diff --git a/contract/tools/e2e-tools.js b/contract/tools/e2e-tools.js
index c8c399c1..75b27511 100644
--- a/contract/tools/e2e-tools.js
+++ b/contract/tools/e2e-tools.js
@@ -205,8 +205,7 @@ export const provisionSmartWallet = async (
 
   /** @param {import('@agoric/smart-wallet/src/smartWallet.js').BridgeAction} bridgeAction */
   const sendAction = async bridgeAction => {
-    const capData = q.toCapData(harden(bridgeAction));
-    const offerBody = JSON.stringify(capData);
+    const offerBody = JSON.stringify(harden(bridgeAction));
     const txInfo = await agd.tx(
       ['swingset', 'wallet-action', offerBody, '--allow-spend'],
       { from: address, chainId, yes: true },