diff --git a/mrblib/rf/directory.rb b/mrblib/rf/directory.rb
index 0f11e27..da7b478 100644
--- a/mrblib/rf/directory.rb
+++ b/mrblib/rf/directory.rb
@@ -5,15 +5,11 @@ class Node
 
       def initialize(path)
         @path = path
-        @dir = Dir.open(path)
+        @children = Dir.entries(path).reject { |e| ['.', '..'].include?(e) }.sort
       end
 
       def next
-        child = loop do
-          child = @dir.read
-          return unless child
-          break child unless %w[. ..].include?(child)
-        end
+        return unless child = @children.shift
 
         File.join(@path, child)
       end
diff --git a/spec/glonal_options_spec.rb b/spec/glonal_options_spec.rb
index e104906..5728dfa 100644
--- a/spec/glonal_options_spec.rb
+++ b/spec/glonal_options_spec.rb
@@ -2,16 +2,16 @@
   context 'with -R option' do
     let(:output) do
       <<~OUTPUT
-        ./foo/bar: foobar
         ./a/b/c: abc
+        ./foo/bar: foobar
       OUTPUT
     end
 
     before do
-      FileUtils.mkdir_p(expand_path('foo'))
-      write_file('foo/bar', 'foobar')
       FileUtils.mkdir_p(expand_path('a/b'))
       write_file('a/b/c', 'abc')
+      FileUtils.mkdir_p(expand_path('foo'))
+      write_file('foo/bar', 'foobar')
 
       run_rf('-R _ .')
     end