diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..9ee85c2
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,4 @@
+MODULES=pasn1.py
+
+test:
+	(echo $(MODULES) | entr sh -c 'python -m coverage run -m unittest $(basename $(MODULES)) && coverage report -m')