diff --git a/packages/taler-wallet-cli/src/integrationtests/helpers.ts b/packages/taler-wallet-cli/src/integrationtests/helpers.ts
index 215c0629f..1fdc36788 100644
--- a/packages/taler-wallet-cli/src/integrationtests/helpers.ts
+++ b/packages/taler-wallet-cli/src/integrationtests/helpers.ts
@@ -65,7 +65,7 @@ export interface SimpleTestEnvironment {
 export function getRandomIban(countryCode: string): string {
   return `${countryCode}715001051796${(Math.random() * 100000000)
     .toString()
-    .substring(0, 8)}`;
+    .substring(0, 6)}`;
 }
 
 export function getRandomString(): string {