diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 4eb6d67..39534a5 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -7,12 +7,12 @@ repos:
     -   id: check-yaml
     -   id: check-added-large-files
 -   repo: https://github.com/editorconfig-checker/editorconfig-checker.python
-    rev: '2.7.3'
+    rev: '3.0.3'
     hooks:
     -   id: editorconfig-checker
         alias: ec
 -   repo: https://github.com/pycqa/flake8
-    rev: '7.1.0'
+    rev: '7.1.1'
     hooks:
     -   id: flake8
 -   repo: https://github.com/pycqa/isort
@@ -21,7 +21,7 @@ repos:
     -   id: isort
         name: isort (python)
 -   repo: https://github.com/psf/black
-    rev: 24.4.2
+    rev: 24.8.0
     hooks:
     -   id: black
 -   repo: https://github.com/asottile/pyupgrade
@@ -30,6 +30,6 @@ repos:
     -   id: pyupgrade
         args: [--py37-plus]
 -   repo: https://github.com/jendrikseipp/vulture
-    rev: 'v2.11'
+    rev: 'v2.12'
     hooks:
     -   id: vulture
diff --git a/README.md b/README.md
index 9d6fdda..34b5bdc 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ tests to ensure network calls are prevented.
 
 ## Requirements
 
-- [Pytest](https://github.com/pytest-dev/pytest) 6.2.5 or greater
+- [Pytest](https://github.com/pytest-dev/pytest) 7.0 or greater
 
 ## Installation
 
@@ -43,21 +43,21 @@ Run `pytest --disable-socket`, tests should fail on any access to `socket` or
 libraries using socket with a `SocketBlockedError`.
 
 To add this flag as the default behavior, add this section to your
-[`pytest.ini`](https://docs.pytest.org/en/6.2.x/customize.html#pytest-ini):
+[`pytest.ini`](https://docs.pytest.org/en/stable/reference/customize.html#pytest-ini):
 
 ```ini
 [pytest]
 addopts = --disable-socket
 ```
 
-or add this to your [`setup.cfg`](https://docs.pytest.org/en/6.2.x/customize.html#setup-cfg):
+or add this to your [`setup.cfg`](https://docs.pytest.org/en/stable/reference/customize.html#setup-cfg):
 
 ```ini
 [tool:pytest]
 addopts = --disable-socket
 ```
 
-or update your [`conftest.py`](https://docs.pytest.org/en/6.2.x/writing_plugins.html#conftest-py-plugins) to include:
+or update your [`conftest.py`](https://docs.pytest.org/en/stable/how-to/writing_plugins.html#conftest-py-local-per-directory-plugins) to include:
 
 ```python
 from pytest_socket import disable_socket
diff --git a/poetry.lock b/poetry.lock
index 659b956..984a619 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -292,63 +292,83 @@ files = [
 
 [[package]]
 name = "coverage"
-version = "7.6.0"
+version = "7.6.1"
 description = "Code coverage measurement for Python"
 optional = false
 python-versions = ">=3.8"
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+    {file = "coverage-7.6.1-cp39-cp39-win_amd64.whl", hash = "sha256:06a737c882bd26d0d6ee7269b20b12f14a8704807a01056c80bb881a4b2ce6ca"},
+    {file = "coverage-7.6.1-pp38.pp39.pp310-none-any.whl", hash = "sha256:e9a6e0eb86070e8ccaedfbd9d38fec54864f3125ab95419970575b42af7541df"},
+    {file = "coverage-7.6.1.tar.gz", hash = "sha256:953510dfb7b12ab69d20135a0662397f077c59b1e6379a768e97c59d852ee51d"},
 ]
 
 [package.extras]
@@ -633,13 +653,13 @@ trio = ["trio (>=0.22.0,<0.23.0)"]
 
 [[package]]
 name = "httpx"
-version = "0.27.0"
+version = "0.27.2"
 description = "The next generation HTTP client."
