diff --git a/upgrade-test/Dockerfile b/upgrade-test/Dockerfile
index 37427f02..e258c158 100644
--- a/upgrade-test/Dockerfile
+++ b/upgrade-test/Dockerfile
@@ -1,6 +1,5 @@
 # Defaults
 ARG DEST_IMAGE=ghcr.io/agoric/agoric-sdk:dev
-ARG BOOTSTRAP_MODE=main
 
 # TODO different naming scheme for upgrade handler (in app.go) and the image name
 
@@ -15,10 +14,8 @@ ARG BOOTSTRAP_MODE=main
 ## START
 # on agoric-uprade-7-2, with upgrade to agoric-upgrade-8
 FROM ghcr.io/agoric/ag0:agoric-upgrade-7-2 as agoric-upgrade-7-2
-ARG BOOTSTRAP_MODE
 ARG UPGRADE_INFO_8
-ENV UPGRADE_TO=agoric-upgrade-8 UPGRADE_INFO=${UPGRADE_INFO_8} THIS_NAME=agoric-upgrade-7-2 BOOTSTRAP_MODE=${BOOTSTRAP_MODE}
-RUN echo "${BOOTSTRAP_MODE}"
+ENV UPGRADE_TO=agoric-upgrade-8 UPGRADE_INFO=${UPGRADE_INFO_8} THIS_NAME=agoric-upgrade-7-2
 RUN mkdir -p /usr/src/agoric-sdk/upgrade-test-scripts
 WORKDIR /usr/src/agoric-sdk/
 COPY ./start_ag0.sh ./upgrade-test-scripts/
@@ -30,8 +27,7 @@ RUN . ./upgrade-test-scripts/start_ag0.sh
 ## UPGRADE+TEST
 ## this is agoric-upgrade-8 aka pismoA
 FROM ghcr.io/agoric/agoric-sdk:29 as agoric-upgrade-8
-ARG BOOTSTRAP_MODE
-ENV THIS_NAME=agoric-upgrade-8 BOOTSTRAP_MODE=${BOOTSTRAP_MODE}
+ENV THIS_NAME=agoric-upgrade-8
 # copy from previous build
 COPY --from=agoric-upgrade-7-2 /root/.agoric /root/.agoric
 
@@ -47,8 +43,8 @@ RUN . ./upgrade-test-scripts/start_to_to.sh
 ARG DEST_IMAGE
 #this is agoric-upgrade-8-1 aka pismoB
 FROM ghcr.io/agoric/agoric-sdk:30 as agoric-upgrade-8-1
-ARG BOOTSTRAP_MODE UPGRADE_INFO_9
-ENV THIS_NAME=agoric-upgrade-8-1 UPGRADE_TO=agoric-upgrade-9 UPGRADE_INFO=${UPGRADE_INFO_9} BOOTSTRAP_MODE=${BOOTSTRAP_MODE}
+ARG UPGRADE_INFO_9
+ENV THIS_NAME=agoric-upgrade-8-1 UPGRADE_TO=agoric-upgrade-9 UPGRADE_INFO=${UPGRADE_INFO_9}
 WORKDIR /usr/src/agoric-sdk/
 COPY ./env_setup.sh ./start_to_to.sh ./upgrade-test-scripts/
 COPY ./${THIS_NAME} ./upgrade-test-scripts/${THIS_NAME}/
@@ -61,8 +57,8 @@ RUN . ./upgrade-test-scripts/start_to_to.sh
 ARG DEST_IMAGE
 # this is agoric-upgrade-9 / pismoC with upgrade to agoric-upgrade-10
 FROM ghcr.io/agoric/agoric-sdk:31 as agoric-upgrade-9
-ARG BOOTSTRAP_MODE UPGRADE_INFO_10
-ENV THIS_NAME=agoric-upgrade-9 UPGRADE_TO=agoric-upgrade-10 UPGRADE_INFO=${UPGRADE_INFO_10} BOOTSTRAP_MODE=${BOOTSTRAP_MODE}
+ARG UPGRADE_INFO_10
+ENV THIS_NAME=agoric-upgrade-9 UPGRADE_TO=agoric-upgrade-10 UPGRADE_INFO=${UPGRADE_INFO_10}
 
