diff --git a/src/test/regress/expected/create_function_0.out b/src/test/regress/expected/create_function_c.out
similarity index 98%
rename from src/test/regress/expected/create_function_0.out
rename to src/test/regress/expected/create_function_c.out
index ed674af971c..2dba9d70349 100644
--- a/src/test/regress/expected/create_function_0.out
+++ b/src/test/regress/expected/create_function_c.out
@@ -1,5 +1,5 @@
 --
--- CREATE_FUNCTION_0
+-- CREATE_FUNCTION_C
 --
 -- This script used to create C functions for other scripts to use.
 -- But to get rid of the ordering dependencies that caused, such
diff --git a/src/test/regress/expected/create_function_3.out b/src/test/regress/expected/create_function_sql.out
similarity index 99%
rename from src/test/regress/expected/create_function_3.out
rename to src/test/regress/expected/create_function_sql.out
index 1e2dfd87d30..f9569554648 100644
--- a/src/test/regress/expected/create_function_3.out
+++ b/src/test/regress/expected/create_function_sql.out
@@ -1,5 +1,5 @@
 --
--- CREATE FUNCTION
+-- CREATE_FUNCTION_SQL
 --
 -- Assorted tests using SQL-language functions
 --
diff --git a/src/test/regress/parallel_schedule b/src/test/regress/parallel_schedule
index 82feda6eb18..6d8f524ae9e 100644
--- a/src/test/regress/parallel_schedule
+++ b/src/test/regress/parallel_schedule
@@ -47,13 +47,13 @@ test: copy copyselect copydml insert insert_conflict
 # More groups of parallel tests
 # Note: many of the tests in later groups depend on create_index
 # ----------
-test: create_function_0 create_misc create_operator create_procedure create_table create_type
+test: create_function_c create_misc create_operator create_procedure create_table create_type
 test: create_index create_index_spgist create_view index_including index_including_gist
 
 # ----------
 # Another group of parallel tests
 # ----------
-test: create_aggregate create_function_3 create_cast constraints triggers select inherit typed_table vacuum drop_if_exists updatable_views roleattributes create_am hash_func errors infinite_recurse
+test: create_aggregate create_function_sql create_cast constraints triggers select inherit typed_table vacuum drop_if_exists updatable_views roleattributes create_am hash_func errors infinite_recurse
 
 # ----------
 # sanity_check does a vacuum, affecting the sort order of SELECT *
diff --git a/src/test/regress/sql/create_function_0.sql b/src/test/regress/sql/create_function_c.sql
similarity index 98%
rename from src/test/regress/sql/create_function_0.sql
rename to src/test/regress/sql/create_function_c.sql
index 54da95f2494..2e5a390a561 100644
--- a/src/test/regress/sql/create_function_0.sql
+++ b/src/test/regress/sql/create_function_c.sql
@@ -1,5 +1,5 @@
 --
--- CREATE_FUNCTION_0
+-- CREATE_FUNCTION_C
 --
 -- This script used to create C functions for other scripts to use.
 -- But to get rid of the ordering dependencies that caused, such
diff --git a/src/test/regress/sql/create_function_3.sql b/src/test/regress/sql/create_function_sql.sql
similarity index 99%
rename from src/test/regress/sql/create_function_3.sql
rename to src/test/regress/sql/create_function_sql.sql
index 254f444d94d..4512456eae2 100644
--- a/src/test/regress/sql/create_function_3.sql
+++ b/src/test/regress/sql/create_function_sql.sql
@@ -1,5 +1,5 @@
 --
--- CREATE FUNCTION
+-- CREATE_FUNCTION_SQL
 --
 -- Assorted tests using SQL-language functions
 --