diff --git a/chapter08/util-linux.xml b/chapter08/util-linux.xml
index b1df6ea6d..8f72a80d7 100644
--- a/chapter08/util-linux.xml
+++ b/chapter08/util-linux.xml
@@ -95,6 +95,13 @@
 <screen role="nodump"><userinput>bash tests/run.sh --srcdir=$PWD --builddir=$PWD</userinput></screen>
     </warning>
 
+    <note><para>There is one test that depends on the configuration of the kernel.
+    If CONFIG_USER_NS or CONFIG_PID_NS are not set, the tests will hang forever.
+    To work around the problem, delete one test:</para>
+
+    <screen><userinput remap="test">rm tests/ts/lsns/ioctl_ns</userinput></screen>
+    </note>
+
 <screen><userinput remap="test">chown -Rv tester .
 su tester -c "make -k check"</userinput></screen>