diff --git a/packages/boot/test/bootstrapTests/price-feed-replace.test.ts b/packages/boot/test/bootstrapTests/price-feed-replace.test.ts
index 84a077f336ec..a9c0ce6e177b 100644
--- a/packages/boot/test/bootstrapTests/price-feed-replace.test.ts
+++ b/packages/boot/test/bootstrapTests/price-feed-replace.test.ts
@@ -101,7 +101,7 @@ test.serial('setupVaults; run updatePriceFeeds proposals', async t => {
 
   t.log('building all relevant CoreEvals');
   const coreEvals = await Promise.all([
-    buildProposal(priceFeedBuilder, ['main']),
+    buildProposal(priceFeedBuilder, ['MAINNET']),
     buildProposal('@agoric/builders/scripts/vats/upgradeVaults.js'),
     buildProposal('@agoric/builders/scripts/vats/add-auction.js'),
   ]);
diff --git a/packages/boot/test/bootstrapTests/updateGovernedParams.test.ts b/packages/boot/test/bootstrapTests/updateGovernedParams.test.ts
index f38d83bc5e7b..5410fcc59d78 100644
--- a/packages/boot/test/bootstrapTests/updateGovernedParams.test.ts
+++ b/packages/boot/test/bootstrapTests/updateGovernedParams.test.ts
@@ -134,7 +134,7 @@ test('modify manager & director params; update vats, check', async t => {
   const priceFeedBuilder =
     '@agoric/builders/scripts/inter-protocol/updatePriceFeeds.js';
   const coreEvals = await Promise.all([
-    buildProposal(priceFeedBuilder, ['main']),
+    buildProposal(priceFeedBuilder, ['MAINNET']),
     buildProposal('@agoric/builders/scripts/vats/upgradeVaults.js'),
     buildProposal('@agoric/builders/scripts/vats/add-auction.js'),
   ]);