diff --git a/tests/msgq/1.0/ITestMsgQ.hal b/tests/msgq/1.0/ITestMsgQ.hal
index 112270a..bd10237 100644
--- a/tests/msgq/1.0/ITestMsgQ.hal
+++ b/tests/msgq/1.0/ITestMsgQ.hal
@@ -31,7 +31,7 @@
      *
      * @return ret True if the setup is successful.
      */
-    configureFmqSyncReadWrite(fmq_sync<uint16_t> mqDesc) generates(bool ret);
+    configureFmqSyncReadWrite(fmq_sync<int32_t> mqDesc) generates(bool ret);
 
     /**
      * This method requests the service to return an MQDescriptor to
@@ -46,7 +46,7 @@
      * @return mqDesc This structure describes the unsynchronized FMQ that was
      * set up by the service. Client can use it to set up the FMQ at its end.
      */
-    getFmqUnsyncWrite(bool configureFmq) generates(bool ret, fmq_unsync<uint16_t> mqDesc);
+    getFmqUnsyncWrite(bool configureFmq) generates(bool ret, fmq_unsync<int32_t> mqDesc);
 
     /**
      * This method request the service to write into the synchronized read/write
diff --git a/tests/msgq/1.0/default/TestMsgQ.cpp b/tests/msgq/1.0/default/TestMsgQ.cpp
index ba665c9..4473737 100644
--- a/tests/msgq/1.0/default/TestMsgQ.cpp
+++ b/tests/msgq/1.0/default/TestMsgQ.cpp
@@ -25,7 +25,7 @@
 
 // Methods from ::android::hardware::tests::msgq::V1_0::ITestMsgQ follow.
 Return<bool> TestMsgQ::configureFmqSyncReadWrite(
-    const android::hardware::MQDescriptorSync<uint16_t>& mqDesc) {
+        const android::hardware::MQDescriptorSync<int32_t>& mqDesc) {
     mFmqSynchronized.reset(new (std::nothrow) MessageQueueSync(mqDesc));
     if ((mFmqSynchronized == nullptr) || (mFmqSynchronized->isValid() == false)) {
         return false;
@@ -56,7 +56,7 @@
 }
 
 Return<bool> TestMsgQ::requestWriteFmqSync(int32_t count) {
-    std::vector<uint16_t> data(count);
+    std::vector<int32_t> data(count);
     for (int i = 0; i < count; i++) {
         data[i] = i;
     }
@@ -65,14 +65,14 @@
 }
 
 Return<bool> TestMsgQ::requestReadFmqSync(int32_t count) {
-    std::vector<uint16_t> data(count);
+    std::vector<int32_t> data(count);
     bool result = mFmqSynchronized->read(&data[0], count)
             && verifyData(&data[0], count);
     return result;
 }
 
 Return<bool> TestMsgQ::requestWriteFmqUnsync(int32_t count) {
-    std::vector<uint16_t> data(count);
+    std::vector<int32_t> data(count);
     for (int i = 0; i < count; i++) {
         data[i] = i;
     }
@@ -81,14 +81,14 @@
 }
 
 Return<bool> TestMsgQ::requestReadFmqUnsync(int32_t count) {
-    std::vector<uint16_t> data(count);
+    std::vector<int32_t> data(count);
     bool result =
             mFmqUnsynchronized->read(&data[0], count) && verifyData(&data[0], count);
     return result;
 }
 
 Return<void> TestMsgQ::requestBlockingRead(int32_t count) {
-    std::vector<uint16_t> data(count);
+    std::vector<int32_t> data(count);
     bool result = mFmqSynchronized->readBlocking(
             &data[0],
             count,
@@ -103,7 +103,7 @@
 }
 
 Return<void> TestMsgQ::requestBlockingReadDefaultEventFlagBits(int32_t count) {
-    std::vector<uint16_t> data(count);
+    std::vector<int32_t> data(count);
     bool result = mFmqSynchronized->readBlocking(
             &data[0],
             count);
@@ -116,7 +116,7 @@
 }
 
 Return<void> TestMsgQ::requestBlockingReadRepeat(int32_t count, int32_t numIter) {
-    std::vector<uint16_t> data(count);
+    std::vector<int32_t> data(count);
     for (int i = 0; i < numIter; i++) {
         bool result = mFmqSynchronized->readBlocking(
                 &data[0],
diff --git a/tests/msgq/1.0/default/TestMsgQ.h b/tests/msgq/1.0/default/TestMsgQ.h
index f9fcddd..8a204b7 100644
--- a/tests/msgq/1.0/default/TestMsgQ.h
+++ b/tests/msgq/1.0/default/TestMsgQ.h
@@ -49,13 +49,13 @@
 using android::hardware::MessageQueue;
 
 struct TestMsgQ : public ITestMsgQ {
-    typedef MessageQueue<uint16_t, kSynchronizedReadWrite> MessageQueueSync;
-    typedef MessageQueue<uint16_t, kUnsynchronizedWrite> MessageQueueUnsync;
+    typedef MessageQueue<int32_t, kSynchronizedReadWrite> MessageQueueSync;
+    typedef MessageQueue<int32_t, kUnsynchronizedWrite> MessageQueueUnsync;
 
     TestMsgQ() : mFmqSynchronized(nullptr), mFmqUnsynchronized(nullptr) {}
 
     // Methods from ::android::hardware::tests::msgq::V1_0::ITestMsgQ follow.
-    Return<bool> configureFmqSyncReadWrite(const MQDescriptorSync<uint16_t>& mqDesc) override;
+    Return<bool> configureFmqSyncReadWrite(const MQDescriptorSync<int32_t>& mqDesc) override;
     Return<void> getFmqUnsyncWrite(bool configureFmq, getFmqUnsyncWrite_cb _hidl_cb) override;
     Return<bool> requestWriteFmqSync(int32_t count) override;
     Return<bool> requestReadFmqSync(int32_t count) override;
@@ -73,7 +73,7 @@
     /*
      * Utility function to verify data read from the fast message queue.
      */
-    bool verifyData(uint16_t* data, int count) {
+    bool verifyData(int32_t* data, int count) {
         for (int i = 0; i < count; i++) {
             if (data[i] != i) return false;
         }