diff --git a/Makefile b/Makefile
index d2d0a4a34c..6899cb262d 100644
--- a/Makefile
+++ b/Makefile
@@ -4,6 +4,7 @@ ALL_TESTS = $(shell find test/ -name '*.test.js')
 run-tests:
 	@npm link > /dev/null --local
 	@./node_modules/.bin/expresso \
+		-t 3000 \
 		-I support \
 		-I lib \
 		--serial \