diff --git a/test/README.md b/test/README.md
index 7ce27761..ddc779f9 100644
--- a/test/README.md
+++ b/test/README.md
@@ -1,3 +1,22 @@
+# TESTS
+
+
+## TEST_TX.py --> Send string "TEST"
+'''
+./TEST_TX.py | ./freedv_data_raw_rx DATAC3 - - | hexdump -C
+'''
+Output should be:
+'''
+payload bytes_per_modem_frame: 30
+00000000  54 45 53 54 00 00 00 00  00 00 00 00 00 00 00 00  |TEST............|
+modem bufs processed: 22  output bytes: 30 output_frames: 1 
+00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00        |..............|
+0000001e
+'''
+       
+       
+       
+       
        
        ./TEST_TX.py | ./freedv_data_raw_rx DATAC3 - -