 optional = false
 python-versions = ">=3.8"
 files = [
-    {file = "httpx-0.27.0-py3-none-any.whl", hash = "sha256:71d5465162c13681bff01ad59b2cc68dd838ea1f10e51574bac27103f00c91a5"},
-    {file = "httpx-0.27.0.tar.gz", hash = "sha256:a0cb88a46f32dc874e04ee956e4c2764aba2aa228f650b06788ba6bda2962ab5"},
+    {file = "httpx-0.27.2-py3-none-any.whl", hash = "sha256:7bb2708e112d8fdd7829cd4243970f0c223274051cb35ee80c03301ee29a3df0"},
+    {file = "httpx-0.27.2.tar.gz", hash = "sha256:f7c2be1d2f3c3c3160d441802406b206c2b76f5947b11115e6df10c6c65e66c2"},
 ]
 
 [package.dependencies]
@@ -654,6 +674,7 @@ brotli = ["brotli", "brotlicffi"]
 cli = ["click (==8.*)", "pygments (==2.*)", "rich (>=10,<14)"]
 http2 = ["h2 (>=3,<5)"]
 socks = ["socksio (==1.*)"]
+zstd = ["zstandard (>=0.18.0)"]
 
 [[package]]
 name = "idna"
@@ -910,13 +931,13 @@ files = [
 
 [[package]]
 name = "pytest"
-version = "8.3.2"
+version = "8.3.3"
 description = "pytest: simple powerful testing with Python"
 optional = false
 python-versions = ">=3.8"
 files = [
-    {file = "pytest-8.3.2-py3-none-any.whl", hash = "sha256:4ba08f9ae7dcf84ded419494d229b48d0903ea6407b030eaec46df5e6a73bba5"},
-    {file = "pytest-8.3.2.tar.gz", hash = "sha256:c132345d12ce551242c87269de812483f5bcc87cdbb4722e48487ba194f9fdce"},
+    {file = "pytest-8.3.3-py3-none-any.whl", hash = "sha256:a6853c7375b2663155079443d2e45de913a911a11d669df02a50814944db57b2"},
+    {file = "pytest-8.3.3.tar.gz", hash = "sha256:70b98107bd648308a7952b06e6ca9a50bc660be218d53c257cc1fc94fda10181"},
 ]
 
 [package.dependencies]
@@ -932,20 +953,20 @@ dev = ["argcomplete", "attrs (>=19.2)", "hypothesis (>=3.56)", "mock", "pygments
 
 [[package]]
 name = "pytest-httpbin"
-version = "2.0.0"
+version = "2.1.0"
 description = "Easily test your HTTP library against a local copy of httpbin"
 optional = false
-python-versions = ">=3.7"
+python-versions = ">=3.8"
 files = [
-    {file = "pytest-httpbin-2.0.0.tar.gz", hash = "sha256:3e739cad9b8f8df58952df7329d9295fe17449d3a647f49c4ce634fd81d71b8e"},
-    {file = "pytest_httpbin-2.0.0-py2.py3-none-any.whl", hash = "sha256:d977f8095796e27a45911bbafa3587c081c9025e060e2fdb559794db2d45e82d"},
+    {file = "pytest_httpbin-2.1.0-py3-none-any.whl", hash = "sha256:b3bf7346cc2ad231447189cd85b458e341056684a7a69d69533dd29692209cdd"},
+    {file = "pytest_httpbin-2.1.0.tar.gz", hash = "sha256:d40579838443228327f9fe4f08d9338bee8885c29fe933e5f2d58c20a26c33c6"},
 ]
 
 [package.dependencies]
 httpbin = "*"
 
 [package.extras]
-test = ["pytest", "requests", "werkzeug (<2.1.0)"]
+test = ["pytest", "requests"]
 
 [[package]]
 name = "pytest-randomly"
@@ -1190,13 +1211,13 @@ files = [
 
 [[package]]
 name = "starlette"
-version = "0.38.2"
+version = "0.39.0"
 description = "The little ASGI library that shines."
