diff --git a/tests/tests-asn1c-compiler/23-bits-OK.asn1.-EF b/tests/tests-asn1c-compiler/23-bits-OK.asn1.-EF
index 8064815..d02605b 100644
--- a/tests/tests-asn1c-compiler/23-bits-OK.asn1.-EF
+++ b/tests/tests-asn1c-compiler/23-bits-OK.asn1.-EF
@@ -15,4 +15,6 @@
 
 one0one BS1 ::= '101'B
 
+empty BS1 ::= ''H
+
 END