diff --git a/packages/unpublished-relationship-performance-test-app/app/routes/destroy.js b/packages/unpublished-relationship-performance-test-app/app/routes/destroy.js
index cc3509ad1a0..ebbc3f2472c 100644
--- a/packages/unpublished-relationship-performance-test-app/app/routes/destroy.js
+++ b/packages/unpublished-relationship-performance-test-app/app/routes/destroy.js
@@ -12,7 +12,7 @@ export default Route.extend({
     performance.mark('start-destroy-records');
     const children = await parent.children;
 
-    const childrenPromise = all(children.map((child) => child.destroyRecord()));
+    const childrenPromise = all(children.toArray().map((child) => child.destroyRecord()));
     const parentPromise = parent.destroyRecord();
 
     await all([childrenPromise, parentPromise]);
diff --git a/packages/unpublished-relationship-performance-test-app/app/routes/unload.js b/packages/unpublished-relationship-performance-test-app/app/routes/unload.js
index da8ab75815a..3b149a1e4ef 100644
--- a/packages/unpublished-relationship-performance-test-app/app/routes/unload.js
+++ b/packages/unpublished-relationship-performance-test-app/app/routes/unload.js
@@ -12,7 +12,7 @@ export default Route.extend({
 
     // runloop to ensure destroy does not escape bounds of the test
     run(() => {
-      children.forEach((child) => child.unloadRecord());
+      children.toArray().forEach((child) => child.unloadRecord());
     });
     performance.mark('end-unload-records');
   },