diff --git a/hbase-client/src/test/java/org/apache/hadoop/hbase/security/TestEncryptionUtil.java b/hbase-client/src/test/java/org/apache/hadoop/hbase/security/TestEncryptionUtil.java
index edcee70eb64..907c809d502 100644
--- a/hbase-client/src/test/java/org/apache/hadoop/hbase/security/TestEncryptionUtil.java
+++ b/hbase-client/src/test/java/org/apache/hadoop/hbase/security/TestEncryptionUtil.java
@@ -21,7 +21,6 @@ import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
-import java.io.IOException;
 import java.security.Key;
 import java.security.KeyException;
 import java.security.SecureRandom;
@@ -29,9 +28,7 @@ import java.security.SecureRandom;
 import javax.crypto.spec.SecretKeySpec;
 
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hbase.HColumnDescriptor;
 import org.apache.hadoop.hbase.HConstants;
-import org.apache.hadoop.hbase.io.crypto.Encryption;
 import org.apache.hadoop.hbase.io.crypto.KeyProviderForTesting;
 import org.apache.hadoop.hbase.io.crypto.aes.AES;
 import org.apache.hadoop.hbase.testclassification.ClientTests;
diff --git a/hbase-client/src/test/java/org/apache/hadoop/hbase/zookeeper/TestZKUtil.java b/hbase-client/src/test/java/org/apache/hadoop/hbase/zookeeper/TestZKUtil.java
index eb629f2023b..279547203da 100644
--- a/hbase-client/src/test/java/org/apache/hadoop/hbase/zookeeper/TestZKUtil.java
+++ b/hbase-client/src/test/java/org/apache/hadoop/hbase/zookeeper/TestZKUtil.java
@@ -23,7 +23,6 @@ import java.util.List;
 
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.HBaseConfiguration;
-import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.ZooKeeperConnectionException;
 import org.apache.hadoop.hbase.security.Superusers;
 import org.apache.hadoop.hbase.testclassification.SmallTests;
diff --git a/hbase-common/src/test/java/org/apache/hadoop/hbase/CategoryBasedTimeout.java b/hbase-common/src/test/java/org/apache/hadoop/hbase/CategoryBasedTimeout.java
index 7fd286f8df7..7f7aafd73dc 100644
--- a/hbase-common/src/test/java/org/apache/hadoop/hbase/CategoryBasedTimeout.java
+++ b/hbase-common/src/test/java/org/apache/hadoop/hbase/CategoryBasedTimeout.java
@@ -24,7 +24,6 @@ import org.apache.hadoop.hbase.testclassification.LargeTests;
 import org.apache.hadoop.hbase.testclassification.MediumTests;
 import org.apache.hadoop.hbase.testclassification.SmallTests;
 import org.junit.experimental.categories.Category;
-import org.junit.rules.TestRule;
 import org.junit.rules.Timeout;
 
 /**
diff --git a/hbase-common/src/test/java/org/apache/hadoop/hbase/zookeeper/TestZKConfig.java b/hbase-common/src/test/java/org/apache/hadoop/hbase/zookeeper/TestZKConfig.java
index 7879aea7101..927ca0a1a31 100644
--- a/hbase-common/src/test/java/org/apache/hadoop/hbase/zookeeper/TestZKConfig.java
+++ b/hbase-common/src/test/java/org/apache/hadoop/hbase/zookeeper/TestZKConfig.java
@@ -25,7 +25,6 @@ import org.apache.hadoop.hbase.HBaseConfiguration;
 import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.testclassification.MiscTests;
 import org.apache.hadoop.hbase.testclassification.SmallTests;
-import org.junit.Assert;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
 
diff --git a/hbase-hadoop-compat/src/test/java/org/apache/hadoop/hbase/master/TestMetricsMasterSourceFactory.java b/hbase-hadoop-compat/src/test/java/org/apache/hadoop/hbase/master/TestMetricsMasterSourceFactory.java
index 91efd393ad4..6e2961f9979 100644
--- a/hbase-hadoop-compat/src/test/java/org/apache/hadoop/hbase/master/TestMetricsMasterSourceFactory.java
+++ b/hbase-hadoop-compat/src/test/java/org/apache/hadoop/hbase/master/TestMetricsMasterSourceFactory.java
@@ -19,7 +19,6 @@
 package org.apache.hadoop.hbase.master;
 
