--- sql/pgtap.sql
+++ sql/pgtap.sql
@@ -9,6 +9,11 @@
 RETURNS text AS 'SELECT current_setting(''server_version'')'
 LANGUAGE SQL IMMUTABLE;
 
+CREATE OR REPLACE FUNCTION pg_typeof("any")
+RETURNS regtype
+AS '$libdir/pgtap'
+LANGUAGE C STABLE;
+
 CREATE OR REPLACE FUNCTION pg_version_num()
 RETURNS integer AS $$
     SELECT current_setting('server_version_num')::integer;
@@ -6810,7 +6815,7 @@
     FETCH want INTO want_rec;
     want_found := FOUND;
     WHILE have_found OR want_found LOOP
-        IF have_rec IS DISTINCT FROM want_rec OR have_found <> want_found THEN
+        IF have_rec::text IS DISTINCT FROM want_rec::text OR have_found <> want_found THEN
             RETURN ok( false, $3 ) || E'\n' || diag(
                 '    Results differ beginning at row ' || rownum || E':\n' ||
                 '        have: ' || CASE WHEN have_found THEN have_rec::text ELSE 'NULL' END || E'\n' ||
@@ -6967,7 +6972,7 @@
     FETCH want INTO want_rec;
     want_found := FOUND;
     WHILE have_found OR want_found LOOP
-        IF have_rec IS DISTINCT FROM want_rec OR have_found <> want_found THEN
+        IF have_rec::text IS DISTINCT FROM want_rec::text OR have_found <> want_found THEN
             RETURN ok( true, $3 );
         ELSE
             FETCH have INTO have_rec;
@@ -7176,13 +7181,7 @@
 $$ LANGUAGE sql;
 
 -- collect_tap( tap, tap, tap )
-CREATE OR REPLACE FUNCTION collect_tap( VARIADIC text[] )
-RETURNS TEXT AS $$
-    SELECT array_to_string($1, E'\n');
-$$ LANGUAGE sql;
-
--- collect_tap( tap[] )
-CREATE OR REPLACE FUNCTION collect_tap( VARCHAR[] )
+CREATE OR REPLACE FUNCTION collect_tap( text[] )
 RETURNS TEXT AS $$
     SELECT array_to_string($1, E'\n');
 $$ LANGUAGE sql;
@@ -7658,7 +7657,7 @@
     rec    RECORD;
 BEGIN
     EXECUTE _query($1) INTO rec;
-    IF NOT rec IS DISTINCT FROM $2 THEN RETURN ok(true, $3); END IF;
+    IF NOT rec::text IS DISTINCT FROM $2::text THEN RETURN ok(true, $3); END IF;
     RETURN ok(false, $3 ) || E'\n' || diag(
            '        have: ' || CASE WHEN rec IS NULL THEN 'NULL' ELSE rec::text END ||
         E'\n        want: ' || CASE WHEN $2  IS NULL THEN 'NULL' ELSE $2::text  END