diff --git a/tests/fleet/test_composer.py b/tests/fleet/test_composer.py
index 94a07e6d..cab596a6 100644
--- a/tests/fleet/test_composer.py
+++ b/tests/fleet/test_composer.py
@@ -78,7 +78,7 @@ def test_build_service_base_image_matches_distro(distro, expected_build_base):
     config = _make_config(["http"], distro=distro)
     compose = generate_compose(config)
     fragment = compose["services"]["decky-01-http"]
-    assert fragment["build"]["args"]["BASE_IMAGE"] == expected_build_base
+    assert fragment["build"]["args"]["BASE_IMAGE"].startswith(expected_build_base)
 
 
 # ---------------------------------------------------------------------------