diff --git a/test/expected/functions.out b/test/expected/functions.out
index 265a84d..dd28597 100644
--- a/test/expected/functions.out
+++ b/test/expected/functions.out
@@ -240,6 +240,12 @@ SELECT quantize_binary('[1,0,-1]');
  100
 (1 row)
 
+SELECT quantize_binary('[0.1,-0.2,-0.3,0.4,0.5,0.6,-0.7,0.8,-0.9,-1]');
+ quantize_binary 
+-----------------
+ 1001110100
+(1 row)
+
 SELECT avg(v) FROM unnest(ARRAY['[1,2,3]'::vector, '[3,5,7]']) v;
     avg    
 -----------
diff --git a/test/sql/functions.sql b/test/sql/functions.sql
index 42c706e..e82fda6 100644
--- a/test/sql/functions.sql
+++ b/test/sql/functions.sql
@@ -55,6 +55,7 @@ SELECT hamming_distance(B'111', B'000');
 SELECT hamming_distance(B'111', B'00');
 
 SELECT quantize_binary('[1,0,-1]');
+SELECT quantize_binary('[0.1,-0.2,-0.3,0.4,0.5,0.6,-0.7,0.8,-0.9,-1]');
 
 SELECT avg(v) FROM unnest(ARRAY['[1,2,3]'::vector, '[3,5,7]']) v;
 SELECT avg(v) FROM unnest(ARRAY['[1,2,3]'::vector, '[3,5,7]', NULL]) v;