diff --git a/tractor/ipc/_shm.py b/tractor/ipc/_shm.py
index 9868ac73..62b26e79 100644
--- a/tractor/ipc/_shm.py
+++ b/tractor/ipc/_shm.py
@@ -50,7 +50,10 @@ if _USE_POSIX:
 try:
     import numpy as np
     from numpy.lib import recfunctions as rfn
-    import nptyping
+    # TODO ruff complains with,
+    # warning| F401: `nptyping` imported but unused; consider using
+    # `importlib.util.find_spec` to test for availability
+    import nptyping  # noqa
 except ImportError:
     pass
 
diff --git a/tractor/ipc/_transport.py b/tractor/ipc/_transport.py
index 1440d453..9dd09a9b 100644
--- a/tractor/ipc/_transport.py
+++ b/tractor/ipc/_transport.py
@@ -157,7 +157,10 @@ class MsgpackTransport(MsgTransport):
 
     ) -> None:
         self.stream = stream
-        self._laddr, self._raddr = self.get_stream_addrs(stream)
+        (
+            self._laddr,
+            self._raddr,
+        ) = self.get_stream_addrs(stream)
 
         # create read loop instance
         self._aiter_pkts = self._iter_packets()
diff --git a/tractor/ipc/_types.py b/tractor/ipc/_types.py
index 3e0e43e5..1b86636d 100644
--- a/tractor/ipc/_types.py
+++ b/tractor/ipc/_types.py
@@ -76,7 +76,7 @@ def transport_from_stream(
     '''
     transport = None
     if isinstance(stream, trio.SocketStream):
-        sock = stream.socket
+        sock: socket.socket = stream.socket
         match sock.family:
             case socket.AF_INET | socket.AF_INET6:
                 transport = 'tcp'