--- /dev/null
+var test = require('tape');
+var resolve = require('../');
+
+test('core modules', function (t) {
+ t.ok(resolve.isCore('fs'));
+ t.ok(resolve.isCore('net'));
+ t.ok(resolve.isCore('http'));
+
+ t.ok(!resolve.isCore('seq'));
+ t.ok(!resolve.isCore('../'));
+ t.end();
+});