diff --git a/makefile b/makefile
index 1f15f75..b9a852d 100644
--- a/makefile
+++ b/makefile
@@ -35,9 +35,8 @@ $(program_obj_filesobj_files): %.o: %.c
 # --------------------------
 # Unit Tests
 # --------------------------
-unitTests:
-	echo "needs to be implemented"
-
+unitTests: numbers.o test_numbers.c $(unityfolder)/unity.c
+	$(CC) $(FLAGS) -I$(unityfolder) -o runtest_numbers test_numbers.c numbers.o $(unityfolder)/unity.c
 # --------------------------
 # Clean
 # --------------------------