diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 50a52195..44caf8a5 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest ]
-        ruby-version: [2.4, 2.7, 3.0]
+        ruby-version: [2.5, 2.7, 3.0]
 
     runs-on: ${{ matrix.os }}
 
diff --git a/test/standard/builds_config_test.rb b/test/standard/builds_config_test.rb
index 4644f76f..0a773576 100644
--- a/test/standard/builds_config_test.rb
+++ b/test/standard/builds_config_test.rb
@@ -124,8 +124,8 @@ def config_store(config_root = nil, rubocop_yml = highest_compatible_yml_version
   def highest_compatible_yml_version
     non_latest_ruby = Dir["config/*.yml"]
       .map { |n| n.match(/ruby-(.*)\.yml/) }.compact
-      .map { |m| Gem::Version.new(m[1]) }.sort
-      .find { |v| Gem::Version.new(RUBY_VERSION) < v }
+      .map { |m| Gem::Version.new(m[1]) }.sort.reverse
+      .find { |v| Gem::Version.new(RUBY_VERSION) > v }
 
     if non_latest_ruby
       "config/ruby-#{non_latest_ruby}.yml"