diff --git a/Makefile b/Makefile
index 2dc65aa..4d698fc 100644
--- a/Makefile
+++ b/Makefile
@@ -2,9 +2,12 @@
 
 .PHONY: test single
 
-test: single
+test: single multi
 
 single:
 	src/diffview.py -t tests/single.diff
 
+multi:
+	src/diffview.py -t tests/multi.diff
+
 # vim:set noet ts=8 sw=8:
diff --git a/README.md b/README.md
index 39b5c84..1da3039 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,7 @@
 ## About
 
+Diff viewer.
+
 ## Usage
+
+TODO