diff --git a/interface/resources/qml/hifi/commerce/marketplaceItemTester/MarketplaceItemTester.qml b/interface/resources/qml/hifi/commerce/marketplaceItemTester/MarketplaceItemTester.qml
index 559b6cb29c..f2dbcc3f80 100644
--- a/interface/resources/qml/hifi/commerce/marketplaceItemTester/MarketplaceItemTester.qml
+++ b/interface/resources/qml/hifi/commerce/marketplaceItemTester/MarketplaceItemTester.qml
@@ -29,10 +29,35 @@ Rectangle {
     signal sendToScript(var message)
 
     HifiStylesUit.HifiConstants { id: hifi }
-    ListModel { id: resourceListModel }
+    ListModel {
+        id: resourceListModel
+        property var nextId: 0
+    }
 
     color: hifi.colors.white
 
+    AnimatedImage {
+        id: spinner;
+        source: "spinner.gif"
+        width: 74;
+        height: width;
+        anchors.verticalCenter: parent.verticalCenter;
+        anchors.horizontalCenter: parent.horizontalCenter;
+    }
+
+    function fromScript(message) {
+        switch (message.method) {
+            case "newResourceObjectInTest":
+                var resourceObject = message.resourceObject;
+                resourceListModel.append(resourceObject);
+                spinner.visible = false;
+                break;
+            case "marketplaceTestBackendIsAlive":
+                spinner.visible = false;
+                break;
+        }
+    }
+
     function buildResourceObj(resource) {
         resource = resource.trim();
         var assetType = (resource.match(/\.app\.json$/) ? "application" :
@@ -40,14 +65,14 @@ Rectangle {
                          resource.match(/\.json\.gz$/) ? "content set" :
                          resource.match(/\.json$/) ? "entity or wearable" :
                          "unknown");
-        return { "resource": resource, "assetType": assetType };
+        return { "id": resourceListModel.nextId++,
+                 "resource": resource,
+                 "assetType": assetType };
     }
 
     function installResourceObj(resourceObj) {
         if ("application" == resourceObj["assetType"]) {
             Commerce.installApp(resourceObj["resource"]);
-        } else {
-            print("Cannot install resource object type " + resourceObj["assetType"]);
         }
     }
 
@@ -72,11 +97,6 @@ Rectangle {
             itemType: entityType});
     }
 
-    Component.onCompleted: {
-        // On startup, list includes all tester-installed assets.
-        addAllInstalledAppsToList();
-    }
-
     ListView {
         anchors.fill: parent
         anchors.leftMargin: 12
@@ -157,7 +177,13 @@ Rectangle {
                 currentIndex: ("entity or wearable" == assetType) ? model.indexOf("unknown") : model.indexOf(assetType)
 
                 Component.onCompleted: {
-                    onActivated.connect(function() { assetType = currentText; });
+                    onCurrentIndexChanged.connect(function() {
+                        assetType = model[currentIndex];
+                        sendToScript({
+                            method: 'tester_updateResourceObjectAssetType',
+                            objectId: resourceListModel.get(index)["id"],
+                            assetType: assetType });
+                    });
                 }
             }
 
@@ -220,17 +246,17 @@ Rectangle {
                 // ahead as though we are sure the present signal is one
                 // we expect.
                 if ("load file" == currentAction) {
-                    print("disconnecting load file");
                     Window.browseChanged.disconnect(onResourceSelected);
                 } else if ("load url" == currentAction) {
-                    print("disconnecting load url");
                     Window.promptTextChanged.disconnect(onResourceSelected);
                 }
                 if (resource) {
                     var resourceObj = buildResourceObj(resource);
                     installResourceObj(resourceObj);
-                    resourceListModel.append(resourceObj);
-                }
+                    sendToScript({
+                        method: 'tester_newResourceObject',
+                        resourceObject: resourceObj });
+                    }
             }
 
