diff --git a/ably/executer/eventloop.py b/ably/executer/eventloop.py
index aca47b66..9b6bd111 100644
--- a/ably/executer/eventloop.py
+++ b/ably/executer/eventloop.py
@@ -30,6 +30,21 @@ def create() -> 'AppEventLoop':
         app_loop.is_active = True
         return app_loop
 
+    def run_sync(self, coro):
+        # todo - can only handle run_sync from different thread than app_loop
+        # caller_eventloop = None
+        # try:
+        #     caller_eventloop: events = asyncio.get_running_loop()
+        # except Exception:
+        #     pass
+        # Handle calls from app eventloop on the same loop, return awaitable
+        # if caller_eventloop is not None and caller_eventloop == self.loop:
+        #     task = self.loop.create_task(coro)
+        #     task.add_done_callback
+
+        future = asyncio.run_coroutine_threadsafe(coro, self.loop)
+        return future.result()
+
     def close(self) -> events:
         if self.loop is not None and self.loop.is_running():
             self.loop.call_soon_threadsafe(self.loop.stop)
diff --git a/test/ably/sync/sync_restchannelpublish_test.py b/test/ably/sync/sync_restchannelpublish_test.py
index f0ccd371..7becbc9b 100644
--- a/test/ably/sync/sync_restchannelpublish_test.py
+++ b/test/ably/sync/sync_restchannelpublish_test.py
@@ -10,7 +10,7 @@
 import msgpack
 import pytest
 
-from ably import AblyException, IncompatibleClientIdException
+from ably import AblyException, IncompatibleClientIdException, AblyRest
 from ably import api_version
 from ably.rest.auth import Auth
 from ably.types.message import Message
@@ -522,14 +522,15 @@ def test_idempotent_mixed_ids(self):
         assert request_body[0]['id'] == 'foobar'
         assert 'id' not in request_body[1]
 
-    def get_ably_rest(self, *args, **kwargs):
+    def get_ably_rest(self, *args, **kwargs) -> AblyRest:
         kwargs['use_binary_protocol'] = self.use_binary_protocol
         return TestAppSync.get_ably_rest(*args, **kwargs)
 
     # RSL1k4
     def test_idempotent_library_generated_retry(self):
         test_vars = TestAppSync.get_test_vars()
-        ably = self.get_ably_rest(idempotent_rest_publishing=True, fallback_hosts=[test_vars["host"]] * 3)
+        ably: AblyRest = self.get_ably_rest(idempotent_rest_publishing=True,
+                                            fallback_hosts=[test_vars["host"]] * 3)
         channel = ably.channels[self.get_channel_name()]
 
         state = {'failures': 0}
@@ -550,7 +551,8 @@ async def side_effect(*args, **kwargs):
         assert state['failures'] == 2
         history = channel.history()
         assert len(history.items) == 1
-        client.aclose()
+
+        ably.app_loop.run_sync(client.aclose())
         ably.close()
 
     # RSL1k5