diff --git a/src/Facade/FactoryMuffin.php b/src/Facade/FactoryMuffin.php
index 91e49a0..7000b31 100644
--- a/src/Facade/FactoryMuffin.php
+++ b/src/Facade/FactoryMuffin.php
@@ -12,14 +12,14 @@
  *
  * @method static void setSaveMethod(string $method) Set the method we use when saving objects.
  * @method static void setDeleteMethod(string $method) Set the method we use when deleting objects.
- * @method static object create(string $model, array $attr) Creates and saves in db an instance of the model.
+ * @method static object create(string $model, array $attr = array()) Creates and saves in db an instance of the model.
  * @method static mixed save(object $object) Save our object to the db, and keep track of it.
  * @method static object[] saved() Return an array of saved objects.
  * @method static void deleteSaved() Call the delete method on any saved objects.
- * @method static object instance(string $model, array $attr, bool $save) Return an instance of the model.
- * @method static array attributesFor(string $model, array $attr, bool $save) Returns the mock attributes for the model.
- * @method static void define(string $model, array $definition) Define a new model factory.
- * @method static string|object generateAttr(string $kind, string $model, bool $save) Generate the attributes.
+ * @method static object instance(string $model, array $attr = array(), bool $save = false) Return an instance of the model.
+ * @method static array attributesFor(string $model, array $attr = array(), bool $save = false) Returns the mock attributes for the model.
+ * @method static void define(string $model, array $definition = array()) Define a new model factory.
+ * @method static string|object generateAttr(string $kind, string $model = null, bool $save = false) Generate the attributes.
  * @method static void loadFactories(string|string[] $paths) Load the specified factories.
  *
  * @package League\FactoryMuffin\Facades
@@ -56,6 +56,8 @@ protected static function fmInstance()
     /**
      * Handle dynamic, static calls to the object.
      *
+     * @codeCoverageIgnore
+     *
      * @param string $method
      * @param array  $args
      *
diff --git a/src/FactoryMuffin.php b/src/FactoryMuffin.php
index fad81ab..80706c7 100644
--- a/src/FactoryMuffin.php
+++ b/src/FactoryMuffin.php
@@ -88,7 +88,7 @@ public function setDeleteMethod($method)
      *
      * @return object
      */
-    public function create($model, $attr = array())
+    public function create($model, array $attr = array())
     {
         $obj = $this->instance($model, $attr, true);
 
@@ -179,7 +179,7 @@ public function deleteSaved()
      *
      * @return object
      */
-    public function instance($model, $attr = array(), $save = false)
+    public function instance($model, array $attr = array(), $save = false)
     {
         // Get the factory attributes for that model
         $attr_array = $this->attributesFor($model, $attr, $save);
@@ -203,7 +203,7 @@ public function instance($model, $attr = array(), $save = false)
      *
      * @return array
      */
-    public function attributesFor($model, $attr = array(), $save = false)
+    public function attributesFor($model, array $attr = array(), $save = false)
     {
         $factory_attrs = $this->getFactoryAttrs($model);