diff --git a/src/Doctrine/Instantiator/Instantiator.php b/src/Doctrine/Instantiator/Instantiator.php
index ee4803c..330d331 100644
--- a/src/Doctrine/Instantiator/Instantiator.php
+++ b/src/Doctrine/Instantiator/Instantiator.php
@@ -3,6 +3,7 @@
 namespace Doctrine\Instantiator;
 
 use ArrayIterator;
+use Doctrine\Instantiator\Exception\ExceptionInterface;
 use Doctrine\Instantiator\Exception\InvalidArgumentException;
 use Doctrine\Instantiator\Exception\UnexpectedValueException;
 use Exception;
@@ -43,12 +44,26 @@ final class Instantiator implements InstantiatorInterface
     private static $cachedCloneables = [];
 
     /**
-     * {@inheritDoc}
+     * @param string $className
+     *
+     * @return object
+     *
+     * @throws ExceptionInterface
+     *
+     * @template T of object
+     * @phpstan-param class-string<T> $className
+     *
+     * @phpstan-return T
      */
     public function instantiate($className)
     {
         if (isset(self::$cachedCloneables[$className])) {
-            return clone self::$cachedCloneables[$className];
+            /**
+             * @phpstan-var T
+             */
+            $cachedCloneable = self::$cachedCloneables[$className];
+
+            return clone $cachedCloneable;
         }
 
         if (isset(self::$cachedInstantiators[$className])) {
diff --git a/src/Doctrine/Instantiator/InstantiatorInterface.php b/src/Doctrine/Instantiator/InstantiatorInterface.php
index 3ffff82..39a4581 100644
--- a/src/Doctrine/Instantiator/InstantiatorInterface.php
+++ b/src/Doctrine/Instantiator/InstantiatorInterface.php
@@ -18,6 +18,8 @@ interface InstantiatorInterface
      *
      * @template T of object
      * @phpstan-param class-string<T> $className
+     *
+     * @phpstan-return T
      */
     public function instantiate($className);
 }
diff --git a/tests/DoctrineTest/InstantiatorTest/Exception/InvalidArgumentExceptionTest.php b/tests/DoctrineTest/InstantiatorTest/Exception/InvalidArgumentExceptionTest.php
index 518c4e2..5292074 100644
--- a/tests/DoctrineTest/InstantiatorTest/Exception/InvalidArgumentExceptionTest.php
+++ b/tests/DoctrineTest/InstantiatorTest/Exception/InvalidArgumentExceptionTest.php
@@ -25,7 +25,6 @@ public function testFromNonExistingTypeWithNonExistingClass(): void
         $className = self::class . str_replace('.', '', uniqid('', true));
         $exception = InvalidArgumentException::fromNonExistingClass($className);
 
-        self::assertInstanceOf(InvalidArgumentException::class, $exception);
         self::assertSame('The provided class "' . $className . '" does not exist', $exception->getMessage());
     }
 
diff --git a/tests/DoctrineTest/InstantiatorTest/Exception/UnexpectedValueExceptionTest.php b/tests/DoctrineTest/InstantiatorTest/Exception/UnexpectedValueExceptionTest.php
index 013b909..b64fdd2 100644
--- a/tests/DoctrineTest/InstantiatorTest/Exception/UnexpectedValueExceptionTest.php
+++ b/tests/DoctrineTest/InstantiatorTest/Exception/UnexpectedValueExceptionTest.php
@@ -23,7 +23,6 @@ public function testFromSerializationTriggeredException(): void
         $previous        = new Exception();
         $exception       = UnexpectedValueException::fromSerializationTriggeredException($reflectionClass, $previous);
 
-        self::assertInstanceOf(UnexpectedValueException::class, $exception);
         self::assertSame($previous, $exception->getPrevious());
         self::assertSame(
             'An exception was raised while trying to instantiate an instance of "'
@@ -37,7 +36,6 @@ public function testFromUncleanUnSerialization(): void
         $reflection = new ReflectionClass(AbstractClassAsset::class);
         $exception  = UnexpectedValueException::fromUncleanUnSerialization($reflection, 'foo', 123, 'bar', 456);
 
-        self::assertInstanceOf(UnexpectedValueException::class, $exception);
         self::assertSame(
             sprintf(
                 'Could not produce an instance of "%s" '