+# (https://www.mail-archive.com/lyx-devel@lists.lyx.org/msg218237.html)
+# These are old problems. One is related to a questionable nomencl change
+# which we addressed in master but not in stable, see
+# https://www.lyx.org/trac/ticket/10634#comment:2
+# The other is due to CJK quotation marks which are not supported in 2.3.
+#
+# TODO: unignore these tests after they are not used for compilation anymore
+# (we only use "recent" lyx2lyx roundtrip to test compilation.)
+export/doc/de/UserGuide_lyx2(2|3)
+
+# perhaps related to the above de/UserGuide issue:
+# gives the following index error:
+# ERROR: CHAR: index 0 should be less than the length of the string
+# TODO: unignore these tests after they are not used for compilation anymore
+# (we only use "recent" lyx2lyx roundtrip to test compilation.)
+export/doc/fr/EmbeddedObjects_lyx2(2|3)
+
+# (https://www.mail-archive.com/lyx-devel@lists.lyx.org/msg218252.html)
+# from Kornel:
+# Exporting to 2.3 format and exporting from the exported differ in extra lines and
+# in changed sequence of 2 lines at begin.
+#
+# $ diff doc/fr/UserGuide.23.lyx fr/UserGuide.23.23.lyx
+export/doc/fr/UserGuide_lyx2(2|3)
+