1 files changed, 6 insertions, 3 deletions
diff --git a/railties/lib/rails/secrets.rb b/railties/lib/rails/secrets.rb
index c7a8676d7b..0883857c55 100644
--- a/railties/lib/rails/secrets.rb
+++ b/railties/lib/rails/secrets.rb
@@ -100,12 +100,15 @@ module Rails
         end
 
         def writing(contents)
-          tmp_path = File.join(Dir.tmpdir, File.basename(path))
-          File.write(tmp_path, contents)
+          tmp_file = "#{File.basename(path)}.#{Process.pid}"
+          tmp_path = File.join(Dir.tmpdir, tmp_file)
+          IO.binwrite(tmp_path, contents)
 
           yield tmp_path
 
-          write(File.read(tmp_path))
+          updated_contents = IO.binread(tmp_path)
+
+          write(updated_contents) if updated_contents != contents
         ensure
           FileUtils.rm(tmp_path) if File.exist?(tmp_path)
         end