diff --git a/tests/corpus/6809-node-island-stdio/main.ts b/tests/corpus/6809-node-island-stdio/main.ts
index 209dda8a5..90af5e253 100644
--- a/tests/corpus/6809-node-island-stdio/main.ts
+++ b/tests/corpus/6809-node-island-stdio/main.ts
@@ -10,12 +10,14 @@ process.stdout.write("native write 1\n");
 console.error("native error 1");
 callSync("./stdio.cjs", "big", 200000);
 process.stdout.write(`${"n".repeat(200000)}\n`);
-callSync("./stdio.cjs", "later", 5);
+// The island timer (50 ms) and the native timer (100 ms) are due well
+// after this script and the immediates finish, on a loaded host too.
+callSync("./stdio.cjs", "later", 50);
 setTimeout(() => {
   console.log("native timer log");
   callSync("./stdio.cjs", "write", "2");
   console.error("native timer error");
-}, 10);
+}, 100);
 setImmediate(() => console.log("native immediate log"));
 process.on("exit", () => console.log("native exit listener log"));
 console.log("native log 2");