diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 61cf881f..345362fd 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -13,6 +13,7 @@ jobs:
   test:
     runs-on: ${{ matrix.os }}
     strategy:
+      fail-fast: false
       matrix:
         python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
         os: [ubuntu-latest, macos-latest]
diff --git a/README.rst b/README.rst
index fe6c000d..c279822e 100644
--- a/README.rst
+++ b/README.rst
@@ -109,7 +109,7 @@ To build uvloop, you'll need Python 3.8 or greater:
 
    .. code::
 
-    $ python3.7 -m venv uvloop-dev
+    $ python3 -m venv uvloop-dev
     $ source uvloop-dev/bin/activate
 
 3. Install development dependencies:
diff --git a/setup.py b/setup.py
index ba15af50..c369ac80 100644
--- a/setup.py
+++ b/setup.py
@@ -176,7 +176,11 @@ def build_libuv(self):
             cmd,
             cwd=LIBUV_BUILD_DIR, env=env, check=True)
 
-        j_flag = '-j{}'.format(os.cpu_count() or 1)
+        try:
+            njobs = len(os.sched_getaffinity(0))
+        except AttributeError:
+            njobs = os.cpu_count()
+        j_flag = '-j{}'.format(njobs or 1)
         c_flag = "CFLAGS={}".format(env['CFLAGS'])
         subprocess.run(
             ['make', j_flag, c_flag],
diff --git a/tests/test_dns.py b/tests/test_dns.py
index f61b1e8a..66da026b 100644
--- a/tests/test_dns.py
+++ b/tests/test_dns.py
@@ -31,13 +31,13 @@ def _test_getaddrinfo(self, *args, _patch=False, **kwargs):
                 a1 = patched_getaddrinfo(*args, **kwargs)
             else:
                 a1 = socket.getaddrinfo(*args, **kwargs)
-        except socket.gaierror as ex:
+        except (socket.gaierror, UnicodeError) as ex:
             err = ex
 
         try:
             a2 = self.loop.run_until_complete(
                 self.loop.getaddrinfo(*args, **kwargs))
-        except socket.gaierror as ex:
+        except (socket.gaierror, UnicodeError) as ex:
             if err is not None:
                 self.assertEqual(ex.args, err.args)
             else:
@@ -187,6 +187,18 @@ def test_getaddrinfo_20(self):
         self._test_getaddrinfo('127.0.0.1', 80, type=socket.SOCK_STREAM,
                                flags=socket.AI_CANONNAME, _patch=patch)
 
+    # https://github.com/libuv/libuv/security/advisories/GHSA-f74f-cvh7-c6q6
+    # See also: https://github.com/MagicStack/uvloop/pull/600
+    def test_getaddrinfo_21(self):
+        payload = f'0x{"0" * 246}7f000001.example.com'.encode('ascii')
+        self._test_getaddrinfo(payload, 80)
+        self._test_getaddrinfo(payload, 80, type=socket.SOCK_STREAM)
+
+    def test_getaddrinfo_22(self):
+        payload = f'0x{"0" * 246}7f000001.example.com'
+        self._test_getaddrinfo(payload, 80)
+        self._test_getaddrinfo(payload, 80, type=socket.SOCK_STREAM)
+
     ######
 
     def test_getnameinfo_1(self):
diff --git a/tests/test_tcp.py b/tests/test_tcp.py
index 812e62b8..d7a73fbf 100644
--- a/tests/test_tcp.py
+++ b/tests/test_tcp.py
@@ -248,8 +248,9 @@ def test_create_server_4(self):
             addr = sock.getsockname()
 
             with self.assertRaisesRegex(OSError,
-                                        r"error while attempting.*\('127.*: "
-                                        r"address( already)? in use"):
+                                        r"error while attempting.*\('127.*:"
+                                        r"( \[errno \d+\])? address"
+                                        r"( already)? in use"):
 
                 self.loop.run_until_complete(
                     self.loop.create_server(object, *addr))
diff --git a/uvloop/dns.pyx b/uvloop/dns.pyx
index 7aad6319..c6be7cbe 100644
--- a/uvloop/dns.pyx
+++ b/uvloop/dns.pyx
@@ -348,6 +348,11 @@ cdef class AddrInfoRequest(UVRequest):
 
         if host is None:
             chost = NULL
+        elif host == b'' and sys.platform == 'darwin':
+            # It seems `getaddrinfo("", ...)` on macOS is equivalent to
+            # `getaddrinfo("localhost", ...)`. This is inconsistent with
+            # libuv 1.48 which treats empty nodename as EINVAL.
+            chost = <char*>'localhost'
         else:
             chost = <char*>host
 
@@ -356,13 +361,6 @@ cdef class AddrInfoRequest(UVRequest):
         else:
             cport = <char*>port
 
-        if cport is NULL and chost is NULL:
-            self.on_done()
-            msg = system.gai_strerror(socket_EAI_NONAME).decode('utf-8')
-            ex = socket_gaierror(socket_EAI_NONAME, msg)
-            callback(ex)
-            return
-
         memset(&self.hints, 0, sizeof(system.addrinfo))
         self.hints.ai_flags = flags
         self.hints.ai_family = family
@@ -382,7 +380,17 @@ cdef class AddrInfoRequest(UVRequest):
 
         if err < 0:
             self.on_done()
-            callback(convert_error(err))
+            try:
+                if err == uv.UV_EINVAL:
+                    # Convert UV_EINVAL to EAI_NONAME to match libc behavior
+                    msg = system.gai_strerror(socket_EAI_NONAME).decode('utf-8')
+                    ex = socket_gaierror(socket_EAI_NONAME, msg)
+                else:
+                    ex = convert_error(err)
+            except Exception as ex:
+                callback(ex)
+            else:
+                callback(ex)
 
 
 cdef class NameInfoRequest(UVRequest):
diff --git a/vendor/libuv b/vendor/libuv
index f0bb7e40..e9f29cb9 160000
--- a/vendor/libuv
+++ b/vendor/libuv
@@ -1 +1 @@
-Subproject commit f0bb7e40f0508bedf6fad33769b3f87bb8aedfa6
+Subproject commit e9f29cb984231524e3931aa0ae2c5dae1a32884e