Avoid needless Zend\Filter dependency

src/Renderer/PhpRenderer.php

@@ -515,7 +515,11 @@ public function render($nameOrModel, $values = null)
 
         $this->setVars(array_pop($this->__varsCache));
 
-        return $this->getFilterChain()->filter($this->__content); // filter output
+        if ($this->__filterChain instanceof FilterChain) {
+            return $this->__filterChain->filter($this->__content); // filter output
+        }
+
+        return $this->__content;
     }
 
     /**

test/PhpRendererTest.php

@@ -442,4 +442,14 @@ public function testSharedInstanceHelper()
         $this->assertEquals(2, $this->renderer->sharedinstance());
         $this->assertEquals(3, $this->renderer->sharedinstance());
     }
+
+    public function testDoesNotCallFilterChainIfNoFilterChainWasSet()
+    {
+        $this->renderer->resolver()->addPath(__DIR__ . '/_templates');
+
+        $result = $this->renderer->render('empty.phtml');
+
+        $this->assertContains('Empty view', $result);
+        $this->assertAttributeEmpty('__filterChain', $this->renderer);
+    }
 }