diff --git a/lib/mixed.js b/lib/mixed.js
index 581ed8e..b2300c8 100644
--- a/lib/mixed.js
+++ b/lib/mixed.js
@@ -103,7 +103,10 @@ SchemaType.prototype = {
     if (this._nullable && v === null) return true;
     return !this._typeCheck || this._typeCheck(v);
   },
-  resolve: function resolve(context, parent) {
+  resolve: function resolve(_ref) {
+    var context = _ref.context;
+    var parent = _ref.parent;
+
     if (this._conditions.length) {
       return this._conditions.reduce(function (schema, match) {
         return match.resolve(schema, match.getValue(parent, context));
@@ -115,7 +118,7 @@ SchemaType.prototype = {
   cast: function cast(value) {
     var opts = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
 
-    var schema = this.resolve(opts.context, opts.parent);
+    var schema = this.resolve(opts);
 
     return schema._cast(value, opts);
   },
@@ -138,7 +141,7 @@ SchemaType.prototype = {
 
     if (typeof options === 'function') cb = options, options = {};
 
-    var schema = this.resolve(options.context, options.parent);
+    var schema = this.resolve(options);
 
     return nodeify(schema._validate(value, options), cb);
   },
@@ -194,9 +197,9 @@ SchemaType.prototype = {
       throw err;
     }), cb);
   },
-  getDefault: function getDefault(_ref) {
-    var context = _ref.context;
-    var parent = _ref.parent;
+  getDefault: function getDefault(_ref2) {
+    var context = _ref2.context;
+    var parent = _ref2.parent;
 
     return this._resolve(context, parent).default();
   },
diff --git a/lib/util/lazy.js b/lib/util/lazy.js
index 47cd342..0025480 100644
--- a/lib/util/lazy.js
+++ b/lib/util/lazy.js
@@ -2,6 +2,8 @@
 
 exports.__esModule = true;
 
+function _objectWithoutProperties(obj, keys) { var target = {}; for (var i in obj) { if (keys.indexOf(i) >= 0) continue; if (!Object.prototype.hasOwnProperty.call(obj, i)) continue; target[i] = obj[i]; } return target; }
+
 function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
 
 var _require = require('./_');
@@ -12,24 +14,28 @@ var Lazy = function () {
   function Lazy(mapFn) {
     _classCallCheck(this, Lazy);
 
-    this._resolve = function (value) {
-      var schema = mapFn(value);
+    this._resolve = function () {
+      var schema = mapFn.apply(undefined, arguments);
       if (!isSchema(schema)) throw new TypeError('lazy() functions must return a valid schema');
 
       return schema;
     };
   }
 
-  Lazy.prototype.resolve = function resolve(context, parent, value) {
-    return this._resolve(value);
+  Lazy.prototype.resolve = function resolve(_ref) {
+    var value = _ref.value;
+
+    var rest = _objectWithoutProperties(_ref, ['value']);
+
+    return this._resolve(value, rest);
   };
 
   Lazy.prototype.cast = function cast(value, options) {
-    return this._resolve(value).cast(value, options);
+    return this._resolve(value, options).cast(value, options);
   };
 
   Lazy.prototype.validate = function validate(value, options) {
-    return this._resolve(value).validate(value, options);
+    return this._resolve(value, options).validate(value, options);
   };
 
   return Lazy;
diff --git a/lib/util/reach.js b/lib/util/reach.js
index 5703f0b..b15405e 100644
--- a/lib/util/reach.js
+++ b/lib/util/reach.js
@@ -26,7 +26,7 @@ module.exports = function (obj, path, value, context) {
     if (isArray || has(obj, '_subType')) {
       // we skipped an array
       var idx = isArray ? parseInt(part, 10) : 0;
-      obj = obj.resolve(context, parent, value)._subType;
+      obj = obj.resolve({ context: context, parent: parent, value: value })._subType;
 
       if (value) {
 
@@ -38,7 +38,7 @@ module.exports = function (obj, path, value, context) {
     }
 
     if (!isArray) {
-      obj = obj.resolve(context, parent, value);
+      obj = obj.resolve({ context: context, parent: parent, value: value });
 
       if (!has(obj, 'fields') || !has(obj.fields, part)) throw new Error('The schema does not contain the path: ' + path + '. ' + ('(failed at: ' + lastPart + ' which is a type: "' + obj._type + '") '));
 
@@ -50,5 +50,5 @@ module.exports = function (obj, path, value, context) {
     }
   });
 
-  return obj && obj.resolve(value, parent, value);
+  return obj && obj.resolve({ context: context, parent: parent, value: value });
 };
\ No newline at end of file
diff --git a/src/object.js b/src/object.js
index 2e706dc..85af273 100644
--- a/src/object.js
+++ b/src/object.js
@@ -268,7 +268,7 @@ function sortFields(fields, excludes = []){
 
     if (Ref.isRef(value) && !value.isContext)
       addNode(value.path)
-    else if (isSchema(value))
+    else if (isSchema(value) && value._deps)
       value._deps.forEach(addNode)
   }
 
diff --git a/src/util/lazy.js b/src/util/lazy.js
index 15d26a3..d9ed062 100644
--- a/src/util/lazy.js
+++ b/src/util/lazy.js
@@ -26,5 +26,6 @@ class Lazy {
   }
 }
 
+Lazy.prototype.__isYupSchema__ = true;
 
 export default Lazy