diff --git a/tests/gateway/test_discord_document_handling.py b/tests/gateway/test_discord_document_handling.py
index c9f8f53c2835..39b69dedca20 100644
--- a/tests/gateway/test_discord_document_handling.py
+++ b/tests/gateway/test_discord_document_handling.py
@@ -97,6 +97,9 @@ def _redirect_cache(tmp_path, monkeypatch):
 def adapter(monkeypatch):
     monkeypatch.setattr(discord_platform.discord, "DMChannel", FakeDMChannel, raising=False)
     monkeypatch.setattr(discord_platform.discord, "Thread", FakeThread, raising=False)
+    # These tests mock the actual download. Do not let host DNS/proxy mappings
+    # for cdn.discordapp.com decide whether document handling is exercised.
+    monkeypatch.setattr(discord_platform, "is_safe_url", lambda _url: True)
 
     config = PlatformConfig(enabled=True, token="fake-token")
     a = DiscordAdapter(config)