Makefile in jekyll-github-plugin-1.0.0 vs Makefile in jekyll-github-plugin-1.0.1

@@ -5,9 +5,14 @@
 
 .PHONY: start
 start:
 	@bundle exec jekyll serve --verbose
 
+.PHONY: test
+test:
+	@bundle exec jekyll build
+	@bundle exec htmlproofer _site --disable-external
+
 .PHONY: build
 build: clean
 	@gem build *.gemspec
 	@echo ::: BUILD :::