diff --git a/test/test.js b/test/test.js
index 203c71e..90bdd1c 100644
--- a/test/test.js
+++ b/test/test.js
@@ -9,6 +9,9 @@ const portString = "/dev/serial/by-id/usb-Silicon_Labs_CP2102_USB_to_UART_Bridge
 
 const buildPath = path.join(__dirname, "lora32", "build");
 
+const TB_DEV1 = process.env.TB_DEV1 || "0000";
+const TB_DEV2 = process.env.TB_DEV2 || "0001";
+
 var args = [
 	"--chip",
 	"esp32",
@@ -105,20 +108,20 @@ async.series([
 
     async.parallel([
       function(done) {
-        flash(portString.replace("SERIAL_ID", "0001"), done);
+        flash(portString.replace("SERIAL_ID", TB_DEV1), done);
       }, function(done) {
-        flash(portString.replace("SERIAL_ID", "0002"), done);
+        flash(portString.replace("SERIAL_ID", TB_DEV2), done);
       }], next);
   },
 
   function(next) {
     async.parallel({
       dev1: function(done) {
-        serial(portString.replace("SERIAL_ID", "0001"), done);
+        serial(portString.replace("SERIAL_ID", TB_DEV1), done);
       },
       
       dev2: function(done) {
-        serial(portString.replace("SERIAL_ID", "0002"), done);
+        serial(portString.replace("SERIAL_ID", TB_DEV2), done);
       }
     }, next);
   }