 optional = false
 python-versions = ">=3.8"
 files = [
-    {file = "starlette-0.38.2-py3-none-any.whl", hash = "sha256:4ec6a59df6bbafdab5f567754481657f7ed90dc9d69b0c9ff017907dd54faeff"},
-    {file = "starlette-0.38.2.tar.gz", hash = "sha256:c7c0441065252160993a1a37cf2a73bb64d271b17303e0b0c1eb7191cfb12d75"},
+    {file = "starlette-0.39.0-py3-none-any.whl", hash = "sha256:57164a38948018134537d31367fb46ef9be6050a8e955fb4990235960ed03f92"},
+    {file = "starlette-0.39.0.tar.gz", hash = "sha256:b35acedae74e95967dd9c0a47b45f5803dcd8973d0d95c18c1abb184845ba42c"},
 ]
 
 [package.dependencies]
@@ -1280,4 +1301,4 @@ test = ["big-O", "jaraco.functools", "jaraco.itertools", "jaraco.test", "more-it
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.8"
-content-hash = "d54786b029b9e44b9ce0a569b59e33d669f5b803fe6cb9431d144662fb118327"
+content-hash = "7a20ee70565706c74184c14ea534f5fe9b719119727be8c8b7a25fabc9a5aecf"
diff --git a/pyproject.toml b/pyproject.toml
index 2f6cf31..4287d9e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,15 +32,15 @@ classifiers = [
 
 [tool.poetry.dependencies]
 python = "^3.8"
-pytest = ">=6.2.5"
+pytest = ">=7.0.0"
 
 [tool.poetry.dev-dependencies]
 coverage = "^7.6"
-pytest-httpbin = "^2.0.0"
+pytest-httpbin = "^2.1.0"
 pytest-randomly = "^3.15.0"
 requests = "^2.32.3"
-starlette = "^0.38.2"
-httpx = "^0.27.0"
+starlette = "^0.39.0"
+httpx = "^0.27.2"
 # Waiting for new release. See https://github.com/psf/httpbin/issues/35
 httpbin = { git = "https://github.com/psf/httpbin.git", rev = "1f6e0498" }
 
diff --git a/pytest_socket.py b/pytest_socket.py
index 7024c0d..22bdc71 100644
--- a/pytest_socket.py
+++ b/pytest_socket.py
@@ -3,6 +3,7 @@
 import socket
 import typing
 from collections import defaultdict
+from dataclasses import dataclass, field
 
 import pytest
 
@@ -56,7 +57,8 @@ def pytest_addoption(parser):
 @pytest.fixture
 def socket_disabled(pytestconfig):
     """disable socket.socket for duration of this test function"""
-    disable_socket(allow_unix_socket=pytestconfig.__socket_allow_unix_socket)
+    socket_config = pytestconfig.stash[_STASH_KEY]
+    disable_socket(allow_unix_socket=socket_config.allow_unix_socket)
     yield
 
 
@@ -67,6 +69,18 @@ def socket_enabled(pytestconfig):
     yield
 
 
+@dataclass
+class _PytestSocketConfig:
+    socket_disabled: bool
+    socket_force_enabled: bool
+    allow_unix_socket: bool
+    allow_hosts: typing.Union[str, typing.List[str], None]
+    resolution_cache: typing.Dict[str, typing.Set[str]] = field(default_factory=dict)
+
+
+_STASH_KEY = pytest.StashKey[_PytestSocketConfig]()
+
+
 def _is_unix_socket(family) -> bool:
     try:
         is_unix_socket = family == socket.AF_UNIX
@@ -109,10 +123,12 @@ def pytest_configure(config):
     )
 
