diff --git a/json_rpc/clients/socketclient.nim b/json_rpc/clients/socketclient.nim
index 86bdb5f..d9cd7df 100644
--- a/json_rpc/clients/socketclient.nim
+++ b/json_rpc/clients/socketclient.nim
@@ -22,7 +22,7 @@ proc call*(self: RpcSocketClient, name: string,
                     "Transport is not initialised (missing a call to connect?)")
   let res = await self.transport.write(value)
   # TODO: Add actions when not full packet was send, e.g. disconnect peer.
-  assert(res == len(value))
+  doAssert(res == len(value))
 
   # completed by processMessage.
   var newFut = newFuture[Response]()
diff --git a/tests/debugclient.nim b/tests/debugclient.nim
index 15c5f90..6301f88 100644
--- a/tests/debugclient.nim
+++ b/tests/debugclient.nim
@@ -10,7 +10,7 @@ proc rawCall*(self: RpcClient, name: string,
 
   var s = msg & "\c\l"  
   let res = await self.transport.write(s)
-  assert res == len(s)
+  doAssert res == len(s)
 
   # completed by processMessage.
   var newFut = newFuture[Response]()