diff --git a/main_test.ts b/main_test.ts
index d99cfcc..69a9c8c 100644
--- a/main_test.ts
+++ b/main_test.ts
@@ -26,7 +26,7 @@ Deno.test("Download ISO file test", async () => {
   );
 });
 
-Deno.test("Download ISO file test", async () => {
+Deno.test("Breakpoint continuation test", async () => {
   const url =
     "https://mirrors.tuna.tsinghua.edu.cn/debian-cd/12.9.0-live/amd64/iso-hybrid/debian-live-12.9.0-amd64-kde.iso";
   const dirpath = ".";
@@ -45,6 +45,13 @@ Deno.test("Download ISO file test", async () => {
     dirpath,
     threads,
     startChunk: 700,
+    endChunk: 1400,
+  });
+  await download({
+    url,
+    dirpath,
+    threads,
+    startChunk: 1400,
   });
   console.timeEnd("Download ISO file test");