diff --git a/tests/integration/test_passwords.py b/tests/integration/test_passwords.py
index 477c47a..2c8ba57 100644
--- a/tests/integration/test_passwords.py
+++ b/tests/integration/test_passwords.py
@@ -162,7 +162,8 @@ def test_a_forgotten_password_is_reset_from_the_emailed_link(app, monkeypatch):
         mine = to(sent, f"{name}@example.com", f"{sso_name}@example.com", f"nobody-{uid[:8]}@example.com")
         assert [m["To"] for m in mine] == [f"{name}@example.com"]
         text = mine[0].get_body(("plain",)).get_content()
-        assert name in text and "BST" in text
+        # In the account's zone, not UTC: London's name for it, summer or winter.
+        assert name in text and re.search(r"\d\d:\d\d (BST|GMT)\b", text)
         key = _KEY.search(text).group(1)
 
         page = await (await guest.get(f"/reset/{key}")).get_data(as_text=True)
diff --git a/tests/integration/test_timeline_changes.py b/tests/integration/test_timeline_changes.py
index 146540d..a8a176d 100644
--- a/tests/integration/test_timeline_changes.py
+++ b/tests/integration/test_timeline_changes.py
@@ -29,12 +29,13 @@ async def _user(app, name: str, role: str, tz: str | None = None):
     uid = str(uuid.uuid4())
     async with app.db_sessionmaker() as s:
         async with s.begin():
+            # The session takes its zone from the account on every request.
             s.add(User(id=uid, username=name, email=f"{name}@test", password_hash="x",
-                       role=UserRole(role), is_active=True))
+                       role=UserRole(role), is_active=True, time_zone=tz))
     client = app.test_client()
     async with client.session_transaction() as sess:
         sess.update(user_id=uid, user_role=role, username=name, _csrf="test-token", login_at=time.time(),
-                    **({"tz": tz} if tz else {}))
+                    tz=tz)
     return client, uid