diff --git a/mapreduce/src/test/mapred/org/apache/hadoop/mapred/TestCombineOutputCollector.java b/mapreduce/src/test/mapred/org/apache/hadoop/mapred/TestCombineOutputCollector.java
new file mode 100644
index 0000000000..8141fe4420
--- /dev/null
+++ b/mapreduce/src/test/mapred/org/apache/hadoop/mapred/TestCombineOutputCollector.java
@@ -0,0 +1,77 @@
+/**
+ * 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 org.apache.hadoop.mapred;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.mapred.IFile.Writer;
+import org.apache.hadoop.mapred.Task.CombineOutputCollector;
+import org.apache.hadoop.mapred.Task.TaskReporter;
+import org.junit.Test;
+
+public class TestCombineOutputCollector {
+  private CombineOutputCollector<String, Integer> coc;
+
+  @Test
+  public void testCustomCollect() throws Throwable {
+    //mock creation
+    TaskReporter mockTaskReporter = mock(TaskReporter.class);
+    Counters.Counter outCounter = new Counters.Counter();
+    Writer<String, Integer> mockWriter = mock(Writer.class);
+
+    Configuration conf = new Configuration();
+    conf.set("mapred.combine.recordsBeforeProgress", "2");
+    
+    coc = new CombineOutputCollector<String, Integer>(outCounter, mockTaskReporter, conf);
+    coc.setWriter(mockWriter);
+    verify(mockTaskReporter, never()).progress();
+
+    coc.collect("dummy", 1);
+    verify(mockTaskReporter, never()).progress();
+    
+    coc.collect("dummy", 2);
+    verify(mockTaskReporter, times(1)).progress();
+  }
+  
+  @Test
+  public void testDefaultCollect() throws Throwable {
+    //mock creation
+    TaskReporter mockTaskReporter = mock(TaskReporter.class);
+    Counters.Counter outCounter = new Counters.Counter();
+    Writer<String, Integer> mockWriter = mock(Writer.class);
+
+    Configuration conf = new Configuration();
+    
+    coc = new CombineOutputCollector<String, Integer>(outCounter, mockTaskReporter, conf);
+    coc.setWriter(mockWriter);
+    verify(mockTaskReporter, never()).progress();
+
+    for(int i = 0; i < Task.DEFAULT_COMBINE_RECORDS_BEFORE_PROGRESS; i++) {
+    	coc.collect("dummy", i);
+    }
+    verify(mockTaskReporter, times(1)).progress();
+    for(int i = 0; i < Task.DEFAULT_COMBINE_RECORDS_BEFORE_PROGRESS; i++) {
+    	coc.collect("dummy", i);
+    }
+    verify(mockTaskReporter, times(2)).progress();
+  }
+}