diff --git a/a3p-integration/proposals/a:upgrade-next/package.json b/a3p-integration/proposals/a:upgrade-next/package.json
index b25466ff0db..5835264e09b 100644
--- a/a3p-integration/proposals/a:upgrade-next/package.json
+++ b/a3p-integration/proposals/a:upgrade-next/package.json
@@ -13,9 +13,13 @@
   "type": "module",
   "license": "Apache-2.0",
   "dependencies": {
-    "@agoric/synthetic-chain": "^0.0.7-1",
+    "@agoric/synthetic-chain": "^0.0.7-5",
     "ava": "^5.3.1"
   },
+  "ava": {
+    "concurrency": 1,
+    "serial": true
+  },
   "scripts": {
     "agops": "yarn --cwd /usr/src/agoric-sdk/ --silent agops"
   },
diff --git a/a3p-integration/proposals/a:upgrade-next/yarn.lock b/a3p-integration/proposals/a:upgrade-next/yarn.lock
index d20dc303d87..f7bffdba4b7 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:^0.0.7-1":
-  version: 0.0.7-1
-  resolution: "@agoric/synthetic-chain@npm:0.0.7-1"
+"@agoric/synthetic-chain@npm:^0.0.7-5":
+  version: 0.0.7-5
+  resolution: "@agoric/synthetic-chain@npm:0.0.7-5"
   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/dc30624063c619a5a7deb2e5a0a2ded19a03aad99465b3f5ffa8cf8a719ac99da3b4e3c4a42d65c69904a84a4aa9cebde3f33abcee7f5ddb88e469a1c55a997c
+  checksum: 10c0/c2f04793b4103b2affebf1e0107fee473b9127dbb39fe6c3fe5ee9a773d999a16be64dfee71d7ff37e00827a782c5b214ace3b9327368f2873c467f886cd3045
   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:^0.0.7-1"
+    "@agoric/synthetic-chain": "npm:^0.0.7-5"
     ava: "npm:^5.3.1"
   languageName: unknown
   linkType: soft
diff --git a/a3p-integration/proposals/b:restart-vats/package.json b/a3p-integration/proposals/b:restart-vats/package.json
index 0942e6d47b5..279d2d02ed2 100644
--- a/a3p-integration/proposals/b:restart-vats/package.json
+++ b/a3p-integration/proposals/b:restart-vats/package.json
@@ -1,13 +1,17 @@
 {
-    "agoricProposal": {
-        "type": "/agoric.swingset.CoreEvalProposal",
-        "source": "subdir"
-    },
-    "type": "module",
-    "license": "Apache-2.0",
-    "dependencies": {
-        "@agoric/synthetic-chain": "^0.0.6-4",
-        "ava": "^5.3.1"
-    },
-    "packageManager": "yarn@4.1.0"
+  "agoricProposal": {
+    "type": "/agoric.swingset.CoreEvalProposal",
+    "source": "subdir"
+  },
+  "type": "module",
+  "license": "Apache-2.0",
+  "dependencies": {
+    "@agoric/synthetic-chain": "^0.0.7-5",
+    "ava": "^5.3.1"
+  },
+  "ava": {
+    "concurrency": 1,
+    "serial": true
+  },
+  "packageManager": "yarn@4.1.0"
 }
diff --git a/a3p-integration/proposals/b:restart-vats/yarn.lock b/a3p-integration/proposals/b:restart-vats/yarn.lock
index c1c1a3f6db0..53a396ea1e2 100644
--- a/a3p-integration/proposals/b:restart-vats/yarn.lock
+++ b/a3p-integration/proposals/b:restart-vats/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:^0.0.7-5":
+  version: 0.0.7-5
+  resolution: "@agoric/synthetic-chain@npm:0.0.7-5"
   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/c2f04793b4103b2affebf1e0107fee473b9127dbb39fe6c3fe5ee9a773d999a16be64dfee71d7ff37e00827a782c5b214ace3b9327368f2873c467f886cd3045
   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:^0.0.7-5"
     ava: "npm:^5.3.1"
   languageName: unknown
   linkType: soft