diff --git a/jmbase/jmbase/bigstring.py b/jmbase/jmbase/bigstring.py
index b247baa..6198f8a 100644
--- a/jmbase/jmbase/bigstring.py
+++ b/jmbase/jmbase/bigstring.py
@@ -1,7 +1,7 @@
 try:
     from cStringIO import StringIO
-except ImportError:
-    from StringIO import StringIO
+except ImportError: #pragma: no cover
+    from StringIO import StringIO #pragma: no cover
 from itertools import count
 from twisted.protocols import amp
 
@@ -45,20 +45,3 @@ class BigString(amp.Argument):
 
     def fromvalue(self, value):
         return value
-
-class BigUnicode(BigString):
-    """
-    A unicode-string amp.Argument with no 65,535 length limit.
-
-    Each value for a key/value pair in an AMP box may not
-    exceed 65,535 bytes in length. So if we *really* want to
-    send potentially larger values, this class will implicitly
-    encode/decode them to/from an arbitrary additional
-    number of key/value pairs that are given automatic key
-    names by prefixing this Argument's key name to a counter.
-    """
-    def buildvalue(self, value):
-        return value.decode('utf-8')
-
-    def fromvalue(self, value):
-        return value.encode('utf-8')
\ No newline at end of file
diff --git a/jmbase/test/test_commands.py b/jmbase/test/test_commands.py
index 27b08d9..9fd20e9 100644
--- a/jmbase/test/test_commands.py
+++ b/jmbase/test/test_commands.py
@@ -84,8 +84,10 @@ class JMTestServerProtocol(JMBaseProtocol):
     @JMRequestOffers.responder
     def on_JM_REQUEST_OFFERS(self):
         show_receipt("JMREQUESTOFFERS")
+        #build a huge orderbook to test BigString Argument
+        orderbook = ["aaaa" for _ in range(2**15)]
         d = self.callRemote(JMOffers,
-                        orderbook=json.dumps(["This", "is", "an", "orderbook"]))
+                        orderbook=json.dumps(orderbook))
         self.defaultCallbacks(d)
         return {'accepted': True}