     # Store the global configs in the `pytest.Config` object.
-    config.__socket_force_enabled = config.getoption("--force-enable-socket")
-    config.__socket_disabled = config.getoption("--disable-socket")
-    config.__socket_allow_unix_socket = config.getoption("--allow-unix-socket")
-    config.__socket_allow_hosts = config.getoption("--allow-hosts")
+    config.stash[_STASH_KEY] = _PytestSocketConfig(
+        socket_force_enabled=config.getoption("--force-enable-socket"),
+        socket_disabled=config.getoption("--disable-socket"),
+        allow_unix_socket=config.getoption("--allow-unix-socket"),
+        allow_hosts=config.getoption("--allow-hosts"),
+    )
 
 
 def pytest_runtest_setup(item) -> None:
@@ -129,12 +145,14 @@ def pytest_runtest_setup(item) -> None:
     if not hasattr(item, "fixturenames"):
         return
 
+    socket_config = item.config.stash[_STASH_KEY]
+
     # If test has the `enable_socket` marker, fixture or
     # it's forced from the CLI, we accept this as most explicit.
     if (
         "socket_enabled" in item.fixturenames
         or item.get_closest_marker("enable_socket")
-        or item.config.__socket_force_enabled
+        or socket_config.socket_force_enabled
     ):
         enable_socket()
         return
@@ -143,27 +161,34 @@ def pytest_runtest_setup(item) -> None:
     if "socket_disabled" in item.fixturenames or item.get_closest_marker(
         "disable_socket"
     ):
-        disable_socket(item.config.__socket_allow_unix_socket)
+        disable_socket(socket_config.allow_unix_socket)
         return
 
     # Resolve `allow_hosts` behaviors.
     hosts = _resolve_allow_hosts(item)
 
     # Finally, check the global config and disable socket if needed.
-    if item.config.__socket_disabled and not hosts:
-        disable_socket(item.config.__socket_allow_unix_socket)
+    if socket_config.socket_disabled and not hosts:
+        disable_socket(socket_config.allow_unix_socket)
 
 
 def _resolve_allow_hosts(item):
     """Resolve `allow_hosts` behaviors."""
+    socket_config = item.config.stash[_STASH_KEY]
+
     mark_restrictions = item.get_closest_marker("allow_hosts")
-    cli_restrictions = item.config.__socket_allow_hosts
+    cli_restrictions = socket_config.allow_hosts
     hosts = None
     if mark_restrictions:
         hosts = mark_restrictions.args[0]
     elif cli_restrictions:
         hosts = cli_restrictions
-    socket_allow_hosts(hosts, allow_unix_socket=item.config.__socket_allow_unix_socket)
+
+    socket_allow_hosts(
+        hosts,
+        allow_unix_socket=socket_config.allow_unix_socket,
+        resolution_cache=socket_config.resolution_cache,
+    )
     return hosts
 
 
@@ -206,20 +231,29 @@ def resolve_hostnames(hostname: str) -> typing.Set[str]:
 
 def normalize_allowed_hosts(
     allowed_hosts: typing.List[str],
+    resolution_cache: typing.Optional[typing.Dict[str, typing.List[str]]] = None,
 ) -> typing.Dict[str, typing.Set[str]]:
     """Map all items in `allowed_hosts` to IP addresses."""
+    if resolution_cache is None:
+        resolution_cache = {}
     ip_hosts = defaultdict(set)
     for host in allowed_hosts:
         host = host.strip()
         if is_ipaddress(host):
             ip_hosts[host].add(host)
-        else:
-            ip_hosts[host].update(resolve_hostnames(host))
+            continue
+        if host not in resolution_cache:
+            resolution_cache[host] = resolve_hostnames(host)
+        ip_hosts[host].update(resolution_cache[host])
 
     return ip_hosts
 
 
-def socket_allow_hosts(allowed=None, allow_unix_socket=False):
+def socket_allow_hosts(
+    allowed: typing.Union[str, typing.List[str], None] = None,
+    allow_unix_socket: bool = False,
+    resolution_cache: typing.Optional[typing.Dict[str, typing.List[str]]] = None,
+) -> None:
     """disable socket.socket.connect() to disable the Internet. useful in testing."""
