diff --git a/packages/swingset-runner/demo/exchangeBenchmark/vat-zoe.js b/packages/swingset-runner/demo/exchangeBenchmark/vat-zoe.js
index 3c06d9702447..2df07232cb1d 100644
--- a/packages/swingset-runner/demo/exchangeBenchmark/vat-zoe.js
+++ b/packages/swingset-runner/demo/exchangeBenchmark/vat-zoe.js
@@ -8,11 +8,9 @@ export function buildRootObject(vatPowers, vatParameters) {
   return Far('root', {
     buildZoe: vatAdminSvc => {
       const shutdownZoeVat = vatPowers.exitVatWithFailure;
-      const { zoeService: zoe } = makeZoeKit(
-        vatAdminSvc,
-        shutdownZoeVat,
-        vatParameters.zcfBundleName,
-      );
+      const { zoeService: zoe } = makeZoeKit(vatAdminSvc, shutdownZoeVat, {
+        name: vatParameters.zcfBundleName,
+      });
       return zoe;
     },
   });
diff --git a/packages/swingset-runner/demo/swapBenchmark/vat-zoe.js b/packages/swingset-runner/demo/swapBenchmark/vat-zoe.js
index 3c06d9702447..2df07232cb1d 100644
--- a/packages/swingset-runner/demo/swapBenchmark/vat-zoe.js
+++ b/packages/swingset-runner/demo/swapBenchmark/vat-zoe.js
@@ -8,11 +8,9 @@ export function buildRootObject(vatPowers, vatParameters) {
   return Far('root', {
     buildZoe: vatAdminSvc => {
       const shutdownZoeVat = vatPowers.exitVatWithFailure;
-      const { zoeService: zoe } = makeZoeKit(
-        vatAdminSvc,
-        shutdownZoeVat,
-        vatParameters.zcfBundleName,
-      );
+      const { zoeService: zoe } = makeZoeKit(vatAdminSvc, shutdownZoeVat, {
+        name: vatParameters.zcfBundleName,
+      });
       return zoe;
     },
   });
diff --git a/packages/swingset-runner/demo/zoeTests/vat-zoe.js b/packages/swingset-runner/demo/zoeTests/vat-zoe.js
index 3c06d9702447..2df07232cb1d 100644
--- a/packages/swingset-runner/demo/zoeTests/vat-zoe.js
+++ b/packages/swingset-runner/demo/zoeTests/vat-zoe.js
@@ -8,11 +8,9 @@ export function buildRootObject(vatPowers, vatParameters) {
   return Far('root', {
     buildZoe: vatAdminSvc => {
       const shutdownZoeVat = vatPowers.exitVatWithFailure;
-      const { zoeService: zoe } = makeZoeKit(
-        vatAdminSvc,
-        shutdownZoeVat,
-        vatParameters.zcfBundleName,
-      );
+      const { zoeService: zoe } = makeZoeKit(vatAdminSvc, shutdownZoeVat, {
+        name: vatParameters.zcfBundleName,
+      });
       return zoe;
     },
   });