diff --git a/.gitmodules b/.gitmodules
index 3b67222..d7f3887 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,4 @@
 [submodule "firmware"]
 	path = firmware
 	url = https://git.cuvoodoo.info/stm32f1
+	branch = usb_cable_tester