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diff --git a/test/cpp/common/alarm_cpp_test.cc b/test/cpp/common/alarm_cpp_test.cc
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+++ b/test/cpp/common/alarm_cpp_test.cc
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+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc++/alarm.h>
+#include <grpc++/completion_queue.h>
+#include <grpc++/impl/codegen/completion_queue_tag.h>
+#include <gtest/gtest.h>
+
+#include "test/core/util/test_config.h"
+
+namespace grpc {
+namespace {
+
+class TestTag : public CompletionQueueTag {
+ public:
+  TestTag() : tag_(0) {}
+  TestTag(intptr_t tag) : tag_(tag) {}
+  bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE { return true; }
+  intptr_t tag() { return tag_; }
+
+ private:
+  intptr_t tag_;
+};
+
+TEST(AlarmTest, RegularExpiry) {
+  CompletionQueue cq;
+  TestTag input_tag(1618033);
+  Alarm alarm(&cq, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1), &input_tag);
+
+  TestTag* output_tag;
+  bool ok;
+  const CompletionQueue::NextStatus status = cq.AsyncNext(
+      (void**)&output_tag, &ok, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(2));
+
+  EXPECT_EQ(status, CompletionQueue::GOT_EVENT);
+  EXPECT_TRUE(ok);
+  EXPECT_EQ(output_tag->tag(), input_tag.tag());
+}
+
+TEST(AlarmTest, Cancellation) {
+  CompletionQueue cq;
+  TestTag input_tag(1618033);
+  Alarm alarm(&cq, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(2), &input_tag);
+  alarm.Cancel();
+
+  TestTag* output_tag;
+  bool ok;
+  const CompletionQueue::NextStatus status = cq.AsyncNext(
+      (void**)&output_tag, &ok, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1));
+
+  EXPECT_EQ(status, CompletionQueue::GOT_EVENT);
+  EXPECT_FALSE(ok);
+  EXPECT_EQ(output_tag->tag(), input_tag.tag());
+}
+
+}  // namespace
+}  // namespace grpc
+
+int main(int argc, char** argv) {
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}