Return the promise

lib/query-interface.js

@@ -328,7 +328,7 @@ module.exports = (function() {
       sql = 'DESCRIBE ' + table + ';'
     }
 
-    this.sequelize.query(sql, null, { raw: true }).then(function(data) {
+    return this.sequelize.query(sql, null, { raw: true }).then(function(data) {
       // If no data is returned from the query, then the table name may be wrong.
       // Query generators that use information_schema for retrieving table info will just return an empty result set,
       // it will not throw an error like built-ins do (e.g. DESCRIBE on MySql).