diff --git a/mwparserfromhell/nodes/__init__.py b/mwparserfromhell/nodes/__init__.py
index f749e71..94451ab 100644
--- a/mwparserfromhell/nodes/__init__.py
+++ b/mwparserfromhell/nodes/__init__.py
@@ -25,6 +25,9 @@ from ..string_mixin import StringMixIn
 __all__ = ["Node"]
 
 class Node(StringMixIn):
+    def __unicode__(self):
+        raise NotImplementedError()
+
     def __iternodes__(self, getter):
         yield None, self
 
diff --git a/mwparserfromhell/nodes/extras/attribute.py b/mwparserfromhell/nodes/extras/attribute.py
index eb88933..cd128a9 100644
--- a/mwparserfromhell/nodes/extras/attribute.py
+++ b/mwparserfromhell/nodes/extras/attribute.py
@@ -26,6 +26,7 @@ __all__ = ["Attribute"]
 
 class Attribute(StringMixIn):
     def __init__(self, name, value=None, quoted=True):
+        super(Attribute, self).__init__(self)
         self._name = name
         self._value = value
         self._quoted = quoted
diff --git a/mwparserfromhell/nodes/extras/parameter.py b/mwparserfromhell/nodes/extras/parameter.py
index ec39e26..3f15ec6 100644
--- a/mwparserfromhell/nodes/extras/parameter.py
+++ b/mwparserfromhell/nodes/extras/parameter.py
@@ -27,6 +27,7 @@ __all__ = ["Parameter"]
 
 class Parameter(StringMixIn):
     def __init__(self, name, value, showkey=True):
+        super(Parameter, self).__init__(self)
         self._name = name
         self._value = value
         self._showkey = showkey
diff --git a/mwparserfromhell/nodes/heading.py b/mwparserfromhell/nodes/heading.py
index ee10a9f..c2bd5a7 100644
--- a/mwparserfromhell/nodes/heading.py
+++ b/mwparserfromhell/nodes/heading.py
@@ -26,6 +26,7 @@ __all__ = ["Heading"]
 
 class Heading(Node):
     def __init__(self, title, level):
+        super(Heading, self).__init__(self)
         self._title = title
         self._level = level
 
diff --git a/mwparserfromhell/nodes/html_entity.py b/mwparserfromhell/nodes/html_entity.py
index af046ea..ee68691 100644
--- a/mwparserfromhell/nodes/html_entity.py
+++ b/mwparserfromhell/nodes/html_entity.py
@@ -28,6 +28,7 @@ __all__ = ["HTMLEntity"]
 
 class HTMLEntity(Node):
     def __init__(self, value, named=None, hexadecimal=False):
+        super(HTMLEntity, self).__init__(self)
         self._value = value
         if named is None:  # Try to guess whether or not the entity is named
             try:
diff --git a/mwparserfromhell/nodes/tag.py b/mwparserfromhell/nodes/tag.py
index d80536b..5d911a8 100644
--- a/mwparserfromhell/nodes/tag.py
+++ b/mwparserfromhell/nodes/tag.py
@@ -69,6 +69,7 @@ class Tag(Node):
 
     def __init__(self, type_, tag, contents, attrs=None, showtag=True,
                  self_closing=False, open_padding=0, close_padding=0):
+        super(Tag, self).__init__(self)
         self._type = type_
         self._tag = tag
         self._contents = contents
diff --git a/mwparserfromhell/nodes/template.py b/mwparserfromhell/nodes/template.py
index 0b65aa7..99315d7 100644
--- a/mwparserfromhell/nodes/template.py
+++ b/mwparserfromhell/nodes/template.py
@@ -33,6 +33,7 @@ FLAGS = re.DOTALL | re.UNICODE
 
 class Template(Node):
     def __init__(self, name, params=None):
+        super(Template, self).__init__(self)
         self._name = name
         if params:
             self._params = params
diff --git a/mwparserfromhell/nodes/text.py b/mwparserfromhell/nodes/text.py
index c403029..82cad96 100644
--- a/mwparserfromhell/nodes/text.py
+++ b/mwparserfromhell/nodes/text.py
@@ -26,6 +26,7 @@ __all__ = ["Text"]
 
 class Text(Node):
     def __init__(self, value):
+        super(Text, self).__init__(self)
         self._value = value
 
     def __unicode__(self):
diff --git a/mwparserfromhell/smart_list.py b/mwparserfromhell/smart_list.py
index 855aaa2..244c9f7 100644
--- a/mwparserfromhell/smart_list.py
+++ b/mwparserfromhell/smart_list.py
@@ -100,7 +100,7 @@ class SmartList(list):
         del self[index]
         return item
 
-    def remove(item):
+    def remove(self, item):
         del self[self.index(item)]
 
     def reverse(self):
diff --git a/mwparserfromhell/wikicode.py b/mwparserfromhell/wikicode.py
index 7680e20..cd38dcf 100644
--- a/mwparserfromhell/wikicode.py
+++ b/mwparserfromhell/wikicode.py
@@ -33,6 +33,7 @@ FLAGS = re.IGNORECASE | re.DOTALL | re.UNICODE
 
 class Wikicode(StringMixIn):
     def __init__(self, nodes):
+        super(Wikicode, self).__init__(self)
         self._nodes = nodes
 
     def __unicode__(self):