diff --git a/dubbo-common/src/test/java/com/alibaba/dubbo/common/utils/LogHelperTest.java b/dubbo-common/src/test/java/com/alibaba/dubbo/common/utils/LogHelperTest.java
new file mode 100644
index 00000000000..b3ba78321b2
--- /dev/null
+++ b/dubbo-common/src/test/java/com/alibaba/dubbo/common/utils/LogHelperTest.java
@@ -0,0 +1,93 @@
+/*
+ * 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 com.alibaba.dubbo.common.utils;
+
+import com.alibaba.dubbo.common.logger.Logger;
+import org.junit.Test;
+import org.mockito.Mockito;
+
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+public class LogHelperTest {
+
+    @Test
+    public void testTrace() throws Exception {
+        Logger logger = Mockito.mock(Logger.class);
+        when(logger.isTraceEnabled()).thenReturn(true);
+        LogHelper.trace(logger, "trace");
+        verify(logger).trace("trace");
+        Throwable t = new RuntimeException();
+        LogHelper.trace(logger, t);
+        verify(logger).trace(t);
+        LogHelper.trace(logger, "trace", t);
+        verify(logger).trace("trace", t);
+    }
+
+    @Test
+    public void testDebug() throws Exception {
+        Logger logger = Mockito.mock(Logger.class);
+        when(logger.isDebugEnabled()).thenReturn(true);
+        LogHelper.debug(logger, "debug");
+        verify(logger).debug("debug");
+        Throwable t = new RuntimeException();
+        LogHelper.debug(logger, t);
+        verify(logger).debug(t);
+        LogHelper.debug(logger, "debug", t);
+        verify(logger).debug("debug", t);
+    }
+
+    @Test
+    public void testInfo() throws Exception {
+        Logger logger = Mockito.mock(Logger.class);
+        when(logger.isInfoEnabled()).thenReturn(true);
+        LogHelper.info(logger, "info");
+        verify(logger).info("info");
+        Throwable t = new RuntimeException();
+        LogHelper.info(logger, t);
+        verify(logger).info(t);
+        LogHelper.info(logger, "info", t);
+        verify(logger).info("info", t);
+    }
+
+    @Test
+    public void testWarn() throws Exception {
+        Logger logger = Mockito.mock(Logger.class);
+        when(logger.isWarnEnabled()).thenReturn(true);
+        LogHelper.warn(logger, "warn");
+        verify(logger).warn("warn");
+        Throwable t = new RuntimeException();
+        LogHelper.warn(logger, t);
+        verify(logger).warn(t);
+        LogHelper.warn(logger, "warn", t);
+        verify(logger).warn("warn", t);
+    }
+
+    @Test
+    public void testError() throws Exception {
+        Logger logger = Mockito.mock(Logger.class);
+        when(logger.isErrorEnabled()).thenReturn(true);
+        LogHelper.error(logger, "error");
+        verify(logger).error("error");
+        Throwable t = new RuntimeException();
+        LogHelper.error(logger, t);
+        verify(logger).error(t);
+        LogHelper.error(logger, "error", t);
+        verify(logger).error("error", t);
+    }
+}
diff --git a/dubbo-common/src/test/java/com/alibaba/dubbo/common/utils/LogTest.java b/dubbo-common/src/test/java/com/alibaba/dubbo/common/utils/LogTest.java
new file mode 100644
index 00000000000..3901a93bafc
--- /dev/null
+++ b/dubbo-common/src/test/java/com/alibaba/dubbo/common/utils/LogTest.java
@@ -0,0 +1,56 @@
+/*
+ * 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 com.alibaba.dubbo.common.utils;
+
+import org.apache.log4j.Level;
+import org.junit.Test;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.is;
+import static org.junit.Assert.assertThat;
+
+public class LogTest {
+    @Test
+    public void testLogName() throws Exception {
+        Log log = new Log();
+        log.setLogName("log-name");
+        assertThat(log.getLogName(), equalTo("log-name"));
+    }
+
+    @Test
+    public void testLogLevel() throws Exception {
+        Log log = new Log();
+        log.setLogLevel(Level.ALL);
+        assertThat(log.getLogLevel(), is(Level.ALL));
+    }
+
+    @Test
+    public void testLogMessage() throws Exception {
