diff --git a/chapter06/bison.xml b/chapter06/bison.xml
index 4bcaf2f3e..0d8a5ac30 100644
--- a/chapter06/bison.xml
+++ b/chapter06/bison.xml
@@ -55,7 +55,7 @@
 
 <screen><userinput remap="make">make</userinput></screen>
 
-    <para>To test the results, issue:</para>
+    <para>To test the results (about 0.5 SBU), issue:</para>
 
 <screen><userinput remap="test">make check</userinput></screen>