 import org.apache.hadoop.hbase.CompatibilitySingletonFactory;
-import org.apache.hadoop.hbase.master.MetricsMasterSource;
 import org.apache.hadoop.hbase.testclassification.SmallTests;
 import org.apache.hadoop.hbase.testclassification.MetricsTests;
 import org.junit.Test;
diff --git a/hbase-hadoop2-compat/src/test/java/org/apache/hadoop/hbase/metrics/TestBaseSourceImpl.java b/hbase-hadoop2-compat/src/test/java/org/apache/hadoop/hbase/metrics/TestBaseSourceImpl.java
index 2e374f7058a..655824fd013 100644
--- a/hbase-hadoop2-compat/src/test/java/org/apache/hadoop/hbase/metrics/TestBaseSourceImpl.java
+++ b/hbase-hadoop2-compat/src/test/java/org/apache/hadoop/hbase/metrics/TestBaseSourceImpl.java
@@ -20,7 +20,6 @@ package org.apache.hadoop.hbase.metrics;
 
 import org.apache.hadoop.hbase.testclassification.SmallTests;
 import org.apache.hadoop.hbase.testclassification.MetricsTests;
-import org.apache.hadoop.metrics2.lib.MutableCounterLong;
 import org.apache.hadoop.metrics2.lib.MutableFastCounter;
 import org.apache.hadoop.metrics2.lib.MutableGaugeLong;
 import org.junit.BeforeClass;
diff --git a/hbase-it/src/test/java/org/apache/hadoop/hbase/mapreduce/IntegrationTestBulkLoad.java b/hbase-it/src/test/java/org/apache/hadoop/hbase/mapreduce/IntegrationTestBulkLoad.java
index 1a8aff64de5..f00127f584a 100644
--- a/hbase-it/src/test/java/org/apache/hadoop/hbase/mapreduce/IntegrationTestBulkLoad.java
+++ b/hbase-it/src/test/java/org/apache/hadoop/hbase/mapreduce/IntegrationTestBulkLoad.java
@@ -80,7 +80,6 @@ import java.io.DataInput;
 import java.io.DataOutput;
 import java.io.IOException;
 import java.util.ArrayList;
-import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Random;
diff --git a/hbase-prefix-tree/src/main/java/org/apache/hadoop/hbase/codec/prefixtree/PrefixTreeSeeker.java b/hbase-prefix-tree/src/main/java/org/apache/hadoop/hbase/codec/prefixtree/PrefixTreeSeeker.java
index 4be72fd38e4..8dae4ea556d 100644
--- a/hbase-prefix-tree/src/main/java/org/apache/hadoop/hbase/codec/prefixtree/PrefixTreeSeeker.java
+++ b/hbase-prefix-tree/src/main/java/org/apache/hadoop/hbase/codec/prefixtree/PrefixTreeSeeker.java
@@ -25,7 +25,6 @@ import org.apache.hadoop.hbase.Cell;
 import org.apache.hadoop.hbase.CellComparator;
 import org.apache.hadoop.hbase.CellUtil;
 import org.apache.hadoop.hbase.KeyValue.Type;
-import org.apache.hadoop.hbase.KeyValueUtil;
 import org.apache.hadoop.hbase.SettableSequenceId;
 import org.apache.hadoop.hbase.classification.InterfaceAudience;
 import org.apache.hadoop.hbase.codec.prefixtree.decode.DecoderFactory;
diff --git a/hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/TestYieldProcedures.java b/hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/TestYieldProcedures.java
index 8269c993143..c4e80e2a51f 100644
--- a/hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/TestYieldProcedures.java
+++ b/hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/TestYieldProcedures.java
@@ -34,14 +34,11 @@ import org.apache.hadoop.hbase.testclassification.MasterTests;
 
 import org.junit.After;
 import org.junit.Before;
-import org.junit.Assert;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
 
 @Category({MasterTests.class, SmallTests.class})
 public class TestYieldProcedures {
@@ -279,4 +276,4 @@ public class TestYieldProcedures {
       return true;
     }
   }
-}
\ No newline at end of file
+}
diff --git a/hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/store/TestProcedureStoreTracker.java b/hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/store/TestProcedureStoreTracker.java
index f565e64b4d0..55ece8a7d4e 100644
--- a/hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/store/TestProcedureStoreTracker.java
+++ b/hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/store/TestProcedureStoreTracker.java
@@ -18,24 +18,19 @@
 
 package org.apache.hadoop.hbase.procedure2.store;
 
