diff --git a/docker/opensuse-tumbleweed.docker b/docker/opensuse-tumbleweed.Dockerfile
similarity index 97%
rename from docker/opensuse-tumbleweed.docker
rename to docker/opensuse-tumbleweed.Dockerfile
index 38ab8a5a0..805bb1047 100644
--- a/docker/opensuse-tumbleweed.docker
+++ b/docker/opensuse-tumbleweed.Dockerfile
@@ -6,11 +6,9 @@ ENV LC_ALL=C.UTF-8
 
 RUN zypper --non-interactive install \
   bash \
-  cmake \
   diffutils \
   gcc-c++ \
   git-core \
-  ninja \
   pcre2-devel \
   python311 \
   python311-pip \