diff --git a/asystgrade/tests/quiz_api_test.php b/asystgrade/tests/quiz_api_test.php
index 7f9d6e5cadae7e175c003120dfc3ff8dd4d97cc6..2c6988b38e22c325b115eaa529fc4103074ae5e5 100755
--- a/asystgrade/tests/quiz_api_test.php
+++ b/asystgrade/tests/quiz_api_test.php
@@ -244,6 +244,7 @@ class quiz_api_test extends advanced_testcase
         // Check the result
         $this->assertNotEmpty($grades);
         $this->assertEquals($grades[0]['predicted_grade'], 'correct');
+        $this->assertEquals($grades[5]['predicted_grade'], 'incorrect');
         $this->assertEquals($grades[6]['predicted_grade'], 'incorrect');
     }