diff --git a/Psr/Log/Test/LoggerInterfaceTest.php b/Psr/Log/Test/LoggerInterfaceTest.php
index f66a2b0..a0391a5 100644
--- a/Psr/Log/Test/LoggerInterfaceTest.php
+++ b/Psr/Log/Test/LoggerInterfaceTest.php
@@ -84,8 +84,8 @@ public function testContextReplacement()
 
     public function testObjectCastToString()
     {
-        if (method_exists($this, 'createMock')) {
-            $dummy = $this->createMock('Psr\Log\Test\DummyTest', array('__toString'));
+        if (method_exists($this, 'createPartialMock')) {
+            $dummy = $this->createPartialMock('Psr\Log\Test\DummyTest', array('__toString'));
         } else {
             $dummy = $this->getMock('Psr\Log\Test\DummyTest', array('__toString'));
         }