diff --git a/repub/web.py b/repub/web.py
index c76d0d2..b2783e5 100644
--- a/repub/web.py
+++ b/repub/web.py
@@ -4,7 +4,7 @@ import asyncio
 import hashlib
 from collections.abc import AsyncGenerator, Awaitable, Callable
 from contextlib import suppress
-from datetime import UTC, datetime, timedelta
+from datetime import timedelta
 from pathlib import Path
 from typing import TypedDict, cast
 from urllib.parse import urlparse
@@ -590,23 +590,7 @@ def _load_sidebar_counts(app: Quart) -> dict[str, int]:
 def _rss_feed_response(feed_text: str | None) -> Response:
     if feed_text is None:
         return Response(status=404)
-    etag = hashlib.sha256(feed_text.encode("utf-8")).hexdigest()
-    if request.if_none_match.contains(etag):
-        response = Response(status=304)
-    else:
-        response = Response(
-            feed_text,
-            content_type="application/rss+xml; charset=utf-8",
-        )
-    response.set_etag(etag)
-    response.cache_control.public = True
-    response.cache_control.max_age = 300
-    response.expires = datetime.now(UTC) + timedelta(minutes=5)
-    response.vary.add("Host")
-    response.headers["Access-Control-Allow-Origin"] = "*"
-    response.headers["Access-Control-Allow-Methods"] = "GET, HEAD, OPTIONS"
-    response.headers["Access-Control-Allow-Headers"] = "*"
-    return response
+    return Response(feed_text, mimetype="application/rss+xml")
 
 
 def _read_feed_text(*, feeds_dir: Path, feed_path: str) -> str | None:
diff --git a/tests/test_dev_mode.py b/tests/test_dev_mode.py
index 0e68f34..ae84740 100644
--- a/tests/test_dev_mode.py
+++ b/tests/test_dev_mode.py
@@ -133,42 +133,5 @@ def test_published_rss_rewrites_feed_url_to_https_host_header(
             "<link>https://example.com/article</link>"
             "</channel></rss>\n"
         )
-        assert response.headers["Access-Control-Allow-Origin"] == "*"
-        assert response.headers["Access-Control-Allow-Methods"] == "GET, HEAD, OPTIONS"
-        assert response.headers["Access-Control-Allow-Headers"] == "*"
-        assert response.cache_control.public is True
-        assert response.cache_control.max_age == 300
-        assert response.headers["ETag"] != ""
-
-    asyncio.run(run())
-
-
-def test_published_rss_supports_conditional_requests(
-    monkeypatch, tmp_path: Path
-) -> None:
-    db_path = tmp_path / "conditional-rss.db"
-    feeds_dir = tmp_path / "out" / "feeds"
-    monkeypatch.setenv("REPUBLISHER_DB_PATH", str(db_path))
-
-    async def run() -> None:
-        app = create_app()
-        app.config["REPUB_FEEDS_DIR"] = feeds_dir
-        feed_path = feeds_dir / "demo-source" / "feed.rss"
-        feed_path.parent.mkdir(parents=True)
-        feed_path.write_text(
-            "<rss><channel><title>Demo</title></channel></rss>\n", encoding="utf-8"
-        )
-
-        client = app.test_client()
-        first_response = await client.get("/feeds/demo-source/feed.rss")
-        etag = first_response.headers["ETag"]
-        second_response = await client.get(
-            "/feeds/demo-source/feed.rss",
-            headers={"If-None-Match": etag},
-        )
-
-        assert second_response.status_code == 304
-        assert await second_response.get_data(as_text=True) == ""
-        assert second_response.headers["ETag"] == etag
 
     asyncio.run(run())