diff --git a/src/Renderer/AbstractRenderer.php b/src/Renderer/AbstractRenderer.php
index b84c335..9871f33 100644
--- a/src/Renderer/AbstractRenderer.php
+++ b/src/Renderer/AbstractRenderer.php
@@ -317,13 +317,8 @@ public function getAutomaticRenderError()
      * @param  Object\ObjectInterface $barcode
      * @return AbstractRenderer
      */
-    public function setBarcode($barcode)
+    public function setBarcode(Object\ObjectInterface $barcode)
     {
-        if (!$barcode instanceof Object\ObjectInterface) {
-            throw new Exception\InvalidArgumentException(
-                'Invalid barcode object provided to setBarcode()'
-            );
-        }
         $this->barcode = $barcode;
         return $this;
     }
diff --git a/src/Renderer/RendererInterface.php b/src/Renderer/RendererInterface.php
index 51dd10d..a7a8faf 100644
--- a/src/Renderer/RendererInterface.php
+++ b/src/Renderer/RendererInterface.php
@@ -21,6 +21,8 @@
 
 namespace Zend\Barcode\Renderer;
 
+use Zend\Barcode\Object\ObjectInterface;
+
 /**
  * Class for rendering the barcode
  *
@@ -146,14 +148,14 @@ public function getAutomaticRenderError();
 
     /**
      * Set the barcode object
-     * @param  Object\ObjectInterface $barcode
+     * @param  ObjectInterface $barcode
      * @return Renderer
      */
-    public function setBarcode($barcode);
+    public function setBarcode(ObjectInterface $barcode);
 
     /**
      * Retrieve the barcode object
-     * @return Object\ObjectInterface
+     * @return ObjectInterface
      */
     public function getBarcode();
 
diff --git a/src/Renderer/Svg.php b/src/Renderer/Svg.php
index 71d8fcf..570fdbe 100644
--- a/src/Renderer/Svg.php
+++ b/src/Renderer/Svg.php
@@ -116,17 +116,11 @@ public function getWidth()
     /**
      * Set an image resource to draw the barcode inside
      *
-     * @param DOMDocument $value
+     * @param  DOMDocument $svg
      * @return Svg
-     * @throw  Exception
      */
-    public function setResource($svg)
+    public function setResource(DOMDocument $svg)
     {
-        if (!$svg instanceof DOMDocument) {
-            throw new Exception\InvalidArgumentException(
-                'Invalid DOMDocument resource provided to setResource()'
-            );
-        }
         $this->resource = $svg;
         return $this;
     }
diff --git a/test/Renderer/SvgTest.php b/test/Renderer/SvgTest.php
index 2e54c93..94a014b 100644
--- a/test/Renderer/SvgTest.php
+++ b/test/Renderer/SvgTest.php
@@ -81,13 +81,6 @@ public function testGoodSvgResource()
         $this->renderer->setResource($svgResource, 10);
     }
 
-    public function testObjectSvgResource()
-    {
-        $this->setExpectedException('Zend\Barcode\Renderer\Exception\ExceptionInterface');
-        $svgResource = new \StdClass();
-        $this->renderer->setResource($svgResource);
-    }
-
     public function testDrawReturnResource()
     {
         Barcode\Barcode::setBarcodeFont(__DIR__ . '/../Object/_fonts/Vera.ttf');
diff --git a/test/Renderer/TestCommon.php b/test/Renderer/TestCommon.php
index 6379107..25c627c 100644
--- a/test/Renderer/TestCommon.php
+++ b/test/Renderer/TestCommon.php
@@ -74,13 +74,6 @@ public function testSetBarcodeObject()
         $this->assertSame($barcode, $this->renderer->getBarcode());
     }
 
-    public function testSetInvalidBarcodeObject()
-    {
-        $this->setExpectedException('\Zend\Barcode\Renderer\Exception\ExceptionInterface');
-        $barcode = new \StdClass();
-        $this->renderer->setBarcode($barcode);
-    }
-
     public function testGoodModuleSize()
     {
         $this->renderer->setModuleSize(2.34);