diff --git a/test/expected/bit_functions.out b/test/expected/bit_functions.out
index 3647fa2..9b5bd7d 100644
--- a/test/expected/bit_functions.out
+++ b/test/expected/bit_functions.out
@@ -24,6 +24,12 @@ SELECT hamming_distance(B'111', B'000');
 
 SELECT hamming_distance(B'111', B'00');
 ERROR:  different bit lengths 3 and 2
+SELECT hamming_distance(B'111', B'000'::varbit(4));
+ hamming_distance 
+------------------
+                3
+(1 row)
+
 SELECT jaccard_distance(B'1111', B'1111');
  jaccard_distance 
 ------------------
@@ -62,3 +68,9 @@ SELECT jaccard_distance(B'1100', B'1000');
 
 SELECT jaccard_distance(B'1111', B'000');
 ERROR:  different bit lengths 4 and 3
+SELECT jaccard_distance(B'1111', B'0000'::varbit(5));
+ jaccard_distance 
+------------------
+                1
+(1 row)
+
diff --git a/test/sql/bit_functions.sql b/test/sql/bit_functions.sql
index 2248338..8bad1ce 100644
--- a/test/sql/bit_functions.sql
+++ b/test/sql/bit_functions.sql
@@ -3,6 +3,7 @@ SELECT hamming_distance(B'111', B'110');
 SELECT hamming_distance(B'111', B'100');
 SELECT hamming_distance(B'111', B'000');
 SELECT hamming_distance(B'111', B'00');
+SELECT hamming_distance(B'111', B'000'::varbit(4));
 
 SELECT jaccard_distance(B'1111', B'1111');
 SELECT jaccard_distance(B'1111', B'1110');
@@ -11,3 +12,4 @@ SELECT jaccard_distance(B'1111', B'1000');
 SELECT jaccard_distance(B'1111', B'0000');
 SELECT jaccard_distance(B'1100', B'1000');
 SELECT jaccard_distance(B'1111', B'000');
+SELECT jaccard_distance(B'1111', B'0000'::varbit(5));