diff --git a/.gitignore b/.gitignore
index 479b8d7..575a5fc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,7 +34,7 @@ gps-sdr-sim-lut
 *.dSYM/
 
 # Output
-gpssim.bin
+*.bin
 
 # Temporary files
 *.swp
diff --git a/Makefile b/Makefile
index 660a519..bd4727f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 # Makefile for Linux etc.
 
-.PHONY: all clean
+.PHONY: all clean test test-lut test-nolut
 all: gps-sdr-sim gps-sdr-sim-lut
 
 SHELL=/bin/bash
@@ -18,4 +18,17 @@ gpssim-lut.o: gpssim.c
 	${CC} -c -D_SINE_LUT ${CFLAGS} $< -o $@
 
 clean:
-	rm -f gpssim.o gpssim-lut.o gps-sdr-sim gps-sdr-sim-lut
+	rm -f gpssim.o gpssim-lut.o gps-sdr-sim gps-sdr-sim-lut *.bin
+
+test: test-lut
+test-lut: gps-sdr-sim-lut
+	time ./gps-sdr-sim-lut -e brdc3540.14n -u circle.csv -b 8
+	test "$$(md5sum gpssim.bin | awk '{print $$1}')" == "39a577af659440605c4ebbe178f4c4e3"
+	time ./gps-sdr-sim-lut -e brdc3540.14n -u circle.csv -b 16
+	test "$$(md5sum gpssim.bin | awk '{print $$1}')" == "bdd460893ad73b19412fc1757e62ccf9"
+
+test-nolut: gps-sdr-sim
+	time ./gps-sdr-sim -e brdc3540.14n -u circle.csv -b 8
+	test "$$(md5sum gpssim.bin | awk '{print $$1}')" == "f4beb0857f82038d0465eb9934009edd"
+	time ./gps-sdr-sim -e brdc3540.14n -u circle.csv -b 16
+	test "$$(md5sum gpssim.bin | awk '{print $$1}')" == "10403720cb3483515f470fdea09e02ed"