diff --git a/ncat/test/toupper.lua b/ncat/test/toupper.lua
index a8ab4e17c..7b9d79a17 100644
--- a/ncat/test/toupper.lua
+++ b/ncat/test/toupper.lua
@@ -2,12 +2,13 @@
 
 while true do
 
-    data = io.stdin:read(1024)
+    data = io.stdin:read(1)
 
     if data == nil then
         break
     end
 
     io.write(data:upper())
+    io.flush()
 
 end