Build against the appengine runtime.
diff --git a/.travis.yml b/.travis.yml
index af84564..3d835cb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,7 @@
 go: 1.3
 
 install:
-  go get -v -tags='appengine appenginevm' ./...
+  go get -v -tags='appengine appenginevm' ./... && hg clone https://code.google.com/p/appengine-go/ $GOPATH/appengine
 
 script:
-  go test -v -tags='appengine appenginevm' ./...
+  go test -v -tags='appengine appenginevm' ./... && go build -v -tags='appengine'