diff --git a/tests/tests/swfs/avm2/xml_tostring_namespace/Test.as b/tests/tests/swfs/avm2/xml_tostring_namespace/Test.as
new file mode 100644
index 000000000000..8c34ede0bb97
--- /dev/null
+++ b/tests/tests/swfs/avm2/xml_tostring_namespace/Test.as
@@ -0,0 +1,23 @@
+package {
+  import flash.display.Sprite;
+  public class Test extends Sprite { }
+}
+
+var xml = <root xmlns="http://example.com" xmlns:ns1="http://xxx.com/">
+  <ns1:foo xmlns:ns2="http://yyy.com/">
+    <ns2:bar abc="1" ns1:def="2" ns2:ghi="3">bar</ns2:bar>
+  </ns1:foo>
+</root>;
+
+trace("// xml.toXMLString()");
+trace(xml.toXMLString());
+
+trace("// xml.child(0).toXMLString()");
+trace(xml.child(0).toXMLString());
+
+trace("// xml.child(0).child(0).toXMLString()");
+trace(xml.child(0).child(0).toXMLString());
+
+// TODO: Flash invents a prefix ...
+// trace("// xml.child(0).child(0).copy().toXMLString()");
+// trace(xml.child(0).child(0).copy().toXMLString());
diff --git a/tests/tests/swfs/avm2/xml_tostring_namespace/output.txt b/tests/tests/swfs/avm2/xml_tostring_namespace/output.txt
new file mode 100644
index 000000000000..05295022640c
--- /dev/null
+++ b/tests/tests/swfs/avm2/xml_tostring_namespace/output.txt
@@ -0,0 +1,12 @@
+// xml.toXMLString()
+<root xmlns="http://example.com" xmlns:ns1="http://xxx.com/">
+  <ns1:foo xmlns:ns2="http://yyy.com/">
+    <ns2:bar abc="1" ns1:def="2" ns2:ghi="3">bar</ns2:bar>
+  </ns1:foo>
+</root>
+// xml.child(0).toXMLString()
+<ns1:foo xmlns:ns2="http://yyy.com/" xmlns="http://example.com" xmlns:ns1="http://xxx.com/">
+  <ns2:bar abc="1" ns1:def="2" ns2:ghi="3">bar</ns2:bar>
+</ns1:foo>
+// xml.child(0).child(0).toXMLString()
+<ns2:bar abc="1" ns1:def="2" ns2:ghi="3" xmlns:ns2="http://yyy.com/" xmlns="http://example.com" xmlns:ns1="http://xxx.com/">bar</ns2:bar>
diff --git a/tests/tests/swfs/avm2/xml_tostring_namespace/test.swf b/tests/tests/swfs/avm2/xml_tostring_namespace/test.swf
new file mode 100644
index 000000000000..6d32974dc3c2
Binary files /dev/null and b/tests/tests/swfs/avm2/xml_tostring_namespace/test.swf differ
diff --git a/tests/tests/swfs/avm2/xml_tostring_namespace/test.toml b/tests/tests/swfs/avm2/xml_tostring_namespace/test.toml
new file mode 100644
index 000000000000..cf6123969a1d
--- /dev/null
+++ b/tests/tests/swfs/avm2/xml_tostring_namespace/test.toml
@@ -0,0 +1 @@
+num_ticks = 1
diff --git a/tests/tests/swfs/from_avmplus/e4x/XML/e13_4_4_39/test.toml b/tests/tests/swfs/from_avmplus/e4x/XML/e13_4_4_39/test.toml
index 29f3cef79022..cf6123969a1d 100644
--- a/tests/tests/swfs/from_avmplus/e4x/XML/e13_4_4_39/test.toml
+++ b/tests/tests/swfs/from_avmplus/e4x/XML/e13_4_4_39/test.toml
@@ -1,2 +1 @@
 num_ticks = 1
-known_failure = true