1 files changed, 1 insertions, 1 deletions
diff --git a/js/net_test.ts b/js/net_test.ts
index 5b8b80bea..cb9a9163a 100644
--- a/js/net_test.ts
+++ b/js/net_test.ts
@@ -24,7 +24,7 @@ testPerm({ net: true }, async function netCloseWhileAccept() {
 testPerm({ net: true }, async function netConcurrentAccept() {
   const listener = Deno.listen("tcp", ":4502");
   let acceptErrCount = 0;
-  const checkErr = e => {
+  const checkErr = (e): void => {
     assertEquals(e.kind, Deno.ErrorKind.Other);
     if (e.message === "Listener has been closed") {
       assertEquals(acceptErrCount, 1);