diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..25d45cd
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,6 @@
+%.jar: %.kt
+	kotlinc -include-runtime $< -d $@
+
+.PHONY: test
+test: day$(day)/day$(day).jar
+	cd day$(day); java -jar day$(day).jar