diff --git a/OneSignalSDK/onesignal/src/main/java/com/onesignal/OSInAppMessage.java b/OneSignalSDK/onesignal/src/main/java/com/onesignal/OSInAppMessage.java
index c2f3d6ffa3..d7d0d0d13a 100644
--- a/OneSignalSDK/onesignal/src/main/java/com/onesignal/OSInAppMessage.java
+++ b/OneSignalSDK/onesignal/src/main/java/com/onesignal/OSInAppMessage.java
@@ -29,8 +29,13 @@
 
 import androidx.annotation.NonNull;
 
+import org.json.JSONException;
+import org.json.JSONObject;
+
 public class OSInAppMessage {
 
+    public static final String IAM_ID = "messageId";
+
     /**
      * The unique identifier for this in-app message
      */
@@ -46,4 +51,16 @@ public String getMessageId() {
         return messageId;
     }
 
+    public JSONObject toJSONObject() {
+        JSONObject mainObj = new JSONObject();
+        try {
+            mainObj.put(IAM_ID, messageId);
+        }
+        catch(JSONException e) {
+            e.printStackTrace();
+        }
+
+        return mainObj;
+    }
+
 }
diff --git a/OneSignalSDK/onesignal/src/main/java/com/onesignal/OSInAppMessageInternal.java b/OneSignalSDK/onesignal/src/main/java/com/onesignal/OSInAppMessageInternal.java
index 0d18e58653..9dcb468b3c 100644
--- a/OneSignalSDK/onesignal/src/main/java/com/onesignal/OSInAppMessageInternal.java
+++ b/OneSignalSDK/onesignal/src/main/java/com/onesignal/OSInAppMessageInternal.java
@@ -17,7 +17,9 @@
 
 class OSInAppMessageInternal extends OSInAppMessage {
 
-    private static final String IAM_ID = "id";
+    // "id" is expected instead of "messageId" when parsing JSON from the backend
+    private static final String ID = "id";
+    private static final String IAM_ID = "messageId";
     private static final String IAM_VARIANTS = "variants";
     private static final String IAM_TRIGGERS = "triggers";
     private static final String IAM_REDISPLAY_STATS = "redisplay";
@@ -74,7 +76,8 @@ class OSInAppMessageInternal extends OSInAppMessage {
 
     OSInAppMessageInternal(JSONObject json) throws JSONException {
         // initialize simple root properties
-        super(json.getString(IAM_ID));
+        // "id" is expected instead of "messageId" when parsing JSON from the backend
+        super(json.getString(ID));
         this.variants = parseVariants(json.getJSONObject(IAM_VARIANTS));
         this.triggers = parseTriggerJson(json.getJSONArray(IAM_TRIGGERS));
         this.clickedClickIds = new HashSet<>();
@@ -145,7 +148,8 @@ protected ArrayList<ArrayList<OSTrigger>> parseTriggerJson(JSONArray triggersJso
         return parsedTriggers;
     }
 
-    JSONObject toJSONObject() {
+    @Override
+    public JSONObject toJSONObject() {
         JSONObject json = new JSONObject();
 
         try {
diff --git a/OneSignalSDK/unittest/src/test/java/com/onesignal/InAppMessagingHelpers.java b/OneSignalSDK/unittest/src/test/java/com/onesignal/InAppMessagingHelpers.java
index 9e3fc57f27..74a14e922c 100644
--- a/OneSignalSDK/unittest/src/test/java/com/onesignal/InAppMessagingHelpers.java
+++ b/OneSignalSDK/unittest/src/test/java/com/onesignal/InAppMessagingHelpers.java
@@ -19,6 +19,20 @@ public class InAppMessagingHelpers {
     public static final String IAM_PAGE_ID = "12345678-1234-ABCD-1234-123456789012";
     public static final String IAM_HAS_LIQUID = "has_liquid";
 
