diff --git a/lib/pinchflat/fast_indexing/youtube_api.ex b/lib/pinchflat/fast_indexing/youtube_api.ex
index e6309f5..ef033be 100644
--- a/lib/pinchflat/fast_indexing/youtube_api.ex
+++ b/lib/pinchflat/fast_indexing/youtube_api.ex
@@ -33,7 +33,9 @@ defmodule Pinchflat.FastIndexing.YoutubeApi do
     # Use a well-known public playlist (YouTube's "Popular Right Now" uploads playlist)
     # to test if the API key is valid
     test_playlist_id = "PLrAXtmErZgOeiKm4sgNOknGvNjby9efdf"
-    url = "https://youtube.googleapis.com/youtube/v3/playlistItems?part=id&maxResults=1&playlistId=#{test_playlist_id}&key=#{api_key}"
+
+    url =
+      "https://youtube.googleapis.com/youtube/v3/playlistItems?part=id&maxResults=1&playlistId=#{test_playlist_id}&key=#{api_key}"
 
     case http_client().get(url, accept: "application/json") do
       {:ok, response} ->
diff --git a/lib/pinchflat/fast_indexing/youtube_rss.ex b/lib/pinchflat/fast_indexing/youtube_rss.ex
index cb83fa9..db34c08 100644
--- a/lib/pinchflat/fast_indexing/youtube_rss.ex
+++ b/lib/pinchflat/fast_indexing/youtube_rss.ex
@@ -19,6 +19,15 @@ defmodule Pinchflat.FastIndexing.YoutubeRss do
   @impl YoutubeBehaviour
   def enabled?(), do: true
 
+  @doc """
+  RSS feeds don't use API keys, so this always returns :ok.
+  Used to satisfy the `YoutubeBehaviour` behaviour.
+
+  Returns :ok
+  """
+  @impl YoutubeBehaviour
+  def test_api_key(_api_key), do: :ok
+
   @doc """
   Fetches the recent media IDs from a YouTube RSS feed for a given source.