diff --git a/src/wmbus_rawtty.cc b/src/wmbus_rawtty.cc
index 89f35ad..8bcd559 100644
--- a/src/wmbus_rawtty.cc
+++ b/src/wmbus_rawtty.cc
@@ -66,7 +66,19 @@ shared_ptr<BusDevice> openRawTTYInternal(Detected detected,
     string device = detected.found_file;
     int bps = detected.found_bps;
 
-    assert(device != "");
+	if (detected.specified_device.command != "")
+	{
+		string identifier = "cmd_" + to_string(detected.specified_device.index);
+
+		vector<string> args;
+		vector<string> envs;
+		args.push_back("-c");
+		args.push_back(detected.specified_device.command);
+
+		auto serial = manager->createSerialDeviceCommand(identifier, "/bin/sh", args, envs, "rawtty");
+		WMBusRawTTY *imp = new WMBusRawTTY(bus_alias, serial, manager, use_hex);
+		return shared_ptr<BusDevice>(imp);
+	}
 
     if (serial_override)
     {
diff --git a/tests/test_nc1.sh b/tests/test_nc1.sh
index d979e9a..e4467c0 100755
--- a/tests/test_nc1.sh
+++ b/tests/test_nc1.sh
@@ -1,5 +1,10 @@
 #!/bin/bash
 
+if nc 2>&1 | grep -q apple
+then
+    exit 0
+fi
+
 PROG="$1"
 
 TEST=testoutput
@@ -13,7 +18,7 @@ TESTRESULT="ERROR"
 PORT=$(( $RANDOM % 10000 + 30000 ))
 
 rm -f $TEST/response
-$PROG --silent --oneshot --format=fields --selectfields=total_m3 "rtlwmbus:CMD(nc -lkv $PORT)"  MyWater iperl 33225544 NOKEY >> $TEST/response 2>&1 &
+$PROG --silent --oneshot --exitafter=5s --format=fields --selectfields=total_m3 "rtlwmbus:CMD(nc -lkv $PORT)"  MyWater iperl 33225544 NOKEY >> $TEST/response 2>&1 &
 
 sleep 0.5