diff --git a/.changeset/eleven-crabs-happen.md b/.changeset/eleven-crabs-happen.md
new file mode 100644
index 0000000000..f14d5c6b54
--- /dev/null
+++ b/.changeset/eleven-crabs-happen.md
@@ -0,0 +1,5 @@
+---
+"viem": patch
+---
+
+Added `testnet: true` to `btrTestnet`.