diff --git a/loopy/compiled.py b/loopy/compiled.py
index 370573af756e55fe83f84b9aa6f271ff71626308..6a7b275689cfda1c16d2ffe26ef517db40e706b7 100644
--- a/loopy/compiled.py
+++ b/loopy/compiled.py
@@ -247,7 +247,7 @@ def auto_test_vs_ref(ref_knl, ctx, kernel_gen, op_count, op_label, parameters,
     else:
         dev = last_cpu_dev
 
-    print "using", dev
+    print "using %s for the reference calculation" % dev
 
     # }}}