diff --git a/rtl/Makefile b/rtl/Makefile
index 1f5bb0e..3067f01 100644
--- a/rtl/Makefile
+++ b/rtl/Makefile
@@ -28,5 +28,8 @@ timing: ${FN}.rpt
 clean:
 	rm -f ${FN}.json ${FN}.asc ${FN}.bin ${FN}_filled.bin ${FN}.rpt
 
+test:
+	make -C tb
+
 flash: ${FN}_filled.bin
 	flashrom -p ft2232_spi:type=232H,port=A -w "${FN}_filled.bin"