diff --git a/scripts/build-unit-test-docker b/scripts/build-unit-test-docker
index 9b0cc34..93506e9 100755
--- a/scripts/build-unit-test-docker
+++ b/scripts/build-unit-test-docker
@@ -632,7 +632,7 @@
 )
 force_build = os.environ.get("FORCE_DOCKER_BUILD")
 is_automated_ci_build = os.environ.get("BUILD_URL", False)
-distro = os.environ.get("DISTRO", "ubuntu:lunar")
+distro = os.environ.get("DISTRO", "ubuntu:mantic")
 branch = os.environ.get("BRANCH", "master")
 ubuntu_mirror = os.environ.get("UBUNTU_MIRROR")
 http_proxy = os.environ.get("http_proxy")