diff --git a/src/js/setupTests.ts b/src/js/setupTests.ts
new file mode 100644
index 000000000..f66299b97
--- /dev/null
+++ b/src/js/setupTests.ts
@@ -0,0 +1,4 @@
+import * as ResizeObserverModule from 'resize-observer-polyfill'
+import '@testing-library/jest-dom'
+
+(global as any).ResizeObserver = ResizeObserverModule.default