diff --git a/test/fileutils/test_fileutils.rb b/test/fileutils/test_fileutils.rb
index 1d7be69..ce5f25c 100644
--- a/test/fileutils/test_fileutils.rb
+++ b/test/fileutils/test_fileutils.rb
@@ -769,7 +769,7 @@ def test_rm_r_pathname
   def test_rm_r_no_permissions
     check_singleton :rm_rf
 
-    return if /mswin|mingw/ =~ RUBY_PLATFORM
+    return if /mswin|mingw/ =~ RUBY_PLATFORM || root_in_posix?
 
     mkdir 'tmpdatadir'
     touch 'tmpdatadir/tmpdata'