diff --git a/testbuilds.py b/testbuilds.py
index 77effdd0..66cb59fa 100755
--- a/testbuilds.py
+++ b/testbuilds.py
@@ -682,6 +682,53 @@ def test_224_ubuntu22_cmake_build_dockerfile(self) -> None:
         cmd = "{docker} rmi {images}:{testname}"
         sx____(cmd.format(**locals()))
         self.rm_testdir()
+    @unittest.expectedFailure
+    def test_225_ubuntu24_cmake_build_dockerfile(self) -> None:
+        # no universe yet (in February 2024)
+        if not os.path.exists(DOCKER_SOCKET): self.skipTest("docker-based test")
+        self.rm_old()
+        self.rm_testdir()
+        testname = self.testname()
+        testdir = self.testdir()
+        docker = DOCKER
+        dockerfile = "testbuilds/ubuntu24-cm-build.dockerfile"
+        addhosts = self.local_addhosts(dockerfile)
+        savename = docname(dockerfile)
+        saveto = SAVETO
+        images = IMAGES
+        build = "build --build-arg=no_check=true" + self.nocache()
+        cmd = "{docker} {build} . -f {dockerfile} {addhosts} --tag {images}:{testname}"
+        sh____(cmd.format(**locals()))
+        cmd = "{docker} rm --force {testname}"
+        sx____(cmd.format(**locals()))
+        cmd = "{docker} run -d --name {testname} {images}:{testname} sleep 600"
+        sh____(cmd.format(**locals()))
+        #:# container = self.ip_container(testname)
+        cmd = "{docker} exec {testname} ls -l /usr/local/bin"
+        sh____(cmd.format(**locals()))
+        cmd = "{docker} exec {testname} find /usr/local/include -type f"
+        sh____(cmd.format(**locals()))
+        cmd = "{docker} exec {testname} bash -c 'ls -l /usr/local/lib/libzz*'"
+        sh____(cmd.format(**locals()))
+        #
+        cmd = "{docker} exec {testname} bash -c 'test ! -d /usr/local/include/SDL_rwops_zzip'"
+        sh____(cmd.format(**locals()))
+        cmd = "{docker} exec {testname} dpkg -S /usr/lib/x86_64-linux-gnu/pkgconfig/zlib.pc"
+        sh____(cmd.format(**locals()))
+        cmd = "{docker} exec {testname} pkg-config --libs zlib"
+        zlib = output(cmd.format(**locals()))
+        self.assertEqual(zlib.strip(), "-lz")
+        #
+        if not KEEP:
+            cmd = "{docker} rm --force {testname}"
+            sx____(cmd.format(**locals()))
+        cmd = "{docker} rmi {saveto}/{savename}:latest"
+        sx____(cmd.format(**locals()))
+        cmd = "{docker} tag {images}:{testname} {saveto}/{savename}:latest"
+        sh____(cmd.format(**locals()))
+        cmd = "{docker} rmi {images}:{testname}"
+        sx____(cmd.format(**locals()))
+        self.rm_testdir()
     def test_228_ubuntu16_32bit_dockerfile(self) -> None:
         if not os.path.exists(DOCKER_SOCKET): self.skipTest("docker-based test")
         self.rm_old()
@@ -1086,7 +1133,7 @@ def test_323_ubuntu20_cmake_sdl2_dockerfile(self) -> None:
         cmd = "{docker} rmi {images}:{testname}"
         sx____(cmd.format(**locals()))
         self.rm_testdir()
-    def test_324_ubuntu23_cmake_sdl2_dockerfile(self) -> None:
+    def test_324_ubuntu22_cmake_sdl2_dockerfile(self) -> None:
         if not os.path.exists(DOCKER_SOCKET): self.skipTest("docker-based test")
         self.rm_old()
         self.rm_testdir()
@@ -1126,6 +1173,46 @@ def test_324_ubuntu23_cmake_sdl2_dockerfile(self) -> None:
         cmd = "{docker} rmi {images}:{testname}"
         sx____(cmd.format(**locals()))
         self.rm_testdir()
+    def test_325_ubuntu24_cmake_sdl2_dockerfile(self) -> None:
+        if not os.path.exists(DOCKER_SOCKET): self.skipTest("docker-based test")
+        self.rm_old()
+        self.rm_testdir()
+        testname = self.testname()
