diff --git a/test/ruby/test_default_gems.rb b/test/ruby/test_default_gems.rb
index fe91ceb84c..837f7571ea 100644
--- a/test/ruby/test_default_gems.rb
+++ b/test/ruby/test_default_gems.rb
@@ -7,7 +7,7 @@ class TestDefaultGems < Test::Unit::TestCase
     srcdir = File.expand_path('../../..', __FILE__)
     Dir.glob("#{srcdir}/{lib,ext}/**/*.gemspec").map do |src|
       assert_nothing_raised do
-        raise("invalid spec in #{file}") unless Gem::Specification.load(src)
+        raise("invalid spec in #{src}") unless Gem::Specification.load(src)
       end
     end
   end