diff --git a/test/expected/cast.out b/test/expected/cast.out
index 80541fe..9231677 100644
--- a/test/expected/cast.out
+++ b/test/expected/cast.out
@@ -52,16 +52,14 @@ SELECT '[1,2,3]'::vector::halfvec;
  [1,2,3]
 (1 row)
 
-SELECT '[1,2,3]'::halfvec::vector;
- vector  
+SELECT '[1,2,3]'::vector::halfvec(3);
+ halfvec 
 ---------
  [1,2,3]
 (1 row)
 
 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;
@@ -70,20 +68,50 @@ SELECT '[1e-8]'::vector::halfvec;
  [0]
 (1 row)
 
+SELECT '[1,2,3]'::halfvec::vector;
+ vector  
+---------
+ [1,2,3]
+(1 row)
+
+SELECT '[1,2,3]'::halfvec::vector(3);
+ vector  
+---------
+ [1,2,3]
+(1 row)
+
+SELECT '[1,2,3]'::halfvec::vector(2);
+ERROR:  expected 2 dimensions, not 3
 SELECT '{2:1.5,4:3.5}/5'::sparsevec::vector;
      vector      
 -----------------
  [0,1.5,0,3.5,0]
 (1 row)
 
+SELECT '{1:1.5,3:3.5}/5'::sparsevec::vector(5);
+     vector      
+-----------------
+ [1.5,0,3.5,0,0]
+(1 row)
+
+SELECT '{1:1.5,3:3.5}/5'::sparsevec::vector(4);
+ERROR:  expected 4 dimensions, not 5
+SELECT '{}/16001'::sparsevec::vector;
+ERROR:  vector cannot have more than 16000 dimensions
 SELECT '[0,1.5,0,3.5,0]'::vector::sparsevec;
     sparsevec    
 -----------------
  {2:1.5,4:3.5}/5
 (1 row)
 
-SELECT '{}/16001'::sparsevec::vector;
-ERROR:  vector cannot have more than 16000 dimensions
+SELECT '[0,1.5,0,3.5,0]'::vector::sparsevec(5);
+    sparsevec    
+-----------------
+ {2:1.5,4:3.5}/5
+(1 row)
+
+SELECT '[0,1.5,0,3.5,0]'::vector::sparsevec(4);
+ERROR:  expected 4 dimensions, not 5
 SELECT array_agg(n)::vector FROM generate_series(1, 16001) n;
 ERROR:  vector cannot have more than 16000 dimensions
 SELECT array_to_vector(array_agg(n), 16001, false) FROM generate_series(1, 16001) n;
diff --git a/test/expected/sparsevec_input.out b/test/expected/sparsevec_input.out
index d5e48b2..f1e4f8d 100644
--- a/test/expected/sparsevec_input.out
+++ b/test/expected/sparsevec_input.out
@@ -88,11 +88,3 @@ LINE 1: SELECT '{2:1}/1'::sparsevec;
                ^
 SELECT '{}/1'::sparsevec(2);
 ERROR:  expected 2 dimensions, not 1
-SELECT '{1:1.5,3:3.5}/5'::sparsevec::vector(5);
-     vector      
------------------
- [1.5,0,3.5,0,0]
-(1 row)
-
-SELECT '{1:1.5,3:3.5}/5'::sparsevec::vector(4);
-ERROR:  expected 4 dimensions, not 5
diff --git a/test/sql/cast.sql b/test/sql/cast.sql
index 40c9b08..4fccafb 100644
--- a/test/sql/cast.sql
+++ b/test/sql/cast.sql
@@ -12,16 +12,24 @@ SELECT '{{1}}'::real[]::vector;
 SELECT '[1,2,3]'::vector::real[];
 
 SELECT '[1,2,3]'::vector::halfvec;
-SELECT '[1,2,3]'::halfvec::vector;
+SELECT '[1,2,3]'::vector::halfvec(3);
 SELECT '[1,2,3]'::vector::halfvec(2);
-SELECT '[1,2,3]'::halfvec::vector(2);
 SELECT '[65520]'::vector::halfvec;
 SELECT '[1e-8]'::vector::halfvec;
 
+SELECT '[1,2,3]'::halfvec::vector;
+SELECT '[1,2,3]'::halfvec::vector(3);
+SELECT '[1,2,3]'::halfvec::vector(2);
+
 SELECT '{2:1.5,4:3.5}/5'::sparsevec::vector;
-SELECT '[0,1.5,0,3.5,0]'::vector::sparsevec;
+SELECT '{1:1.5,3:3.5}/5'::sparsevec::vector(5);
+SELECT '{1:1.5,3:3.5}/5'::sparsevec::vector(4);
 SELECT '{}/16001'::sparsevec::vector;
 
+SELECT '[0,1.5,0,3.5,0]'::vector::sparsevec;
+SELECT '[0,1.5,0,3.5,0]'::vector::sparsevec(5);
+SELECT '[0,1.5,0,3.5,0]'::vector::sparsevec(4);
+
 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;
 
diff --git a/test/sql/sparsevec_input.sql b/test/sql/sparsevec_input.sql
index 7757dd3..e188d9a 100644
--- a/test/sql/sparsevec_input.sql
+++ b/test/sql/sparsevec_input.sql
@@ -24,5 +24,3 @@ SELECT '{0:1}/1'::sparsevec;
 SELECT '{2:1}/1'::sparsevec;
 
 SELECT '{}/1'::sparsevec(2);
-SELECT '{1:1.5,3:3.5}/5'::sparsevec::vector(5);
-SELECT '{1:1.5,3:3.5}/5'::sparsevec::vector(4);