diff --git a/tests/test_infected_asyncio.py b/tests/test_infected_asyncio.py
index 2beac71..ad7758d 100644
--- a/tests/test_infected_asyncio.py
+++ b/tests/test_infected_asyncio.py
@@ -2,10 +2,15 @@
 The most hipster way to force SC onto the stdlib's "async".
 
 '''
+from typing import Optional
 import asyncio
+import builtins
+import importlib
 
 import pytest
+import trio
 import tractor
+from tractor import RemoteActorError
 
 
 async def sleep_and_err():
@@ -13,24 +18,78 @@ async def sleep_and_err():
     assert 0
 
 
-async def asyncio_actor():
-    assert tractor.current_actor().is_infected_aio()
+async def sleep_forever():
+    await asyncio.sleep(float('inf'))
 
-    await tractor.to_asyncio.run_task(sleep_and_err)
+
+async def asyncio_actor(
+
+    target: str,
+    expect_err: Optional[Exception] = None
+
+) -> None:
+
+    assert tractor.current_actor().is_infected_aio()
+    target = globals()[target]
+
+    if '.' in expect_err:
+        modpath, _, name = expect_err.rpartition('.')
+        mod = importlib.import_module(modpath)
+        error = getattr(mod, name)
+    error = builtins.__dict__.get(expect_err)
+
+    try:
+        # spawn an ``asyncio`` task to run a func and return result
+        await tractor.to_asyncio.run_task(target)
+    except Exception as err:
+        if expect_err:
+            assert isinstance(err, error)
+
+        raise
 
 
 def test_aio_simple_error(arb_addr):
+    '''
+    Verify a simple remote asyncio error propagates back through trio
+    to the parent actor.
 
+
+    '''
+    async def main():
+        async with tractor.open_nursery(
+            arbiter_addr=arb_addr
+        ) as n:
+            await n.run_in_actor(
+                asyncio_actor,
+                target='sleep_and_err',
+                expect_err='AssertionError',
+                infect_asyncio=True,
+            )
+
+    with pytest.raises(RemoteActorError) as excinfo:
+        trio.run(main)
+
+    err = excinfo.value
+    assert isinstance(err, RemoteActorError)
+    assert err.type == AssertionError
+
+
+def test_tractor_cancels_aio(arb_addr):
+    '''
+    Verify we can cancel a spawned asyncio task gracefully.
+
+    '''
     async def main():
         async with tractor.open_nursery() as n:
-            await n.run_in_actor(asyncio_actor, infected_asyncio=True)
+            portal = await n.run_in_actor(
+                asyncio_actor,
+                target='sleep_forever',
+                expect_err='asyncio.CancelledError',
+                infect_asyncio=True,
+            )
+            await portal.cancel_actor()
 
-    with pytest.raises(tractor.RemoteActorError) as excinfo:
-        tractor.run(main, arbiter_addr=arb_addr)
-
-
-def test_aio_cancel_from_trio(arb_addr):
-    ...
+    trio.run(main)
 
 
 def test_aio_cancelled_from_aio_causes_trio_cancelled(arb_addr):
@@ -49,10 +108,6 @@ def test_basic_interloop_channel_stream(arb_addr):
     ...
 
 
-def test_basic_interloop_channel_stream(arb_addr):
-    ...
-
-
 def test_trio_cancels_and_channel_exits(arb_addr):
     ...
 
diff --git a/tractor/_actor.py b/tractor/_actor.py
index 47806be..8e5d548 100644
--- a/tractor/_actor.py
+++ b/tractor/_actor.py
@@ -475,6 +475,7 @@ class Actor:
                 self._mods[modpath] = mod
                 if modpath == '__main__':
                     self._mods['__mp_main__'] = mod
+
         except ModuleNotFoundError:
             # it is expected the corresponding `ModuleNotExposed` error
             # will be raised later