InstantiatorTest.php
index 302900c..a3ac1a8 100644
--- a/tests/DoctrineTest/InstantiatorTest/InstantiatorTest.php
+++ b/tests/DoctrineTest/InstantiatorTest/InstantiatorTest.php
@@ -50,6 +50,7 @@ protected function setUp() : void
 
     /**
      * @dataProvider getInstantiableClasses
+     * @phpstan-param class-string $className
      */
     public function testCanInstantiate(string $className) : void
     {
@@ -58,6 +59,7 @@ public function testCanInstantiate(string $className) : void
 
     /**
      * @dataProvider getInstantiableClasses
+     * @phpstan-param class-string $className
      */
     public function testInstantiatesSeparateInstances(string $className) : void
     {
@@ -77,6 +79,7 @@ public function testExceptionOnUnSerializationException() : void
 
     /**
      * @dataProvider getInvalidClassNames
+     * @phpstan-param class-string $invalidClassName
      */
     public function testInstantiationFromNonExistingClass(string $invalidClassName) : void
     {
@@ -91,11 +94,16 @@ public function testInstancesAreNotCloned() : void
 
         eval('namespace ' . __NAMESPACE__ . '; class ' . $className . '{}');
 
-        $instance = $this->instantiator->instantiate(__NAMESPACE__ . '\\' . $className);
+        /**
+         * @phpstan-var class-string
+         */
+        $classNameWithNamespace = __NAMESPACE__ . '\\' . $className;
+
+        $instance = $this->instantiator->instantiate($classNameWithNamespace);
 
         $instance->foo = 'bar';
 
-        $instance2 = $this->instantiator->instantiate(__NAMESPACE__ . '\\' . $className);
+        $instance2 = $this->instantiator->instantiate($classNameWithNamespace);
 
         self::assertObjectNotHasAttribute('foo', $instance2);
     }
@@ -104,6 +112,8 @@ public function testInstancesAreNotCloned() : void
      * Provides a list of instantiable classes (existing)
      *
      * @return string[][]
+     *
+     * @phpstan-return list<array{class-string}>
      */
     public function getInstantiableClasses() : array
     {
diff --git a/tests/DoctrineTest/InstantiatorTestAsset/ArrayObjectAsset.php b/tests/DoctrineTest/InstantiatorTestAsset/ArrayObjectAsset.php
index 16aa44a..8e1fb0c 100644
--- a/tests/DoctrineTest/InstantiatorTestAsset/ArrayObjectAsset.php
+++ b/tests/DoctrineTest/InstantiatorTestAsset/ArrayObjectAsset.php
@@ -7,6 +7,9 @@
 
 /**
  * Test asset that extends an internal PHP class
+ *
+ * @template TValue
+ * @template-extends ArrayObject<int, TValue>
  */
 class ArrayObjectAsset extends ArrayObject
 {
diff --git a/tests/DoctrineTest/InstantiatorTestAsset/SerializableArrayObjectAsset.php b/tests/DoctrineTest/InstantiatorTestAsset/SerializableArrayObjectAsset.php
index 18d419f..edc0fbe 100644
--- a/tests/DoctrineTest/InstantiatorTestAsset/SerializableArrayObjectAsset.php
+++ b/tests/DoctrineTest/InstantiatorTestAsset/SerializableArrayObjectAsset.php
@@ -8,6 +8,9 @@
 
 /**
  * Serializable test asset that also extends an internal class
+ *
+ * @template TValue
+ * @template-extends ArrayObject<int, TValue>
  */
 class SerializableArrayObjectAsset extends ArrayObject implements Serializable
 {
diff --git a/tests/DoctrineTest/InstantiatorTestAsset/SerializableFinalInternalChildAsset.php b/tests/DoctrineTest/InstantiatorTestAsset/SerializableFinalInternalChildAsset.php
index 0ef7452..d4631b3 100644
--- a/tests/DoctrineTest/InstantiatorTestAsset/SerializableFinalInternalChildAsset.php
+++ b/tests/DoctrineTest/InstantiatorTestAsset/SerializableFinalInternalChildAsset.php
@@ -5,6 +5,10 @@
 
 use ArrayIterator;
 
+/**
+ * @template TValue
+ * @template-extends ArrayIterator<int, TValue>
+ */
 final class SerializableFinalInternalChildAsset extends ArrayIterator
 {
 }
diff --git a/tests/DoctrineTest/InstantiatorTestAsset/UnserializeExceptionArrayObjectAsset.php b/tests/DoctrineTest/InstantiatorTestAsset/UnserializeExceptionArrayObjectAsset.php
index a6e2fd5..9d81534 100644
--- a/tests/DoctrineTest/InstantiatorTestAsset/UnserializeExceptionArrayObjectAsset.php
+++ b/tests/DoctrineTest/InstantiatorTestAsset/UnserializeExceptionArrayObjectAsset.php
@@ -7,6 +7,9 @@
 
 /**
  * A simple asset for an abstract class
+ *
+ * @template TValue
+ * @template-extends ArrayObject<int, TValue>
  */
 class UnserializeExceptionArrayObjectAsset extends ArrayObject
 {
diff --git a/tests/DoctrineTest/InstantiatorTestAsset/WakeUpNoticesAsset.php b/tests/DoctrineTest/InstantiatorTestAsset/WakeUpNoticesAsset.php
index 51974c7..fef72b1 100644
--- a/tests/DoctrineTest/InstantiatorTestAsset/WakeUpNoticesAsset.php
+++ b/tests/DoctrineTest/InstantiatorTestAsset/WakeUpNoticesAsset.php
@@ -7,6 +7,9 @@
 
 /**
  * A simple asset for an abstract class
+ *
+ * @template TValue
+ * @template-extends ArrayObject<int, TValue>
  */
 class WakeUpNoticesAsset extends ArrayObject
 {