diff --git a/kyuubi-server/pom.xml b/kyuubi-server/pom.xml
index f1c9d1f42..b384f8793 100644
--- a/kyuubi-server/pom.xml
+++ b/kyuubi-server/pom.xml
@@ -123,6 +123,11 @@
             <groupId>org.mockito</groupId>
             <artifactId>mockito-core</artifactId>
         </dependency>
+
+        <dependency>
+            <groupId>org.apache.hadoop</groupId>
+            <artifactId>hadoop-minicluster</artifactId>
+        </dependency>
     </dependencies>
 
     <build>
diff --git a/kyuubi-server/src/main/scala/yaooqinn/kyuubi/utils/KyuubiHadoopUtil.scala b/kyuubi-server/src/main/scala/yaooqinn/kyuubi/utils/KyuubiHadoopUtil.scala
index ae32fd8dd..88a560486 100644
--- a/kyuubi-server/src/main/scala/yaooqinn/kyuubi/utils/KyuubiHadoopUtil.scala
+++ b/kyuubi-server/src/main/scala/yaooqinn/kyuubi/utils/KyuubiHadoopUtil.scala
@@ -23,6 +23,7 @@ import scala.collection.JavaConverters._
 
 import org.apache.hadoop.security.UserGroupInformation
 import org.apache.hadoop.yarn.api.records.ApplicationReport
+import org.apache.hadoop.yarn.api.records.YarnApplicationState._
 import org.apache.hadoop.yarn.client.api.YarnClient
 import org.apache.hadoop.yarn.conf.YarnConfiguration
 
@@ -41,7 +42,12 @@ private[kyuubi] object KyuubiHadoopUtil {
   }
 
   def getApplications: Seq[ApplicationReport] = {
-    yarnClient.getApplications(Set("SPARK").asJava).asScala
+    yarnClient.getApplications(Set("SPARK").asJava).asScala.filter { p =>
+      p.getYarnApplicationState match {
+        case ACCEPTED | NEW | NEW_SAVING | SUBMITTED | RUNNING => true
+        case _ => false
+      }
+    }
   }
 
