diff --git a/tests/ci/Dockerfile-debian b/tests/ci/Dockerfile-debian
index badf8573a..bacd120e2 100644
--- a/tests/ci/Dockerfile-debian
+++ b/tests/ci/Dockerfile-debian
@@ -1,4 +1,4 @@
-FROM debian:bookworm
+FROM debian:testing
 
 # allow fetching source packages
 RUN echo "deb-src http://deb.debian.org/debian/ bookworm main" >> /etc/apt/sources.list