Some exports to versions < 2.1 fail due to a warning about missing layout name.
#
check_load/templates/acmart
+# "beamer" lyx2lyx fails sometimes for versions < 2.1
+# Back-conversion results in some layouts without name ("\begin_layout \n")
+# which trigger a warning message leading to test failure.
+export/examples/(|de/|fr/|ja/)beamer_lyx(16|20)
+export/templates/.*beamer-conference-ornate-20min_lyx(16|20)
+export/examples/beamerlyxexample1_lyx(16|20)
+
# input encoding tests
# --------------------