diff --git a/test/expected/sparsevec_functions.out b/test/expected/sparsevec_functions.out
index 9ec245a..e947cdb 100644
--- a/test/expected/sparsevec_functions.out
+++ b/test/expected/sparsevec_functions.out
@@ -180,6 +180,12 @@ SELECT inner_product('{1:3e38}/1'::sparsevec, '{1:3e38}/1');
       Infinity
 (1 row)
 
+SELECT inner_product('{1:1,3:3,5:5}/5'::sparsevec, '{2:2,3:3,4:4}/5');
+ inner_product 
+---------------
+             9
+(1 row)
+
 SELECT cosine_distance('{1:1,2:2}/2'::sparsevec, '{1:2,2:4}/2');
  cosine_distance 
 -----------------
diff --git a/test/sql/sparsevec_functions.sql b/test/sql/sparsevec_functions.sql
index 95160c5..dda72d1 100644
--- a/test/sql/sparsevec_functions.sql
+++ b/test/sql/sparsevec_functions.sql
@@ -33,6 +33,7 @@ SELECT '{}/2'::sparsevec <-> '{1:3,2:4}/2';
 SELECT inner_product('{1:1,2:2}/2'::sparsevec, '{1:2,2:4}/2');
 SELECT inner_product('{1:1,2:2}/2'::sparsevec, '{1:3}/1');
 SELECT inner_product('{1:3e38}/1'::sparsevec, '{1:3e38}/1');
+SELECT inner_product('{1:1,3:3,5:5}/5'::sparsevec, '{2:2,3:3,4:4}/5');
 
 SELECT cosine_distance('{1:1,2:2}/2'::sparsevec, '{1:2,2:4}/2');
 SELECT cosine_distance('{1:1,2:2}/2'::sparsevec, '{}/2');