diff --git a/test/util_arq_chat_file_1.py b/test/util_arq_chat_file_1.py
index 0da23135..7fcda96c 100644
--- a/test/util_arq_chat_file_1.py
+++ b/test/util_arq_chat_file_1.py
@@ -32,6 +32,7 @@ def t_highsnr_arq_short_station1(
     mycall: str,
     dxcall: str,
     message: str,
+    lowbwmode: bool,
 ):
     log = structlog.get_logger(__name__)
     orig_tx_func: object
@@ -70,10 +71,11 @@ def t_highsnr_arq_short_station1(
 
     # enable testmode
     data_handler.TESTMODE = True
-    modem.TESTMODE = True
     modem.RXCHANNEL = "/tmp/hfchannel1"
+    modem.TESTMODE = True
     modem.TXCHANNEL = "/tmp/hfchannel2"
     static.HAMLIB_RADIOCONTROL = "disabled"
+    static.LOW_BANDWITH_MODE = lowbwmode
     static.MYGRID = bytes("AA12aa", "utf-8")
     static.RESPOND_TO_CQ = True
 
diff --git a/test/util_arq_chat_file_2.py b/test/util_arq_chat_file_2.py
index fd25d7fe..a8937fc4 100644
--- a/test/util_arq_chat_file_2.py
+++ b/test/util_arq_chat_file_2.py
@@ -32,6 +32,7 @@ def t_highsnr_arq_short_station2(
     mycall: str,
     dxcall: str,
     message: str,
+    lowbwmode: bool,
 ):
     log = structlog.get_logger(__name__)
     orig_tx_func: object
@@ -70,10 +71,11 @@ def t_highsnr_arq_short_station2(
 
     # enable testmode
     data_handler.TESTMODE = True
-    modem.TESTMODE = True
     modem.RXCHANNEL = "/tmp/hfchannel2"
+    modem.TESTMODE = True
     modem.TXCHANNEL = "/tmp/hfchannel1"
     static.HAMLIB_RADIOCONTROL = "disabled"
+    static.LOW_BANDWITH_MODE = lowbwmode
     static.MYGRID = bytes("AA12aa", "utf-8")
     static.RESPOND_TO_CQ = True
 
diff --git a/test/wip_test_arq_file.py b/test/wip_test_arq_file.py
index 644955d1..7e1cca57 100644
--- a/test/wip_test_arq_file.py
+++ b/test/wip_test_arq_file.py
@@ -65,7 +65,8 @@ def analyze_results(station1: list, station2: list):
 # @pytest.mark.parametrize("n_frames_per_burst", [1, 2, 3])
 @pytest.mark.parametrize("freedv_mode", ["datac3"])
 @pytest.mark.parametrize("n_frames_per_burst", [2])
-def test_arq_short(freedv_mode: str, n_frames_per_burst: int):
+@pytest.mark.parametrize("lowbwmode", [False, True])
+def test_arq_short(freedv_mode: str, n_frames_per_burst: int, lowbwmode: bool):
     log = structlog.get_logger(__name__)
 
     s1_data = []
@@ -103,6 +104,7 @@ def test_arq_short(freedv_mode: str, n_frames_per_burst: int):
                 STATIONS[0],
                 STATIONS[1],
                 messages[0],
+                lowbwmode,
             ),
             daemon=True,
         ),
@@ -115,6 +117,7 @@ def test_arq_short(freedv_mode: str, n_frames_per_burst: int):
                 STATIONS[1],
                 STATIONS[0],
                 messages[0],
+                lowbwmode,
             ),
             daemon=True,
         ),