diff --git a/test/bytecode_1.5/test_loops.pyc b/test/bytecode_1.5/test_loops.pyc-notyet
similarity index 100%
rename from test/bytecode_1.5/test_loops.pyc
rename to test/bytecode_1.5/test_loops.pyc-notyet
diff --git a/test/bytecode_2.1/test_loops.pyc b/test/bytecode_2.1/test_loops.pyc-notyet
similarity index 100%
rename from test/bytecode_2.1/test_loops.pyc
rename to test/bytecode_2.1/test_loops.pyc-notyet
diff --git a/test/bytecode_2.3/08_while1_if_continue.pyc b/test/bytecode_2.3/08_while1_if_continue.pyc-notyet
similarity index 100%
rename from test/bytecode_2.3/08_while1_if_continue.pyc
rename to test/bytecode_2.3/08_while1_if_continue.pyc-notyet
diff --git a/test/bytecode_2.6/07_return_end_if.pyc b/test/bytecode_2.6/07_return_end_if.pyc-notyet
similarity index 100%
rename from test/bytecode_2.6/07_return_end_if.pyc
rename to test/bytecode_2.6/07_return_end_if.pyc-notyet
diff --git a/uncompyle6/scanners/scanner2.py b/uncompyle6/scanners/scanner2.py
index 2fb484df..48ccd294 100644
--- a/uncompyle6/scanners/scanner2.py
+++ b/uncompyle6/scanners/scanner2.py
@@ -138,14 +138,21 @@ class Scanner2(Scanner):
         if classname:
             classname = '_' + classname.lstrip('_') + '__'
 
-            free = [ self.unmangle_name(name, classname)
+            if hasattr(co, "co_cellvars"):
+                free = [ self.unmangle_name(name, classname)
                      for name in (co.co_cellvars + co.co_freevars) ]
+            else:
+                free = ()
+
             names = [ self.unmangle_name(name, classname)
                       for name in co.co_names ]
             varnames = [ self.unmangle_name(name, classname)
                          for name in co.co_varnames ]
         else:
-            free = co.co_cellvars + co.co_freevars
+            if hasattr(co, "co_cellvars"):
+                free = co.co_cellvars + co.co_freevars
+            else:
+                free = ()
             names = co.co_names
             varnames = co.co_varnames
         return free, names, varnames