diff --git a/spec/support/path.rb b/spec/support/path.rb
index 3e42589f4d3..1c142e2643e 100644
--- a/spec/support/path.rb
+++ b/spec/support/path.rb
@@ -22,7 +22,7 @@ def bindir
     end
 
     def gem_bin
-      @gem_bin ||= ruby_core? ? ENV["GEM_COMMAND"] : "#{Gem.ruby} -I#{spec_dir}/rubygems -S gem --backtrace"
+      @gem_bin ||= ruby_core? ? ENV["GEM_COMMAND"] : "#{Gem.ruby} -S gem --backtrace"
     end
 
     def spec_dir