diff --git a/spec/ruby/optional/capi/fixtures/module_autoload.rb b/spec/ruby/optional/capi/fixtures/module_autoload.rb
new file mode 100644
index 0000000000..8130a24421
--- /dev/null
+++ b/spec/ruby/optional/capi/fixtures/module_autoload.rb
@@ -0,0 +1,4 @@
+class CApiModuleSpecs
+  module RubyUnderAutoload
+  end
+end