test: improve coverage on removeListeners functions

PR-URL: https://github.com/nodejs/node/pull/11140
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Italo A. Casas <me@italoacasas.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/test/parallel/test-event-emitter-remove-all-listeners.js b/test/parallel/test-event-emitter-remove-all-listeners.js
index d7865b09ab..e793cedb0d 100644
--- a/test/parallel/test-event-emitter-remove-all-listeners.js
+++ b/test/parallel/test-event-emitter-remove-all-listeners.js
@@ -82,3 +82,9 @@ function listener() {}
   const ee = new events.EventEmitter();
   assert.deepStrictEqual(ee, ee.removeAllListeners());
 }
+
+{
+  const ee = new events.EventEmitter();
+  ee._events = undefined;
+  assert.strictEqual(ee, ee.removeAllListeners());
+}