diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index d62e67aa..a53ed54d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -21,6 +21,7 @@ jobs:
           - "3.10"
           - "3.11"
           - "3.12"
+          - "3.13"
           - "pypy-3.8"
           - "pypy-3.9"
           - "pypy-3.10"
@@ -48,6 +49,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
           cache: pip
+          allow-prereleases: true
 
       - name: Install project dependencies
         run: |
diff --git a/tests/integration/conftest.py b/tests/integration/conftest.py
deleted file mode 100644
index 05908e51..00000000
--- a/tests/integration/conftest.py
+++ /dev/null
@@ -1,16 +0,0 @@
-import os
-import ssl
-
-import pytest
-
-
-@pytest.fixture
-def httpbin_ssl_context():
-    ssl_ca_location = os.environ["REQUESTS_CA_BUNDLE"]
-    ssl_cert_location = os.environ["REQUESTS_CA_BUNDLE"].replace("cacert.pem", "cert.pem")
-    ssl_key_location = os.environ["REQUESTS_CA_BUNDLE"].replace("cacert.pem", "key.pem")
-
-    ssl_context = ssl.create_default_context(cafile=ssl_ca_location)
-    ssl_context.load_cert_chain(ssl_cert_location, ssl_key_location)
-
-    return ssl_context
diff --git a/tests/integration/test_aiohttp.py b/tests/integration/test_aiohttp.py
index 7bf5d771..97a489b8 100644
--- a/tests/integration/test_aiohttp.py
+++ b/tests/integration/test_aiohttp.py
@@ -1,7 +1,9 @@
 import logging
+import ssl
 import urllib.parse
 
 import pytest
+import pytest_httpbin.certs
 
 import vcr
 
@@ -11,6 +13,8 @@
 
 from .aiohttp_utils import aiohttp_app, aiohttp_request  # noqa: E402
 
+HTTPBIN_SSL_CONTEXT = ssl.create_default_context(cafile=pytest_httpbin.certs.where())
+
 
 def run_in_loop(fn):
     async def wrapper():
@@ -338,7 +342,7 @@ def test_double_requests(tmpdir, httpbin):
         assert cassette.play_count == 2
 
 
-def test_cookies(httpbin_both, httpbin_ssl_context, tmpdir):
+def test_cookies(httpbin_both, tmpdir):
     async def run(loop):
         cookies_url = httpbin_both.url + (
             "/response-headers?"
@@ -353,12 +357,12 @@ async def run(loop):
         # ------------------------- Record -------------------------- #
         with vcr.use_cassette(tmp) as cassette:
             async with aiohttp.ClientSession(loop=loop, cookie_jar=aiohttp.CookieJar(unsafe=True)) as session:
-                cookies_resp = await session.get(cookies_url, ssl=httpbin_ssl_context)
+                cookies_resp = await session.get(cookies_url, ssl=HTTPBIN_SSL_CONTEXT)
                 home_resp = await session.get(
                     home_url,
                     cookies=req_cookies,
                     headers=req_headers,
-                    ssl=httpbin_ssl_context,
+                    ssl=HTTPBIN_SSL_CONTEXT,
                 )
                 assert cassette.play_count == 0
         assert_responses(cookies_resp, home_resp)
@@ -366,12 +370,12 @@ async def run(loop):
         # -------------------------- Play --------------------------- #
         with vcr.use_cassette(tmp, record_mode=vcr.mode.NONE) as cassette:
             async with aiohttp.ClientSession(loop=loop, cookie_jar=aiohttp.CookieJar(unsafe=True)) as session:
-                cookies_resp = await session.get(cookies_url, ssl=httpbin_ssl_context)
+                cookies_resp = await session.get(cookies_url, ssl=HTTPBIN_SSL_CONTEXT)
                 home_resp = await session.get(
                     home_url,
                     cookies=req_cookies,
                     headers=req_headers,
-                    ssl=httpbin_ssl_context,
+                    ssl=HTTPBIN_SSL_CONTEXT,
                 )
                 assert cassette.play_count == 2
         assert_responses(cookies_resp, home_resp)
@@ -388,7 +392,7 @@ def assert_responses(cookies_resp, home_resp):
     run_in_loop(run)
 
 
-def test_cookies_redirect(httpbin_both, httpbin_ssl_context, tmpdir):
+def test_cookies_redirect(httpbin_both, tmpdir):
     async def run(loop):
         # Sets cookie as provided by the query string and redirects
         cookies_url = httpbin_both.url + "/cookies/set?Cookie_1=Val_1"
@@ -397,7 +401,7 @@ async def run(loop):
         # ------------------------- Record -------------------------- #
         with vcr.use_cassette(tmp) as cassette:
             async with aiohttp.ClientSession(loop=loop, cookie_jar=aiohttp.CookieJar(unsafe=True)) as session:
-                cookies_resp = await session.get(cookies_url, ssl=httpbin_ssl_context)
+                cookies_resp = await session.get(cookies_url, ssl=HTTPBIN_SSL_CONTEXT)
                 assert not cookies_resp.cookies
                 cookies = session.cookie_jar.filter_cookies(cookies_url)
                 assert cookies["Cookie_1"].value == "Val_1"
@@ -408,7 +412,7 @@ async def run(loop):
         # -------------------------- Play --------------------------- #
         with vcr.use_cassette(tmp, record_mode=vcr.mode.NONE) as cassette:
             async with aiohttp.ClientSession(loop=loop, cookie_jar=aiohttp.CookieJar(unsafe=True)) as session:
-                cookies_resp = await session.get(cookies_url, ssl=httpbin_ssl_context)
+                cookies_resp = await session.get(cookies_url, ssl=HTTPBIN_SSL_CONTEXT)
                 assert not cookies_resp.cookies
                 cookies = session.cookie_jar.filter_cookies(cookies_url)
                 assert cookies["Cookie_1"].value == "Val_1"
@@ -422,7 +426,7 @@ async def run(loop):
                 "Cookie_1=Val_1; Expires=Wed, 21 Oct 2015 07:28:00 GMT",
             ]
             async with aiohttp.ClientSession(loop=loop, cookie_jar=aiohttp.CookieJar(unsafe=True)) as session:
-                cookies_resp = await session.get(cookies_url, ssl=httpbin_ssl_context)
+                cookies_resp = await session.get(cookies_url, ssl=HTTPBIN_SSL_CONTEXT)
                 assert not cookies_resp.cookies
                 cookies = session.cookie_jar.filter_cookies(cookies_url)
                 assert cookies["Cookie_1"].value == "Val_1"