diff --git a/cldoc/generators/xml.py b/cldoc/generators/xml.py
index 7e30c8b..3d52df1 100644
--- a/cldoc/generators/xml.py
+++ b/cldoc/generators/xml.py
@@ -33,8 +33,12 @@ def generate(self, outdir):
         except OSError:
             pass
 
-        ElementTree.register_namespace('gobject', 'http://jessevdk.github.com/cldoc/gobject/1.0')
-        ElementTree.register_namespace('cldoc', 'http://jessevdk.github.com/cldoc/1.0')
+        if ElementTree.VERSION[0:3] == '1.2':
+            ElementTree._namespace_map['http://jessevdk.github.com/cldoc/gobject/1.0'] = 'gobject'
+            ElementTree._namespace_map['http://jessevdk.github.com/cldoc/1.0'] = 'cldoc'
+        else:
+            ElementTree.register_namespace('gobject', 'http://jessevdk.github.com/cldoc/gobject/1.0')
+            ElementTree.register_namespace('cldoc', 'http://jessevdk.github.com/cldoc/1.0')
 
         self.index = ElementTree.Element('index')
         self.written = {}
@@ -110,7 +114,10 @@ def write_xml(self, elem, fname):
         self.indent(tree.getroot())
 
         f = fs.fs.open(os.path.join(self.outdir, fname), 'w')
-        tree.write(f, encoding='utf-8', xml_declaration=True)
+        if ElementTree.VERSION[0:3] == '1.2':
+            tree.write(f, encoding='UTF-8')
+        else:
+            tree.write(f, encoding='UTF-8', xml_declaration=True)
         f.write('\n')
 
