diff --git a/preload-cards.js b/preload-cards.js
new file mode 100644
index 0000000..d6f63ce
--- /dev/null
+++ b/preload-cards.js
@@ -0,0 +1,6 @@
+// Part of testing for #64: could lazy loading of HA be the culprit?
+
+const preloadCard = type => window.loadCardHelpers()
+  .then(({ createCardElement }) => createCardElement({type}))
+
+preloadCard("custom:power-wheel-card");