-import java.io.InputStream;
-import java.io.OutputStream;
 import java.util.Random;
-import java.util.concurrent.atomic.AtomicLong;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.hbase.testclassification.SmallTests;
 import org.apache.hadoop.hbase.testclassification.MasterTests;
 
-import org.junit.Assert;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
 
 @Category({MasterTests.class, SmallTests.class})
 public class TestProcedureStoreTracker {
diff --git a/hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/store/wal/TestWALProcedureStore.java b/hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/store/wal/TestWALProcedureStore.java
index 120f38b9cfa..b9a439a1276 100644
--- a/hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/store/wal/TestWALProcedureStore.java
+++ b/hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/store/wal/TestWALProcedureStore.java
@@ -49,7 +49,6 @@ import org.apache.hadoop.io.IOUtils;
 
 import org.junit.After;
 import org.junit.Before;
-import org.junit.Assert;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
 
@@ -648,4 +647,4 @@ public class TestWALProcedureStore {
       }
     }
   }
-}
\ No newline at end of file
+}
diff --git a/hbase-rest/src/test/java/org/apache/hadoop/hbase/rest/model/TestNamespacesInstanceModel.java b/hbase-rest/src/test/java/org/apache/hadoop/hbase/rest/model/TestNamespacesInstanceModel.java
index fe371d5e359..0d4bbbdc7f5 100644
--- a/hbase-rest/src/test/java/org/apache/hadoop/hbase/rest/model/TestNamespacesInstanceModel.java
+++ b/hbase-rest/src/test/java/org/apache/hadoop/hbase/rest/model/TestNamespacesInstanceModel.java
@@ -24,7 +24,6 @@ import java.util.Map;
 
 import org.apache.hadoop.hbase.testclassification.RestTests;
 import org.apache.hadoop.hbase.testclassification.SmallTests;
-import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
 
@@ -95,4 +94,4 @@ public class TestNamespacesInstanceModel extends TestModelBase<NamespacesInstanc
   public void testFromPB() throws Exception {
     checkModel(fromPB(AS_PB));
   }
-}
\ No newline at end of file
+}
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.java
index 9b5bbfb4538..65b4efc123a 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.java
@@ -37,7 +37,6 @@ import org.apache.hadoop.hbase.HRegionLocation;
 import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.client.Admin;
 import org.apache.hadoop.hbase.client.Connection;
-import org.apache.hadoop.hbase.client.HTable;
 import org.apache.hadoop.hbase.client.RegionLocator;
 import org.apache.hadoop.hbase.client.Result;
 import org.apache.hadoop.hbase.client.Scan;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/SplitLogManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/SplitLogManager.java
index 1cdb7f39877..4c2e745a31b 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/SplitLogManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/SplitLogManager.java
@@ -64,7 +64,6 @@ import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
 import org.apache.hadoop.hbase.util.FSUtils;
 import org.apache.hadoop.hbase.util.Pair;
 import org.apache.hadoop.hbase.wal.DefaultWALProvider;
-import org.apache.hadoop.hbase.wal.WALFactory;
 
 import com.google.common.annotations.VisibleForTesting;
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/token/TokenUtil.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/token/TokenUtil.java
index 9fd68946793..68817bc5bfe 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/token/TokenUtil.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/token/TokenUtil.java
@@ -31,19 +31,16 @@ import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.classification.InterfaceStability;
 import org.apache.hadoop.hbase.client.Connection;
-import org.apache.hadoop.hbase.client.ConnectionFactory;
 import org.apache.hadoop.hbase.client.Table;
 import org.apache.hadoop.hbase.ipc.CoprocessorRpcChannel;
 import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
 import org.apache.hadoop.hbase.protobuf.generated.AuthenticationProtos;
 import org.apache.hadoop.hbase.security.User;
-import org.apache.hadoop.hbase.security.UserProvider;
 import org.apache.hadoop.hbase.zookeeper.ZKClusterId;
 import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.mapred.JobConf;
 import org.apache.hadoop.mapreduce.Job;
-import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.security.token.Token;
 import org.apache.zookeeper.KeeperException;
 
