diff --git a/test/expected/cast.out b/test/expected/cast.out
index 5874714..a5772d4 100644
--- a/test/expected/cast.out
+++ b/test/expected/cast.out
@@ -62,6 +62,8 @@ SELECT '[1,2,3]'::vector::halfvec(2);
 ERROR:  expected 2 dimensions, not 3
 SELECT '[1,2,3]'::halfvec::vector(2);
 ERROR:  expected 2 dimensions, not 3
+SELECT '[65520]'::vector::halfvec;
+ERROR:  infinite value not allowed in halfvec
 SELECT '[1e-8]'::vector::halfvec;
  halfvec 
 ---------
diff --git a/test/sql/cast.sql b/test/sql/cast.sql
index b85dadd..2a43671 100644
--- a/test/sql/cast.sql
+++ b/test/sql/cast.sql
@@ -14,6 +14,7 @@ SELECT '[1,2,3]'::vector::halfvec;
 SELECT '[1,2,3]'::halfvec::vector;
 SELECT '[1,2,3]'::vector::halfvec(2);
 SELECT '[1,2,3]'::halfvec::vector(2);
+SELECT '[65520]'::vector::halfvec;
 SELECT '[1e-8]'::vector::halfvec;
 SELECT array_agg(n)::vector FROM generate_series(1, 16001) n;
 SELECT array_to_vector(array_agg(n), 16001, false) FROM generate_series(1, 16001) n;