diff -u b/core/modules/image/src/Tests/ImageStyleTest.php b/core/modules/image/src/Tests/ImageStyleTest.php
--- b/core/modules/image/src/Tests/ImageStyleTest.php
+++ b/core/modules/image/src/Tests/ImageStyleTest.php
@@ -92,8 +92,9 @@
    */
   public function testTransformMimeType() {
     $image_effect_id = $this->randomMachineName();
+    $logger = $this->getMockBuilder('\Psr\Log\LoggerInterface')->getMock();
     $image_effect = $this->getMockBuilder('\Drupal\image\ImageEffectBase')
-        ->setConstructorArgs(array(array(), $image_effect_id, array()))
+        ->setConstructorArgs(array(array(), $image_effect_id, array(), $logger))
         ->getMock();
     $image_effect->expects($this->any())
         ->method('transformMimeType')