diff --git a/tests/cases/standalone/common/create/create_database.result b/tests/cases/standalone/common/create/create_database.result
index da409471c2bb..9c1e6a095623 100644
--- a/tests/cases/standalone/common/create/create_database.result
+++ b/tests/cases/standalone/common/create/create_database.result
@@ -21,3 +21,7 @@ show databases;
 | public             |
 +--------------------+
 
+drop database 'illegal-database';
+
+Affected Rows: 0
+
diff --git a/tests/cases/standalone/common/create/create_database.sql b/tests/cases/standalone/common/create/create_database.sql
index 0116e2bcce1a..4c6a854f8b3b 100644
--- a/tests/cases/standalone/common/create/create_database.sql
+++ b/tests/cases/standalone/common/create/create_database.sql
@@ -5,3 +5,5 @@ create database 'illegal-database';
 create database '㊙️database';
 
 show databases;
+
+drop database 'illegal-database';
diff --git a/tests/cases/standalone/common/create/upper_case_table_name.result b/tests/cases/standalone/common/create/upper_case_table_name.result
index 13a00fd8d913..33e186a63d5b 100644
--- a/tests/cases/standalone/common/create/upper_case_table_name.result
+++ b/tests/cases/standalone/common/create/upper_case_table_name.result
@@ -98,6 +98,10 @@ drop table abcdefge;
 
 Affected Rows: 0
 
+drop database upper_case_table_name;
+
+Affected Rows: 0
+
 use public;
 
 Affected Rows: 0
diff --git a/tests/cases/standalone/common/create/upper_case_table_name.sql b/tests/cases/standalone/common/create/upper_case_table_name.sql
index 5cade9edfd05..76625e0159af 100644
--- a/tests/cases/standalone/common/create/upper_case_table_name.sql
+++ b/tests/cases/standalone/common/create/upper_case_table_name.sql
@@ -40,4 +40,6 @@ desc table abcdefge;
 
 drop table abcdefge;
 
+drop database upper_case_table_name;
+
 use public;
diff --git a/tests/cases/standalone/common/show/show_databases_tables.result b/tests/cases/standalone/common/show/show_databases_tables.result
index 90fc27f88bb5..1f35687d20ed 100644
--- a/tests/cases/standalone/common/show/show_databases_tables.result
+++ b/tests/cases/standalone/common/show/show_databases_tables.result
@@ -1,14 +1,12 @@
 show databases;
 
-+-----------------------+
-| Database              |
-+-----------------------+
-| greptime_private      |
-| illegal-database      |
-| information_schema    |
-| public                |
-| upper_case_table_name |
-+-----------------------+
++--------------------+
+| Database           |
++--------------------+
+| greptime_private   |
+| information_schema |
+| public             |
++--------------------+
 
 use information_schema;
 
diff --git a/tests/cases/standalone/common/system/information_schema.result b/tests/cases/standalone/common/system/information_schema.result
index 76e565bec5bb..c25cea096cf0 100644
--- a/tests/cases/standalone/common/system/information_schema.result
+++ b/tests/cases/standalone/common/system/information_schema.result
@@ -501,14 +501,12 @@ desc table schemata;
 
 select * from schemata where catalog_name = 'greptime' and schema_name != 'public' order by catalog_name, schema_name;
 
-+--------------+-----------------------+----------------------------+------------------------+----------+
-| catalog_name | schema_name           | default_character_set_name | default_collation_name | sql_path |
-+--------------+-----------------------+----------------------------+------------------------+----------+
-| greptime     | greptime_private      | utf8                       | utf8_bin               |          |
-| greptime     | illegal-database      | utf8                       | utf8_bin               |          |
-| greptime     | information_schema    | utf8                       | utf8_bin               |          |
-| greptime     | upper_case_table_name | utf8                       | utf8_bin               |          |
-+--------------+-----------------------+----------------------------+------------------------+----------+
++--------------+--------------------+----------------------------+------------------------+----------+
+| catalog_name | schema_name        | default_character_set_name | default_collation_name | sql_path |
++--------------+--------------------+----------------------------+------------------------+----------+
+| greptime     | greptime_private   | utf8                       | utf8_bin               |          |
+| greptime     | information_schema | utf8                       | utf8_bin               |          |
++--------------+--------------------+----------------------------+------------------------+----------+
 
 -- test engines
 select * from engines;
diff --git a/tests/cases/standalone/common/tql/case_sensitive.result b/tests/cases/standalone/common/tql/case_sensitive.result
index e98e41a71b3e..e4e305a27e6c 100644
--- a/tests/cases/standalone/common/tql/case_sensitive.result
+++ b/tests/cases/standalone/common/tql/case_sensitive.result
@@ -75,3 +75,7 @@ drop table "AnotherSchema"."MemTotal";
 
 Affected Rows: 0
 
+drop schema "AnotherSchema";
+
+Affected Rows: 0
+
diff --git a/tests/cases/standalone/common/tql/case_sensitive.sql b/tests/cases/standalone/common/tql/case_sensitive.sql
index 6e75974abfc9..2aea15bb8387 100644
--- a/tests/cases/standalone/common/tql/case_sensitive.sql
+++ b/tests/cases/standalone/common/tql/case_sensitive.sql
@@ -37,3 +37,5 @@ tql eval (0,10,'5s') sum(MemAvailable / 4) + sum({__name__="AnotherSchema.MemTot
 drop table "MemAvailable";
 
 drop table "AnotherSchema"."MemTotal";
+
+drop schema "AnotherSchema";