diff --git a/infra/common/src/main/java/org/apache/shardingsphere/infra/metadata/database/schema/manager/SystemSchemaManager.java b/infra/common/src/main/java/org/apache/shardingsphere/infra/metadata/database/schema/manager/SystemSchemaManager.java
index 9dcb830da82c2..c8ea76be5be17 100644
--- a/infra/common/src/main/java/org/apache/shardingsphere/infra/metadata/database/schema/manager/SystemSchemaManager.java
+++ b/infra/common/src/main/java/org/apache/shardingsphere/infra/metadata/database/schema/manager/SystemSchemaManager.java
@@ -61,11 +61,11 @@ public final class SystemSchemaManager {
     }
     
     /**
-     * Judge whether current table is system table or not.
+     * Judge whether the current table is system table.
      *
      * @param schema schema
      * @param tableName table name
-     * @return whether current table is system table or not
+     * @return is system table or not
      */
     public static boolean isSystemTable(final String schema, final String tableName) {
         for (Entry<String, Map<String, Collection<String>>> entry : DATABASE_TYPE_SCHEMA_TABLE_MAP.entrySet()) {
@@ -77,12 +77,12 @@ public static boolean isSystemTable(final String schema, final String tableName)
     }
     
     /**
-     * Judge whether current table is system table or not.
+     * Judge whether the current table is system table.
      *
      * @param databaseType database type
      * @param schema schema
      * @param tableName table name
-     * @return whether current table is system table or not
+     * @return is system table or not
      */
     public static boolean isSystemTable(final String databaseType, final String schema, final String tableName) {
         Map<String, Collection<String>> schemaTableMap = DATABASE_TYPE_SCHEMA_TABLE_MAP.getOrDefault(databaseType, Collections.emptyMap());
@@ -94,12 +94,12 @@ public static boolean isSystemTable(final String databaseType, final String sche
     }
     
     /**
-     * Judge whether current table is system table or not.
+     * Judge whether the current table is system table.
      *
      * @param databaseType database type
      * @param schema schema
      * @param tableNames table names
-     * @return whether current table is system table or not
+     * @return is system table or not
      */
     public static boolean isSystemTable(final String databaseType, final String schema, final Collection<String> tableNames) {
         Collection<String> databaseTypeTables = Optional.ofNullable(DATABASE_TYPE_SCHEMA_TABLE_MAP.get(databaseType)).map(schemas -> schemas.get(schema)).orElse(Collections.emptyList());
@@ -131,7 +131,7 @@ public static Collection<String> getTables(final String databaseType, final Stri
      *
      * @param databaseType database type
      * @param schema schema
-     * @return inputStream collection
+     * @return input streams
      */
     public static Collection<InputStream> getAllInputStreams(final String databaseType, final String schema) {
         Collection<InputStream> result = new LinkedList<>();
diff --git a/infra/common/src/test/java/org/apache/shardingsphere/infra/metadata/database/schema/manager/SystemSchemaManagerTest.java b/infra/common/src/test/java/org/apache/shardingsphere/infra/metadata/database/schema/manager/SystemSchemaManagerTest.java
index a88453a05a59c..5566ff2779d17 100644
--- a/infra/common/src/test/java/org/apache/shardingsphere/infra/metadata/database/schema/manager/SystemSchemaManagerTest.java
+++ b/infra/common/src/test/java/org/apache/shardingsphere/infra/metadata/database/schema/manager/SystemSchemaManagerTest.java
@@ -19,11 +19,15 @@
 
 import org.junit.jupiter.api.Test;
 
+import java.io.InputStream;
+import java.util.Arrays;
 import java.util.Collection;
+import java.util.Collections;
 
 import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 class SystemSchemaManagerTest {
@@ -83,4 +87,38 @@ void assertIsisSystemTable() {
         assertTrue(SystemSchemaManager.isSystemTable("shardingsphere", "cluster_information"));
         assertFalse(SystemSchemaManager.isSystemTable("shardingsphere", "nonexistent"));
     }
+    
+    @Test
+    void assertIsSystemTableWithDatabaseTypeAndNullSchema() {
+        assertTrue(SystemSchemaManager.isSystemTable("MySQL", null, "columns"));
+        assertTrue(SystemSchemaManager.isSystemTable("PostgreSQL", null, "pg_database"));
+        assertFalse(SystemSchemaManager.isSystemTable("MySQL", null, "nonexistent_table"));
+    }
+    
+    @Test
+    void assertIsSystemTableWithDatabaseTypeAndSchema() {
+        assertTrue(SystemSchemaManager.isSystemTable("MySQL", "information_schema", "columns"));
+        assertTrue(SystemSchemaManager.isSystemTable("PostgreSQL", "pg_catalog", "pg_database"));
+        assertTrue(SystemSchemaManager.isSystemTable("MySQL", "shardingsphere", "cluster_information"));
+        assertFalse(SystemSchemaManager.isSystemTable("MySQL", "information_schema", "nonexistent_table"));
+        assertFalse(SystemSchemaManager.isSystemTable("NonExistentDB", "test_schema", "test_table"));
+    }
+    
+    @Test
+    void assertIsSystemTableWithTableNamesCollection() {
+        assertTrue(SystemSchemaManager.isSystemTable("MySQL", "information_schema", Arrays.asList("columns", "tables", "schemata")));
+        assertFalse(SystemSchemaManager.isSystemTable("MySQL", "information_schema", Arrays.asList("columns", "nonexistent_table")));
+        assertTrue(SystemSchemaManager.isSystemTable("PostgreSQL", "pg_catalog", Arrays.asList("pg_database", "pg_tables")));
+        assertFalse(SystemSchemaManager.isSystemTable("NonExistentDB", "test_schema", Collections.singleton("test_table")));
+        assertTrue(SystemSchemaManager.isSystemTable("MySQL", "nonexistent_schema", Collections.emptyList()));
+    }
+    
+    @Test
+    void assertGetAllInputStreams() {
+        java.util.Collection<java.io.InputStream> actual = SystemSchemaManager.getAllInputStreams("MySQL", "information_schema");
+        assertThat(actual.size(), is(95));
+        for (InputStream each : actual) {
+            assertNotNull(each);
+        }
+    }
 }
diff --git a/infra/common/src/test/resources/logback-test.xml b/infra/common/src/test/resources/logback-test.xml
new file mode 100644
index 0000000000000..b420ff1121035
--- /dev/null
+++ b/infra/common/src/test/resources/logback-test.xml
@@ -0,0 +1,33 @@
+<?xml version="1.0"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one or more
+  ~ contributor license agreements.  See the NOTICE file distributed with
+  ~ this work for additional information regarding copyright ownership.
+  ~ The ASF licenses this file to You under the Apache License, Version 2.0
+  ~ (the "License"); you may not use this file except in compliance with
+  ~ the License.  You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<configuration>
+    <statusListener class="ch.qos.logback.core.status.NopStatusListener" />
+    <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %logger{36} - %msg%n</pattern>
+        </encoder>
+    </appender>
+    <logger name="org.apache.shardingsphere" level="warn" additivity="true">
+        <appender-ref ref="console" />
+    </logger>
+    <root>
+        <level value="info" />
+        <appender-ref ref="console" />
+    </root>
+</configuration>