         f.close()
diff --git a/tests/output/abstract-A.xml b/tests/output/abstract-A.xml
index e5ec2f6..c71036a 100644
--- a/tests/output/abstract-A.xml
+++ b/tests/output/abstract-A.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <class id="A" interface="true" name="A" xmlns="http://jessevdk.github.com/cldoc/1.0">
   <method abstract="yes" id="A::f" name="f" virtual="yes">
     <brief>A function of A.</brief>
diff --git a/tests/output/abstract-index.xml b/tests/output/abstract-index.xml
index 3bb7890..94581f1 100644
--- a/tests/output/abstract-index.xml
+++ b/tests/output/abstract-index.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <index xmlns="http://jessevdk.github.com/cldoc/1.0">
   <class name="A" ref="A#A" />
 </index>
diff --git a/tests/output/base-A.xml b/tests/output/base-A.xml
index 50dd06c..c1c2452 100644
--- a/tests/output/base-A.xml
+++ b/tests/output/base-A.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <class id="A" name="A" xmlns="http://jessevdk.github.com/cldoc/1.0">
   <doc>
 The class A.
diff --git a/tests/output/base-Base.xml b/tests/output/base-Base.xml
index 83017aa..82c2f6d 100644
--- a/tests/output/base-Base.xml
+++ b/tests/output/base-Base.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <class id="Base" interface="true" name="Base" xmlns="http://jessevdk.github.com/cldoc/1.0">
   <subclass access="public" name="A" ref="A#A" />
   <method abstract="yes" id="Base::b" name="b" virtual="yes">
diff --git a/tests/output/base-index.xml b/tests/output/base-index.xml
index 5baae6a..e17c083 100644
--- a/tests/output/base-index.xml
+++ b/tests/output/base-index.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <index xmlns="http://jessevdk.github.com/cldoc/1.0">
   <class name="A" ref="A#A" />
   <class name="Base" ref="Base#Base" />
diff --git a/tests/output/class-A.xml b/tests/output/class-A.xml
index 49395fe..4e9296c 100644
--- a/tests/output/class-A.xml
+++ b/tests/output/class-A.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <class id="A" name="A" xmlns="http://jessevdk.github.com/cldoc/1.0">
   <doc>
 The class A.
diff --git a/tests/output/class-index.xml b/tests/output/class-index.xml
index 3bb7890..94581f1 100644
--- a/tests/output/class-index.xml
+++ b/tests/output/class-index.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <index xmlns="http://jessevdk.github.com/cldoc/1.0">
   <class name="A" ref="A#A" />
 </index>
diff --git a/tests/output/constructor-A.xml b/tests/output/constructor-A.xml
index c3fcd11..ef64508 100644
--- a/tests/output/constructor-A.xml
+++ b/tests/output/constructor-A.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <class id="A" name="A" xmlns="http://jessevdk.github.com/cldoc/1.0">
   <constructor id="A::A" name="A">
     <brief>Constructor.</brief>
diff --git a/tests/output/constructor-index.xml b/tests/output/constructor-index.xml
index 3bb7890..94581f1 100644
--- a/tests/output/constructor-index.xml
+++ b/tests/output/constructor-index.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <index xmlns="http://jessevdk.github.com/cldoc/1.0">
   <class name="A" ref="A#A" />
 </index>
diff --git a/tests/output/cstruct-A.xml b/tests/output/cstruct-A.xml
index ad383e9..2dc6285 100644
--- a/tests/output/cstruct-A.xml
+++ b/tests/output/cstruct-A.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <struct id="A" name="A" typedef="yes" xmlns="http://jessevdk.github.com/cldoc/1.0">
   <field id="A::I" name="I">
     <type builtin="yes" name="int" />
diff --git a/tests/output/cstruct-index.xml b/tests/output/cstruct-index.xml
index 3aaffed..99c7e69 100644
--- a/tests/output/cstruct-index.xml
+++ b/tests/output/cstruct-index.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <index xmlns="http://jessevdk.github.com/cldoc/1.0">
   <struct name="A" ref="A#A" />
 </index>
diff --git a/tests/output/destructor-A.xml b/tests/output/destructor-A.xml
index 4539585..0d73a0a 100644
--- a/tests/output/destructor-A.xml
+++ b/tests/output/destructor-A.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <class id="A" name="A" xmlns="http://jessevdk.github.com/cldoc/1.0">
   <destructor id="A::~A" name="~A">
     <brief>Destructor.</brief>
diff --git a/tests/output/destructor-index.xml b/tests/output/destructor-index.xml
index 3bb7890..94581f1 100644
--- a/tests/output/destructor-index.xml
+++ b/tests/output/destructor-index.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <index xmlns="http://jessevdk.github.com/cldoc/1.0">
   <class name="A" ref="A#A" />
 </index>
diff --git a/tests/output/enum-index.xml b/tests/output/enum-index.xml
index 608dd0f..2556bca 100644
--- a/tests/output/enum-index.xml
+++ b/tests/output/enum-index.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <index xmlns="http://jessevdk.github.com/cldoc/1.0">
   <enum anonymous="yes" id="A" name="A">
     <brief> The enum A.</brief>
diff --git a/tests/output/interface-A.xml b/tests/output/interface-A.xml
index 087f0ef..b86e9f3 100644
--- a/tests/output/interface-A.xml
+++ b/tests/output/interface-A.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <class id="A" interface="true" name="A" xmlns="http://jessevdk.github.com/cldoc/1.0">
   <doc>
 The class A.
diff --git a/tests/output/interface-Impl.xml b/tests/output/interface-Impl.xml
index a987879..fad2d60 100644
--- a/tests/output/interface-Impl.xml
+++ b/tests/output/interface-Impl.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <class id="Impl" name="Impl" xmlns="http://jessevdk.github.com/cldoc/1.0">
   <doc>
 The Impl class.
diff --git a/tests/output/interface-index.xml b/tests/output/interface-index.xml
index f87251d..e9b1c83 100644
--- a/tests/output/interface-index.xml
+++ b/tests/output/interface-index.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <index xmlns="http://jessevdk.github.com/cldoc/1.0">
   <class name="A" ref="A#A" />
   <class name="Impl" ref="Impl#Impl" />
diff --git a/tests/output/method-A.xml b/tests/output/method-A.xml
index 8bffe77..efd60c0 100644
--- a/tests/output/method-A.xml
+++ b/tests/output/method-A.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <class id="A" name="A" xmlns="http://jessevdk.github.com/cldoc/1.0">
