diff --git a/contrib/btree_gin/expected/install_btree_gin.out b/contrib/btree_gin/expected/install_btree_gin.out
index 0fae4c5bfe..631a0df722 100644
--- a/contrib/btree_gin/expected/install_btree_gin.out
+++ b/contrib/btree_gin/expected/install_btree_gin.out
@@ -1 +1,9 @@
 CREATE EXTENSION btree_gin;
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+ amname | opcname 
+--------+---------
+(0 rows)
+
diff --git a/contrib/btree_gin/sql/install_btree_gin.sql b/contrib/btree_gin/sql/install_btree_gin.sql
index 0fae4c5bfe..746e77654f 100644
--- a/contrib/btree_gin/sql/install_btree_gin.sql
+++ b/contrib/btree_gin/sql/install_btree_gin.sql
@@ -1 +1,6 @@
 CREATE EXTENSION btree_gin;
+
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
diff --git a/contrib/btree_gist/expected/init.out b/contrib/btree_gist/expected/init.out
index afe0534682..ce4559d8b0 100644
--- a/contrib/btree_gist/expected/init.out
+++ b/contrib/btree_gist/expected/init.out
@@ -1 +1,9 @@
 CREATE EXTENSION btree_gist;
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+ amname | opcname 
+--------+---------
+(0 rows)
+
diff --git a/contrib/btree_gist/sql/init.sql b/contrib/btree_gist/sql/init.sql
index afe0534682..a6d2cffc67 100644
--- a/contrib/btree_gist/sql/init.sql
+++ b/contrib/btree_gist/sql/init.sql
@@ -1 +1,6 @@
 CREATE EXTENSION btree_gist;
+
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
diff --git a/contrib/citext/expected/citext.out b/contrib/citext/expected/citext.out
index 1a1e6c82f7..bc5d92eb91 100644
--- a/contrib/citext/expected/citext.out
+++ b/contrib/citext/expected/citext.out
@@ -2,6 +2,14 @@
 --  Test citext datatype
 --
 CREATE EXTENSION citext;
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+ amname | opcname 
+--------+---------
+(0 rows)
+
 -- Test the operators and indexing functions
 -- Test = and <>.
 SELECT 'a'::citext = 'a'::citext AS t;
diff --git a/contrib/citext/expected/citext_1.out b/contrib/citext/expected/citext_1.out
index 3331dbc255..3d02d06b9c 100644
--- a/contrib/citext/expected/citext_1.out
+++ b/contrib/citext/expected/citext_1.out
@@ -2,6 +2,14 @@
 --  Test citext datatype
 --
 CREATE EXTENSION citext;
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+ amname | opcname 
+--------+---------
+(0 rows)
+
 -- Test the operators and indexing functions
 -- Test = and <>.
 SELECT 'a'::citext = 'a'::citext AS t;
diff --git a/contrib/citext/sql/citext.sql b/contrib/citext/sql/citext.sql
index a802484663..f70f9ebae9 100644
--- a/contrib/citext/sql/citext.sql
+++ b/contrib/citext/sql/citext.sql
@@ -4,6 +4,11 @@
 
 CREATE EXTENSION citext;
 
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+
 -- Test the operators and indexing functions
 
 -- Test = and <>.
diff --git a/contrib/cube/expected/cube.out b/contrib/cube/expected/cube.out
index 095491fa0c..ada54b2885 100644
--- a/contrib/cube/expected/cube.out
+++ b/contrib/cube/expected/cube.out
@@ -2,6 +2,14 @@
 --  Test cube datatype
 --
 CREATE EXTENSION cube;
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+ amname | opcname 
+--------+---------
+(0 rows)
+
 --
 -- testing the input and output functions
 --
diff --git a/contrib/cube/expected/cube_2.out b/contrib/cube/expected/cube_2.out
index eaeae45fca..c58614ef05 100644
--- a/contrib/cube/expected/cube_2.out
+++ b/contrib/cube/expected/cube_2.out
@@ -2,6 +2,14 @@
 --  Test cube datatype
 --
 CREATE EXTENSION cube;
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+ amname | opcname 
+--------+---------
+(0 rows)
+
 --
 -- testing the input and output functions
 --
diff --git a/contrib/cube/sql/cube.sql b/contrib/cube/sql/cube.sql
index cc5a1ce458..a61fba1ea8 100644
--- a/contrib/cube/sql/cube.sql
+++ b/contrib/cube/sql/cube.sql
@@ -4,6 +4,11 @@
 
 CREATE EXTENSION cube;
 