+    // unit tests will create an IAM based off JSON of another IAM
+    // toJSONObject uses key of "messageId" so we need to replace that with "id" for creating IAM
+    public static JSONObject convertIAMtoJSONObject(OSInAppMessageInternal inAppMessage) {
+        JSONObject json = inAppMessage.toJSONObject();
+        try {
+            json.put("id", json.get("messageId"));
+            json.remove("messageId");
+        } catch (JSONException e) {
+            e.printStackTrace();
+        }
+
+        return json;
+    }
+
     public static boolean evaluateMessage(OSInAppMessageInternal message) {
         return OneSignal.getInAppMessageController().triggerController.evaluateMessageTriggers(message);
     }
diff --git a/OneSignalSDK/unittest/src/test/java/com/onesignal/OneSignalPackagePrivateHelper.java b/OneSignalSDK/unittest/src/test/java/com/onesignal/OneSignalPackagePrivateHelper.java
index 810e456000..74d5f889c8 100644
--- a/OneSignalSDK/unittest/src/test/java/com/onesignal/OneSignalPackagePrivateHelper.java
+++ b/OneSignalSDK/unittest/src/test/java/com/onesignal/OneSignalPackagePrivateHelper.java
@@ -358,10 +358,6 @@ public OSTestInAppMessageInternal(@NonNull String messageId, int displaysQuantit
          super(json);
       }
 
-      OSTestInAppMessageInternal(OSInAppMessageInternal inAppMessage) throws JSONException {
-         super(inAppMessage.toJSONObject());
-      }
-
       public void setMessageId(String messageId) {
          this.messageId = messageId;
       }
@@ -586,7 +582,8 @@ public static List<OSTestInAppMessageInternal> getRedisplayInAppMessages() {
 
       for (OSInAppMessageInternal message : messages) {
          try {
-            OSTestInAppMessageInternal testInAppMessage = new OSTestInAppMessageInternal(message);
+            JSONObject json = InAppMessagingHelpers.convertIAMtoJSONObject(message);
+            OSTestInAppMessageInternal testInAppMessage = new OSTestInAppMessageInternal(json);
             testInAppMessage.getRedisplayStats().setDisplayStats(message.getRedisplayStats());
             testMessages.add(testInAppMessage);
 
diff --git a/OneSignalSDK/unittest/src/test/java/com/test/onesignal/InAppMessageIntegrationTests.java b/OneSignalSDK/unittest/src/test/java/com/test/onesignal/InAppMessageIntegrationTests.java
index 2d6a0c947d..6c16cf91d5 100644
--- a/OneSignalSDK/unittest/src/test/java/com/test/onesignal/InAppMessageIntegrationTests.java
+++ b/OneSignalSDK/unittest/src/test/java/com/test/onesignal/InAppMessageIntegrationTests.java
@@ -1907,11 +1907,32 @@ public void testLiquidIAMDisplayWaitsForGetTags() throws Exception {
         assertEquals("in_app_messages/" + message.getMessageId() + "/impression", lastRequest.url);
     }
 
+    // Test toJSONObject() method currently only checks JSON for "messageId"
+    @Test
+    public void testInAppMessageInternalToJSONObject_messageId() throws Exception {
+        // 1. Create a basic test IAM
+        OSTestInAppMessageInternal iam = InAppMessagingHelpers.buildTestMessage(null);
+
+        // 2. Set a message ID for the IAM
+        String messageId = new String(new char[64]).replace('\0', '0');
+        iam.setMessageId(messageId);
+
+        // 3. Init
+        OneSignalInit();
+        threadAndTaskWait();
+
+        // 4. call toJSONObject() on IAM
+        JSONObject testJsonObj = iam.toJSONObject();
+
+        // 5. Check "messageId" in JSON Object
+        assertEquals(messageId, testJsonObj.optString("messageId"));
+    }
+
     private void setMockRegistrationResponseWithMessages(ArrayList<OSTestInAppMessageInternal> messages) throws JSONException {
         final JSONArray jsonMessages = new JSONArray();
 
         for (OSTestInAppMessageInternal message : messages)
-            jsonMessages.put(message.toJSONObject());
+            jsonMessages.put(InAppMessagingHelpers.convertIAMtoJSONObject(message));
 
         ShadowOneSignalRestClient.setNextSuccessfulRegistrationResponse(new JSONObject() {{
             put("id", "df8f05be55ba-b2f7f966-d8cc-11e4-bed1");