     if isinstance(allowed, str):
         allowed = allowed.split(",")
@@ -227,7 +261,7 @@ def socket_allow_hosts(allowed=None, allow_unix_socket=False):
     if not isinstance(allowed, list):
         return
 
-    allowed_ip_hosts_by_host = normalize_allowed_hosts(allowed)
+    allowed_ip_hosts_by_host = normalize_allowed_hosts(allowed, resolution_cache)
     allowed_ip_hosts_and_hostnames = set(
         itertools.chain(*allowed_ip_hosts_by_host.values())
     ) | set(allowed_ip_hosts_by_host.keys())
diff --git a/tests/test_restrict_hosts.py b/tests/test_restrict_hosts.py
index 768dd7e..26c8ae9 100644
--- a/tests/test_restrict_hosts.py
+++ b/tests/test_restrict_hosts.py
@@ -1,7 +1,11 @@
+import collections
 import inspect
+import socket
 
 import pytest
 
+from pytest_socket import normalize_allowed_hosts
+
 localhost = "127.0.0.1"
 
 connect_code_template = """
@@ -85,6 +89,25 @@ def assert_socket_connect(should_pass, **kwargs):
     return assert_socket_connect
 
 
+@pytest.fixture
+def getaddrinfo_hosts(monkeypatch):
+    hosts = []
+
+    def _getaddrinfo(host, port, family=0, type=0, proto=0, flags=0):
+        hosts.append(host)
+        v4 = (
+            socket.AF_INET,
+            socket.SOCK_STREAM,
+            socket.IPPROTO_TCP,
+            "",
+            ("127.0.0.127", 0),
+        )
+        return [v4]
+
+    monkeypatch.setattr(socket, "getaddrinfo", _getaddrinfo)
+    return hosts
+
+
 def test_help_message(testdir):
     result = testdir.runpytest(
         "--help",
@@ -298,3 +321,66 @@ def test_fail_2():
     result.assert_outcomes(1, 0, 2)
     assert_host_blocked(result, "2.2.2.2")
     assert_host_blocked(result, httpbin.host)
+
+
+def test_normalize_allowed_hosts(getaddrinfo_hosts):
+    """normalize_allowed_hosts() produces a map of hosts to IP addresses."""
+    assert normalize_allowed_hosts(["127.0.0.1", "localhost", "localhost", "::1"]) == {
+        "::1": {"::1"},
+        "127.0.0.1": {"127.0.0.1"},
+        "localhost": {"127.0.0.127"},
+    }
+
+    assert getaddrinfo_hosts == ["localhost"]
+
+
+def test_normalize_allowed_hosts_cache(getaddrinfo_hosts):
+    """normalize_allowed_hosts() caches name resolutions when passed a cache"""
+    cache = {}
+
+    assert normalize_allowed_hosts(["localhost"], cache) == {
+        "localhost": {"127.0.0.127"}
+    }
+    assert cache == {"localhost": {"127.0.0.127"}}
+    assert getaddrinfo_hosts == ["localhost"]
+
+    del getaddrinfo_hosts[:]
+
+    assert normalize_allowed_hosts(["localhost", "localhost"], cache) == {
+        "localhost": {"127.0.0.127"}
+    }
+    assert cache == {"localhost": {"127.0.0.127"}}
+    assert getaddrinfo_hosts == []
+
+
+def test_name_resolution_cached(testdir, getaddrinfo_hosts):
+    """pytest-socket only resolves each allowed name once."""
+
+    testdir.makepyfile(
+        """
+        import pytest
+        import socket
+
+        @pytest.mark.allow_hosts('name.internal')
+        def test_1():
+            ...
+
+        @pytest.mark.allow_hosts(['name.internal', 'name.another'])
+        def test_2():
+            ...
+
+        @pytest.mark.allow_hosts('name.internal')
+        @pytest.mark.parametrize("i", ["3", "4", "5"])
+        def test_456(i):
+            ...
+        """
+    )
+
+    hooks = testdir.inline_run("--allow-hosts=name.internal,name.internal")
+    [result] = hooks.getcalls("pytest_sessionfinish")
+    assert result.session.testsfailed == 0
+
+    assert collections.Counter(getaddrinfo_hosts) == {
+        "name.internal": 1,
+        "name.another": 1,
+    }