diff --git a/.changeset/chilled-hounds-double.md b/.changeset/chilled-hounds-double.md
new file mode 100644
index 000000000..7908c2445
--- /dev/null
+++ b/.changeset/chilled-hounds-double.md
@@ -0,0 +1,5 @@
+---
+"@usedapp/testing": patch
+---
+
+Change chainId in mockConnector
diff --git a/packages/testing/src/mockConnector.ts b/packages/testing/src/mockConnector.ts
index f8b0db303..57698101d 100644
--- a/packages/testing/src/mockConnector.ts
+++ b/packages/testing/src/mockConnector.ts
@@ -5,7 +5,7 @@ import { MockProvider } from '@ethereum-waffle/provider'
 // Modified from https://github.com/NoahZinsmeister/web3-react/blob/v6/packages/network-connector/src/index.ts
 export class MockConnector extends AbstractConnector {
   private provider: any
-  private chainId = 469
+  private chainId = 1337
 
   constructor(provider?: any) {
     super()