diff --git a/tests/run_tests_device_emu.sh b/tests/run_tests_device_emu.sh
index 0e18841a00..0c41f8e494 100755
--- a/tests/run_tests_device_emu.sh
+++ b/tests/run_tests_device_emu.sh
@@ -9,6 +9,8 @@ $MICROPYTHON -O$PYOPT main.py >/dev/null &
 upy_pid=$!
 sleep 1
 
+export TREZOR_PATH=udp:127.0.0.1:21324
+
 # run tests
 cd ../tests
 error=0