   def killYarnAppByName(appName: String): Unit = {
diff --git a/kyuubi-server/src/test/resources/kyuubi-test.conf b/kyuubi-server/src/test/resources/kyuubi-test.conf
index 959d1520e..1b18a9d1b 100644
--- a/kyuubi-server/src/test/resources/kyuubi-test.conf
+++ b/kyuubi-server/src/test/resources/kyuubi-test.conf
@@ -1 +1 @@
-spark.kyuubi.test 1
\ No newline at end of file
+spark.kyuubi.test=1
diff --git a/kyuubi-server/src/test/resources/yarn-site.xml b/kyuubi-server/src/test/resources/yarn-site.xml
new file mode 100644
index 000000000..c2d99557e
--- /dev/null
+++ b/kyuubi-server/src/test/resources/yarn-site.xml
@@ -0,0 +1,32 @@
+<!--
+  ~ 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>
+    <property>
+        <name>yarn.resourcemanager.address</name>
+        <value>localhost:37001</value>
+    </property>
+
+    <property>
+        <name>yarn.resourcemanager.hostname</name>
+        <value></value>
+    </property>
+    <property>
+        <name>yarn.minicluster.fixed.ports</name>
+        <value>true</value>
+    </property>
+</configuration>
diff --git a/kyuubi-server/src/test/scala/org/apache/spark/KyuubiConfSuite.scala b/kyuubi-server/src/test/scala/org/apache/spark/KyuubiConfSuite.scala
index 7dee58252..da0a1bdfa 100644
--- a/kyuubi-server/src/test/scala/org/apache/spark/KyuubiConfSuite.scala
+++ b/kyuubi-server/src/test/scala/org/apache/spark/KyuubiConfSuite.scala
@@ -43,4 +43,10 @@ class KyuubiConfSuite extends SparkFunSuite {
     }
     assert(conf.get(KyuubiConf.AUTHENTICATION_METHOD) === "KERBEROS")
   }
+
+  test("register") {
+    val e = intercept[IllegalArgumentException](
+      KyuubiConf.register(KyuubiConf.AUTHENTICATION_METHOD))
+    assert(e.getMessage.contains("spark.kyuubi.authentication has been registered"))
+  }
 }
diff --git a/kyuubi-server/src/test/scala/yaooqinn/kyuubi/KyuubiConfSuite.scala b/kyuubi-server/src/test/scala/yaooqinn/kyuubi/KyuubiConfSuite.scala
new file mode 100644
index 000000000..95c42a84d
--- /dev/null
+++ b/kyuubi-server/src/test/scala/yaooqinn/kyuubi/KyuubiConfSuite.scala
@@ -0,0 +1,42 @@
+/*
+ * 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.
+ */
+
+package yaooqinn.kyuubi
+
+import org.apache.spark.{KyuubiConf, SparkConf, SparkFunSuite}
+import org.apache.spark.KyuubiConf._
+
+class KyuubiConfSuite extends SparkFunSuite {
+  private val conf: SparkConf = new SparkConf()
+
+  KyuubiConf.getAllDefaults.foreach { case (k, v) => conf.set(k, v) }
+  test("implicits") {
+
+    assert(conf.getOption(AUTHORIZATION_ENABLE).nonEmpty)
+    assert(!conf.get(AUTHORIZATION_ENABLE).toBoolean)
+
+    assert(conf.getOption(YARN_CONTAINER_TIMEOUT).nonEmpty)
+    assert(conf.get(YARN_CONTAINER_TIMEOUT) === "60000ms")
+
+    assert(conf.getOption(BACKEND_SESSION_WAIT_OTHER_TIMES).nonEmpty)
+    assert(conf.get(BACKEND_SESSION_WAIT_OTHER_TIMES).toInt === 60)
+
+    assert(conf.getOption(AUTHENTICATION_METHOD).nonEmpty)
+    assert(conf.get(AUTHENTICATION_METHOD) === "NONE")
+  }
+
+}
diff --git a/kyuubi-server/src/test/scala/yaooqinn/kyuubi/utils/KyuubiHadoopUtilSuite.scala b/kyuubi-server/src/test/scala/yaooqinn/kyuubi/utils/KyuubiHadoopUtilSuite.scala
new file mode 100644
index 000000000..bd67357b6
--- /dev/null
+++ b/kyuubi-server/src/test/scala/yaooqinn/kyuubi/utils/KyuubiHadoopUtilSuite.scala
@@ -0,0 +1,112 @@
+/*
+ * 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.
+ */
+
+package yaooqinn.kyuubi.utils
+
+import org.apache.hadoop.conf.Configuration
+import org.apache.hadoop.security.UserGroupInformation
+import org.apache.hadoop.yarn.api.records.{ApplicationId, ContainerLaunchContext, Resource, YarnApplicationState}
+import org.apache.hadoop.yarn.client.api.YarnClient
+import org.apache.hadoop.yarn.server.MiniYARNCluster
+import org.apache.hadoop.yarn.util.Records
+import org.apache.spark.SparkFunSuite
+import org.scalatest.BeforeAndAfterEach
+
+class KyuubiHadoopUtilSuite extends SparkFunSuite with BeforeAndAfterEach {
+
+  private var cluster: MiniYARNCluster = _
+  private val yarnClient = YarnClient.createYarnClient()
+
+  override def beforeAll(): Unit = {
+    cluster = new MiniYARNCluster(this.getClass.getSimpleName, 1, 1, 1, 1)
+    val hadoopConf = new Configuration()
+    cluster.init(hadoopConf)
+    cluster.start()
+    yarnClient.init(hadoopConf)
+    yarnClient.start()
+    super.beforeAll()
+  }
+
+  override def afterAll(): Unit = {
+    cluster.stop()
+    super.afterAll()
+  }
+
+  override def beforeEach(): Unit = {
+
+    super.beforeEach()
+  }
+
+  test("kill yarn application by name") {
+    withYarnApplication { id =>
+      KyuubiHadoopUtil.killYarnAppByName(id.toString)
+      assert(KyuubiHadoopUtil.getApplications.isEmpty)
+    }
+  }
+
+  test("kill yarn application by id") {
+    withYarnApplication { id =>
+      KyuubiHadoopUtil.killYarnApp(yarnClient.getApplicationReport(id))
+      assert(KyuubiHadoopUtil.getApplications.isEmpty)
+    }
+  }
+
+  test("do as") {
+
+    val user1 = UserGroupInformation.getCurrentUser
+    val userName1 = user1.getShortUserName
+    val userName2 = "test"
+    val user2 = UserGroupInformation.createProxyUser(userName2, user1)
+
+    def testf(expectedUser: String): Boolean = {
+      UserGroupInformation.getCurrentUser.getShortUserName == expectedUser
+    }
+
+    KyuubiHadoopUtil.doAs(user1) {
+      testf(userName1)
+    }
+
+    KyuubiHadoopUtil.doAs(user2) {
+      testf(userName2)
+    }
+  }
+
+  test("get applications") {
+    withYarnApplication { id =>
+      assert(KyuubiHadoopUtil.getApplications.head.getApplicationId === id)
+    }
+  }
+
+  def withYarnApplication(f: ApplicationId => Unit): Unit = {
+    val application = yarnClient.createApplication()
+    val response = application.getNewApplicationResponse
+    val applicationId = response.getApplicationId
+    val context = application.getApplicationSubmissionContext
+    context.setApplicationName(applicationId.toString)
+    context.setApplicationType("SPARK")
+    val capability = Records.newRecord(classOf[Resource])
+    capability.setMemory(10)
+    capability.setVirtualCores(1)
+    context.setResource(capability)
+    context.setAMContainerSpec(Records.newRecord(classOf[ContainerLaunchContext]))
+    yarnClient.submitApplication(context)
+    assert(KyuubiHadoopUtil.getApplications.nonEmpty)
+    assert(KyuubiHadoopUtil.getApplications.head.getYarnApplicationState !==
+      YarnApplicationState.KILLED)
+    f(applicationId)
+  }
+}
diff --git a/pom.xml b/pom.xml
index f55ab90bd..2b14acee8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -324,6 +324,12 @@
                 <version>1.10.19</version>
                 <scope>test</scope>
             </dependency>
+            <dependency>
+                <groupId>org.apache.hadoop</groupId>
+                <artifactId>hadoop-minicluster</artifactId>
+                <version>${hadoop.version}</version>
+                <scope>test</scope>
+            </dependency>
         </dependencies>
     </dependencyManagement>
 
@@ -345,7 +351,7 @@
         <profile>
             <id>spark-2.3</id>
             <properties>
-                <spark.version>2.3.1</spark.version>
+                <spark.version>2.3.2</spark.version>
                 <scalatest.version>3.0.3</scalatest.version>
             </properties>
         </profile>