   <method id="A::f" name="f">
     <brief>A function of A.</brief>
diff --git a/tests/output/method-index.xml b/tests/output/method-index.xml
index 3bb7890..94581f1 100644
--- a/tests/output/method-index.xml
+++ b/tests/output/method-index.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <index xmlns="http://jessevdk.github.com/cldoc/1.0">
   <class name="A" ref="A#A" />
 </index>
diff --git a/tests/output/namespace-A.xml b/tests/output/namespace-A.xml
index 988ac43..a7342f8 100644
--- a/tests/output/namespace-A.xml
+++ b/tests/output/namespace-A.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <namespace id="A" name="A" xmlns="http://jessevdk.github.com/cldoc/1.0">
   <brief> The namespace A.</brief>
   <doc>Longer description of namespace A.
diff --git a/tests/output/namespace-A::B.xml b/tests/output/namespace-A::B.xml
index 1c3e63e..8b691ee 100644
--- a/tests/output/namespace-A::B.xml
+++ b/tests/output/namespace-A::B.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <class id="A::B" name="B" xmlns="http://jessevdk.github.com/cldoc/1.0">
   <brief>Class B.</brief>
   <doc>Class B in namespace A.
diff --git a/tests/output/namespace-index.xml b/tests/output/namespace-index.xml
index 1aac176..3a4ab4a 100644
--- a/tests/output/namespace-index.xml
+++ b/tests/output/namespace-index.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <index xmlns="http://jessevdk.github.com/cldoc/1.0">
   <namespace name="A" ref="A#A">
     <brief> The namespace A.</brief>
diff --git a/tests/output/operator-N.xml b/tests/output/operator-N.xml
index 6cc24c8..61e1417 100644
--- a/tests/output/operator-N.xml
+++ b/tests/output/operator-N.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <namespace id="N" name="N" xmlns="http://jessevdk.github.com/cldoc/1.0">
   <struct name="A" ref="N::A#N::A" />
 </namespace>
diff --git a/tests/output/operator-N::A.xml b/tests/output/operator-N::A.xml
index 6a47e41..ea3f96e 100644
--- a/tests/output/operator-N::A.xml
+++ b/tests/output/operator-N::A.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <struct id="N::A" interface="true" name="A" xmlns="http://jessevdk.github.com/cldoc/1.0">
   <method abstract="yes" id="N::A::operator&lt;" name="operator&lt;">
     <return>
diff --git a/tests/output/operator-index.xml b/tests/output/operator-index.xml
index bbd9c8b..0804108 100644
--- a/tests/output/operator-index.xml
+++ b/tests/output/operator-index.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <index xmlns="http://jessevdk.github.com/cldoc/1.0">
   <namespace name="N" ref="N#N">
     <struct name="A" ref="N::A#N::A" />
diff --git a/tests/output/struct-A.xml b/tests/output/struct-A.xml
index e0ff8e8..dad6206 100644
--- a/tests/output/struct-A.xml
+++ b/tests/output/struct-A.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <struct id="A" name="A" xmlns="http://jessevdk.github.com/cldoc/1.0">
   <brief> The struct A.</brief>
   <doc>A longer description of A.
diff --git a/tests/output/struct-index.xml b/tests/output/struct-index.xml
index 7b2558e..d8b2d6b 100644
--- a/tests/output/struct-index.xml
+++ b/tests/output/struct-index.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <index xmlns="http://jessevdk.github.com/cldoc/1.0">
   <struct name="A" ref="A#A">
     <brief> The struct A.</brief>
diff --git a/tests/output/template-A.xml b/tests/output/template-A.xml
index 4b89bfa..1f8f716 100644
--- a/tests/output/template-A.xml
+++ b/tests/output/template-A.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <classtemplate id="A" interface="true" name="A" xmlns="http://jessevdk.github.com/cldoc/1.0">
   <brief> The class A.</brief>
   <doc>A longer description of A.
diff --git a/tests/output/template-index.xml b/tests/output/template-index.xml
index 5c1c9e3..4fa7560 100644
--- a/tests/output/template-index.xml
+++ b/tests/output/template-index.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <index xmlns="http://jessevdk.github.com/cldoc/1.0">
   <classtemplate name="A" ref="A#A">
     <brief> The class A.</brief>
diff --git a/tests/output/utf8-A.xml b/tests/output/utf8-A.xml
index 50aaa60..eb85b77 100644
--- a/tests/output/utf8-A.xml
+++ b/tests/output/utf8-A.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <class id="A" name="A" xmlns="http://jessevdk.github.com/cldoc/1.0">
   <brief>Copyright ©</brief>
 </class>
diff --git a/tests/output/utf8-index.xml b/tests/output/utf8-index.xml
index 5520e2f..55875f4 100644
--- a/tests/output/utf8-index.xml
+++ b/tests/output/utf8-index.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <index xmlns="http://jessevdk.github.com/cldoc/1.0">
   <class name="A" ref="A#A">
     <brief>Copyright ©</brief>
diff --git a/tests/output/virtual-A.xml b/tests/output/virtual-A.xml
index 0b617bb..39b9bbb 100644
--- a/tests/output/virtual-A.xml
+++ b/tests/output/virtual-A.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <class id="A" name="A" xmlns="http://jessevdk.github.com/cldoc/1.0">
   <method id="A::f" name="f" virtual="yes">
     <brief>A function of A.</brief>
diff --git a/tests/output/virtual-index.xml b/tests/output/virtual-index.xml
index 3bb7890..94581f1 100644
--- a/tests/output/virtual-index.xml
+++ b/tests/output/virtual-index.xml
@@ -1,4 +1,4 @@
-<?xml version='1.0' encoding='utf-8'?>
+<?xml version='1.0' encoding='UTF-8'?>
 <index xmlns="http://jessevdk.github.com/cldoc/1.0">
   <class name="A" ref="A#A" />
 </index>
diff --git a/tests/regression.py b/tests/regression.py
index ea9ed92..fd410b3 100644
--- a/tests/regression.py
+++ b/tests/regression.py
@@ -5,7 +5,7 @@
 lcldoc = os.path.abspath(os.path.join(os.path.dirname(__file__), '..'))
 sys.path.insert(0, lcldoc)
 
-import unittest
+import unittest2
 from cldoc import cmdgenerate
 
 from cldoc import fs
@@ -15,7 +15,7 @@
 
 fs.fs = fs.Virtual
 
-class Regression(unittest.TestCase):
+class Regression(unittest2.TestCase):
     def setUp(self):
         pass
 
@@ -70,6 +70,6 @@ def generate_tests():
 generate_tests()
 
 if __name__ == '__main__':
-    unittest.main()
+    unittest2.main()
 
 # vi:ts=4:et