diff --git a/webdriver/tests/bidi/network/before_request_sent/before_request_sent.py b/webdriver/tests/bidi/network/before_request_sent/before_request_sent.py
index c79f35d431cac5..ad353e61a440e5 100644
--- a/webdriver/tests/bidi/network/before_request_sent/before_request_sent.py
+++ b/webdriver/tests/bidi/network/before_request_sent/before_request_sent.py
@@ -2,6 +2,7 @@
 from urllib.parse import urlencode
 
 import pytest
+import pytest_asyncio
 
 from webdriver.bidi.modules.script import ContextTarget
 
@@ -22,6 +23,11 @@
 pytestmark = pytest.mark.asyncio
 
 
+@pytest_asyncio.fixture(autouse=True)
+async def delete_cookies(bidi_session):
+    await bidi_session.storage.delete_cookies()
+
+
 async def test_subscribe_status(bidi_session, subscribe_events, top_context, wait_for_event, wait_for_future_safe, url, fetch):
     await subscribe_events(events=[BEFORE_REQUEST_SENT_EVENT])
 
@@ -243,7 +249,6 @@ async def test_request_cookies(
                 "httpOnly": False,
                 "name": "foo",
                 "path": "/",
-                "sameSite": "default",
                 "secure": False,
                 "size": 6,
                 "value": {"type": "string", "value": "bar"},
@@ -274,7 +279,6 @@ async def test_request_cookies(
                 "httpOnly": False,
                 "name": "foo",
                 "path": "/",
-                "sameSite": "default",
                 "secure": False,
                 "size": 6,
                 "value": {"type": "string", "value": "bar"},
@@ -283,7 +287,6 @@ async def test_request_cookies(
                 "httpOnly": False,
                 "name": "fuu",
                 "path": "/",
-                "sameSite": "default",
                 "secure": False,
                 "size": 6,
                 "value": {"type": "string", "value": "baz"},
@@ -297,8 +300,6 @@ async def test_request_cookies(
         expected_event={"request": expected_request, "redirectCount": 0},
     )
 
-    await bidi_session.storage.delete_cookies()
-
 
 async def test_request_cookie_same_name_different_host(
     bidi_session,
@@ -351,7 +352,6 @@ async def test_request_cookie_same_name_different_host(
                 "httpOnly": False,
                 "name": "foo",
                 "path": "/webdriver/tests/bidi/network/support",
-                "sameSite": "default",
                 "secure": False,
                 "size": 6,
                 "value": {"type": "string", "value": "bar"},
@@ -365,8 +365,6 @@ async def test_request_cookie_same_name_different_host(
         expected_event={"request": expected_request, "redirectCount": 0},
     )
 
-    await bidi_session.storage.delete_cookies()
-
 
 async def test_request_timing_info(
     bidi_session,