diff --git a/spec/bundle/commands/check_command_spec.rbi b/spec/bundle/commands/check_command_spec.rbi
new file mode 100644
index 000000000..e76d51eec
--- /dev/null
+++ b/spec/bundle/commands/check_command_spec.rbi
@@ -0,0 +1,2 @@
+class TestChecker < Bundle::Checker::Base
+end
diff --git a/spec/stub/formulary.rb b/spec/stub/formulary.rb
index ede1c0ef3..c8376a376 100644
--- a/spec/stub/formulary.rb
+++ b/spec/stub/formulary.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-class Formulary
+module Formulary
   def self.factory(name)
     Formula.new(name)
   end