diff --git a/tests/test_infected_asyncio.py b/tests/test_infected_asyncio.py
index c219a4b..78003f7 100644
--- a/tests/test_infected_asyncio.py
+++ b/tests/test_infected_asyncio.py
@@ -134,8 +134,6 @@ def test_trio_cancels_aio(arb_addr):
             # cancel the nursery shortly after boot
 
             async with tractor.open_nursery() as n:
-                # debug_mode=True
-            # ) as n:
                 portal = await n.run_in_actor(
                     asyncio_actor,
                     target='sleep_forever',
@@ -177,7 +175,7 @@ def test_aio_cancelled_from_aio_causes_trio_cancelled(arb_addr):
         trio.run(main)
 
 
-# TODO:
+# TODO: verify open_channel_from will fail on this..
 async def no_to_trio_in_args():
     pass
 
@@ -186,33 +184,77 @@ async def push_from_aio_task(
 
     sequence: Iterable,
     to_trio: trio.abc.SendChannel,
+    expect_cancel: False,
+    fail_early: bool,
 
 ) -> None:
-    for i in range(100):
-        print(f'asyncio sending {i}')
-        to_trio.send_nowait(i)
-        await asyncio.sleep(0.001)
 
-    print(f'asyncio streamer complete!')
+    try:
+        # sync caller ctx manager
+        to_trio.send_nowait(True)
+
+        for i in sequence:
+            print(f'asyncio sending {i}')
+            to_trio.send_nowait(i)
+            await asyncio.sleep(0.001)
+
+            if i == 50 and fail_early:
+                raise Exception
+
+        print(f'asyncio streamer complete!')
+
+    except asyncio.CancelledError:
+        if not expect_cancel:
+            pytest.fail("aio task was cancelled unexpectedly")
+        raise
+    else:
+        if expect_cancel:
+            pytest.fail("aio task wasn't cancelled as expected!?")
 
 
-async def stream_from_aio():
+async def stream_from_aio(
+
+    exit_early: bool = False,
+    raise_err: bool = False,
+    aio_raise_err: bool = False,
+
+) -> None:
     seq = range(100)
     expect = list(seq)
 
-    async with to_asyncio.open_channel_from(
-        push_from_aio_task,
-        sequence=seq,
-    ) as (first, chan):
+    try:
+        pulled = []
 
-        pulled = [first]
-        async for value in chan:
-            print(f'trio received {value}')
-            pulled.append(value)
+        async with to_asyncio.open_channel_from(
+            push_from_aio_task,
+            sequence=seq,
+            expect_cancel=raise_err or exit_early,
+            fail_early=aio_raise_err,
+        ) as (first, chan):
 
-        assert pulled == expect
+            assert first is True
 
-    print('trio guest mode task completed!')
+            async for value in chan:
+                print(f'trio received {value}')
+                pulled.append(value)
+
+                if value == 50:
+                    if raise_err:
+                        raise Exception
+                    elif exit_early:
+                        break
+    finally:
+
+        if (
+            not raise_err and
+            not exit_early and
+            not aio_raise_err
+        ):
+            assert pulled == expect
+        else:
+            assert pulled == expect[:51]
+
+        print('trio guest mode task completed!')
 
 
 def test_basic_interloop_channel_stream(arb_addr):
@@ -227,14 +269,57 @@ def test_basic_interloop_channel_stream(arb_addr):
     trio.run(main)
 
 
+# TODO: parametrize the above test and avoid the duplication here?
+def test_trio_error_cancels_intertask_chan(arb_addr):
+    async def main():
+        async with tractor.open_nursery() as n:
+            portal = await n.run_in_actor(
+                stream_from_aio,
+                raise_err=True,
+                infect_asyncio=True,
+            )
+            # should trigger remote actor error
+            await portal.result()
 
-# def test_trio_error_cancels_intertask_chan(arb_addr):
-#     ...
-
-
-# def test_trio_cancels_and_channel_exits(arb_addr):
-#     ...
-
-
-# def test_aio_errors_and_channel_propagates(arb_addr):
+    with pytest.raises(RemoteActorError) as excinfo:
+        trio.run(main)
+
+    # ensure boxed error is correct
+    assert excinfo.value.type == Exception
+
+
+def test_trio_closes_early_and_channel_exits(arb_addr):
+    async def main():
+        async with tractor.open_nursery() as n:
+            portal = await n.run_in_actor(
+                stream_from_aio,
+                exit_early=True,
+                infect_asyncio=True,
+            )
+            # should trigger remote actor error
+            await portal.result()
+
+    # should be a quiet exit on a simple channel exit
+    trio.run(main)
+
+
+def test_aio_errors_and_channel_propagates_and_closes(arb_addr):
+    async def main():
+        async with tractor.open_nursery() as n:
+            portal = await n.run_in_actor(
+                stream_from_aio,
+                aio_raise_err=True,
+                infect_asyncio=True,
+            )
+            # should trigger remote actor error
+            await portal.result()
+
+    with pytest.raises(RemoteActorError) as excinfo:
+        trio.run(main)
+
+    # ensure boxed error is correct
+    assert excinfo.value.type == Exception
+
+
+# def test_2way_reqresp(arb_addr):
 #     ...