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestNamespace.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestNamespace.java
index f9e2a160c9a..d778fa9ce22 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestNamespace.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestNamespace.java
@@ -19,7 +19,6 @@
 package org.apache.hadoop.hbase;
 
 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;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestHTableMultiplexerFlushCache.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestHTableMultiplexerFlushCache.java
index 05c9caa71b1..9be6b6c688c 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestHTableMultiplexerFlushCache.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestHTableMultiplexerFlushCache.java
@@ -37,7 +37,6 @@ import org.junit.BeforeClass;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
 
-import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMobRestoreSnapshotFromClient.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMobRestoreSnapshotFromClient.java
index 0e2c23ce1f4..aa19e3ac00a 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMobRestoreSnapshotFromClient.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMobRestoreSnapshotFromClient.java
@@ -17,10 +17,6 @@
  */
 package org.apache.hadoop.hbase.client;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.fail;
-
 import java.io.IOException;
 
 import org.apache.commons.logging.Log;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMultiParallel.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMultiParallel.java
index d295ab24f3f..67ac51e85ae 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMultiParallel.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMultiParallel.java
@@ -51,7 +51,6 @@ import org.junit.AfterClass;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.BeforeClass;
-import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
 
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestMasterObserver.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestMasterObserver.java
index b2441010d36..7e79b64465f 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestMasterObserver.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestMasterObserver.java
@@ -47,7 +47,6 @@ import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.client.Admin;
 import org.apache.hadoop.hbase.client.Connection;
 import org.apache.hadoop.hbase.client.ConnectionFactory;
-import org.apache.hadoop.hbase.client.HTable;
 import org.apache.hadoop.hbase.client.RegionLocator;
 import org.apache.hadoop.hbase.client.Table;
 import org.apache.hadoop.hbase.master.AssignmentManager;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/TestHFileLink.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/TestHFileLink.java
index f2b26c1a5cc..3a9b3ca7fbe 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/TestHFileLink.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/TestHFileLink.java
@@ -32,7 +32,6 @@ import org.junit.experimental.categories.Category;
 import java.util.regex.Matcher;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
 /**
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/encoding/TestChangingEncoding.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/encoding/TestChangingEncoding.java
index 9665041955c..6359bef6170 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/encoding/TestChangingEncoding.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/encoding/TestChangingEncoding.java
@@ -31,7 +31,6 @@ import org.apache.hadoop.hbase.client.Connection;
 import org.apache.hadoop.hbase.client.ConnectionFactory;
 import org.apache.hadoop.hbase.client.Durability;
 import org.apache.hadoop.hbase.client.Get;
-import org.apache.hadoop.hbase.client.HBaseAdmin;
 import org.apache.hadoop.hbase.client.Put;
 import org.apache.hadoop.hbase.client.Result;
 import org.apache.hadoop.hbase.client.Table;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/mapred/TestTableInputFormat.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/mapred/TestTableInputFormat.java
index da322bc51d8..4b93843484a 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/mapred/TestTableInputFormat.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/mapred/TestTableInputFormat.java
@@ -48,7 +48,6 @@ import org.apache.hadoop.hbase.filter.CompareFilter.CompareOp;
 import org.apache.hadoop.hbase.filter.Filter;
 import org.apache.hadoop.hbase.filter.RegexStringComparator;
 import org.apache.hadoop.hbase.filter.RowFilter;
-import org.apache.hadoop.hbase.mapreduce.MapreduceTestingShim;
 import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
 import org.apache.hadoop.hbase.testclassification.LargeTests;
 import org.apache.hadoop.hbase.testclassification.MapReduceTests;
@@ -58,7 +57,6 @@ import org.apache.hadoop.mapred.InputFormat;
 import org.apache.hadoop.mapred.JobClient;
 import org.apache.hadoop.mapred.JobConf;
 import org.apache.hadoop.mapred.JobConfigurable;
-import org.apache.hadoop.mapred.MiniMRCluster;
 import org.apache.hadoop.mapred.OutputCollector;
 import org.apache.hadoop.mapred.Reporter;
 import org.apache.hadoop.mapred.RunningJob;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/mapreduce/TestHFileOutputFormat2.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/mapreduce/TestHFileOutputFormat2.java
index a57909b9237..f611be66e52 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/mapreduce/TestHFileOutputFormat2.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/mapreduce/TestHFileOutputFormat2.java
@@ -97,8 +97,6 @@ import org.junit.experimental.categories.Category;
 import org.junit.rules.TestRule;
 import org.mockito.Mockito;
 
