diff --git a/src/Symfony/Component/Validator/Mapping/Factory/LazyLoadingMetadataFactory.php b/src/Symfony/Component/Validator/Mapping/Factory/LazyLoadingMetadataFactory.php
index 68236fc1eb06..82e1cf6bffd4 100644
--- a/src/Symfony/Component/Validator/Mapping/Factory/LazyLoadingMetadataFactory.php
+++ b/src/Symfony/Component/Validator/Mapping/Factory/LazyLoadingMetadataFactory.php
@@ -101,8 +101,11 @@ public function getMetadataFor($value)
             return $this->loadedClasses[$class];
         }
 
-        if (null !== $this->cache && false !== ($this->loadedClasses[$class] = $this->cache->read($class))) {
-            return $this->loadedClasses[$class];
+        if (null !== $this->cache && false !== ($metadata = $this->cache->read($class))) {
+            // Include constraints from the parent class
+            $this->mergeConstraints($metadata);
+
+            return $this->loadedClasses[$class] = $metadata;
         }
 
         if (!class_exists($class) && !interface_exists($class)) {
@@ -111,6 +114,22 @@ public function getMetadataFor($value)
 
         $metadata = new ClassMetadata($class);
 
+        if (null !== $this->loader) {
+            $this->loader->loadClassMetadata($metadata);
+        }
+
+        if (null !== $this->cache) {
+            $this->cache->write($metadata);
+        }
+
+        // Include constraints from the parent class
+        $this->mergeConstraints($metadata);
+
+        return $this->loadedClasses[$class] = $metadata;
+    }
+
+    private function mergeConstraints(ClassMetadata $metadata)
+    {
         // Include constraints from the parent class
         if ($parent = $metadata->getReflectionClass()->getParentClass()) {
             $metadata->mergeConstraints($this->getMetadataFor($parent->name));
@@ -141,16 +160,6 @@ public function getMetadataFor($value)
             }
             $metadata->mergeConstraints($this->getMetadataFor($interface->name));
         }
-
-        if (null !== $this->loader) {
-            $this->loader->loadClassMetadata($metadata);
-        }
-
-        if (null !== $this->cache) {
-            $this->cache->write($metadata);
-        }
-
-        return $this->loadedClasses[$class] = $metadata;
     }
 
     /**
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/Factory/LazyLoadingMetadataFactoryTest.php b/src/Symfony/Component/Validator/Tests/Mapping/Factory/LazyLoadingMetadataFactoryTest.php
index 1de745518623..7ffb33e8db8f 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/Factory/LazyLoadingMetadataFactoryTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/Factory/LazyLoadingMetadataFactoryTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Validator\Tests\Mapping\Factory;
 
+use Symfony\Component\Validator\Constraints\Callback;
 use Symfony\Component\Validator\Mapping\ClassMetadata;
 use Symfony\Component\Validator\Mapping\Factory\LazyLoadingMetadataFactory;
 use Symfony\Component\Validator\Mapping\Loader\LoaderInterface;
@@ -30,8 +31,8 @@ public function testLoadClassMetadataWithInterface()
         $metadata = $factory->getMetadataFor(self::PARENT_CLASS);
 
         $constraints = array(
-            new ConstraintA(array('groups' => array('Default', 'EntityInterfaceA', 'EntityParent'))),
             new ConstraintA(array('groups' => array('Default', 'EntityParent'))),
+            new ConstraintA(array('groups' => array('Default', 'EntityInterfaceA', 'EntityParent'))),
         );
 
         $this->assertEquals($constraints, $metadata->getConstraints());
@@ -45,8 +46,6 @@ public function testMergeParentConstraints()
         $constraints = array(
             new ConstraintA(array('groups' => array(
                 'Default',
-                'EntityInterfaceA',
-                'EntityParent',
                 'Entity',
             ))),
             new ConstraintA(array('groups' => array(
@@ -56,8 +55,8 @@ public function testMergeParentConstraints()
             ))),
             new ConstraintA(array('groups' => array(
                 'Default',
-                'EntityParentInterface',
-                'EntityInterfaceB',
+                'EntityInterfaceA',
+                'EntityParent',
                 'Entity',
             ))),
             new ConstraintA(array('groups' => array(
@@ -67,6 +66,8 @@ public function testMergeParentConstraints()
             ))),
             new ConstraintA(array('groups' => array(
                 'Default',
+                'EntityParentInterface',
+                'EntityInterfaceB',
                 'Entity',
             ))),
         );
@@ -80,8 +81,8 @@ public function testWriteMetadataToCache()
         $factory = new LazyLoadingMetadataFactory(new TestLoader(), $cache);
 
         $parentClassConstraints = array(
-            new ConstraintA(array('groups' => array('Default', 'EntityInterfaceA', 'EntityParent'))),
             new ConstraintA(array('groups' => array('Default', 'EntityParent'))),
+            new ConstraintA(array('groups' => array('Default', 'EntityInterfaceA', 'EntityParent'))),
         );
         $interfaceAConstraints = array(
             new ConstraintA(array('groups' => array('Default', 'EntityInterfaceA'))),
@@ -122,17 +123,51 @@ public function testReadMetadataFromCache()
         $metadata = new ClassMetadata(self::PARENT_CLASS);
         $metadata->addConstraint(new ConstraintA());
 
+        $parentClass = self::PARENT_CLASS;
+        $interfaceClass = self::INTERFACE_A_CLASS;
+
         $loader->expects($this->never())
                ->method('loadClassMetadata');
 
         $cache->expects($this->never())
               ->method('has');
-        $cache->expects($this->once())
+        $cache->expects($this->exactly(2))
               ->method('read')
-              ->will($this->returnValue($metadata));
+              ->withConsecutive(
+                  array(self::PARENT_CLASS),
+                  array(self::INTERFACE_A_CLASS)
+              )
+              ->willReturnCallback(function ($name) use ($metadata, $parentClass, $interfaceClass) {
+                  if ($parentClass == $name) {
+                      return $metadata;
+                  }
+
+                  return new ClassMetadata($interfaceClass);
+              });
 
         $this->assertEquals($metadata, $factory->getMetadataFor(self::PARENT_CLASS));
     }
+
+    public function testMetadataCacheWithRuntimeConstraint()
+    {
+        $cache = $this->getMock('Symfony\Component\Validator\Mapping\Cache\CacheInterface');
+        $factory = new LazyLoadingMetadataFactory(new TestLoader(), $cache);
+
+        $cache
+            ->expects($this->any())
+            ->method('write')
+            ->will($this->returnCallback(function ($metadata) { serialize($metadata); }))
+        ;
+
+        $cache->expects($this->any())
+            ->method('read')
+            ->will($this->returnValue(false));
+
+        $metadata = $factory->getMetadataFor(self::PARENT_CLASS);
+        $metadata->addConstraint(new Callback(function () {}));
+
+        $metadata = $factory->getMetadataFor(self::CLASS_NAME);
+    }
 }
 
 class TestLoader implements LoaderInterface