diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController.java
index ffabe347183..9a451166481 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController.java
@@ -20,7 +20,6 @@ package org.apache.hadoop.hbase.security.access;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
@@ -288,7 +287,10 @@ public class TestAccessController extends SecureTestUtil {
     }
     // Verify all table/namespace permissions are erased
     assertEquals(0, AccessControlLists.getTablePermissions(conf, TEST_TABLE.getTableName()).size());
-    assertEquals(0, AccessControlLists.getNamespacePermissions(conf, TEST_TABLE.getTableName().getNameAsString()).size());
+    assertEquals(
+      0,
+      AccessControlLists.getNamespacePermissions(conf,
+        TEST_TABLE.getTableName().getNamespaceAsString()).size());
   }
 
   @Test
@@ -2168,13 +2170,17 @@ public class TestAccessController extends SecureTestUtil {
 
     verifyDenied(getAction, USER_NONE);
 
+    String namespace = "testNamespaceUserGrant";
+    NamespaceDescriptor desc = NamespaceDescriptor.create(namespace).build();
+    TEST_UTIL.getMiniHBaseCluster().getMaster().createNamespace(desc);
+    
     // Grant namespace READ to USER_NONE, this should supersede any table permissions
-    grantOnNamespace(TEST_UTIL, USER_NONE.getShortName(),
-      TEST_TABLE.getTableName().getNamespaceAsString(),
-      Permission.Action.READ);
+    grantOnNamespace(TEST_UTIL, USER_NONE.getShortName(), namespace, Permission.Action.READ);
 
     // Now USER_NONE should be able to read also
     verifyAllowed(getAction, USER_NONE);
+    
+    TEST_UTIL.getMiniHBaseCluster().getMaster().deleteNamespace(namespace);
   }
 
   @Test
@@ -2386,14 +2392,18 @@ public class TestAccessController extends SecureTestUtil {
     // Verify that EXEC permission is checked correctly
     verifyDenied(execEndpointAction, userB);
     verifyAllowed(execEndpointAction, userA);
+    
+    String namespace = "testCoprocessorExec";
+    NamespaceDescriptor desc = NamespaceDescriptor.create(namespace).build();
+    TEST_UTIL.getMiniHBaseCluster().getMaster().createNamespace(desc);
 
     // Now grant EXEC to the entire namespace to user B
-    grantOnNamespace(TEST_UTIL, userB.getShortName(),
-      TEST_TABLE.getTableName().getNamespaceAsString(),
-      Permission.Action.EXEC);
+    grantOnNamespace(TEST_UTIL, userB.getShortName(), namespace, Permission.Action.EXEC);
 
     // User B should now be allowed also
     verifyAllowed(execEndpointAction, userA, userB);
+    
+    TEST_UTIL.getMiniHBaseCluster().getMaster().deleteNamespace(namespace);
   }
 
   @Test