diff --git a/src/NHibernate.Test/CfgTest/ConfigurationSchemaFixture.cs b/src/NHibernate.Test/CfgTest/ConfigurationSchemaFixture.cs
index f47b851ab70..41ff72660fd 100644
--- a/src/NHibernate.Test/CfgTest/ConfigurationSchemaFixture.cs
+++ b/src/NHibernate.Test/CfgTest/ConfigurationSchemaFixture.cs
@@ -1,6 +1,4 @@
-using System;
 using System.Configuration;
-using System.Reflection;
 using NHibernate.Event;
 using NUnit.Framework;
 using NHibernate.Cfg;
@@ -13,7 +11,7 @@ namespace NHibernate.Test.CfgTest
 	public class ConfigurationSchemaFixture
 	{
 		[Test]
-		public void InvalidConfig()
+		public void SessionFactoryIsRequiredWhenConfigurationIsNotLoadedFromAppConfig()
 		{
 			string xml =
 			@"<?xml version='1.0' encoding='utf-8' ?>
@@ -22,7 +20,7 @@ public void InvalidConfig()
 </hibernate-configuration>";
 
 			XmlTextReader xtr = new XmlTextReader(xml, XmlNodeType.Document, null);
-			Assert.Throws<HibernateConfigException>(()=>new HibernateConfiguration(xtr));
+			Assert.Throws<HibernateConfigException>(() => new HibernateConfiguration(xtr));
 		}
 
 		[Test]
@@ -35,6 +33,23 @@ public void FromAppConfigTest()
 			Assert.IsTrue(hc.UseReflectionOptimizer);
 			Assert.AreEqual("NHibernate.Test", hc.SessionFactory.Name);
 		}
+ 
+		[Test]
+		public void ByteCodeProvider()
+		{
+			Assume.That(TestsContext.ExecutingWithVsTest, Is.False);
+
+			var xml =
+				@"<?xml version='1.0' encoding='utf-8' ?>
+<hibernate-configuration xmlns='urn:nhibernate-configuration-2.2'>
+	<bytecode-provider type='test'/>
+	<session-factory>
+	</session-factory>
+</hibernate-configuration>";
+
+			var hc = HibernateConfiguration.FromAppConfig(xml);
+			Assert.That(hc.ByteCodeProviderType, Is.EqualTo("test"));
+		}
 
 		[Test]
 		public void IgnoreSystemOutOfAppConfig()
diff --git a/src/NHibernate/nhibernate-configuration.xsd b/src/NHibernate/nhibernate-configuration.xsd
index c3b9d1d0fdf..e9096306180 100644
--- a/src/NHibernate/nhibernate-configuration.xsd
+++ b/src/NHibernate/nhibernate-configuration.xsd
@@ -326,10 +326,17 @@
 			</xs:sequence>
 			<xs:attribute name="type" default="lcg">
 				<xs:simpleType>
-					<xs:restriction base="xs:string">
-						<xs:enumeration value="lcg" />
-						<xs:enumeration value="null" />
-					</xs:restriction>
+					<xs:union>
+						<xs:simpleType>
+							<xs:restriction base="xs:string">
+								<xs:enumeration value="lcg" />
+								<xs:enumeration value="null" />
+							</xs:restriction>
+						</xs:simpleType>
+						<xs:simpleType>
+							<xs:restriction base="xs:string" />
+						</xs:simpleType>
+					</xs:union>
 				</xs:simpleType>
 			</xs:attribute>
 		</xs:complexType>