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+
 --
 -- testing the input and output functions
 --
diff --git a/contrib/hstore/expected/hstore.out b/contrib/hstore/expected/hstore.out
index 6773a2b72f..f0d421602d 100644
--- a/contrib/hstore/expected/hstore.out
+++ b/contrib/hstore/expected/hstore.out
@@ -1,4 +1,12 @@
 CREATE EXTENSION hstore;
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+ amname | opcname 
+--------+---------
+(0 rows)
+
 set escape_string_warning=off;
 --hstore;
 select ''::hstore;
diff --git a/contrib/hstore/sql/hstore.sql b/contrib/hstore/sql/hstore.sql
index 48514789e6..d64b9f77c7 100644
--- a/contrib/hstore/sql/hstore.sql
+++ b/contrib/hstore/sql/hstore.sql
@@ -1,5 +1,10 @@
 CREATE EXTENSION hstore;
 
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+
 set escape_string_warning=off;
 
 --hstore;
diff --git a/contrib/intarray/expected/_int.out b/contrib/intarray/expected/_int.out
index 962e5c6a4b..0a5dd463ac 100644
--- a/contrib/intarray/expected/_int.out
+++ b/contrib/intarray/expected/_int.out
@@ -1,4 +1,12 @@
 CREATE EXTENSION intarray;
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+ amname | opcname 
+--------+---------
+(0 rows)
+
 SELECT intset(1234);
  intset 
 --------
diff --git a/contrib/intarray/sql/_int.sql b/contrib/intarray/sql/_int.sql
index f6fe2de55c..44e1a729b4 100644
--- a/contrib/intarray/sql/_int.sql
+++ b/contrib/intarray/sql/_int.sql
@@ -1,5 +1,10 @@
 CREATE EXTENSION intarray;
 
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+
 SELECT intset(1234);
 SELECT icount('{1234234,234234}');
 SELECT sort('{1234234,-30,234234}');
diff --git a/contrib/isn/expected/isn.out b/contrib/isn/expected/isn.out
index 140bc86656..ef9d3a61e7 100644
--- a/contrib/isn/expected/isn.out
+++ b/contrib/isn/expected/isn.out
@@ -2,6 +2,50 @@
 -- Test ISN extension
 --
 CREATE EXTENSION isn;
+-- Check whether any of our opclasses fail amvalidate
+-- ... they will, because of missing cross-type operators
+SELECT amname, opcname
+FROM (SELECT amname, opcname, opc.oid
+      FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+      WHERE opc.oid >= 16384
+      ORDER BY 1, 2 OFFSET 0) ss
+WHERE NOT amvalidate(oid);
+INFO:  btree operator family "isn_ops" is missing cross-type operator(s)
+INFO:  btree operator family "isn_ops" is missing cross-type operator(s)
+INFO:  btree operator family "isn_ops" is missing cross-type operator(s)
+INFO:  btree operator family "isn_ops" is missing cross-type operator(s)
+INFO:  btree operator family "isn_ops" is missing cross-type operator(s)
+INFO:  btree operator family "isn_ops" is missing cross-type operator(s)
+INFO:  btree operator family "isn_ops" is missing cross-type operator(s)
+INFO:  btree operator family "isn_ops" is missing cross-type operator(s)
+INFO:  hash operator family "isn_ops" is missing cross-type operator(s)
+INFO:  hash operator family "isn_ops" is missing cross-type operator(s)
+INFO:  hash operator family "isn_ops" is missing cross-type operator(s)
+INFO:  hash operator family "isn_ops" is missing cross-type operator(s)
+INFO:  hash operator family "isn_ops" is missing cross-type operator(s)
+INFO:  hash operator family "isn_ops" is missing cross-type operator(s)
+INFO:  hash operator family "isn_ops" is missing cross-type operator(s)
+INFO:  hash operator family "isn_ops" is missing cross-type operator(s)
+ amname |  opcname   
+--------+------------
+ btree  | ean13_ops
+ btree  | isbn13_ops
+ btree  | isbn_ops
+ btree  | ismn13_ops
+ btree  | ismn_ops
+ btree  | issn13_ops
+ btree  | issn_ops
+ btree  | upc_ops
+ hash   | ean13_ops
+ hash   | isbn13_ops
+ hash   | isbn_ops
+ hash   | ismn13_ops
+ hash   | ismn_ops
+ hash   | issn13_ops
+ hash   | issn_ops
+ hash   | upc_ops
+(16 rows)
+
 --
 -- test valid conversions
 --
diff --git a/contrib/isn/sql/isn.sql b/contrib/isn/sql/isn.sql
index 5ef6d8aa3b..71577d5590 100644
--- a/contrib/isn/sql/isn.sql
+++ b/contrib/isn/sql/isn.sql
@@ -4,6 +4,15 @@
 
 CREATE EXTENSION isn;
 
