diff --git a/t/CMDTEST_readonly.rb b/t/CMDTEST_readonly.rb
index 4774727..a18dd37 100644
--- a/t/CMDTEST_readonly.rb
+++ b/t/CMDTEST_readonly.rb
@@ -6,10 +6,14 @@ class CMDTEST_readonly < Cmdtest::Testcase
   include SelftestUtils
 
   def teardown
-    File.chmod(0755, 'tmp-cmdtest-2/top/work/a_subdir')
+    if ! Cmdtest::Util.windows?
+      File.chmod(0755, 'tmp-cmdtest-2/top/work/a_subdir')
+    end
   end
 
   def test_readonly
+    return if Cmdtest::Util.windows?
+
     create_CMDTEST_foo [
       "cmd 'true.rb' do",
       "end",
@@ -31,4 +35,5 @@ class CMDTEST_readonly < Cmdtest::Testcase
     end
   end
 
+
 end