diff --git a/src/test/regress/expected/collate.linux.utf8.out b/src/test/regress/expected/collate.linux.utf8.out
index c065ae98ebb49f10b93b64ff3acb73ff3999912a..5d25f9fdd5a2fa03c6220862e8b933a417c5a6e1 100644
--- a/src/test/regress/expected/collate.linux.utf8.out
+++ b/src/test/regress/expected/collate.linux.utf8.out
@@ -421,7 +421,7 @@ SELECT table_name, view_definition FROM information_schema.views
  collview3  | SELECT collate_test10.a, lower(((collate_test10.x || collate_test10.x) COLLATE "C")) AS lower FROM collate_test10;
 (3 rows)
 
--- collation propagation in various expression type
+-- collation propagation in various expression types
 SELECT a, coalesce(b, 'foo') FROM collate_test1 ORDER BY 2;
  a | coalesce 
 ---+----------
diff --git a/src/test/regress/expected/collate.out b/src/test/regress/expected/collate.out
index 627ae1f3f8f7749b607a67ba41659b6e92eb705f..dc17feaefe41e2ead7e69ea8a9bcccdc06a4670e 100644
--- a/src/test/regress/expected/collate.out
+++ b/src/test/regress/expected/collate.out
@@ -201,7 +201,7 @@ SELECT table_name, view_definition FROM information_schema.views
  collview3  | SELECT collate_test10.a, lower(((collate_test10.x || collate_test10.x) COLLATE "POSIX")) AS lower FROM collate_test10;
 (3 rows)
 
--- collation propagation in various expression type
+-- collation propagation in various expression types
 SELECT a, coalesce(b, 'foo') FROM collate_test1 ORDER BY 2;
  a | coalesce 
 ---+----------
diff --git a/src/test/regress/sql/collate.linux.utf8.sql b/src/test/regress/sql/collate.linux.utf8.sql
index e16d96a3316dfe33cce92c5977c5e00105e06b23..73f5587b700f5c616c95007d73652e987386e242 100644
--- a/src/test/regress/sql/collate.linux.utf8.sql
+++ b/src/test/regress/sql/collate.linux.utf8.sql
@@ -161,7 +161,7 @@ SELECT table_name, view_definition FROM information_schema.views
   WHERE table_name LIKE 'collview%' ORDER BY 1;
 
 
--- collation propagation in various expression type
+-- collation propagation in various expression types
 
 SELECT a, coalesce(b, 'foo') FROM collate_test1 ORDER BY 2;
 SELECT a, coalesce(b, 'foo') FROM collate_test2 ORDER BY 2;
diff --git a/src/test/regress/sql/collate.sql b/src/test/regress/sql/collate.sql
index 9585852bc543f3c9c9bd05f45ef5ba0c4f15c465..52d830d58a976282cda1c7246ec06f45dce36e3c 100644
--- a/src/test/regress/sql/collate.sql
+++ b/src/test/regress/sql/collate.sql
@@ -99,7 +99,7 @@ SELECT table_name, view_definition FROM information_schema.views
   WHERE table_name LIKE 'collview%' ORDER BY 1;
 
 
--- collation propagation in various expression type
+-- collation propagation in various expression types
 
 SELECT a, coalesce(b, 'foo') FROM collate_test1 ORDER BY 2;
 SELECT a, coalesce(b, 'foo') FROM collate_test2 ORDER BY 2;