diff --git a/test/fileutils/test_fileutils.rb b/test/fileutils/test_fileutils.rb
index 4afc8085ef..8c49eb39bb 100644
--- a/test/fileutils/test_fileutils.rb
+++ b/test/fileutils/test_fileutils.rb
@@ -1798,7 +1798,7 @@ cd -
     return if /mswin|mingw/ =~ RUBY_PLATFORM
 
     mkdir 'tmpdatadir'
-    chmod 0o700, 'tmpdatadir'
+    chmod 0o000, 'tmpdatadir'
     rm_rf 'tmpdatadir'
 
     assert_file_not_exist 'tmpdatadir'