Fix test with ZODB >= 5.6.0

See https://github.com/zopefoundation/ZODB/pull/207

src/ZEO/asyncio/marshal.py

@@ -126,7 +126,10 @@ _silly = ('__doc__',)
 
 exception_type_type = type(Exception)
 
-_SAFE_MODULE_NAMES = ('ZopeUndo.Prefix', 'copy_reg', '__builtin__', 'zodbpickle')
+_SAFE_MODULE_NAMES = (
+    'ZopeUndo.Prefix', 'zodbpickle',
+    'builtins', 'copy_reg', '__builtin__',
+)
 
 def find_global(module, name):
     """Helper for message unpickler"""

src/ZEO/tests/ZEO4/zrpc/marshal.py

@@ -97,7 +97,10 @@ _silly = ('__doc__',)
 
 exception_type_type = type(Exception)
 
-_SAFE_MODULE_NAMES = ('ZopeUndo.Prefix', 'copy_reg', '__builtin__', 'zodbpickle')
+_SAFE_MODULE_NAMES = (
+    'ZopeUndo.Prefix', 'zodbpickle',
+    'builtins', 'copy_reg', '__builtin__',
+)
 
 def find_global(module, name):
     """Helper for message unpickler"""

src/ZEO/tests/testZEO.py

@@ -489,6 +489,8 @@ class FileStorageHexTests(FileStorageTests):
 
 class FileStorageClientHexTests(FileStorageHexTests):
 
+    use_extension_bytes = True
+
     def getConfig(self):
         return """\
         %import ZODB.tests