-import com.google.common.collect.Lists;
-
 /**
  * Simple test for {@link CellSortReducer} and {@link HFileOutputFormat2}.
  * Sets up and runs a mapreduce job that writes hfile output.
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestBaseLoadBalancer.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestBaseLoadBalancer.java
index 45d9fe5a72f..d8c0a3dc92f 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestBaseLoadBalancer.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestBaseLoadBalancer.java
@@ -18,8 +18,6 @@
 package org.apache.hadoop.hbase.master.balancer;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotEquals;
-import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
@@ -498,4 +496,4 @@ public class TestBaseLoadBalancer extends BalancerTestBase {
     assertEquals(1, cluster.regionLocations[r43].length);
     assertEquals(-1, cluster.regionLocations[r43][0]);
   }
-}
\ No newline at end of file
+}
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestMasterProcedureEvents.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestMasterProcedureEvents.java
index af8d6baa2b6..edb1115f0d8 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestMasterProcedureEvents.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestMasterProcedureEvents.java
@@ -18,8 +18,6 @@
 
 package org.apache.hadoop.hbase.master.procedure;
 
-import java.io.IOException;
-
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
@@ -36,9 +34,7 @@ import org.apache.hadoop.hbase.procedure2.ProcedureTestingUtility;
 import org.apache.hadoop.hbase.regionserver.HRegionServer;
 import org.apache.hadoop.hbase.testclassification.MasterTests;
 import org.apache.hadoop.hbase.testclassification.MediumTests;
-import org.junit.After;
 import org.junit.AfterClass;
-import org.junit.Before;
 import org.junit.BeforeClass;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestMasterProcedureScheduler.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestMasterProcedureScheduler.java
index bb5fe6aeee1..12042d8cda8 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestMasterProcedureScheduler.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestMasterProcedureScheduler.java
@@ -20,13 +20,8 @@ package org.apache.hadoop.hbase.master.procedure;
 
 
 import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.util.Arrays;
 import java.util.ArrayList;
 import java.util.HashSet;
-import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 
@@ -49,7 +44,6 @@ import org.junit.experimental.categories.Category;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
 
 @Category({MasterTests.class, SmallTests.class})
 public class TestMasterProcedureScheduler {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestWALProcedureStoreOnHDFS.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestWALProcedureStoreOnHDFS.java
index 2e80b6931e8..17e9850e8b4 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestWALProcedureStoreOnHDFS.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestWALProcedureStoreOnHDFS.java
@@ -25,7 +25,6 @@ import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hbase.HBaseTestingUtility;
-import org.apache.hadoop.hbase.procedure2.Procedure;
 import org.apache.hadoop.hbase.procedure2.ProcedureTestingUtility;
 import org.apache.hadoop.hbase.procedure2.ProcedureTestingUtility.TestProcedure;
 import org.apache.hadoop.hbase.procedure2.store.ProcedureStore;
@@ -36,9 +35,6 @@ import org.apache.hadoop.hbase.util.Threads;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.apache.hadoop.hdfs.server.datanode.DataNode;
 
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
 
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/procedure/TestProcedureMember.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/procedure/TestProcedureMember.java
index 2d7a68fcce4..0d31108f34b 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/procedure/TestProcedureMember.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/procedure/TestProcedureMember.java
@@ -27,7 +27,6 @@ import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.reset;
 import static org.mockito.Mockito.spy;
-import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.verifyZeroInteractions;
 import static org.mockito.Mockito.when;
 
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/quotas/TestQuotaState.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/quotas/TestQuotaState.java
index da6010c8f5b..8e52e2f84f2 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/quotas/TestQuotaState.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/quotas/TestQuotaState.java
@@ -27,7 +27,6 @@ import org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.Throttle;
 import org.apache.hadoop.hbase.testclassification.SmallTests;
 import org.apache.hadoop.hbase.testclassification.RegionServerTests;
 
