diff --git a/lib/ruby_indexer/test/configuration_test.rb b/lib/ruby_indexer/test/configuration_test.rb
index 8c3d986f1..05609f77a 100644
--- a/lib/ruby_indexer/test/configuration_test.rb
+++ b/lib/ruby_indexer/test/configuration_test.rb
@@ -71,7 +71,7 @@ def test_indexables_avoids_duplicates_if_bundle_path_is_inside_project
       Bundler.settings.temporary(path: "vendor/bundle") do
         config = Configuration.new
 
-        assert_includes(config.instance_variable_get(:@excluded_patterns), "#{Dir.pwd}/vendor/bundle/**/*")
+        assert_includes(config.instance_variable_get(:@excluded_patterns), "#{Dir.pwd}/vendor/bundle/**/*.rb")
       end
     end