diff --git a/test/profile/memory.rb b/test/profile/memory.rb
index 2a74913..b1c04c7 100644
--- a/test/profile/memory.rb
+++ b/test/profile/memory.rb
@@ -1,3 +1,5 @@
-$:.unshift(File.expand_path("../../ext", __dir__))
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift(File.expand_path('../../ext', __dir__))
 require 'tedrahcu'
 Tedrahcu.detect(File.read('tedrahcu.gemspec'))