diff --git a/a3p-integration/proposals/a:upgrade-next/core-eval-test-submission/README.md b/a3p-integration/proposals/a:upgrade-next/core-eval-test-submission/README.md
new file mode 100644
index 00000000000..dd60f098b11
--- /dev/null
+++ b/a3p-integration/proposals/a:upgrade-next/core-eval-test-submission/README.md
@@ -0,0 +1,6 @@
+These files enable a test of core-eval in an upgraded chain.
+
+send-script is a test submission, which is transmitted in ../core-eval.test.js.
+Some template values in the `.tjs` file are replaced before submitting the
+core-eval. The test then verifies that the core-eval written the expected
+values to vstorage.
diff --git a/a3p-integration/proposals/a:upgrade-next/core-eval-test-submission/send-script-permit.json b/a3p-integration/proposals/a:upgrade-next/core-eval-test-submission/send-script-permit.json
new file mode 100644
index 00000000000..27ba77ddaf6
--- /dev/null
+++ b/a3p-integration/proposals/a:upgrade-next/core-eval-test-submission/send-script-permit.json
@@ -0,0 +1 @@
+true
diff --git a/a3p-integration/proposals/a:upgrade-next/core-eval-test-submission/send-script.tjs b/a3p-integration/proposals/a:upgrade-next/core-eval-test-submission/send-script.tjs
new file mode 100644
index 00000000000..5ae5192335c
--- /dev/null
+++ b/a3p-integration/proposals/a:upgrade-next/core-eval-test-submission/send-script.tjs
@@ -0,0 +1,30 @@
+#! false node --ignore-this-line
+/* global E */
+
+/// <reference types="@agoric/vats/src/core/core-eval-env"/>
+/// <reference types="@agoric/vats/src/core/types-ambient"/>
+
+/**
+ * Write a value to chain storage
+ *
+ * see ../core-eval.test.js
+ *
+ * @param {BootstrapPowers} powers
+ */
+const writeIt = async powers => {
+  const nodePath = '{{NODE_PATH}}';
+  const nodeValue = '{{NODE_VALUE}}';
+  const {
+    consume: { chainStorage },
+  } = powers;
+
+  let node = chainStorage;
+
+  for (const nodeName of nodePath.split('.')) {
+    node = E(node).makeChildNode(nodeName);
+  }
+
+  await E(node).setValue(nodeValue);
+};
+
+writeIt;
diff --git a/a3p-integration/proposals/a:upgrade-next/core-eval.test.js b/a3p-integration/proposals/a:upgrade-next/core-eval.test.js
new file mode 100644
index 00000000000..ab94ec5ac3f
--- /dev/null
+++ b/a3p-integration/proposals/a:upgrade-next/core-eval.test.js
@@ -0,0 +1,52 @@
+/* eslint-disable @jessie.js/safe-await-separator */
+import test from 'ava';
+import { readFile, writeFile } from 'node:fs/promises';
+
+import { agd, evalBundles, waitForBlock } from '@agoric/synthetic-chain';
+
+const SUBMISSION_DIR = 'core-eval-test-submission';
+
+/**
+ * @param {string} fileName base file name without .tjs extension
+ * @param {Record<string, string>} replacements
+ */
+const replaceTemplateValuesInFile = async (fileName, replacements) => {
+  let script = await readFile(`${fileName}.tjs`, 'utf-8');
+  for (const [template, value] of Object.entries(replacements)) {
+    script = script.replaceAll(`{{${template}}}`, value);
+  }
+  await writeFile(`${fileName}.js`, script);
+};
+
+const readPublished = async path => {
+  const { value } = await agd.query(
+    'vstorage',
+    'data',
+    '--output',
+    'json',
+    `published.${path}`,
+  );
+  if (value === '') {
+    return undefined;
+  }
+  const obj = JSON.parse(value);
+  return obj.values[0];
+};
+
+test(`core eval works`, async t => {
+  const nodePath = 'foo.bar';
+  const nodeValue = 'baz';
+
+  t.falsy(await readPublished(nodePath));
+
+  await replaceTemplateValuesInFile(`${SUBMISSION_DIR}/send-script`, {
+    NODE_PATH: nodePath,
+    NODE_VALUE: nodeValue,
+  });
+
+  await evalBundles(SUBMISSION_DIR);
+
+  await waitForBlock(2); // enough time for core eval to execute ?
