diff --git a/qa/rpc-tests/test_framework/authproxy.py b/qa/rpc-tests/test_framework/authproxy.py
index fba469a0d..cfc254da0 100644
--- a/qa/rpc-tests/test_framework/authproxy.py
+++ b/qa/rpc-tests/test_framework/authproxy.py
@@ -61,7 +61,7 @@ class JSONRPCException(Exception):
 
 def EncodeDecimal(o):
     if isinstance(o, decimal.Decimal):
-        return round(o, 8)
+        return str(o)
     raise TypeError(repr(o) + " is not JSON serializable")
 
 class AuthServiceProxy(object):