diff --git a/tests/test_advanced_streaming.py b/tests/test_advanced_streaming.py
index b3e2bc1..d38f243 100644
--- a/tests/test_advanced_streaming.py
+++ b/tests/test_advanced_streaming.py
@@ -4,12 +4,17 @@ Advanced streaming patterns using bidirectional streams and contexts.
 '''
 from collections import Counter
 import itertools
+import platform
 from typing import Set, Dict, List
 
 import trio
 import tractor
 
 
+def is_win():
+    return platform.system() == 'Windows'
+
+
 _registry: Dict[str, Set[tractor.ReceiveMsgStream]] = {
     'even': set(),
     'odd': set(),
@@ -173,14 +178,22 @@ async def one_task_streams_and_one_handles_reqresp(
 
 
 def test_reqresp_ontopof_streaming():
-    '''Test a subactor that both streams with one task and
+    '''
+    Test a subactor that both streams with one task and
     spawns another which handles a small requests-response
     dialogue over the same bidir-stream.
 
     '''
     async def main():
 
-        with trio.move_on_after(2):
+        # flat to make sure we get at least one pong
+        got_pong: bool = False
+        timeout: int = 2
+
+        if is_win():  # smh
+            timeout = 4
+
+        with trio.move_on_after(timeout):
             async with tractor.open_nursery() as n:
 
                 # name of this actor will be same as target func
@@ -189,9 +202,6 @@ def test_reqresp_ontopof_streaming():
                     enable_modules=[__name__]
                 )
 
-                # flat to make sure we get at least one pong
-                got_pong: bool = False
-
                 async with portal.open_context(
                     one_task_streams_and_one_handles_reqresp,
 
@@ -243,8 +253,12 @@ def test_sigint_both_stream_types():
     side-by-side will cancel correctly from SIGINT.
 
     '''
+    timeout: float = 2
+    if is_win():  # smh
+        timeout += 1
+
     async def main():
-        with trio.fail_after(2):
+        with trio.fail_after(timeout):
             async with tractor.open_nursery() as n:
                 # name of this actor will be same as target func
                 portal = await n.start_actor(
diff --git a/tests/test_cancellation.py b/tests/test_cancellation.py
index 4144859..e709531 100644
--- a/tests/test_cancellation.py
+++ b/tests/test_cancellation.py
@@ -15,6 +15,10 @@ import tractor
 from conftest import tractor_test, no_windows
 
 
+def is_win():
+    return platform.system() == 'Windows'
+
+
 async def assert_err(delay=0):
     await trio.sleep(delay)
     assert 0
@@ -332,10 +336,12 @@ async def spawn_and_error(breadth, depth) -> None:
 
 @tractor_test
 async def test_nested_multierrors(loglevel, start_method):
-    """Test that failed actor sets are wrapped in `trio.MultiError`s.
-    This test goes only 2 nurseries deep but we should eventually have tests
+    '''
+    Test that failed actor sets are wrapped in `trio.MultiError`s. This
+    test goes only 2 nurseries deep but we should eventually have tests
     for arbitrary n-depth actor trees.
-    """
+
+    '''
     if start_method == 'trio':
         depth = 3
         subactor_breadth = 2
@@ -364,7 +370,7 @@ async def test_nested_multierrors(loglevel, start_method):
             for subexc in err.exceptions:
 
                 # verify first level actor errors are wrapped as remote
-                if platform.system() == 'Windows':
+                if is_win():
 
                     # windows is often too slow and cancellation seems
                     # to happen before an actor is spawned
@@ -397,15 +403,21 @@ async def test_nested_multierrors(loglevel, start_method):
                     # XXX not sure what's up with this..
                     # on windows sometimes spawning is just too slow and
                     # we get back the (sent) cancel signal instead
-                    if platform.system() == 'Windows':
+                    if is_win():
                         if isinstance(subexc, tractor.RemoteActorError):
-                            assert subexc.type in (trio.MultiError, tractor.RemoteActorError)
+                            assert subexc.type in (
+                                trio.MultiError,
+                                tractor.RemoteActorError
+                            )
                         else:
                             assert isinstance(subexc, trio.MultiError)
                     else:
                         assert subexc.type is trio.MultiError
                 else:
-                    assert subexc.type in (tractor.RemoteActorError, trio.Cancelled)
+                    assert subexc.type in (
+                        tractor.RemoteActorError,
+                        trio.Cancelled
+                    )
 
 
 @no_windows
@@ -443,6 +455,9 @@ def test_cancel_via_SIGINT_other_task(
     from a seperate ``trio`` child  task.
     """
     pid = os.getpid()
+    timeout: float = 2
+    if is_win():  # smh
+        timeout += 1
 
     async def spawn_and_sleep_forever(task_status=trio.TASK_STATUS_IGNORED):
         async with tractor.open_nursery() as tn:
@@ -456,7 +471,7 @@ def test_cancel_via_SIGINT_other_task(
 
     async def main():
         # should never timeout since SIGINT should cancel the current program
-        with trio.fail_after(2):
+        with trio.fail_after(timeout):
             async with trio.open_nursery() as n:
                 await n.start(spawn_and_sleep_forever)
                 if spawn_backend == 'mp':
@@ -524,6 +539,10 @@ def test_fast_graceful_cancel_when_spawn_task_in_soft_proc_wait_for_daemon(
 
     '''
     kbi_delay = 0.5
+    timeout: float = 2.9
+
+    if is_win():  # smh
+        timeout += 1
 
     async def main():
         start = time.time()
@@ -548,7 +567,7 @@ def test_fast_graceful_cancel_when_spawn_task_in_soft_proc_wait_for_daemon(
                     await p.run(do_nuthin)
         finally:
             duration = time.time() - start
-            if duration > 2.9:
+            if duration > timeout:
                 raise trio.TooSlowError(
                     'daemon cancel was slower then necessary..'
                 )