diff --git a/packages/deployment/upgrade-test/Readme.md b/packages/deployment/upgrade-test/Readme.md
index cd6eacb6b2f..731e0f710c1 100644
--- a/packages/deployment/upgrade-test/Readme.md
+++ b/packages/deployment/upgrade-test/Readme.md
@@ -1,20 +1,10 @@
 # Dockerized Chain Upgrade Tester
 
-This will build all previous upgrades and upgrade each one.
-
-## Upgrades
-
-| number | description    | notes                                                                      |
-| ------ | -------------- | -------------------------------------------------------------------------- |
-| 8      | PismoA         | Runs with Pismo release agoric-sdk (including CLI)                         |
-| 8.1    | PismoB         |
-| 9      | PismoC         |
-| 10     | --> Vaults     | Runs with latest SDK. Tests backwards compatibility with Pismo vstorage.   |
-| 11     | Vaults --> V+1 | Anticipated upgrade. Tests that Vaults release _can be_ upgraded in place. |
+This will build an image upgrade of [agoric-3-proposals](https://github.com/Agoric/agoric-3-proposals), a Docker based environment simulating the agoric-3 mainnet chain, using the latest agoric-sdk.
 
 ## Testing
 
-**To build the images to latest**
+**To build the upgrade image**
 
 ```shell
 make build
@@ -24,7 +14,7 @@ By default pre-releases use the lastest image tagged `dev` in our [container rep
 a specific build:
 
 ```shell
-DEST_IMAGE=docker pull ghcr.io/agoric/agoric-sdk:20230515033839-e56ae7
+DEST_IMAGE=ghcr.io/agoric/agoric-sdk:20230515033839-e56ae7
 ```
 To use a build based on local changes:
 ```shell
@@ -33,7 +23,7 @@ make local_sdk build
 # or DEST_IMAGE=ghcr.io/agoric/agoric-sdk:latest make build
 ```
 
-**To run the latest upgrade interactively**
+**To run the upgrade interactively**
 
 ```shell
 make run
@@ -54,15 +44,6 @@ If you run into other problems, you might have a local `agoric-sdk:latest` that
 is stale. Either `make local_sdk` or delete your local image so Docker pulls
 from the repository instead.
 
-**To build and run a specific upgrade**
-
-```shell
-TARGET=agoric-upgrade-10 make build run
-```
-
-This will put you in `/usr/src/agoric-sdk`. You'll run commands from here. `upgrade-test-scripts` is copied here with only the test scripts for the current image.
-
-
 If you lose the connection and want to get back,
 ```sh
 # find the container id
@@ -75,7 +56,7 @@ docker attach sweet_edison
 
 ```shell
 json='{"some":"json","here":123}'
-make build BUILD_OPTS="--build-arg UPGRADE_INFO_11='$json'"
+make build BUILD_OPTS="--build-arg UPGRADE_INFO='$json'"
 ```
 
 Search this directory for `UPGRADE_INFO` if you want to see how it is plumbed
@@ -101,24 +82,9 @@ make shell
 To make the wallet ui talk to your local chain, set the network config to
 `https://local.agoric.net/network-config`
 
-## To add an upgrade
-
-1. Update the upgrade handler in app.go
-2. Duplicate the last pair of UPGRADE and TEST blocks
-3. Update their number from the UPGRADE / DEST block at the end
-4. Make directory for tests (e.g. `agoric-upgrade-12`)
-4. Make directory for ugprade (e.g. `propose-agoric-upgrade-12` with a `.keep`)
-5. Update the UPGRADE/DEST pair to be your new upgrade (THIS_NAME matching the upgrade handler string in app.go)
-6. Update the `Makefile`
-  - the two targets to `Makefile` (e.g. `propose-agoric-upgrade-12` and `agoric-upgrade-12`)
-  - set the default TARGET (e.g. `agoric-upgrade-12`)
-  - add the DEST target to the `.phony` in `Makefile`
-7. Test with `make local_sdk build run`
-
-
 ## Development
 
-You can iterate on a particular upgrade by targeting. When you exit and run again, it will be a fresh state.
+When you exit and run again, the container will be a fresh state.
 
 By default targets that use "agoric-sdk:latest" will source from CI builds. To use your local checkout of agoric-sdk inside Docker run,
 
@@ -127,9 +93,9 @@ make local_sdk
 ```
 Builds an image: ghcr.io/agoric/agoric-sdk:latest that will be used by all your builds.
 
-That will produce the an image tagged agoric-sdk:latest in your local resolution. (Then run `make build run` again.)
+That will produce an image tagged agoric-sdk:latest in your local resolution. (Then run `make build run` again.)
 
-You can send information from one run to the next using `/envs`. A release N can append ENV variable setting shell commands to `"$HOME/.agoric/envs"`. The N+1 release will then have them in its environment. (Because `env_setup.sh` starts with `source "$HOME/.agoric/envs"`)
+For more details about the docker upgrade test framework, refer to the [agoric-3-proposals](https://github.com/Agoric/agoric-3-proposals) repository.
 
 ### IDE