2 files changed, 10 insertions, 8 deletions
diff --git a/src/test/regress/expected/text.out b/src/test/regress/expected/text.out
index 4b1c62bf53c..1587046d95a 100644
--- a/src/test/regress/expected/text.out
+++ b/src/test/regress/expected/text.out
@@ -149,13 +149,13 @@ select concat_ws(',', variadic array[1,2,3]);
  1,2,3
 (1 row)
 
-select concat_ws(',', variadic NULL);
+select concat_ws(',', variadic NULL::int[]);
  concat_ws 
 -----------
  
 (1 row)
 
-select concat(variadic NULL) is NULL;
+select concat(variadic NULL::int[]) is NULL;
  ?column? 
 ----------
  t
@@ -170,6 +170,8 @@ select concat(variadic '{}'::int[]) = '';
 --should fail
 select concat_ws(',', variadic 10);
 ERROR:  VARIADIC argument must be an array
+LINE 1: select concat_ws(',', variadic 10);
+                                       ^
 /*
  * format
  */
@@ -315,8 +317,8 @@ select format('%2$s, %1$s', variadic array[1, 2]);
  2, 1
 (1 row)
 
--- variadic argument can be NULL, but should not be referenced
-select format('Hello', variadic NULL);
+-- variadic argument can be array type NULL, but should not be referenced
+select format('Hello', variadic NULL::int[]);
  format 
 --------
  Hello
diff --git a/src/test/regress/sql/text.sql b/src/test/regress/sql/text.sql
index c4ed74b39d4..60c15b54c0f 100644
--- a/src/test/regress/sql/text.sql
+++ b/src/test/regress/sql/text.sql
@@ -47,8 +47,8 @@ select quote_literal(e'\\');
 -- check variadic labeled argument
 select concat(variadic array[1,2,3]);
 select concat_ws(',', variadic array[1,2,3]);
-select concat_ws(',', variadic NULL);
-select concat(variadic NULL) is NULL;
+select concat_ws(',', variadic NULL::int[]);
+select concat(variadic NULL::int[]) is NULL;
 select concat(variadic '{}'::int[]) = '';
 --should fail
 select concat_ws(',', variadic 10);
@@ -93,8 +93,8 @@ select format('%s, %s', variadic array[true, false]::text[]);
 -- check variadic with positional placeholders
 select format('%2$s, %1$s', variadic array['first', 'second']);
 select format('%2$s, %1$s', variadic array[1, 2]);
--- variadic argument can be NULL, but should not be referenced
-select format('Hello', variadic NULL);
+-- variadic argument can be array type NULL, but should not be referenced
+select format('Hello', variadic NULL::int[]);
 -- variadic argument allows simulating more than FUNC_MAX_ARGS parameters
 select format(string_agg('%s',','), variadic array_agg(i))
 from generate_series(1,200) g(i);