diff --git a/common/predictive-text/unit_tests/headless/worker-dummy-integration.js b/common/predictive-text/unit_tests/headless/worker-dummy-integration.js
index bea5941d0e..6f6c34d860 100644
--- a/common/predictive-text/unit_tests/headless/worker-dummy-integration.js
+++ b/common/predictive-text/unit_tests/headless/worker-dummy-integration.js
@@ -14,6 +14,12 @@ describe('LMLayer using dummy model', function () {
     it('will predict future suggestions', function () {
       var lmLayer = new LMLayer(capabilities());
 
+      var stripIDs = function(suggestions) {
+        suggestions.forEach(function(suggestion) {
+          delete suggestion.id;
+        });
+      }
+
       // We're testing many as asynchronous messages in a row.
       // this would be cleaner using async/await syntax.
       // Not done yet, as this test case is a slightly-edited copy of the in-browser version.
@@ -25,15 +31,19 @@ describe('LMLayer using dummy model', function () {
       }).then(function () {
         return lmLayer.predict(zeroTransform(), emptyContext());
       }).then(function (suggestions) {
+        stripIDs(suggestions);
         assert.deepEqual(suggestions, iGotDistractedByHazel()[0]);
         return lmLayer.predict(zeroTransform(), emptyContext());
       }).then(function (suggestions) {
+        stripIDs(suggestions);
         assert.deepEqual(suggestions, iGotDistractedByHazel()[1]);
         return lmLayer.predict(zeroTransform(), emptyContext());
       }).then(function (suggestions) {
+        stripIDs(suggestions);
         assert.deepEqual(suggestions, iGotDistractedByHazel()[2]);
         return lmLayer.predict(zeroTransform(), emptyContext());
       }).then(function (suggestions) {
+        stripIDs(suggestions);
         assert.deepEqual(suggestions, iGotDistractedByHazel()[3]);
         lmLayer.shutdown();
         return Promise.resolve();
diff --git a/common/predictive-text/unit_tests/headless/worker-predict.js b/common/predictive-text/unit_tests/headless/worker-predict.js
index 8f935c7804..c9d7eb42d7 100644
--- a/common/predictive-text/unit_tests/headless/worker-predict.js
+++ b/common/predictive-text/unit_tests/headless/worker-predict.js
@@ -17,8 +17,20 @@ describe('LMLayerWorker', function () {
 
       // Initialize the worker with a model that will produce one suggestion.
       var fakePostMessage = sinon.fake();
+      var filteredFakePostMessage = function(event) {
+        if(event.message == 'suggestions') {
+          let suggestions = event.suggestions;
+
+          // Strip any IDs set by the model compositor.
+          suggestions.forEach(function(suggestion) {
+            delete suggestion.id;
+          });
+        }
+
+        fakePostMessage(event);
+      }
       var context = {
-        postMessage: fakePostMessage
+        postMessage: filteredFakePostMessage
       };
       context.importScripts = importScriptsWith(context);
 
diff --git a/common/predictive-text/unit_tests/in_browser/cases/worker-dummy-integration.js b/common/predictive-text/unit_tests/in_browser/cases/worker-dummy-integration.js
index 4702709d03..80f0f095f5 100644
--- a/common/predictive-text/unit_tests/in_browser/cases/worker-dummy-integration.js
+++ b/common/predictive-text/unit_tests/in_browser/cases/worker-dummy-integration.js
@@ -18,6 +18,12 @@ describe('LMLayer using dummy model', function () {
                                                   // the WebWorker boundary, so we should be generous here.
       var lmLayer = new LMLayer(helpers.defaultCapabilities);
 
+      var stripIDs = function(suggestions) {
+        suggestions.forEach(function(suggestion) {
+          delete suggestion.id;
+        });
+      }
+
       // We're testing many as asynchronous messages in a row.
       // this would be cleaner using async/await syntax, but
       // alas some of our browsers don't support it.
@@ -29,15 +35,19 @@ describe('LMLayer using dummy model', function () {
       }).then(function () {
         return lmLayer.predict(zeroTransform(), emptyContext());
       }).then(function (suggestions) {
+        stripIDs(suggestions);
         assert.deepEqual(suggestions, iGotDistractedByHazel()[0]);
         return lmLayer.predict(zeroTransform(), emptyContext());
       }).then(function (suggestions) {
+        stripIDs(suggestions);
         assert.deepEqual(suggestions, iGotDistractedByHazel()[1]);
         return lmLayer.predict(zeroTransform(), emptyContext());
       }).then(function (suggestions) {
+        stripIDs(suggestions);
         assert.deepEqual(suggestions, iGotDistractedByHazel()[2]);
         return lmLayer.predict(zeroTransform(), emptyContext());
       }).then(function (suggestions) {
+        stripIDs(suggestions);
         assert.deepEqual(suggestions, iGotDistractedByHazel()[3]);
         lmLayer.shutdown();
         return Promise.resolve();