+# again, this time with pre-existing files valid data
+for f in Release Release.gpg main_binary-amd64_Packages stable_main_source_Sources; do
+ echo "canary" > rootdir/var/lib/apt/lists/localhost:8080_dists_stable_${f}
+done
+# this will fail, the important part is that the canaries remain
+aptget update -qq 2>/dev/null || true
+ensure_n_canary_strings_in_dir rootdir/var/lib/apt/lists/ "canary" 4