diff --git a/poky/meta-poky/conf/distro/poky.conf b/poky/meta-poky/conf/distro/poky.conf
index b4c64c4..6625a11 100644
--- a/poky/meta-poky/conf/distro/poky.conf
+++ b/poky/meta-poky/conf/distro/poky.conf
@@ -35,15 +35,11 @@
 SANITY_TESTED_DISTROS ?= " \
             poky-3.3 \n \
             poky-3.4 \n \
-            ubuntu-16.04 \n \
             ubuntu-18.04 \n \
             ubuntu-20.04 \n \
             ubuntu-21.10 \n \
             fedora-34 \n \
             fedora-35 \n \
-            centos-7 \n \
-            centos-8 \n \
-            debian-9 \n \
             debian-10 \n \
             debian-11 \n \
             opensuseleap-15.3 \n \
@@ -68,3 +64,6 @@
 BB_HASHSERVE ??= "auto"
 
 INIT_MANAGER = "sysvinit"
+
+# We need debug symbols so that SPDX license manifests for the kernel work
+KERNEL_EXTRA_FEATURES:append = " features/debug/debug-kernel.scc"