prohibit encoding universalstring of non-modulo-multiplier size
diff --git a/tests/tests-skeletons/Makefile.am b/tests/tests-skeletons/Makefile.am
index 2562443..ce74b65 100644
--- a/tests/tests-skeletons/Makefile.am
+++ b/tests/tests-skeletons/Makefile.am
@@ -13,6 +13,7 @@
     check-XER               \
     check-OER-INTEGER       \
     check-OER-NativeEnumerated \
+    check-PER-UniversalString  \
     check-PER               \
     check-PER-INTEGER