diff --git a/development/autotests/invertedTests b/development/autotests/invertedTests
index 225f766a0e..c2a246a570 100644
--- a/development/autotests/invertedTests
+++ b/development/autotests/invertedTests
@@ -116,14 +116,13 @@ export/export/latex/unicodesymbols/070-72-general-punctuation-sub-super-currency
 export/export/latex/unicodesymbols/074-76-letterlike-numberforms-arrows_cp1256_pdf2
 
 # CJK legacy encodings
-#export/export/latex/unicodesymbols/.*_euc-cn_pdf2 # fixed :-)
+#export/export/latex/unicodesymbols/.*_euc-cn_pdf2
 # compilation of the next ones is also fixed, but correct output not verified:
 # (except for Greek, due to a missing "force" flag
-export/export/latex/unicodesymbols/.*_gbk_pdf2
-export/export/latex/unicodesymbols/.*_jis_pdf2 # some still failing
-export/export/latex/unicodesymbols/.*_euc-kr_pdf2
-export/export/latex/unicodesymbols/.*_euc-tw_pdf2
+#export/export/latex/unicodesymbols/.*_jis_pdf2
+#export/export/latex/unicodesymbols/.*_euc-kr_pdf2
 export/export/latex/unicodesymbols/.*_euc-jp_pdf2
+export/export/latex/unicodesymbols/.*_euc-tw_pdf2
 
 # pLaTeX
 export/export/latex/unicodesymbols/.*_euc-jp-platex_pdf2
@@ -168,6 +167,11 @@ Sublabel: lyxbugs
 # LyX bugs with a Trac number.
 # ================================================
 
+#6197: „amssymb” with Polish babel name clash \lll ("<<<" vs. "ł")
+# Wrong output with pdflatex (-> unreliableTests),
+# missing character with XeTeX/LuaTeX and Babel (OK with Polyglossia)
+export/export/latex/6197-polish-amssymb_pdf._texF
+
 #6463 font encoding changes and combining accents
 # problem remains for Cyrillic in a non-Cyrillic-using language
 export/export/latex/cyrillic-accent-ascii_pdf2
diff --git a/development/autotests/unreliableTests b/development/autotests/unreliableTests
index 9e5cf7d873..219e8f7746 100644
--- a/development/autotests/unreliableTests
+++ b/development/autotests/unreliableTests
@@ -91,6 +91,11 @@ export/examples/(|fr/)seminar_(dvi|pdf).*
 export/examples/es/(ejemplo_con_lyx|tufte_book)_(pdf5|dvi3)_texF
 export/doc/es/.*_(pdf5|dvi3)_texF
 
+#6197: „amssymb” with Polish babel: name clash \lll ("<<<" vs. "ł")
+# Wrong output with pdflatex 
+# missing character with XeTeX/LuaTeX and Babel (-> invertedTests)
+export/export/latex/6197-polish-amssymb_(dvi|pdf).?
+
 # Non-ASCII char in verbatim environment is dropped (with a warning when
 # doing this interactively) with ASCII (and hence also with XeTeX).
 export/doc/(|de/|es/|fr/)EmbeddedObjects_pdf4_texF