diff --git a/chapter08/gcc.xml b/chapter08/gcc.xml
index 3734e258e..7991272fa 100644
--- a/chapter08/gcc.xml
+++ b/chapter08/gcc.xml
@@ -172,6 +172,13 @@ su tester -c "PATH=$PATH make -k check"</userinput></screen>
     <!-- https://gcc.gnu.org/PR107915 and https://gcc.gnu.org/PR109353 -->
     Two tests named <filename>copy.cc</filename> and
     <filename>contracts-tmpl-spec2.C</filename> are known to fail.
+    <!--
+      It seems a regression in 13.2 but it does not happen in
+      https://gcc.gnu.org/pipermail/gcc-testresults/2023-August/792164.html.
+      I'll investigate further.
+    -->
+    Some C++ module tests named <filename>xtreme-*</filename> are known to
+    fail.
     </para>
 
     <!-- Need further investigation -->