-import org.junit.Assert;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
 
@@ -227,4 +226,4 @@ public class TestQuotaState {
     assertTrue(limiter == NoopQuotaLimiter.get());
     assertNoThrottleException(limiter, 100);
   }
-}
\ No newline at end of file
+}
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactSplitThread.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactSplitThread.java
index f57ade97efd..3457883b6ab 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactSplitThread.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactSplitThread.java
@@ -22,8 +22,6 @@ import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.*;
 import org.apache.hadoop.hbase.client.*;
-import org.apache.hadoop.hbase.regionserver.throttle.CompactionThroughputControllerFactory;
-import org.apache.hadoop.hbase.regionserver.throttle.NoLimitThroughputController;
 import org.apache.hadoop.hbase.testclassification.MediumTests;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.junit.Assert;
@@ -31,7 +29,6 @@ import org.junit.Test;
 import org.junit.experimental.categories.Category;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
 
 @Category(MediumTests.class)
 public class TestCompactSplitThread {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestEndToEndSplitTransaction.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestEndToEndSplitTransaction.java
index 4c81b9acaef..1c1a6030e1c 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestEndToEndSplitTransaction.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestEndToEndSplitTransaction.java
@@ -47,7 +47,6 @@ import org.apache.hadoop.hbase.client.Admin;
 import org.apache.hadoop.hbase.client.Connection;
 import org.apache.hadoop.hbase.client.ConnectionFactory;
 import org.apache.hadoop.hbase.client.Get;
-import org.apache.hadoop.hbase.client.HTable;
 import org.apache.hadoop.hbase.client.Put;
 import org.apache.hadoop.hbase.client.RegionLocator;
 import org.apache.hadoop.hbase.client.Result;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestQueryMatcher.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestQueryMatcher.java
index a4bcdee283e..d8de178b9e4 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestQueryMatcher.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestQueryMatcher.java
@@ -27,9 +27,7 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.NavigableSet;
 
-import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.CellComparator;
-import org.apache.hadoop.hbase.HBaseConfiguration;
 import org.apache.hadoop.hbase.HBaseTestCase;
 import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.KeepDeletedCells;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestScannerRetriableFailure.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestScannerRetriableFailure.java
index e84ed593b6b..c89860c4997 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestScannerRetriableFailure.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestScannerRetriableFailure.java
@@ -51,9 +51,7 @@ import org.junit.Test;
 import org.junit.experimental.categories.Category;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
 
 @Category({RegionServerTests.class, LargeTests.class})
 public class TestScannerRetriableFailure {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestStoreFile.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestStoreFile.java
index e984c5d3e6d..829aa737913 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestStoreFile.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestStoreFile.java
@@ -71,7 +71,6 @@ import com.google.common.collect.Iterables;
 import com.google.common.collect.Lists;
 
 import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.when;
 
 /**
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/SequenceFileLogWriter.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/SequenceFileLogWriter.java
index 6ebafc91b24..39743d57fb1 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/SequenceFileLogWriter.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/SequenceFileLogWriter.java
@@ -34,7 +34,6 @@ import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hbase.HBaseInterfaceAudience;
 import org.apache.hadoop.hbase.util.FSUtils;
 import org.apache.hadoop.hbase.wal.WAL;
-import org.apache.hadoop.hbase.wal.WALProvider;
 import org.apache.hadoop.io.SequenceFile;
 import org.apache.hadoop.io.SequenceFile.CompressionType;
 import org.apache.hadoop.io.SequenceFile.Metadata;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestCustomWALCellCodec.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestCustomWALCellCodec.java
index 624f2c2c248..c3931531f80 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestCustomWALCellCodec.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestCustomWALCellCodec.java
@@ -18,7 +18,6 @@
 package org.apache.hadoop.hbase.regionserver.wal;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
 
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.testclassification.RegionServerTests;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRollPeriod.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRollPeriod.java
index f7e5ff7526f..1bf686fba22 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRollPeriod.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRollPeriod.java
@@ -17,7 +17,6 @@
  */
 package org.apache.hadoop.hbase.regionserver.wal;
 
