diff --git a/tests/feeds_tests.module b/tests/feeds_tests.module
index 2eea4d7..99b6083 100644
--- a/tests/feeds_tests.module
+++ b/tests/feeds_tests.module
@@ -360,7 +360,7 @@ class FeedsTestsPreprocess {
  *
  * @see feeds_tests_feeds_processor_targets()
  */
-  public static function callback(FeedsSource $source, $target_item, array $target, array &$mapping) {
+  public static function callback(array $target, array &$mapping) {
     $mapping['required_value'] = TRUE;
   }