diff --git a/test/iruby/kernel_test.rb b/test/iruby/kernel_test.rb
index d26856e..2061108 100644
--- a/test/iruby/kernel_test.rb
+++ b/test/iruby/kernel_test.rb
@@ -1,5 +1,3 @@
-require "base64"
-
 module IRubyTest
   class KernelTest < TestBase
     def setup