diff --git a/test/simple/test-tty-stdout-end.js b/test/simple/test-tty-stdout-end.js
index 7c7f7feb2ba..1fc27906834 100644
--- a/test/simple/test-tty-stdout-end.js
+++ b/test/simple/test-tty-stdout-end.js
@@ -30,7 +30,7 @@ try {
 } catch (e) {
   exceptionCaught = true;
   assert.ok(common.isError(e));
-  assert.equal('process.stdout cannot be closed', e.message);
+  assert.equal('process.stdout cannot be closed.', e.message);
 }
 
 assert.ok(exceptionCaught);