-import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.assertFalse;
 
 import java.util.List;
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 081663d2db4..c096a9fd987 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
@@ -55,8 +55,6 @@ import org.apache.hadoop.hbase.ProcedureInfo;
 import org.apache.hadoop.hbase.ServerName;
 import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.TableNotFoundException;
-import org.apache.hadoop.hbase.Tag;
-import org.apache.hadoop.hbase.ArrayBackedTag;
 import org.apache.hadoop.hbase.client.Admin;
 import org.apache.hadoop.hbase.client.Append;
 import org.apache.hadoop.hbase.client.Connection;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/snapshot/MobSnapshotTestingUtils.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/snapshot/MobSnapshotTestingUtils.java
index 51b44ce62de..9026115d1ae 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/snapshot/MobSnapshotTestingUtils.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/snapshot/MobSnapshotTestingUtils.java
@@ -18,7 +18,6 @@
 package org.apache.hadoop.hbase.snapshot;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
 
 import java.io.IOException;
 import java.util.List;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/MultiThreadedAction.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/MultiThreadedAction.java
index 26f2db9e9a4..aaa92ff8311 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/MultiThreadedAction.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/MultiThreadedAction.java
@@ -34,7 +34,6 @@ import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.Cell;
 import org.apache.hadoop.hbase.CellUtil;
-import org.apache.hadoop.hbase.HBaseTestingUtility;
 import org.apache.hadoop.hbase.HRegionLocation;
 import org.apache.hadoop.hbase.RegionLocations;
 import org.apache.hadoop.hbase.TableName;
@@ -42,8 +41,6 @@ import org.apache.hadoop.hbase.client.ClusterConnection;
 import org.apache.hadoop.hbase.client.ConnectionFactory;
 import org.apache.hadoop.hbase.client.HConnection;
 import org.apache.hadoop.hbase.client.Result;
-import org.apache.hadoop.hbase.io.compress.Compression.Algorithm;
-import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;
 import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.MutationProto.MutationType;
 import org.apache.hadoop.hbase.util.test.LoadTestDataGenerator;
 import org.apache.hadoop.hbase.util.test.LoadTestKVGenerator;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/MultiThreadedUpdaterWithACL.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/MultiThreadedUpdaterWithACL.java
index 7529727d17e..756f6122744 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/MultiThreadedUpdaterWithACL.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/MultiThreadedUpdaterWithACL.java
@@ -31,7 +31,6 @@ import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.client.Append;
 import org.apache.hadoop.hbase.client.Delete;
 import org.apache.hadoop.hbase.client.Get;
-import org.apache.hadoop.hbase.client.HTable;
 import org.apache.hadoop.hbase.client.HTableInterface;
 import org.apache.hadoop.hbase.client.Increment;
 import org.apache.hadoop.hbase.client.Mutation;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestHBaseFsckTwoRS.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestHBaseFsckTwoRS.java
index f3f7e88ec00..48652175478 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestHBaseFsckTwoRS.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestHBaseFsckTwoRS.java
@@ -33,7 +33,6 @@ import org.apache.hadoop.hbase.ServerName;
 import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.client.ClusterConnection;
 import org.apache.hadoop.hbase.client.Durability;
-import org.apache.hadoop.hbase.client.HBaseAdmin;
 import org.apache.hadoop.hbase.client.HConnection;
 import org.apache.hadoop.hbase.client.Put;
 import org.apache.hadoop.hbase.client.Result;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/hbck/OfflineMetaRebuildTestCore.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/hbck/OfflineMetaRebuildTestCore.java
index e767f3ac9e7..97b6ddb61ee 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/hbck/OfflineMetaRebuildTestCore.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/hbck/OfflineMetaRebuildTestCore.java
@@ -42,7 +42,6 @@ import org.apache.hadoop.hbase.client.Admin;
 import org.apache.hadoop.hbase.client.Connection;
 import org.apache.hadoop.hbase.client.ConnectionFactory;
 import org.apache.hadoop.hbase.client.Delete;
-import org.apache.hadoop.hbase.client.HBaseAdmin;
 import org.apache.hadoop.hbase.client.Put;
 import org.apache.hadoop.hbase.client.RegionLocator;
 import org.apache.hadoop.hbase.client.Result;
diff --git a/hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftHttpServer.java b/hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftHttpServer.java
index 785d792df9f..0f49f560dec 100644
--- a/hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftHttpServer.java
+++ b/hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftHttpServer.java
@@ -40,7 +40,6 @@ import org.junit.BeforeClass;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
 import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
 import org.junit.Rule;
 import org.junit.rules.ExpectedException;