diff --git a/youtube-dl/Dockerfile b/youtube-dl/Dockerfile
index a86120da63df9129c545eb26a3a37d587d78100f..020837d50e6c5e8576ce75c661a876913546769b 100644
--- a/youtube-dl/Dockerfile
+++ b/youtube-dl/Dockerfile
@@ -1,4 +1,5 @@
 FROM docker.io/library/debian:testing
+RUN ls -l /etc/apt/trusted.gpg.d
 # hadolint ignore=DL3008,DL3015
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y \