diff --git a/.changeset/clean-pens-invite.md b/.changeset/clean-pens-invite.md
new file mode 100644
index 00000000000..f6166cbac03
--- /dev/null
+++ b/.changeset/clean-pens-invite.md
@@ -0,0 +1,5 @@
+---
+'@firebase/app-check': patch
+---
+
+Check for and initialize App Check debug mode during `initializeAppCheck()` instead of on import.