+        testdir = self.testdir()
+        docker = DOCKER
+        dockerfile = "testbuilds/ubuntu24-cm-sdl2.dockerfile"
+        addhosts = self.local_addhosts(dockerfile, "--universe")
+        savename = docname(dockerfile)
+        saveto = SAVETO
+        images = IMAGES
+        build = "build --build-arg=no_check=true" + self.nocache()
+        cmd = "{docker} {build} . -f {dockerfile} {addhosts} --tag {images}:{testname}"
+        sh____(cmd.format(**locals()))
+        cmd = "{docker} rm --force {testname}"
+        sx____(cmd.format(**locals()))
+        cmd = "{docker} run -d --name {testname} {images}:{testname} sleep 600"
+        sh____(cmd.format(**locals()))
+        #:# container = self.ip_container(testname)
+        cmd = "{docker} exec {testname} ls -l /usr/local/bin"
+        sh____(cmd.format(**locals()))
+        cmd = "{docker} exec {testname} find /usr/local/include -type f"
+        sh____(cmd.format(**locals()))
+        cmd = "{docker} exec {testname} bash -c 'ls -l /usr/local/lib/libzz*'"
+        sh____(cmd.format(**locals()))
+        #
+        cmd = "{docker} exec {testname} bash -c 'test -d /usr/local/include/SDL_rwops_zzip'"
+        sh____(cmd.format(**locals()))
+        #
+        if not KEEP:
+            cmd = "{docker} rm --force {testname}"
+            sx____(cmd.format(**locals()))
+        cmd = "{docker} rmi {saveto}/{savename}:latest"
+        sx____(cmd.format(**locals()))
+        cmd = "{docker} tag {images}:{testname} {saveto}/{savename}:latest"
+        sh____(cmd.format(**locals()))
+        cmd = "{docker} rmi {images}:{testname}"
+        sx____(cmd.format(**locals()))
+        self.rm_testdir()
     def test_335_opensuse15_cmake_sdl2_dockerfile(self) -> None:
         if not os.path.exists(DOCKER_SOCKET): self.skipTest("docker-based test")
         self.rm_old()
diff --git a/testbuilds/ubuntu24-cm-build.dockerfile b/testbuilds/ubuntu24-cm-build.dockerfile
new file mode 100644
index 00000000..0e03fd48
--- /dev/null
+++ b/testbuilds/ubuntu24-cm-build.dockerfile
@@ -0,0 +1,24 @@
+FROM ubuntu:24.04
+ARG no_check=false
+ARG no_install=false
+
+RUN apt-get update
+RUN DEBIAN_FRONTEND=noninteractive TZ=Etc/UTC apt-get -y install tzdata
+RUN apt-get install -y gcc zlib1g-dev python3 cmake unzip zip gzip tar pkg-config
+
+RUN mkdir src
+COPY CMakeLists.txt README COPYING.LIB ChangeLog src/
+COPY CMakeScripts src/CMakeScripts
+COPY bins src/bins
+COPY docs src/docs
+COPY test src/test
+COPY SDL src/SDL
+COPY zzipwrap src/zzipwrap
+COPY zzip src/zzip
+
+RUN mkdir src/build
+RUN cd src/build && cmake ..
+RUN cd src/build && make
+RUN $no_check || (cd src/build && make check)
+RUN $no_install || (cd src/build && make install)
+
diff --git a/testbuilds/ubuntu24-cm-sdl2.dockerfile b/testbuilds/ubuntu24-cm-sdl2.dockerfile
new file mode 100644
index 00000000..13710ad0
--- /dev/null
+++ b/testbuilds/ubuntu24-cm-sdl2.dockerfile
@@ -0,0 +1,25 @@
+FROM ubuntu:24.04
+ARG no_check=false
+ARG no_install=false
+
+RUN apt-get update
+RUN DEBIAN_FRONTEND=noninteractive TZ=Etc/UTC apt-get -y install tzdata
+RUN apt-get install -y gcc zlib1g-dev python3 cmake unzip zip gzip tar pkg-config  libsdl2-dev
+## libsdl2-dev is on "universe"
+
+RUN mkdir src
+COPY CMakeLists.txt README COPYING.LIB ChangeLog src/
+COPY CMakeScripts src/CMakeScripts
+COPY bins src/bins
+COPY docs src/docs
+COPY test src/test
+COPY SDL src/SDL
+COPY zzipwrap src/zzipwrap
+COPY zzip src/zzip
+
+RUN mkdir src/build
+RUN cd src/build && cmake ..
+RUN cd src/build && make
+RUN $no_check || (cd src/build && make check)
+RUN $no_install || (cd src/build && make install)
+