diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/router/TestDFSRouter.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/router/TestDFSRouter.java
index 1ab0e9a2ae..ff279c84d2 100644
--- a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/router/TestDFSRouter.java
+++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/router/TestDFSRouter.java
@@ -21,8 +21,16 @@
 import org.junit.Test;
 
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.ha.HAServiceProtocol;
+import org.apache.hadoop.hdfs.server.federation.MockResolver;
+import org.apache.hadoop.hdfs.server.federation.resolver.ActiveNamenodeResolver;
+import org.apache.hadoop.hdfs.server.federation.resolver.FileSubclusterResolver;
 import org.apache.hadoop.tools.fedbalance.FedBalanceConfigs;
 
+import static org.apache.hadoop.hdfs.server.federation.FederationTestUtils.createNamenodeReport;
+import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.FEDERATION_STORE_MEMBERSHIP_EXPIRATION_MS;
+import static org.junit.Assert.assertEquals;
+
 public class TestDFSRouter {
 
   @Test
@@ -36,4 +44,45 @@ public void testDefaultConfigs() {
     Assert.assertEquals(10, workerThreads);
   }
 
+  @Test
+  public void testClearStaleNamespacesInRouterStateIdContext() throws Exception {
+    Router testRouter = new Router();
+    Configuration routerConfig = DFSRouter.getConfiguration();
+    routerConfig.set(FEDERATION_STORE_MEMBERSHIP_EXPIRATION_MS, "2000");
+    routerConfig.set(RBFConfigKeys.DFS_ROUTER_SAFEMODE_ENABLE, "false");
+    // Mock resolver classes
+    routerConfig.setClass(RBFConfigKeys.FEDERATION_NAMENODE_RESOLVER_CLIENT_CLASS,
+        MockResolver.class, ActiveNamenodeResolver.class);
+    routerConfig.setClass(RBFConfigKeys.FEDERATION_FILE_RESOLVER_CLIENT_CLASS,
+        MockResolver.class, FileSubclusterResolver.class);
+
+    testRouter.init(routerConfig);
+    String nsID1 = "ns0";
+    String nsID2 = "ns1";
+    MockResolver resolver = (MockResolver)testRouter.getNamenodeResolver();
+    resolver.registerNamenode(createNamenodeReport(nsID1, "nn1",
+        HAServiceProtocol.HAServiceState.ACTIVE));
+    resolver.registerNamenode(createNamenodeReport(nsID2, "nn1",
+        HAServiceProtocol.HAServiceState.ACTIVE));
+
+    RouterRpcServer rpcServer = testRouter.getRpcServer();
+
+    rpcServer.getRouterStateIdContext().getNamespaceStateId(nsID1);
+    rpcServer.getRouterStateIdContext().getNamespaceStateId(nsID2);
+
+    resolver.disableNamespace(nsID1);
+    Thread.sleep(3000);
+    RouterStateIdContext context = rpcServer.getRouterStateIdContext();
+    assertEquals(2, context.getNamespaceIdMap().size());
+
+    testRouter.start();
+    Thread.sleep(3000);
+    // wait clear stale namespaces
+    RouterStateIdContext routerStateIdContext = rpcServer.getRouterStateIdContext();
+    int size = routerStateIdContext.getNamespaceIdMap().size();
+    assertEquals(1, size);
+    rpcServer.stop();
+    rpcServer.close();
+    testRouter.close();
+  }
 }
\ No newline at end of file
diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/router/TestRouterRpc.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/router/TestRouterRpc.java
index f531e403d3..766a035151 100644
--- a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/router/TestRouterRpc.java
+++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/router/TestRouterRpc.java
@@ -23,12 +23,10 @@
 import static org.apache.hadoop.hdfs.server.federation.FederationTestUtils.addDirectory;
 import static org.apache.hadoop.hdfs.server.federation.FederationTestUtils.countContents;
 import static org.apache.hadoop.hdfs.server.federation.FederationTestUtils.createFile;
