diff --git a/birdy-slim-iot/payload-formatters/testing.ttnv3.js b/birdy-slim-iot/payload-formatters/testing.ttnv3.js
new file mode 100644
index 0000000..c645d88
--- /dev/null
+++ b/birdy-slim-iot/payload-formatters/testing.ttnv3.js
@@ -0,0 +1,9 @@
+function decodeUplink(input) {
+  return {
+    data: Decoder(input.bytes, input.fPort),
+    warnings: [],
+    errors: []
+  };
+}
+
+/** Attach the Code of testing.ttnv2.js **/