diff --git a/tests/asyncio/test_asyncio_server.py b/tests/asyncio/test_asyncio_server.py
index 8d0b2e0..29c702c 100644
--- a/tests/asyncio/test_asyncio_server.py
+++ b/tests/asyncio/test_asyncio_server.py
@@ -229,6 +229,13 @@ class TestAsyncServer(unittest.TestCase):
         s.eio.send.mock.assert_called_once_with(
             '123', '2/foo,["my event",["foo","bar"]]', binary=False)
 
+    def test_emit_internal_with_none(self, eio):
+        eio.return_value.send = AsyncMock()
+        s = asyncio_server.AsyncServer()
+        _run(s._emit_internal('123', 'my event', None, namespace='/foo'))
+        s.eio.send.mock.assert_called_once_with(
+            '123', '2/foo,["my event"]', binary=False)
+
     def test_emit_internal_with_callback(self, eio):
         eio.return_value.send = AsyncMock()
         s = asyncio_server.AsyncServer()
diff --git a/tests/common/test_server.py b/tests/common/test_server.py
index abecaf0..38fbb08 100644
--- a/tests/common/test_server.py
+++ b/tests/common/test_server.py
@@ -219,6 +219,12 @@ class TestServer(unittest.TestCase):
                                            '2/foo,["my event",["foo","bar"]]',
                                            binary=False)
 
+    def test_emit_internal_with_none(self, eio):
+        s = server.Server()
+        s._emit_internal('123', 'my event', None, namespace='/foo')
+        s.eio.send.assert_called_once_with('123', '2/foo,["my event"]',
+                                           binary=False)
+
     def test_emit_internal_with_callback(self, eio):
         s = server.Server()
         id = s.manager._generate_ack_id('123', '/foo', 'cb')