+        Log log = new Log();
+        log.setLogMessage("log-message");
+        assertThat(log.getLogMessage(), equalTo("log-message"));
+    }
+
+    @Test
+    public void testLogThread() throws Exception {
+        Log log = new Log();
+        log.setLogThread("log-thread");
+        assertThat(log.getLogThread(), equalTo("log-thread"));
+    }
+
+}
diff --git a/dubbo-common/src/test/java/com/alibaba/dubbo/common/utils/LogUtilTest.java b/dubbo-common/src/test/java/com/alibaba/dubbo/common/utils/LogUtilTest.java
new file mode 100644
index 00000000000..a4f7b15ab96
--- /dev/null
+++ b/dubbo-common/src/test/java/com/alibaba/dubbo/common/utils/LogUtilTest.java
@@ -0,0 +1,113 @@
+/*
+ * 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 com.alibaba.dubbo.common.utils;
+
+import org.apache.log4j.Level;
+import org.junit.After;
+import org.junit.Test;
+
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.Matchers.is;
+import static org.junit.Assert.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+public class LogUtilTest {
+    @After
+    public void tearDown() throws Exception {
+        DubboAppender.logList.clear();
+    }
+
+    @Test
+    public void testStartStop() throws Exception {
+        LogUtil.start();
+        assertThat(DubboAppender.available, is(true));
+        LogUtil.stop();
+        assertThat(DubboAppender.available, is(false));
+    }
+
+    @Test
+    public void testCheckNoError() throws Exception {
+        Log log = mock(Log.class);
+        DubboAppender.logList.add(log);
+        when(log.getLogLevel()).thenReturn(Level.ERROR);
+        assertThat(LogUtil.checkNoError(), is(false));
+        when(log.getLogLevel()).thenReturn(Level.INFO);
+        assertThat(LogUtil.checkNoError(), is(true));
+    }
+
+    @Test
+    public void testFindName() throws Exception {
+        Log log = mock(Log.class);
+        DubboAppender.logList.add(log);
+        when(log.getLogName()).thenReturn("a");
+        assertThat(LogUtil.findName("a"), equalTo(1));
+    }
+
+    @Test
+    public void testFindLevel() throws Exception {
+        Log log = mock(Log.class);
+        DubboAppender.logList.add(log);
+        when(log.getLogLevel()).thenReturn(Level.ERROR);
+        assertThat(LogUtil.findLevel(Level.ERROR), equalTo(1));
+        assertThat(LogUtil.findLevel(Level.INFO), equalTo(0));
+    }
+
+    @Test
+    public void testFindLevelWithThreadName() throws Exception {
+        Log log = mock(Log.class);
+        DubboAppender.logList.add(log);
+        when(log.getLogLevel()).thenReturn(Level.ERROR);
+        when(log.getLogThread()).thenReturn("thread-1");
+        log = mock(Log.class);
+        DubboAppender.logList.add(log);
+        when(log.getLogLevel()).thenReturn(Level.ERROR);
+        when(log.getLogThread()).thenReturn("thread-2");
+        assertThat(LogUtil.findLevelWithThreadName(Level.ERROR, "thread-2"), equalTo(1));
+    }
+
+    @Test
+    public void testFindThread() throws Exception {
+        Log log = mock(Log.class);
+        DubboAppender.logList.add(log);
+        when(log.getLogThread()).thenReturn("thread-1");
+        assertThat(LogUtil.findThread("thread-1"), equalTo(1));
+    }
+
+    @Test
+    public void testFindMessage1() throws Exception {
+        Log log = mock(Log.class);
+        DubboAppender.logList.add(log);
+        when(log.getLogMessage()).thenReturn("message");
+        assertThat(LogUtil.findMessage("message"), equalTo(1));
+    }
+
+    @Test
+    public void testFindMessage2() throws Exception {
+        Log log = mock(Log.class);
+        DubboAppender.logList.add(log);
+        when(log.getLogMessage()).thenReturn("message");
+        when(log.getLogLevel()).thenReturn(Level.ERROR);
+        log = mock(Log.class);
+        DubboAppender.logList.add(log);
+        when(log.getLogMessage()).thenReturn("message");
+        when(log.getLogLevel()).thenReturn(Level.INFO);
+        assertThat(LogUtil.findMessage(Level.ERROR, "message"), equalTo(1));
+    }
+
+}