diff --git a/lib/Doctrine/ODM/MongoDB/DocumentManager.php b/lib/Doctrine/ODM/MongoDB/DocumentManager.php
index 6e22ea9175..428c33b22e 100644
--- a/lib/Doctrine/ODM/MongoDB/DocumentManager.php
+++ b/lib/Doctrine/ODM/MongoDB/DocumentManager.php
@@ -306,14 +306,12 @@ public function getClassNameResolver(): ClassNameResolver
      * @psalm-return ClassMetadata<T>
      *
      * @template T of object
+     *
+     * @psalm-suppress InvalidReturnType, InvalidReturnStatement
      */
     public function getClassMetadata($className): ClassMetadata
     {
-        /** @psalm-var ClassMetadata<T> $metadata */
-        $metadata = $this->metadataFactory->getMetadataFor($className);
-        assert($metadata instanceof ClassMetadata);
-
-        return $metadata;
+        return $this->metadataFactory->getMetadataFor($className);
     }
 
     /**
diff --git a/lib/Doctrine/ODM/MongoDB/UnitOfWork.php b/lib/Doctrine/ODM/MongoDB/UnitOfWork.php
index a9b6a83b98..36dc773036 100644
--- a/lib/Doctrine/ODM/MongoDB/UnitOfWork.php
+++ b/lib/Doctrine/ODM/MongoDB/UnitOfWork.php
@@ -1626,6 +1626,8 @@ public function removeFromIdentityMap(object $document): bool
      * @throws InvalidArgumentException If the class does not have an identifier.
      *
      * @template T of object
+     *
+     * @psalm-suppress InvalidReturnStatement, InvalidReturnType
      */
     public function getById($id, ClassMetadata $class): object
     {
@@ -1653,6 +1655,8 @@ public function getById($id, ClassMetadata $class): object
      * @throws InvalidArgumentException If the class does not have an identifier.
      *
      * @template T of object
+     *
+     * @psalm-suppress InvalidReturnStatement, InvalidReturnType
      */
     public function tryGetById($id, ClassMetadata $class)
     {