diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eaf33f584..1d17de920 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,5 +15,5 @@ jobs:
     needs: Spec
     uses: "puppetlabs/cat-github-actions/.github/workflows/module_acceptance.yml@main"
     with:
-      flags: "--nightly --platform-exclude centos-7 --platform-exclude oraclelinux-7 --platform-exclude scientific-7 --platform-exclude almalinux-8"
+      flags: "--nightly --platform-include sles-15"
     secrets: "inherit"
diff --git a/Gemfile b/Gemfile
index 6dd3b77cc..d74d8b63e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -42,8 +42,7 @@ group :development, :release_prep do
   gem "puppet-blacksmith", '~> 7.0',      require: false
 end
 group :system_tests do
-  gem "puppet_litmus", '~> 2.0',   require: false, platforms: [:ruby, :x64_mingw] if !ENV['PUPPET_FORGE_TOKEN'].to_s.empty?
-  gem "puppet_litmus", '~> 1.0',   require: false, platforms: [:ruby, :x64_mingw] if ENV['PUPPET_FORGE_TOKEN'].to_s.empty?
+  gem "puppet_litmus", git: 'https://github.com/puppetlabs/puppet_litmus.git', branch: 'CAT-2476-Address_SLES_failures', require: false, platforms: [:ruby, :x64_mingw]
   gem "CFPropertyList", '< 3.0.7', require: false, platforms: [:mswin, :mingw, :x64_mingw]
   gem "serverspec", '~> 2.41',     require: false
 end