diff --git a/core/lib/Drupal/Core/Template/Attribute.php b/core/lib/Drupal/Core/Template/Attribute.php
index 698ce85..cd1c9f0 100644
--- a/core/lib/Drupal/Core/Template/Attribute.php
+++ b/core/lib/Drupal/Core/Template/Attribute.php
@@ -101,10 +101,7 @@ protected function createAttributeValue($name, $value) {
     }
     // Provide a better exception message when invalid object is passed as value.
     elseif (is_object($value)) {
-      throw new \Exception(t('"@attribute_name" attribute value of type "@class" can not be converted to string', array(
-        '@attribute_name' => $name,
-        '@class' => get_class($value)
-      )));
+      throw new \Exception('"' . $name . '" attribute value of type "' . get_class($value) . '" can not be converted to string');
     }
 
     return $value;
diff --git a/core/tests/Drupal/Tests/Core/Template/AttributeTest.php b/core/tests/Drupal/Tests/Core/Template/AttributeTest.php
index 0a83173..7ddb8bb 100644
--- a/core/tests/Drupal/Tests/Core/Template/AttributeTest.php
+++ b/core/tests/Drupal/Tests/Core/Template/AttributeTest.php
@@ -244,7 +244,7 @@ public function createAttributeValuesProvider() {
     $testCases[] = array($name, $value, $result);
 
     // Test AttributeValue instance passed as value.
-    $value = $this->getMock('Drupal\Core\Template\AttributeValueBase');
+    $value = $this->getMock('Drupal\Core\Template\AttributeValueBase', array(), array(), '', FALSE);
     $result = $value;
     $testCases[] = array($name, $value, $result);
 
@@ -305,7 +305,7 @@ public function createAttributeValueExceptionProvider() {
 
     // Test object with render and __toString methods present
     // but it is not instance of AttributeValueBase.
-    $value = $this->getMock('Drupal\Core\StringTranslation\TranslationWrapper');
+    $value = $this->getMock('Drupal\Core\StringTranslation\TranslationWrapper', array(), array(), '', FALSE);
     $testCases[] = array($name, $value);
 
     return $testCases;