diff --git a/Model/ModelRegistry.php b/Model/ModelRegistry.php
index 8926264..db346fb 100644
--- a/Model/ModelRegistry.php
+++ b/Model/ModelRegistry.php
@@ -144,8 +144,8 @@ final class ModelRegistry
                 'built_in_type' => $type->getBuiltinType(),
                 'nullable' => $type->isNullable(),
                 'collection' => $type->isCollection(),
-                'collection_key_types' => $type->isCollection() ? array_map($getType, $type->getCollectionKeyTypes()) : null,
-                'collection_value_types' => $type->isCollection() ? array_map($getType, $type->getCollectionValueTypes()) : null,
+                'collection_key_types' => $type->isCollection() ? array_map($getType, $this->getCollectionKeyTypes($type)) : null,
+                'collection_value_types' => $type->isCollection() ? array_map($getType, $this->getCollectionValueTypes($type)) : null,
             ];
         };
 
@@ -186,6 +186,26 @@ final class ModelRegistry
         }
     }
 
+    private function getCollectionKeyTypes(Type $type): array
+    {
+        // BC layer, this condition should be removed after removing support for symfony < 5.3
+        if (!method_exists($type, 'getCollectionKeyTypes')) {
+            return null !== $type->getCollectionKeyType() ? [$type->getCollectionKeyType()] : [];
+        }
+
+        return $type->getCollectionKeyTypes();
+    }
+
+    private function getCollectionValueTypes(Type $type): array
+    {
+        // BC layer, this condition should be removed after removing support for symfony < 5.3
+        if (!method_exists($type, 'getCollectionValueTypes')) {
+            return null !== $type->getCollectionValueType() ? [$type->getCollectionValueType()] : [];
+        }
+
+        return $type->getCollectionValueTypes();
+    }
+
     private function getCollectionValueType(Type $type): ?Type
     {
         // BC layer, this condition should be removed after removing support for symfony < 5.3
diff --git a/Tests/Model/ModelRegistryTest.php b/Tests/Model/ModelRegistryTest.php
index 66eb16c..ef7fd85 100644
--- a/Tests/Model/ModelRegistryTest.php
+++ b/Tests/Model/ModelRegistryTest.php
@@ -34,7 +34,10 @@ class ModelRegistryTest extends TestCase
         $this->assertEquals('#/components/schemas/array', $registry->register(new Model($type, ['group1'])));
     }
 
-    public function testNameCollisionsAreLogged()
+    /**
+     * @dataProvider provideNameCollisionsTypes
+     */
+    public function testNameCollisionsAreLogged(Type $type, array $arrayType)
     {
         $logger = $this->createMock(LoggerInterface::class);
         $logger
@@ -43,26 +46,12 @@ class ModelRegistryTest extends TestCase
             ->with(
                 'Can not assign a name for the model, the name "ModelRegistryTest" has already been taken.', [
                 'model' => [
-                    'type' => [
-                        'class' => 'Nelmio\\ApiDocBundle\\Tests\\Model\\ModelRegistryTest',
-                        'built_in_type' => 'object',
-                        'nullable' => false,
-                        'collection' => false,
-                        'collection_key_types' => null,
-                        'collection_value_types' => null,
-                    ],
+                    'type' => $arrayType,
                     'options' => null,
                     'groups' => ['group2'],
                 ],
                 'taken_by' => [
-                    'type' => [
-                        'class' => 'Nelmio\\ApiDocBundle\\Tests\\Model\\ModelRegistryTest',
-                        'built_in_type' => 'object',
-                        'nullable' => false,
-                        'collection' => false,
-                        'collection_key_types' => null,
-                        'collection_value_types' => null,
-                    ],
+                    'type' => $arrayType,
                     'options' => null,
                     'groups' => ['group1'],
                 ],
@@ -71,11 +60,46 @@ class ModelRegistryTest extends TestCase
         $registry = new ModelRegistry([], new OA\OpenApi([]), []);
         $registry->setLogger($logger);
 
-        $type = new Type(Type::BUILTIN_TYPE_OBJECT, false, self::class);
         $registry->register(new Model($type, ['group1']));
         $registry->register(new Model($type, ['group2']));
     }
 
+    public function provideNameCollisionsTypes()
+    {
+        yield [
+            new Type(Type::BUILTIN_TYPE_OBJECT, false, self::class),
+            [
+                'class' => 'Nelmio\\ApiDocBundle\\Tests\\Model\\ModelRegistryTest',
+                'built_in_type' => 'object',
+                'nullable' => false,
+                'collection' => false,
+                'collection_key_types' => null,
+                'collection_value_types' => null,
+            ],
+        ];
+
+        yield [
+            new Type(Type::BUILTIN_TYPE_OBJECT, false, self::class, true, new Type(Type::BUILTIN_TYPE_OBJECT)),
+            [
+                'class' => 'Nelmio\\ApiDocBundle\\Tests\\Model\\ModelRegistryTest',
+                'built_in_type' => 'object',
+                'nullable' => false,
+                'collection' => true,
+                'collection_key_types' => [
+                    [
+                        'class' => null,
+                        'built_in_type' => 'object',
+                        'nullable' => false,
+                        'collection' => false,
+                        'collection_key_types' => null,
+                        'collection_value_types' => null,
+                    ],
+                ],
+                'collection_value_types' => [],
+            ],
+        ];
+    }
+
     public function testNameCollisionsAreLoggedWithAlternativeNames()
     {
         $ref = new \ReflectionClass(self::class);