diff --git a/lib/Doctrine/ORM/Configuration.php b/lib/Doctrine/ORM/Configuration.php
index c4a05efcd47..22651ef6ff3 100644
--- a/lib/Doctrine/ORM/Configuration.php
+++ b/lib/Doctrine/ORM/Configuration.php
@@ -26,6 +26,8 @@
 use Doctrine\ORM\Exception\ProxyClassesAlwaysRegenerating;
 use Doctrine\ORM\Exception\UnknownEntityNamespace;
 use Doctrine\ORM\Internal\Hydration\AbstractHydrator;
+use Doctrine\ORM\Internal\Hydration\DefaultHydratorFactory;
+use Doctrine\ORM\Internal\Hydration\HydratorFactory;
 use Doctrine\ORM\Mapping\ClassMetadataFactory;
 use Doctrine\ORM\Mapping\DefaultEntityListenerResolver;
 use Doctrine\ORM\Mapping\DefaultNamingStrategy;
@@ -64,6 +66,16 @@ class Configuration extends \Doctrine\DBAL\Configuration
     /** @var mixed[] */
     protected $_attributes = [];
 
+    public function setHydratorFactory(HydratorFactory $factory): void
+    {
+        $this->_attributes['hydratorFactory'] = $factory;
+    }
+
+    public function getHydratorFactory(): HydratorFactory
+    {
+        return $this->_attributes['hydratorFactory'] ?? new DefaultHydratorFactory();
+    }
+
     /**
      * Sets the directory where Doctrine generates any necessary proxy class files.
      *
diff --git a/lib/Doctrine/ORM/EntityManager.php b/lib/Doctrine/ORM/EntityManager.php
index 2697a8e88c7..138f4286239 100644
--- a/lib/Doctrine/ORM/EntityManager.php
+++ b/lib/Doctrine/ORM/EntityManager.php
@@ -13,11 +13,11 @@
 use Doctrine\DBAL\LockMode;
 use Doctrine\Deprecations\Deprecation;
 use Doctrine\ORM\Exception\EntityManagerClosed;
-use Doctrine\ORM\Exception\InvalidHydrationMode;
 use Doctrine\ORM\Exception\MismatchedEventManager;
 use Doctrine\ORM\Exception\MissingIdentifierField;
 use Doctrine\ORM\Exception\MissingMappingDriverImplementation;
 use Doctrine\ORM\Exception\UnrecognizedIdentifierFields;
+use Doctrine\ORM\Internal\Hydration\HydratorFactory;
 use Doctrine\ORM\Mapping\ClassMetadata;
 use Doctrine\ORM\Mapping\ClassMetadataFactory;
 use Doctrine\ORM\Proxy\ProxyFactory;
@@ -145,6 +145,13 @@
      */
     private $cache;
 
+    /**
+     * The hydrator factory to use.
+     *
+     * @var HydratorFactory
+     */
+    private $hydratorFactory;
+
     /**
      * Creates a new EntityManager that operates on the given database connection
      * and uses the given Configuration and EventManager implementations.
@@ -162,6 +169,7 @@ protected function __construct(Connection $conn, Configuration $config, EventMan
 
         $this->configureMetadataCache();
 
+        $this->hydratorFactory   = $config->getHydratorFactory();
         $this->repositoryFactory = $config->getRepositoryFactory();
         $this->unitOfWork        = new UnitOfWork($this);
         $this->proxyFactory      = new ProxyFactory(
@@ -856,34 +864,7 @@ public function getHydrator($hydrationMode)
      */
     public function newHydrator($hydrationMode)
     {
-        switch ($hydrationMode) {
-            case Query::HYDRATE_OBJECT:
-                return new Internal\Hydration\ObjectHydrator($this);
-
-            case Query::HYDRATE_ARRAY:
-                return new Internal\Hydration\ArrayHydrator($this);
-
-            case Query::HYDRATE_SCALAR:
-                return new Internal\Hydration\ScalarHydrator($this);
-
-            case Query::HYDRATE_SINGLE_SCALAR:
-                return new Internal\Hydration\SingleScalarHydrator($this);
-
-            case Query::HYDRATE_SIMPLEOBJECT:
-                return new Internal\Hydration\SimpleObjectHydrator($this);
-
-            case Query::HYDRATE_SCALAR_COLUMN:
-                return new Internal\Hydration\ScalarColumnHydrator($this);
-
-            default:
-                $class = $this->config->getCustomHydrationMode($hydrationMode);
-
-                if ($class !== null) {
-                    return new $class($this);
-                }
-        }
-
-        throw InvalidHydrationMode::fromMode((string) $hydrationMode);
+        return $this->hydratorFactory->create($this, $this->config, $hydrationMode);
     }
 