-import static org.apache.hadoop.hdfs.server.federation.FederationTestUtils.createNamenodeReport;
 import static org.apache.hadoop.hdfs.server.federation.FederationTestUtils.deleteFile;
 import static org.apache.hadoop.hdfs.server.federation.FederationTestUtils.getFileStatus;
 import static org.apache.hadoop.hdfs.server.federation.FederationTestUtils.verifyFileExists;
 import static org.apache.hadoop.hdfs.server.federation.MiniRouterDFSCluster.TEST_STRING;
-import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.FEDERATION_STORE_MEMBERSHIP_EXPIRATION_MS;
 import static org.apache.hadoop.ipc.CallerContext.PROXY_USER_PORT;
 import static org.apache.hadoop.test.GenericTestUtils.assertExceptionContains;
 import static org.assertj.core.api.Assertions.assertThat;
@@ -74,7 +72,6 @@
 import org.apache.hadoop.fs.SafeModeAction;
 import org.apache.hadoop.fs.RemoteIterator;
 import org.apache.hadoop.fs.permission.FsPermission;
-import org.apache.hadoop.ha.HAServiceProtocol;
 import org.apache.hadoop.hdfs.DFSClient;
 import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.DFSTestUtil;
@@ -118,7 +115,6 @@
 import org.apache.hadoop.hdfs.server.federation.metrics.FederationRPCMetrics;
 import org.apache.hadoop.hdfs.server.federation.metrics.NamenodeBeanMetrics;
 import org.apache.hadoop.hdfs.server.federation.metrics.RBFMetrics;
-import org.apache.hadoop.hdfs.server.federation.resolver.ActiveNamenodeResolver;
 import org.apache.hadoop.hdfs.server.federation.resolver.FileSubclusterResolver;
 import org.apache.hadoop.hdfs.server.namenode.FSDirectory;
 import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
@@ -2331,46 +2327,4 @@ public void testGetListingOrder() throws Exception {
       fileSystem1.delete(new Path(testPath2), true);
     }
   }
-
-  @Test
-  public void testClearStaleNamespacesInRouterStateIdContext() throws Exception {
-    Router testRouter = new Router();
-    Configuration routerConfig = DFSRouter.getConfiguration();
-    routerConfig.set(FEDERATION_STORE_MEMBERSHIP_EXPIRATION_MS, "2000");
-    routerConfig.set(RBFConfigKeys.DFS_ROUTER_SAFEMODE_ENABLE, "false");
-    // Mock resolver classes
-    routerConfig.setClass(RBFConfigKeys.FEDERATION_NAMENODE_RESOLVER_CLIENT_CLASS,
-        MockResolver.class, ActiveNamenodeResolver.class);
-    routerConfig.setClass(RBFConfigKeys.FEDERATION_FILE_RESOLVER_CLIENT_CLASS,
-        MockResolver.class, FileSubclusterResolver.class);
-
-    testRouter.init(routerConfig);
-    String nsID1 = cluster.getNameservices().get(0);
-    String nsID2 = cluster.getNameservices().get(1);
-    MockResolver resolver = (MockResolver)testRouter.getNamenodeResolver();
-    resolver.registerNamenode(createNamenodeReport(nsID1, "nn1",
-        HAServiceProtocol.HAServiceState.ACTIVE));
-    resolver.registerNamenode(createNamenodeReport(nsID2, "nn1",
-        HAServiceProtocol.HAServiceState.ACTIVE));
-
-    RouterRpcServer rpcServer = testRouter.getRpcServer();
-
-    rpcServer.getRouterStateIdContext().getNamespaceStateId(nsID1);
-    rpcServer.getRouterStateIdContext().getNamespaceStateId(nsID2);
-
-    resolver.disableNamespace(nsID1);
-    Thread.sleep(3000);
-    RouterStateIdContext context = rpcServer.getRouterStateIdContext();
-    assertEquals(2, context.getNamespaceIdMap().size());
-
-    testRouter.start();
-    Thread.sleep(3000);
-    // wait clear stale namespaces
-    RouterStateIdContext routerStateIdContext = rpcServer.getRouterStateIdContext();
-    int size = routerStateIdContext.getNamespaceIdMap().size();
-    assertEquals(1, size);
-    rpcServer.stop();
-    rpcServer.close();
-    testRouter.close();
-  }
 }