diff --git a/lib/facter/apt_sources.rb b/lib/facter/apt_sources.rb
index c985802010..17c5d089e8 100644
--- a/lib/facter/apt_sources.rb
+++ b/lib/facter/apt_sources.rb
@@ -5,7 +5,7 @@
   confine osfamily: 'Debian'
   setcode do
     sources = ['sources.list']
-    Dir.glob('/etc/apt/sources.list.d/*.list').each do |file|
+    Dir.glob('/etc/apt/sources.list.d/*.{list,sources}').each do |file|
       sources.push(File.basename(file))
     end
     sources
diff --git a/manifests/ppa.pp b/manifests/ppa.pp
index 1bb4c81866..b1a055ecae 100644
--- a/manifests/ppa.pp
+++ b/manifests/ppa.pp
@@ -53,7 +53,11 @@
   $underscore_filename_no_slashes      = regsubst($underscore_filename, '/', '-', 'G')
   $underscore_filename_no_specialchars = regsubst($underscore_filename_no_slashes, '[\.\+]', '_', 'G')
 
-  $sources_list_d_filename  = "${dash_filename_no_specialchars}-${release}.list"
+  $sources_list_d_filename = if versioncmp($facts['os']['release']['full'], '23.10') < 0 {
+    "${dash_filename_no_specialchars}-${release}.list"
+  } else {
+    "${dash_filename_no_specialchars}-${release}.sources"
+  }
 
   if versioncmp($facts['os']['release']['full'], '21.04') < 0 {
     $trusted_gpg_d_filename = "${underscore_filename_no_specialchars}.gpg"