diff --git a/examples/full_fledged_streaming_service.py b/examples/full_fledged_streaming_service.py
index 31eff62..1650b58 100644
--- a/examples/full_fledged_streaming_service.py
+++ b/examples/full_fledged_streaming_service.py
@@ -7,7 +7,7 @@ import tractor
 async def stream_data(seed):
     for i in range(seed):
         yield i
-        await trio.sleep(0)  # trigger scheduler
+        await trio.sleep(0.0001)  # trigger scheduler
 
 
 # this is the third actor; the aggregator
diff --git a/tests/test_2way.py b/tests/test_2way.py
index c038ae4..410c299 100644
--- a/tests/test_2way.py
+++ b/tests/test_2way.py
@@ -386,7 +386,8 @@ async def cancel_self(
 
 @tractor_test
 async def test_callee_cancels_before_started():
-    '''callee calls `Context.cancel()` while streaming and caller
+    '''
+    Callee calls `Context.cancel()` while streaming and caller
     sees stream terminated in `ContextCancelled`.
 
     '''
@@ -420,9 +421,10 @@ async def simple_rpc(
     data: int,
 
 ) -> None:
-    """Test a small ping-pong server.
+    '''
+    Test a small ping-pong server.
 
-    """
+    '''
     # signal to parent that we're up
     await ctx.started(data + 1)
 
@@ -480,9 +482,10 @@ async def simple_rpc_with_forloop(
     [simple_rpc, simple_rpc_with_forloop],
 )
 def test_simple_rpc(server_func, use_async_for):
-    """The simplest request response pattern.
+    '''
+    The simplest request response pattern.
 
-    """
+    '''
     async def main():
         async with tractor.open_nursery() as n:
 
diff --git a/tests/test_streaming.py b/tests/test_streaming.py
index 38fbee4..baee54e 100644
--- a/tests/test_streaming.py
+++ b/tests/test_streaming.py
@@ -132,7 +132,7 @@ async def stream_data(seed):
         yield i
 
         # trigger scheduler to simulate practical usage
-        await trio.sleep(0)
+        await trio.sleep(0.0001)
 
 
 # this is the third actor; the aggregator
diff --git a/tests/test_task_broadcasting.py b/tests/test_task_broadcasting.py
index b18a40e..4c3d1ff 100644
--- a/tests/test_task_broadcasting.py
+++ b/tests/test_task_broadcasting.py
@@ -83,7 +83,7 @@ async def open_sequence_streamer(
         ) as (ctx, first):
 
             assert first is None
-            async with ctx.open_stream() as stream:
+            async with ctx.open_stream(backpressure=True) as stream:
                 yield stream
 
         await portal.cancel_actor()