diff --git a/dns/_asyncbackend.py b/dns/_asyncbackend.py
index f6760fd0..23455db3 100644
--- a/dns/_asyncbackend.py
+++ b/dns/_asyncbackend.py
@@ -71,7 +71,7 @@ async def connect_tcp(self, host, port, timeout, local_address):
 
 
 class Backend:  # pragma: no cover
-    def name(self):
+    def name(self) -> str:
         return "unknown"
 
     async def make_socket(
diff --git a/dns/_asyncio_backend.py b/dns/_asyncio_backend.py
index 6ab168de..99656d44 100644
--- a/dns/_asyncio_backend.py
+++ b/dns/_asyncio_backend.py
@@ -49,7 +49,8 @@ def connection_lost(self, exc):
                 self.recvfrom.set_exception(exc)
 
     def close(self):
-        self.transport.close()
+        if self.transport is not None:
+            self.transport.close()
 
 
 async def _maybe_wait_for(awaitable, timeout):
@@ -147,7 +148,7 @@ def __init__(self, resolver, local_port, bootstrap_address, family):
                 )
 
         async def connect_tcp(
-            self, host, port, timeout, local_address, socket_options=None
+            self, host, port, timeout=None, local_address=None, socket_options=None
         ):  # pylint: disable=signature-differs
             addresses = []
             _, expiration = _compute_times(timeout)
@@ -180,7 +181,7 @@ async def connect_tcp(
             raise httpcore.ConnectError
 
         async def connect_unix_socket(
-            self, path, timeout, socket_options=None
+            self, path, timeout=None, socket_options=None
         ):  # pylint: disable=signature-differs
             raise NotImplementedError
 
@@ -233,7 +234,7 @@ async def make_socket(
                 # proper fix for [#637].
                 source = (dns.inet.any_for_af(af), 0)
             transport, protocol = await loop.create_datagram_endpoint(
-                _DatagramProtocol,
+                _DatagramProtocol,  # pyright: ignore
                 source,
                 family=af,
                 proto=proto,
diff --git a/dns/_trio_backend.py b/dns/_trio_backend.py
index 0ed904dd..bde7e8ba 100644
--- a/dns/_trio_backend.py
+++ b/dns/_trio_backend.py
@@ -121,7 +121,7 @@ def __init__(self, resolver, local_port, bootstrap_address, family):
             self._family = family
 
         async def connect_tcp(
-            self, host, port, timeout, local_address, socket_options=None
+            self, host, port, timeout=None, local_address=None, socket_options=None
         ):  # pylint: disable=signature-differs
             addresses = []
             _, expiration = _compute_times(timeout)
@@ -151,13 +151,14 @@ async def connect_tcp(
                     sock = await Backend().make_socket(
                         af, socket.SOCK_STREAM, 0, source, destination, timeout
                     )
+                    assert isinstance(sock, StreamSocket)
                     return _CoreTrioStream(sock.stream)
                 except Exception:
                     continue
             raise httpcore.ConnectError
 
         async def connect_unix_socket(
-            self, path, timeout, socket_options=None
+            self, path, timeout=None, socket_options=None
         ):  # pylint: disable=signature-differs
             raise NotImplementedError
 
@@ -211,6 +212,7 @@ async def make_socket(
             if socktype == socket.SOCK_STREAM or destination is not None:
                 connected = False
                 with _maybe_timeout(timeout):
+                    assert destination is not None
                     await s.connect(_lltuple(destination, af))
                     connected = True
                 if not connected:
diff --git a/pyproject.toml b/pyproject.toml
index 2c78aad0..d7d72e10 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -119,9 +119,4 @@ ignore_missing_imports = true
 
 [tool.pyright]
 reportUnsupportedDunderAll = false
-exclude = [
-    "dns/_*_backend.py",
-    "dns/quic/*.py",
-    "examples/*.py",
-    "tests/*.py",
-] # (mostly) temporary!
+exclude = ["dns/quic/*.py", "examples/*.py", "tests/*.py"] # (mostly) temporary!