1 files changed, 2 insertions, 2 deletions
diff --git a/std/io/ioutil_test.ts b/std/io/ioutil_test.ts
index d00986da5..bb01811ad 100644
--- a/std/io/ioutil_test.ts
+++ b/std/io/ioutil_test.ts
@@ -73,7 +73,7 @@ Deno.test(function testSliceLongToBytes2(): void {
 Deno.test(async function testCopyN1(): Promise<void> {
   const w = new Buffer();
   const r = stringsReader("abcdefghij");
-  const n = await copyN(w, r, 3);
+  const n = await copyN(r, w, 3);
   assertEquals(n, 3);
   assertEquals(w.toString(), "abc");
 });
@@ -81,7 +81,7 @@ Deno.test(async function testCopyN1(): Promise<void> {
 Deno.test(async function testCopyN2(): Promise<void> {
   const w = new Buffer();
   const r = stringsReader("abcdefghij");
-  const n = await copyN(w, r, 11);
+  const n = await copyN(r, w, 11);
   assertEquals(n, 10);
   assertEquals(w.toString(), "abcdefghij");
 });