diff --git a/tests/feeds_mapper_test.inc b/tests/feeds_mapper_test.inc
index 8faead308488f0b49467a1b9c5ec359906166e45..1012199ff09a89e88a07065483e3e3c9f5659f90 100644
--- a/tests/feeds_mapper_test.inc
+++ b/tests/feeds_mapper_test.inc
@@ -6,6 +6,9 @@
  * Helper class with auxiliary functions for feeds mapper module tests.
  */
 
+// Require FeedsWebTestCase class definition.
+require_once(dirname(__FILE__) .'/feeds.test.inc');
+
 /**
  * Base class for implementing Feeds Mapper test cases.
  */