diff --git a/fastjsonschema/draft04.py b/fastjsonschema/draft04.py
index c1650dd..3dcb914 100644
--- a/fastjsonschema/draft04.py
+++ b/fastjsonschema/draft04.py
@@ -427,7 +427,7 @@ def generate_items(self):
                                 '{}_item'.format(self._variable),
                                 '{}[{{{}_x}}]'.format(self._variable_name, self._variable),
                             )
-                            if count == 0:
+                            if not count:
                                 self.l('pass')
             else:
                 if items_definition:
@@ -437,7 +437,7 @@ def generate_items(self):
                             '{}_item'.format(self._variable),
                             '{}[{{{}_x}}]'.format(self._variable_name, self._variable),
                         )
-                        if count == 0:
+                        if not count:
                             self.l('pass')
 
     def generate_min_properties(self):
diff --git a/fastjsonschema/draft06.py b/fastjsonschema/draft06.py
index 07f1e04..709570b 100644
--- a/fastjsonschema/draft06.py
+++ b/fastjsonschema/draft06.py
@@ -28,12 +28,12 @@ def __init__(self, definition, resolver=None, formats={}, use_default=True, use_
 
     def _generate_func_code_block(self, definition):
         if isinstance(definition, bool):
-            self.generate_boolean_schema()
+            return self.generate_boolean_schema()
         elif '$ref' in definition:
             # needed because ref overrides any sibling keywords
-            self.generate_ref()
+            return self.generate_ref()
         else:
-            self.run_generate_functions(definition)
+            return self.run_generate_functions(definition)
 
     def generate_boolean_schema(self):
         """