--- /dev/null
+var readInstalled = require('../read-installed.js')
+var test = require('tap').test
+var path = require('path');
+
+function allValid(t, map) {
+ var deps = Object.keys(map.dependencies || {})
+ deps.forEach(function (dep) {
+ t.ok(map.dependencies[dep].extraneous, 'dependency ' + dep + ' of ' + map.name + ' is extraneous')
+ })
+}
+
+test('grandparent dev peer dependencies should be extraneous', function(t) {
+ readInstalled(
+ path.join(__dirname, 'fixtures/grandparent-peer-dev'),
+ { log: console.error },
+ function(err, map) {
+ allValid(t, map)
+ t.end()
+ })
+})