diff --git a/packages/hydrojudge/package.json b/packages/hydrojudge/package.json
index c1902a32e..71a027912 100644
--- a/packages/hydrojudge/package.json
+++ b/packages/hydrojudge/package.json
@@ -1,7 +1,7 @@
 {
     "name": "@hydrooj/hydrojudge",
     "bin": "bin/hydrojudge.js",
-    "version": "2.5.20",
+    "version": "2.5.21",
     "main": "package.json",
     "author": "undefined <i@undefined.moe>",
     "repository": "https://github.com/hydro-dev/Hydro.git",
diff --git a/packages/hydrojudge/src/cases.ts b/packages/hydrojudge/src/cases.ts
index cf9dc76d9..4aa642bf6 100644
--- a/packages/hydrojudge/src/cases.ts
+++ b/packages/hydrojudge/src/cases.ts
@@ -217,9 +217,11 @@ export default async function readCases(folder: string, cfg: Record<string, any>
         throw changeErrorType(e, FormatError);
     }
     let auto = !result.outputs?.length;
-    if (!result.subtasks.length) {
-        auto = !Math.sum(result.subtasks.map((subtask) => subtask.cases.length));
-    } else auto = false;
+    if (auto) {
+        if (result.subtasks.length && !Math.sum(result.subtasks.map((subtask) => subtask.cases.length))) {
+            auto = false;
+        }
+    }
     if (auto) {
         const c = await readAutoCases(folder, args, config, result);
         result.subtasks = c.subtasks;