diff --git a/app/controller/problem_set_test.go b/app/controller/problem_set_test.go
index b3d2e252..0daf23e5 100644
--- a/app/controller/problem_set_test.go
+++ b/app/controller/problem_set_test.go
@@ -1507,7 +1507,7 @@ func TestGetProblemSetGrades(t *testing.T) {
 				{
 					ID:           databaseProblemSet.Grades[0].ID,
 					UserID:       user1.ID,
-					User:         nil,
+					User:         user1,
 					ProblemSetID: problemSet.ID,
 					ProblemSet:   nil,
 					ClassID:      class.ID,
@@ -1520,7 +1520,7 @@ func TestGetProblemSetGrades(t *testing.T) {
 				{
 					ID:           databaseProblemSet.Grades[1].ID,
 					UserID:       user2.ID,
-					User:         nil,
+					User:         user2,
 					ProblemSetID: problemSet.ID,
 					ProblemSet:   nil,
 					ClassID:      class.ID,
diff --git a/base/utils/problem_set.go b/base/utils/problem_set.go
index 19fc0a31..e59abfdb 100644
--- a/base/utils/problem_set.go
+++ b/base/utils/problem_set.go
@@ -136,7 +136,7 @@ func CreateEmptyGrades(problemSet *models.ProblemSet) error {
 	}
 
 	// json log
-	log.Errorf("Empty detail JSON: %s", emptyDetail)
+	log.Debugf("Empty detail JSON: %s", emptyDetail)
 
 	// Record students who have a grade
 	gradeSet := make(map[uint]bool)