diff --git a/test/expected/halfvec_functions.out b/test/expected/halfvec_functions.out
index 02c1bfd..0646dca 100644
--- a/test/expected/halfvec_functions.out
+++ b/test/expected/halfvec_functions.out
@@ -272,6 +272,18 @@ SELECT cosine_distance('[1,1]'::halfvec, '[-1.1,-1.1]');
                2
 (1 row)
 
+SELECT cosine_distance('[1,2,3,4,5,6,7,8,9]'::halfvec, '[1,2,3,4,5,6,7,8,9]');
+ cosine_distance 
+-----------------
+               0
+(1 row)
+
+SELECT cosine_distance('[1,2,3,4,5,6,7,8,9]'::halfvec, '[-1,-2,-3,-4,-5,-6,-7,-8,-9]');
+ cosine_distance 
+-----------------
+               2
+(1 row)
+
 SELECT '[1,2]'::halfvec <=> '[2,4]';
  ?column? 
 ----------
diff --git a/test/sql/halfvec_functions.sql b/test/sql/halfvec_functions.sql
index ce8fc48..fcf1ad4 100644
--- a/test/sql/halfvec_functions.sql
+++ b/test/sql/halfvec_functions.sql
@@ -61,6 +61,8 @@ SELECT cosine_distance('[1,1]'::halfvec, '[-1,-1]');
 SELECT cosine_distance('[1,2]'::halfvec, '[3]');
 SELECT cosine_distance('[1,1]'::halfvec, '[1.1,1.1]');
 SELECT cosine_distance('[1,1]'::halfvec, '[-1.1,-1.1]');
+SELECT cosine_distance('[1,2,3,4,5,6,7,8,9]'::halfvec, '[1,2,3,4,5,6,7,8,9]');
+SELECT cosine_distance('[1,2,3,4,5,6,7,8,9]'::halfvec, '[-1,-2,-3,-4,-5,-6,-7,-8,-9]');
 SELECT '[1,2]'::halfvec <=> '[2,4]';
 
 SELECT l1_distance('[0,0]'::halfvec, '[3,4]');