     /**
diff --git a/lib/Doctrine/ORM/Internal/Hydration/DefaultHydratorFactory.php b/lib/Doctrine/ORM/Internal/Hydration/DefaultHydratorFactory.php
new file mode 100644
index 00000000000..7995122e04e
--- /dev/null
+++ b/lib/Doctrine/ORM/Internal/Hydration/DefaultHydratorFactory.php
@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\ORM\Internal\Hydration;
+
+use Doctrine\ORM\AbstractQuery;
+use Doctrine\ORM\Configuration;
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\Exception\InvalidHydrationMode;
+
+final class DefaultHydratorFactory implements HydratorFactory
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function create(EntityManagerInterface $em, Configuration $config, $hydrationMode): AbstractHydrator
+    {
+        switch ($hydrationMode) {
+            case AbstractQuery::HYDRATE_OBJECT:
+                return new ObjectHydrator($em);
+
+            case AbstractQuery::HYDRATE_ARRAY:
+                return new ArrayHydrator($em);
+
+            case AbstractQuery::HYDRATE_SCALAR:
+                return new ScalarHydrator($em);
+
+            case AbstractQuery::HYDRATE_SINGLE_SCALAR:
+                return new SingleScalarHydrator($em);
+
+            case AbstractQuery::HYDRATE_SIMPLEOBJECT:
+                return new SimpleObjectHydrator($em);
+
+            case AbstractQuery::HYDRATE_SCALAR_COLUMN:
+                return new ScalarColumnHydrator($em);
+
+            default:
+                $class = $config->getCustomHydrationMode($hydrationMode);
+
+                if ($class !== null) {
+                    return new $class($em);
+                }
+        }
+
+        throw InvalidHydrationMode::fromMode((string) $hydrationMode);
+    }
+}
diff --git a/lib/Doctrine/ORM/Internal/Hydration/HydratorFactory.php b/lib/Doctrine/ORM/Internal/Hydration/HydratorFactory.php
new file mode 100644
index 00000000000..7ae3e065e0d
--- /dev/null
+++ b/lib/Doctrine/ORM/Internal/Hydration/HydratorFactory.php
@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\ORM\Internal\Hydration;
+
+use Doctrine\ORM\AbstractQuery;
+use Doctrine\ORM\Configuration;
+use Doctrine\ORM\EntityManagerInterface;
+
+interface HydratorFactory
+{
+    /**
+     * Create a new instance for the given hydration mode.
+     *
+     * @param string|int $hydrationMode
+     * @psalm-param string|AbstractQuery::HYDRATE_* $hydrationMode
+     */
+    public function create(EntityManagerInterface $em, Configuration $config, $hydrationMode): AbstractHydrator;
+}
diff --git a/psalm-baseline.xml b/psalm-baseline.xml
index b1052c6f26f..8417559e1c0 100644
--- a/psalm-baseline.xml
+++ b/psalm-baseline.xml
@@ -327,18 +327,20 @@
     <PropertyTypeCoercion occurrences="1">
       <code>new $metadataFactoryClassName()</code>
     </PropertyTypeCoercion>
-    <RedundantCastGivenDocblockType occurrences="1">
-      <code>(string) $hydrationMode</code>
-    </RedundantCastGivenDocblockType>
     <RedundantCondition occurrences="1">
       <code>is_object($connection)</code>
     </RedundantCondition>
     <TypeDoesNotContainType occurrences="1">
       <code>': "' . $connection . '"'</code>
     </TypeDoesNotContainType>
+  </file>
+  <file src="lib/Doctrine/ORM/Internal/Hydration/DefaultHydratorFactory.php">
     <UnsafeInstantiation occurrences="1">
-      <code>new $class($this)</code>
+      <code>new $class($em)</code>
     </UnsafeInstantiation>
+    <RedundantCastGivenDocblockType occurrences="1">
+      <code>(string) $hydrationMode</code>
+    </RedundantCastGivenDocblockType>
   </file>
   <file src="lib/Doctrine/ORM/EntityRepository.php">
     <InvalidReturnStatement occurrences="2">