diff --git a/src/test/modules/test_ddl_deparse/expected/matviews.out b/src/test/modules/test_ddl_deparse/expected/matviews.out
index b946ff06d26..4ac2cc83253 100644
--- a/src/test/modules/test_ddl_deparse/expected/matviews.out
+++ b/src/test/modules/test_ddl_deparse/expected/matviews.out
@@ -2,7 +2,7 @@
 -- Materialized views
 --
 CREATE MATERIALIZED VIEW pg_class_mv AS
-  SELECT * FROM pg_class LIMIT 1 WITH NO DATA;
+  SELECT * FROM datatype_table LIMIT 1 WITH NO DATA;
 NOTICE:  DDL test: type simple, tag CREATE MATERIALIZED VIEW
 REFRESH MATERIALIZED VIEW pg_class_mv;
 NOTICE:  DDL test: type simple, tag REFRESH MATERIALIZED VIEW
diff --git a/src/test/modules/test_ddl_deparse/sql/matviews.sql b/src/test/modules/test_ddl_deparse/sql/matviews.sql
index 381c11e1f84..990082934e3 100644
--- a/src/test/modules/test_ddl_deparse/sql/matviews.sql
+++ b/src/test/modules/test_ddl_deparse/sql/matviews.sql
@@ -3,6 +3,6 @@
 --
 
 CREATE MATERIALIZED VIEW pg_class_mv AS
-  SELECT * FROM pg_class LIMIT 1 WITH NO DATA;
+  SELECT * FROM datatype_table LIMIT 1 WITH NO DATA;
 
 REFRESH MATERIALIZED VIEW pg_class_mv;