diff --git a/chapter08/perl.xml b/chapter08/perl.xml
index d3159595c..2bb849645 100644
--- a/chapter08/perl.xml
+++ b/chapter08/perl.xml
@@ -111,7 +111,7 @@ export BUILD_BZIP2=0</userinput></screen>
 
     <para>To test the results (approximately 11 SBU), issue:</para>
 
-<screen><userinput remap="test">make test</userinput></screen>
+<screen><userinput remap="test">TEST_JOBS=$(nproc) make test_harness</userinput></screen>
 
     <para>Install the package and clean up:</para>