diff --git a/tests/prep-qub.lex b/tests/prep-qub.lex
new file mode 100644
index 0000000000000000000000000000000000000000..9392a4546e1a71e594b78de3b33965fa92b37514
--- /dev/null
+++ b/tests/prep-qub.lex
@@ -0,0 +1,15 @@
+bez	prep
+dla	prep
+na	prep
+do	prep
+o	prep
+z	prep
+ze	prep
+już	qub
+nie	qub
+siÄ™	qub
+wcale	qub
+wczoraj	qub
+dziÅ›	qub
+wręcz	qub
+dzisiaj	qub