             Repeater {
diff --git a/interface/resources/qml/hifi/commerce/marketplaceItemTester/spinner.gif b/interface/resources/qml/hifi/commerce/marketplaceItemTester/spinner.gif
new file mode 100644
index 0000000000..00f75ae62f
Binary files /dev/null and b/interface/resources/qml/hifi/commerce/marketplaceItemTester/spinner.gif differ
diff --git a/scripts/system/marketplaces/marketplaces.js b/scripts/system/marketplaces/marketplaces.js
index 01c21044d2..a066143d45 100644
--- a/scripts/system/marketplaces/marketplaces.js
+++ b/scripts/system/marketplaces/marketplaces.js
@@ -800,6 +800,18 @@ var selectionDisplay = null; // for gridTool.js to ignore
         }, 150);
     }
 
+    function signalNewResourceObjectInTest(resourceObject) {
+        sendToQml({
+            method: "newResourceObjectInTest",
+            resourceObject: resourceObject });
+    }
+
+    var resourceObjectsInTest = [];
+    function storeResourceObjectInTest(resourceObject) {
+        resourceObjectsInTest.push(resourceObject);
+        signalNewResourceObjectInTest(resourceObject);
+    }
+
     // Function Name: fromQml()
     //
     // Description:
@@ -856,9 +868,22 @@ var selectionDisplay = null; // for gridTool.js to ignore
             case 'checkout_rezClicked':
             case 'purchases_rezClicked':
             case 'tester_rezClicked':
-                print("marketplace.js going to rez");
                 rezEntity(message.itemHref, message.itemType);
                 break;
+            case 'tester_newResourceObject':
+                storeResourceObjectInTest(message.resourceObject);
+                break;
+            case 'tester_updateResourceObjectAssetType':
+                var objectId = message.objectId;
+                for (var i = 0, size = resourceObjectsInTest.length; i < size; ++i) {
+                    if (i in resourceObjectsInTest &&
+                        objectId === resourceObjectsInTest[i]["id"]
+                    ) {
+                        resourceObjectsInTest[i]["assetType"] = message.assetType;
+                        break;
+                    }
+                }
+                break;
             case 'header_marketplaceImageClicked':
             case 'purchases_backClicked':
                 tablet.gotoWebScreen(message.referrerURL, MARKETPLACES_INJECT_SCRIPT_URL);
@@ -1027,6 +1052,22 @@ var selectionDisplay = null; // for gridTool.js to ignore
         }
     }
 
+    function pushResourceObjectsInTest() {
+        var isQmlSignaled = false;
+        for (var i = 0, size = resourceObjectsInTest.length; i < size; ++i) {
+            if (i in resourceObjectsInTest) {
+                signalNewResourceObjectInTest(resourceObjectsInTest[i]);
+                isQmlSignaled = true;
+            }
+        }
+        // Be sure that the QML has heard from us, at least so that it
+        // can indicate to the user that all of the resoruce objects in
+        // test have been transmitted to it.
+        if (!isQmlSignaled) {
+            sendToQml({ method: "marketplaceTestBackendIsAlive" });
+        }
+    }
+
     // Function Name: onTabletScreenChanged()
     //
     // Description:
@@ -1070,6 +1111,9 @@ var selectionDisplay = null; // for gridTool.js to ignore
             onMarketplaceItemTesterScreen);
 
         if (url === MARKETPLACE_PURCHASES_QML_PATH) {
+            // FIXME: There is a race condition here. The event bridge
+            // may not be up yet. Suggest Script.setTimeout(..., 750) to
+            // help avoid the condition.
             sendToQml({
                 method: 'updatePurchases',
                 referrerURL: referrerURL,
@@ -1103,6 +1147,12 @@ var selectionDisplay = null; // for gridTool.js to ignore
                 method: 'inspectionCertificate_resetCert'
             });
         }
+
+        if (onMarketplaceItemTesterScreen) {
+            // Why? The QML event bridge, wired above, needs time to
+            // come up.
+            Script.setTimeout(pushResourceObjectsInTest, 750);
+        }
     }
 
     //