diff --git a/src/main/java/com/fasterxml/jackson/dataformat/xml/XmlMapper.java b/src/main/java/com/fasterxml/jackson/dataformat/xml/XmlMapper.java
index 192061044..bdfa24e6f 100644
--- a/src/main/java/com/fasterxml/jackson/dataformat/xml/XmlMapper.java
+++ b/src/main/java/com/fasterxml/jackson/dataformat/xml/XmlMapper.java
@@ -10,7 +10,10 @@
 import com.fasterxml.jackson.core.*;
 import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.*;
+import com.fasterxml.jackson.databind.ObjectMapper.DefaultTypeResolverBuilder;
+import com.fasterxml.jackson.databind.ObjectMapper.DefaultTyping;
 import com.fasterxml.jackson.databind.cfg.MapperBuilder;
+import com.fasterxml.jackson.databind.jsontype.TypeResolverBuilder;
 import com.fasterxml.jackson.dataformat.xml.deser.FromXmlParser;
 import com.fasterxml.jackson.dataformat.xml.ser.ToXmlGenerator;
 import com.fasterxml.jackson.dataformat.xml.ser.XmlSerializerProvider;
@@ -185,7 +188,6 @@ public static XmlMapper.Builder xmlBuilder() {
     /**
      * @since 2.10
      */
-    @SuppressWarnings("unchecked")
     public static XmlMapper.Builder builder() {
         return new XmlMapper.Builder(new XmlMapper());
     }
@@ -202,6 +204,19 @@ public Version version() {
         return PackageVersion.VERSION;
     }
 
+    /*
+    /**********************************************************
+    /* Factory method overrides
+    /**********************************************************
+     */
+
+    @Override
+    protected TypeResolverBuilder<?> _constructDefaultTypeResolverBuilder(DefaultTyping applicability) {
+//        return new DefaultTypeResolverBuilder(applicability);
+        // just a stub for now
+        return super._constructDefaultTypeResolverBuilder(applicability);
+    }
+
     /*
     /**********************************************************
     /* Additional XML-specific configurations
diff --git a/src/test/java/com/fasterxml/jackson/dataformat/xml/failing/DefaultTyping325Test.java b/src/test/java/com/fasterxml/jackson/dataformat/xml/failing/DefaultTyping325Test.java
new file mode 100644
index 000000000..e38e33348
--- /dev/null
+++ b/src/test/java/com/fasterxml/jackson/dataformat/xml/failing/DefaultTyping325Test.java
@@ -0,0 +1,36 @@
+package com.fasterxml.jackson.dataformat.xml.failing;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.dataformat.xml.XmlTestBase;
+
+public class DefaultTyping325Test extends XmlTestBase
+{
+    static class Simple {
+        protected List<String> list;
+
+        public List<String> getList( ) { return list; }
+        public void setList(List<String> l) { list = l; }
+    }
+
+    public void testCanSerialize() throws IOException
+    {
+        ObjectMapper mapper = objectMapperBuilder()
+                .build();
+        mapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL, JsonTypeInfo.As.WRAPPER_OBJECT);
+    
+        // construct test object
+        Simple s = new Simple();
+        s.setList(Arrays.asList("foo", "bar"));
+
+        String doc = mapper.writeValueAsString(s);
+System.err.println("DOC: "+doc);        
+        Simple result = mapper.readValue(doc, Simple.class);
+        assertNotNull(result.list);
+        assertEquals(2, result.list.size());
+    }
+}
diff --git a/src/test/java/com/fasterxml/jackson/dataformat/xml/failing/FailingNamespace311Test.java b/src/test/java/com/fasterxml/jackson/dataformat/xml/failing/FailingNamespace311Test.java
new file mode 100644
index 000000000..08747463f
--- /dev/null
+++ b/src/test/java/com/fasterxml/jackson/dataformat/xml/failing/FailingNamespace311Test.java
@@ -0,0 +1,80 @@
+package com.fasterxml.jackson.dataformat.xml.failing;
+
+import javax.xml.stream.*;
+
+import com.ctc.wstx.stax.WstxInputFactory;
+import com.ctc.wstx.stax.WstxOutputFactory;
+import com.fasterxml.jackson.databind.*;
+
+import com.fasterxml.jackson.dataformat.xml.*;
+import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
+import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlRootElement;
+
+// for [dataformat-xml#311]
+public class FailingNamespace311Test extends XmlTestBase
+{
+    @JacksonXmlRootElement(localName = "new")
+    static class Bean {
+        @JacksonXmlProperty(isAttribute = true)
+        public String source="ECOM";
+        public Member member;
+
+        public Bean(int id, String name) {
+            this.member=new Member(id, name);
+        }
+
+        public Member getMember() {
+            return member;
+        }
+    }
+
+    static class Member {
+        private final int id;
+        private final String name;
+
+        public Member(int id, String name) {
+            this.id = id;
+            this.name = name;
+        }
+
+        public int getId() {
+            return id;
+        }
+
+        public String getName() {
+            return name;
+        }
+    }
+
+    public void testIssue311() throws Exception {
+        XMLInputFactory xmlInputFactory = new WstxInputFactory();
+        XMLOutputFactory xmlOutputFactory = new WstxOutputFactory();
+        
+        /* Setting this to true makes the application run but does not write namespace */
+        xmlOutputFactory.setProperty(XMLOutputFactory.IS_REPAIRING_NAMESPACES, false);
+        
+        XmlMapper mapper = new XmlMapper(xmlInputFactory);
+        mapper.enable(SerializationFeature.INDENT_OUTPUT);
+
+        XMLStreamWriter writer = xmlOutputFactory.createXMLStreamWriter(System.out);
+
+        startDocument(writer);
+        Bean bean=new Bean(1, "Dude");
+        mapper.writeValue(writer, bean);
+        endDocument(writer);        
+    }
+
+    protected void startDocument(XMLStreamWriter writer) throws XMLStreamException {
+        writer.writeStartDocument("utf-8", "1.0");
+        writer.writeCharacters("\n");
+        writer.setDefaultNamespace("http://eClub.Schemas.ImportContact");
+        writer.writeStartElement("contacts");
+        writer.writeDefaultNamespace( "http://eClub.Schemas.ImportContact");
+        writer.writeCharacters("\n");
+    }
+
+    protected void endDocument(XMLStreamWriter writer) throws XMLStreamException {
+        writer.writeCharacters("\n");
+        writer.writeEndDocument();
+    }
+}
diff --git a/src/test/java/com/fasterxml/jackson/dataformat/xml/misc/PolymorphicTypesTest.java b/src/test/java/com/fasterxml/jackson/dataformat/xml/misc/PolymorphicTypesTest.java
index ce2a425aa..f7f2b6a36 100644
--- a/src/test/java/com/fasterxml/jackson/dataformat/xml/misc/PolymorphicTypesTest.java
+++ b/src/test/java/com/fasterxml/jackson/dataformat/xml/misc/PolymorphicTypesTest.java
@@ -11,12 +11,6 @@
 
 public class PolymorphicTypesTest extends XmlTestBase
 {
-    /*
-    /**********************************************************
-    /* Helper types
-    /**********************************************************
-     */
-
     @JsonTypeInfo(use=JsonTypeInfo.Id.CLASS, include=JsonTypeInfo.As.PROPERTY)
     static class BaseTypeWithClassProperty { }