diff --git a/a3p-integration/.yarn/patches/@agoric-synthetic-chain-npm-0.1.0-148de716a6.patch b/a3p-integration/.yarn/patches/@agoric-synthetic-chain-npm-0.1.0-148de716a6.patch
new file mode 100644
index 00000000000..3d01386399d
--- /dev/null
+++ b/a3p-integration/.yarn/patches/@agoric-synthetic-chain-npm-0.1.0-148de716a6.patch
@@ -0,0 +1,13 @@
+diff --git a/dist/upgrade-test-scripts/env_setup.sh b/dist/upgrade-test-scripts/env_setup.sh
+index 617a0fbe7efdfa457e28fc52806dba1b323930d8..25f52a6cf133dca830bd0dcd47c91700e6a8effe 100755
+--- a/dist/upgrade-test-scripts/env_setup.sh
++++ b/dist/upgrade-test-scripts/env_setup.sh
+@@ -100,7 +100,7 @@ killAgd() {
+   AGD_PID=$(cat $HOME/.agoric/agd.pid)
+   kill $AGD_PID
+   rm $HOME/.agoric/agd.pid
+-  wait $AGD_PID || true
++  tail --pid=$AGD_PID -f /dev/null || true
+ }
+ 
+ provisionSmartWallet() {
diff --git a/a3p-integration/package.json b/a3p-integration/package.json
index 37d3501a5e4..2872b5eac7e 100644
--- a/a3p-integration/package.json
+++ b/a3p-integration/package.json
@@ -12,7 +12,7 @@
     "doctor": "yarn synthetic-chain doctor"
   },
   "dependencies": {
-    "@agoric/synthetic-chain": "^0.1.0",
+    "@agoric/synthetic-chain": "patch:@agoric/synthetic-chain@npm%3A0.1.0#~/.yarn/patches/@agoric-synthetic-chain-npm-0.1.0-148de716a6.patch",
     "@types/better-sqlite3": "^7.6.9"
   },
   "packageManager": "yarn@4.2.2",
diff --git a/a3p-integration/proposals/z:acceptance/state-sync-snapshots-test.sh b/a3p-integration/proposals/z:acceptance/state-sync-snapshots-test.sh
new file mode 100755
index 00000000000..f4dcf018e97
--- /dev/null
+++ b/a3p-integration/proposals/z:acceptance/state-sync-snapshots-test.sh
@@ -0,0 +1,14 @@
+#!/bin/bash
+
+source /usr/src/upgrade-test-scripts/env_setup.sh
+
+set -e
+
+killAgd
+agd snapshots export
+SNAPSHOT_DETAILS=$(agd snapshots list | head -n1 | sed -E 's/height: ([0-9]+) format: ([0-9]+) chunks: [0-9]+/\1 \2/')
+echo found snapshot $SNAPSHOT_DETAILS
+rm -rf /root/.agoric/data/application.db /root/.agoric/data/agoric
+agd snapshots restore $SNAPSHOT_DETAILS
+
+startAgd
diff --git a/a3p-integration/proposals/z:acceptance/test.sh b/a3p-integration/proposals/z:acceptance/test.sh
index 38ffa27a4ae..0447826a85d 100755
--- a/a3p-integration/proposals/z:acceptance/test.sh
+++ b/a3p-integration/proposals/z:acceptance/test.sh
@@ -11,3 +11,5 @@ GLOBIGNORE=initial.test.js
 yarn ava ./*.test.js
 
 ./create-kread-item-test.sh
+
+./state-sync-snapshots-test.sh
diff --git a/a3p-integration/yarn.lock b/a3p-integration/yarn.lock
index ea0f0da0407..c5c8e80616e 100644
--- a/a3p-integration/yarn.lock
+++ b/a3p-integration/yarn.lock
@@ -5,7 +5,7 @@ __metadata:
   version: 8
   cacheKey: 10c0
 
-"@agoric/synthetic-chain@npm:^0.1.0":
+"@agoric/synthetic-chain@npm:0.1.0":
   version: 0.1.0
   resolution: "@agoric/synthetic-chain@npm:0.1.0"
   dependencies:
@@ -19,6 +19,20 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@agoric/synthetic-chain@patch:@agoric/synthetic-chain@npm%3A0.1.0#~/.yarn/patches/@agoric-synthetic-chain-npm-0.1.0-148de716a6.patch":
+  version: 0.1.0
+  resolution: "@agoric/synthetic-chain@patch:@agoric/synthetic-chain@npm%3A0.1.0#~/.yarn/patches/@agoric-synthetic-chain-npm-0.1.0-148de716a6.patch::version=0.1.0&hash=4a65eb"
+  dependencies:
+    "@endo/zip": "npm:^1.0.1"
+    better-sqlite3: "npm:^9.4.0"
+    chalk: "npm:^5.3.0"
+    execa: "npm:^8.0.1"
+  bin:
+    synthetic-chain: dist/cli/cli.js
+  checksum: 10c0/e974038161b1a9570912a02d9366c6680bc13ee3dfd0e49d06e5ce5e93dbcddf04d1d4cd453af0969bf29ccfe96ce3e141a214539722449add90b13f0785f1f7
+  languageName: node
+  linkType: hard
+
 "@endo/zip@npm:^1.0.1":
   version: 1.0.1
   resolution: "@endo/zip@npm:1.0.1"
@@ -990,7 +1004,7 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "root-workspace-0b6124@workspace:."
   dependencies:
-    "@agoric/synthetic-chain": "npm:^0.1.0"
+    "@agoric/synthetic-chain": "patch:@agoric/synthetic-chain@npm%3A0.1.0#~/.yarn/patches/@agoric-synthetic-chain-npm-0.1.0-148de716a6.patch"
     "@types/better-sqlite3": "npm:^7.6.9"
   languageName: unknown
   linkType: soft