diff --git a/a3p-integration/proposals/a:upgrade-next/package.json b/a3p-integration/proposals/a:upgrade-next/package.json
index 59c71cdf0d5..e84359bd07e 100644
--- a/a3p-integration/proposals/a:upgrade-next/package.json
+++ b/a3p-integration/proposals/a:upgrade-next/package.json
@@ -3,7 +3,11 @@
     "releaseNotes": "TBD",
     "sdkImageTag": "latest",
     "planName": "UNRELEASED_UPGRADE",
-    "upgradeInfo": {},
+    "upgradeInfo": {
+      "coreProposals": [
+        "@agoric/builders/scripts/vats/init-network.js"
+      ]
+    },
     "type": "Software Upgrade Proposal"
   },
   "type": "module",
diff --git a/a3p-integration/proposals/a:upgrade-next/post.test.js b/a3p-integration/proposals/a:upgrade-next/post.test.js
new file mode 100644
index 00000000000..5508f3e70da
--- /dev/null
+++ b/a3p-integration/proposals/a:upgrade-next/post.test.js
@@ -0,0 +1,8 @@
+import test from 'ava';
+
+import { getIncarnation } from '@agoric/synthetic-chain/src/lib/vat-status.js';
+
+test(`Ensure Network Vat was installed`, async t => {
+  const incarnation = await getIncarnation('network');
+  t.is(incarnation, 0);
+});