+
+  t.is(await readPublished(nodePath), nodeValue);
+});
diff --git a/a3p-integration/proposals/a:upgrade-next/package.json b/a3p-integration/proposals/a:upgrade-next/package.json
index 88cdbd9a141..b25466ff0db 100644
--- a/a3p-integration/proposals/a:upgrade-next/package.json
+++ b/a3p-integration/proposals/a:upgrade-next/package.json
@@ -13,7 +13,7 @@
   "type": "module",
   "license": "Apache-2.0",
   "dependencies": {
-    "@agoric/synthetic-chain": "^0.0.6-4",
+    "@agoric/synthetic-chain": "^0.0.7-1",
     "ava": "^5.3.1"
   },
   "scripts": {
diff --git a/a3p-integration/proposals/a:upgrade-next/tsconfig.json b/a3p-integration/proposals/a:upgrade-next/tsconfig.json
new file mode 100644
index 00000000000..98fa6f26c3b
--- /dev/null
+++ b/a3p-integration/proposals/a:upgrade-next/tsconfig.json
@@ -0,0 +1,12 @@
+{
+  "compilerOptions": {
+    "target": "esnext",
+    "module": "esnext",
+    "moduleResolution": "node",
+    "allowJs": true,
+    "checkJs": true,
+    "strict": false,
+    "strictNullChecks": true,
+    "noImplicitThis": true
+  }
+}
diff --git a/a3p-integration/proposals/a:upgrade-next/yarn.lock b/a3p-integration/proposals/a:upgrade-next/yarn.lock
index fa80388d723..d20dc303d87 100644
--- a/a3p-integration/proposals/a:upgrade-next/yarn.lock
+++ b/a3p-integration/proposals/a:upgrade-next/yarn.lock
@@ -5,9 +5,9 @@ __metadata:
   version: 8
   cacheKey: 10c0
 
-"@agoric/synthetic-chain@npm:^0.0.6-4":
-  version: 0.0.6-4
-  resolution: "@agoric/synthetic-chain@npm:0.0.6-4"
+"@agoric/synthetic-chain@npm:^0.0.7-1":
+  version: 0.0.7-1
+  resolution: "@agoric/synthetic-chain@npm:0.0.7-1"
   dependencies:
     "@endo/zip": "npm:^1.0.1"
     better-sqlite3: "npm:^9.4.0"
@@ -15,7 +15,7 @@ __metadata:
     execa: "npm:^8.0.1"
   bin:
     synthetic-chain: dist/cli/cli.js
-  checksum: 10c0/0c8512eaedf05aa51a10e28c4db0970af1622cf70c0e51fa08768170f73326621125960fb5d8f300613203cdf1cf5ebb2950e6e691bb7204675c9062ff78293f
+  checksum: 10c0/dc30624063c619a5a7deb2e5a0a2ded19a03aad99465b3f5ffa8cf8a719ac99da3b4e3c4a42d65c69904a84a4aa9cebde3f33abcee7f5ddb88e469a1c55a997c
   languageName: node
   linkType: hard
 
@@ -1820,7 +1820,7 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "root-workspace-0b6124@workspace:."
   dependencies:
-    "@agoric/synthetic-chain": "npm:^0.0.6-4"
+    "@agoric/synthetic-chain": "npm:^0.0.7-1"
     ava: "npm:^5.3.1"
   languageName: unknown
   linkType: soft