diff --git a/doc/blender_file_format/BlendFileDnaExporter_25.py b/doc/blender_file_format/BlendFileDnaExporter_25.py
index bc5b2e73c7e..a201f618fbb 100755
--- a/doc/blender_file_format/BlendFileDnaExporter_25.py
+++ b/doc/blender_file_format/BlendFileDnaExporter_25.py
@@ -206,13 +206,13 @@ class DNACatalogHTML:
                 <td>${size}</td>
             </tr>"""
         
-        if field.Type.Structure == None or field.Name.IsPointer():
+        if field.Type.Structure is None or field.Name.IsPointer():
 
             # ${reference}
             reference = field.Name.AsReference(parentReference)
 
             # ${struct}
-            if parentReference != None:
+            if parentReference is not None:
                 struct = '<a href="#{0}">{0}</a>'.format(structure.Type.Name)
             else:
                 struct = structure.Type.Name
@@ -240,7 +240,7 @@ class DNACatalogHTML:
             
             structure_field = Template(structure_field_template).substitute(d)
         
-        elif field.Type.Structure != None:
+        elif field.Type.Structure is not None:
             reference = field.Name.AsReference(parentReference)
             structure_field = self.StructureFields(field.Type.Structure, reference, offset) 
 
diff --git a/doc/blender_file_format/BlendFileReader.py b/doc/blender_file_format/BlendFileReader.py
index 313c8c7ff5d..88eb71b3ce2 100644
--- a/doc/blender_file_format/BlendFileReader.py
+++ b/doc/blender_file_format/BlendFileReader.py
@@ -329,7 +329,7 @@ class DNAName:
         self.Name = name
         
     def AsReference(self, parent):
-        if parent == None:
+        if parent is None:
             result = ""
         else:
             result = parent+"."
diff --git a/intern/cycles/app/io_export_cycles_xml.py b/intern/cycles/app/io_export_cycles_xml.py
index 2314d935214..3ba9e201d11 100644
--- a/intern/cycles/app/io_export_cycles_xml.py
+++ b/intern/cycles/app/io_export_cycles_xml.py
@@ -93,7 +93,7 @@ class ExportCyclesXML(bpy.types.Operator, ExportHelper):
 
     @classmethod
     def poll(cls, context):
-        return context.active_object != None
+        return (context.active_object is not None)
 
     def execute(self, context):
         filepath = bpy.path.ensure_ext(self.filepath, ".xml")
diff --git a/release/scripts/startup/bl_ui/properties_data_curve.py b/release/scripts/startup/bl_ui/properties_data_curve.py
index f8e3d48d40c..3aa995353b2 100644
--- a/release/scripts/startup/bl_ui/properties_data_curve.py
+++ b/release/scripts/startup/bl_ui/properties_data_curve.py
@@ -166,7 +166,7 @@ class DATA_PT_geometry_curve(CurveButtonsPanel, Panel):
         col.prop(curve, "bevel_object", text="")
 
         row = col.row()
-        row.active = curve.bevel_object != None
+        row.active = (curve.bevel_object is not None)
         row.prop(curve, "use_fill_caps")
 
 
diff --git a/source/blender/python/rna_dump.py b/source/blender/python/rna_dump.py
index df902886f30..489f011e693 100644
--- a/source/blender/python/rna_dump.py
+++ b/source/blender/python/rna_dump.py
@@ -79,7 +79,7 @@ def seek(r, txt, recurs):
     except:
         keys = None
 
-    if keys != None:
+    if keys is not None:
         if PRINT_DATA:
             print(txt + '.keys() - ' + str(r.keys()))
 
diff --git a/source/tests/bl_mesh_modifiers.py b/source/tests/bl_mesh_modifiers.py
index 917ccbc0d24..0495f5d9f98 100644
--- a/source/tests/bl_mesh_modifiers.py
+++ b/source/tests/bl_mesh_modifiers.py
@@ -74,7 +74,7 @@ def render_gl(context, filepath, shade):
 
 def render_gl_all_modes(context, obj, filepath=""):
 
-    assert(obj != None)
+    assert(obj is not None)
     assert(filepath != "")
 
     scene = context.scene