diff --git a/include/tests_ports_packages b/include/tests_ports_packages
index 42288a07..4a9fe6f3 100644
--- a/include/tests_ports_packages
+++ b/include/tests_ports_packages
@@ -1161,7 +1161,9 @@ EOF
             LogText "Result: found ${ROOTDIR}usr/lib/update-notifier/apt-check"
             LogText "Test: checking if any of the updates contain security updates"
             # apt-check binary is a script and translated. Do not search for normal text strings, but use numbered output only
-            FIND=$(${ROOTDIR}usr/lib/update-notifier/apt-check 2>&1 | ${AWKBINARY} -F\; '{ print $2 }')
+            # We search for the lines that start with a number, as on Ubuntu 24.04 an error can happen:
+            # Warning: W:Unable to read /var/lib/ubuntu-advantage/apt-esm/etc/apt/apt.conf.d/ - DirectoryExists (2: No such file or directory)
+            FIND=$(${ROOTDIR}usr/lib/update-notifier/apt-check 2>&1 | ${GREPBINARY} '^[0-9]' | ${AWKBINARY} -F\; '{ print $2 }')
             # Check if we get the proper line back and amount of security patches available
             if [ -z "${FIND}" ]; then
                 LogText "Result: did not find security updates line"