diff --git a/test/ruby/test_file_exhaustive.rb b/test/ruby/test_file_exhaustive.rb
index b96b727349..975bcb6bc2 100644
--- a/test/ruby/test_file_exhaustive.rb
+++ b/test/ruby/test_file_exhaustive.rb
@@ -18,7 +18,7 @@ class TestFileExhaustive < Test::Unit::TestCase
   end
 
   def setup
-    @dir = Dir.mktmpdir("rubytest-file")
+    @dir = Dir.mktmpdir("ruby-test")
     File.chown(-1, Process.gid, @dir)
   end