diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3ed0e2a6..ba5d1eda 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -63,7 +63,7 @@ add_test(NAME 001_highsnr_virtual_P_P
                         PATH=$PATH:${CODEC2_BUILD_DIR}/src;
                         cd ${CMAKE_CURRENT_SOURCE_DIR}/test/001_highsnr_stdio_audio;
                         ./test_virtual.sh")
-       set_tests_properties(001_highsnr_virtual_P_P PROPERTIES PASS_REGULAR_EXPRESSION "RECEIVED BURSTS: 1 RECEIVED FRAMES: 2")
+       set_tests_properties(001_highsnr_virtual_P_P PROPERTIES PASS_REGULAR_EXPRESSION "RECEIVED BURSTS: 5 RECEIVED FRAMES: 10 RX_ERRORS: 0")
 
 endif()
        
diff --git a/test/001_highsnr_stdio_audio/test_rx.py b/test/001_highsnr_stdio_audio/test_rx.py
index 330c9954..6f88ddd9 100644
--- a/test/001_highsnr_stdio_audio/test_rx.py
+++ b/test/001_highsnr_stdio_audio/test_rx.py
@@ -82,6 +82,7 @@ total_n_bytes = 0
 rx_total_frames = 0
 rx_frames = 0
 rx_bursts = 0
+rx_errors = 0
 timeout = time.time() + 10
 receive = True
 
@@ -106,8 +107,8 @@ while receive and time.time() < timeout:
     nbytes = codec2.api.freedv_rawdatarx(freedv, bytes_out, data_in) # demodulate audio
     total_n_bytes = total_n_bytes + nbytes
     
+    rx_status = codec2.api.freedv_get_rx_status(freedv)
     if DEBUGGING_MODE == True:
-        rx_status = codec2.api.freedv_get_rx_status(freedv)
         rx_status_string = codec2.api.rx_sync_flags_to_text[rx_status]
         print(f"rx_status: {rx_status_string}", file=sys.stderr)
         
@@ -119,12 +120,14 @@ while receive and time.time() < timeout:
             rx_frames = 0
             rx_bursts = rx_bursts + 1
             
+    if rx_status & codec2.api.FREEDV_RX_BIT_ERRORS:
+        rx_errors = rx_errors + 1
         
     if rx_bursts == N_BURSTS:
         receive = False   
                    
 
-print(f"RECEIVED BURSTS: {rx_bursts} RECEIVED FRAMES: {rx_total_frames}", file=sys.stderr)
+print(f"RECEIVED BURSTS: {rx_bursts} RECEIVED FRAMES: {rx_total_frames} RX_ERRORS: {rx_errors}", file=sys.stderr)
 
 # and at last check if we had an openend pyaudio instance and close it
 if AUDIO_INPUT_DEVICE != -1: 
diff --git a/test/001_highsnr_stdio_audio/test_virtual.sh b/test/001_highsnr_stdio_audio/test_virtual.sh
index 6fd08b6d..367fd628 100755
--- a/test/001_highsnr_stdio_audio/test_virtual.sh
+++ b/test/001_highsnr_stdio_audio/test_virtual.sh
@@ -18,8 +18,8 @@ RX_LOG=$(mktemp)
 # make sure all child processes are killed when we exit
 trap 'jobs -p | xargs -r kill' EXIT
 
-python3 test_rx.py --mode datac0 --frames 2 --bursts 1 --audiodev 4 --debug &
+python3 test_rx.py --mode datac0 --frames 2 --bursts 5 --audiodev 4 --debug &
 rx_pid=$!
 sleep 1
-python3 test_tx.py --mode datac0 --frames 2 --bursts 1 --audiodev 5
+python3 test_tx.py --mode datac0 --frames 2 --bursts 5 --delay 500 --audiodev 5
 wait ${rx_pid}
diff --git a/test/codec2.py b/test/codec2.py
index 7c73922f..4019138d 100644
--- a/test/codec2.py
+++ b/test/codec2.py
@@ -74,6 +74,12 @@ api.FREEDV_MODE_DATAC1 = 10
 api.FREEDV_MODE_DATAC3 = 12
 api.FREEDV_MODE_DATAC0 = 14
 
+# Return code flags for freedv_get_rx_status() function
+api.FREEDV_RX_TRIAL_SYNC = 0x1       # demodulator has trial sync
+api.FREEDV_RX_SYNC       = 0x2       # demodulator has sync
+api.FREEDV_RX_BITS       = 0x4       # data bits have been returned
+api.FREEDV_RX_BIT_ERRORS = 0x8       # FEC may not have corrected all bit errors (not all parity checks OK)
+
 api.rx_sync_flags_to_text = [
     "----",
     "---T",