+-- Check whether any of our opclasses fail amvalidate
+-- ... they will, because of missing cross-type operators
+SELECT amname, opcname
+FROM (SELECT amname, opcname, opc.oid
+      FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+      WHERE opc.oid >= 16384
+      ORDER BY 1, 2 OFFSET 0) ss
+WHERE NOT amvalidate(oid);
+
 --
 -- test valid conversions
 --
diff --git a/contrib/ltree/expected/ltree.out b/contrib/ltree/expected/ltree.out
index da6e39a785..db52069c26 100644
--- a/contrib/ltree/expected/ltree.out
+++ b/contrib/ltree/expected/ltree.out
@@ -1,4 +1,12 @@
 CREATE EXTENSION ltree;
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+ amname | opcname 
+--------+---------
+(0 rows)
+
 SELECT ''::ltree;
  ltree 
 -------
diff --git a/contrib/ltree/sql/ltree.sql b/contrib/ltree/sql/ltree.sql
index 46cfa41a41..b4f62e3feb 100644
--- a/contrib/ltree/sql/ltree.sql
+++ b/contrib/ltree/sql/ltree.sql
@@ -1,5 +1,10 @@
 CREATE EXTENSION ltree;
 
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+
 SELECT ''::ltree;
 SELECT '1'::ltree;
 SELECT '1.2'::ltree;
diff --git a/contrib/pg_trgm/expected/pg_trgm.out b/contrib/pg_trgm/expected/pg_trgm.out
index 9bc55f1d0d..f646cbf90a 100644
--- a/contrib/pg_trgm/expected/pg_trgm.out
+++ b/contrib/pg_trgm/expected/pg_trgm.out
@@ -1,4 +1,12 @@
 CREATE EXTENSION pg_trgm;
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+ amname | opcname 
+--------+---------
+(0 rows)
+
 select show_trgm('');
  show_trgm 
 -----------
diff --git a/contrib/pg_trgm/sql/pg_trgm.sql b/contrib/pg_trgm/sql/pg_trgm.sql
index 244946bb8d..34d0614edb 100644
--- a/contrib/pg_trgm/sql/pg_trgm.sql
+++ b/contrib/pg_trgm/sql/pg_trgm.sql
@@ -1,5 +1,10 @@
 CREATE EXTENSION pg_trgm;
 
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+
 select show_trgm('');
 select show_trgm('(*&^$@%@');
 select show_trgm('a b c');
diff --git a/contrib/seg/expected/seg.out b/contrib/seg/expected/seg.out
index 1f82a4abb8..18010c4d5c 100644
--- a/contrib/seg/expected/seg.out
+++ b/contrib/seg/expected/seg.out
@@ -2,6 +2,14 @@
 --  Test seg datatype
 --
 CREATE EXTENSION seg;
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+ amname | opcname 
+--------+---------
+(0 rows)
+
 --
 -- testing the input and output functions
 --
diff --git a/contrib/seg/expected/seg_1.out b/contrib/seg/expected/seg_1.out
index 563c744b2d..566ce394ed 100644
--- a/contrib/seg/expected/seg_1.out
+++ b/contrib/seg/expected/seg_1.out
@@ -2,6 +2,14 @@
 --  Test seg datatype
 --
 CREATE EXTENSION seg;
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+ amname | opcname 
+--------+---------
+(0 rows)
+
 --
 -- testing the input and output functions
 --
diff --git a/contrib/seg/sql/seg.sql b/contrib/seg/sql/seg.sql
index 7b7f138dbf..aa91931474 100644
--- a/contrib/seg/sql/seg.sql
+++ b/contrib/seg/sql/seg.sql
@@ -4,6 +4,11 @@
 
 CREATE EXTENSION seg;
 
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+
 --
 -- testing the input and output functions
 --
diff --git a/contrib/tsearch2/expected/tsearch2.out b/contrib/tsearch2/expected/tsearch2.out
index e84e4d27f2..eef85ef09d 100644
--- a/contrib/tsearch2/expected/tsearch2.out
+++ b/contrib/tsearch2/expected/tsearch2.out
@@ -1,4 +1,12 @@
 CREATE EXTENSION tsearch2;
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+ amname | opcname 
+--------+---------
+(0 rows)
+
 --tsvector
 SELECT '1'::tsvector;
  tsvector 
diff --git a/contrib/tsearch2/sql/tsearch2.sql b/contrib/tsearch2/sql/tsearch2.sql
index 53e3073af4..2c37c4a1dd 100644
--- a/contrib/tsearch2/sql/tsearch2.sql
+++ b/contrib/tsearch2/sql/tsearch2.sql
@@ -1,5 +1,10 @@
 CREATE EXTENSION tsearch2;
 
+-- Check whether any of our opclasses fail amvalidate
+SELECT amname, opcname
+FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
+WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+
 --tsvector
 SELECT '1'::tsvector;
 SELECT '1 '::tsvector;