Makefile in twilio-ruby-5.70.1 vs Makefile in twilio-ruby-5.71.0

@@ -1,14 +1,18 @@
-.PHONY: githooks install test lint docs docker-build docker-push
+.PHONY: githooks install test test-docker lint docs docker-build docker-push
 
 githooks:
 	ln -sf ../../githooks/pre-commit .git/hooks/pre-commit
 
 install:
 	bundle install --with development; bundle exec rake install
 
 test:
 	bundle exec rake spec
+
+test-docker:
+	docker build -t twilio/twilio-ruby .
+	docker run twilio/twilio-ruby bundle exec rake spec
 
 docs:
 	bundle exec yard doc --output-dir ./doc
 
 authors: