diff --git a/.gitea/workflows/publish.yml b/.gitea/workflows/publish.yml
index 500f1ac..6548d51 100644
--- a/.gitea/workflows/publish.yml
+++ b/.gitea/workflows/publish.yml
@@ -46,6 +46,11 @@ jobs:
           npm ci
           npm run build
 
+      - name: Install Chinese PDF font for backend tests
+        run: |
+          sudo apt-get update
+          sudo apt-get install --yes fonts-noto-cjk
+
       - name: Run backend tests
         run: dotnet test Jiaowu.slnx --configuration Release
 
diff --git a/tests/Jiaowu.Api.Tests/CourseGradeStatisticsCronSchedulerTests.cs b/tests/Jiaowu.Api.Tests/CourseGradeStatisticsCronSchedulerTests.cs
index a63e6ee..ef99fda 100644
--- a/tests/Jiaowu.Api.Tests/CourseGradeStatisticsCronSchedulerTests.cs
+++ b/tests/Jiaowu.Api.Tests/CourseGradeStatisticsCronSchedulerTests.cs
@@ -124,6 +124,15 @@ public sealed class CourseGradeStatisticsRefreshSchedulerTests
         db.TeachingTaskGradeStatistics.AddRange(
             FreshStatistic(firstSheet, course, term),
             FreshStatistic(secondSheet, course, term));
+        db.StudentAcademicStatistics.Add(new StudentAcademicStatistic
+        {
+            StudentId = student.Id,
+            CourseCount = 2,
+            Gpa = 3m,
+            WeightedAverageScore = 85m,
+            AverageScore = 85m,
+            CalculatedAt = DateTime.UtcNow.AddMinutes(1)
+        });
         await db.SaveChangesAsync();
 
         var queuedAfterFreshStatistics = await scheduler.EnqueueStaleAsync(