diff --git a/Makefile b/Makefile
index 258b183..744f050 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,8 @@
 
 test:
 	@./support/expresso/bin/expresso \
-		-I lib
+		-I lib \
+		test/*.test.js
 
 benchmark:
 	@node examples/benchmark.js