 WORKDIR /usr/src/agoric-sdk/
 COPY ./env_setup.sh ./start_to_to.sh ./upgrade-test-scripts/
@@ -77,8 +73,7 @@ RUN . ./upgrade-test-scripts/start_to_to.sh
 ARG DEST_IMAGE
 #this is agoric-upgrade-10 / vaults
 FROM ghcr.io/agoric/agoric-sdk:35 as agoric-upgrade-10
-ARG BOOTSTRAP_MODE
-ENV THIS_NAME=agoric-upgrade-10 USE_JS=1 BOOTSTRAP_MODE=${BOOTSTRAP_MODE}
+ENV THIS_NAME=agoric-upgrade-10 USE_JS=1
 
 WORKDIR /usr/src/agoric-sdk/
 COPY ./env_setup.sh ./start_to_to.sh ./package.json ./*.js ./upgrade-test-scripts/
@@ -96,8 +91,8 @@ ARG DEST_IMAGE
 #this is agoric-upgrade-10 upgrading to 11
 #it's a separate target because agoric-upgrade-10 takes so long to test
 FROM ghcr.io/agoric/agoric-sdk:35 as propose-agoric-upgrade-11
-ARG BOOTSTRAP_MODE UPGRADE_INFO_11
-ENV THIS_NAME=propose-agoric-upgrade-11 UPGRADE_TO=agoric-upgrade-11 UPGRADE_INFO=${UPGRADE_INFO_11} BOOTSTRAP_MODE=${BOOTSTRAP_MODE}
+ARG UPGRADE_INFO_11
+ENV THIS_NAME=propose-agoric-upgrade-11 UPGRADE_TO=agoric-upgrade-11 UPGRADE_INFO=${UPGRADE_INFO_11}
 WORKDIR /usr/src/agoric-sdk/
 COPY ./env_setup.sh ./start_to_to.sh ./upgrade-test-scripts/
 RUN cd upgrade-test-scripts && yarn
@@ -113,8 +108,7 @@ RUN . ./upgrade-test-scripts/start_to_to.sh
 #this is agoric-upgrade-11 / vaults+1
 ARG DEST_IMAGE
 FROM ghcr.io/agoric/agoric-sdk:36 as agoric-upgrade-11
-ARG BOOTSTRAP_MODE
-ENV THIS_NAME=agoric-upgrade-11 BOOTSTRAP_MODE=${BOOTSTRAP_MODE} USE_JS=1
+ENV THIS_NAME=agoric-upgrade-11 USE_JS=1
 # start-chain boilerplate
 WORKDIR /usr/src/agoric-sdk/
 COPY ./env_setup.sh ./start_to_to.sh ./package.json ./*.js ./upgrade-test-scripts/
@@ -131,8 +125,8 @@ RUN . ./upgrade-test-scripts/start_to_to.sh
 ARG DEST_IMAGE
 FROM ghcr.io/agoric/agoric-sdk:36 as propose-agoric-upgrade-12
 # TODO: Replace with actual Zoe core proposal for upgrade 12 (MCS, Kread, Zoe, restart-contracts, etc)
-ARG BOOTSTRAP_MODE UPGRADE_INFO_12='{"coreProposals":["@agoric/builders/scripts/vats/init-network.js"]}'
-ENV THIS_NAME=propose-agoric-upgrade-12 UPGRADE_TO=agoric-upgrade-12 UPGRADE_INFO=${UPGRADE_INFO_12} BOOTSTRAP_MODE=${BOOTSTRAP_MODE}
+ARG UPGRADE_INFO_12='{"coreProposals":["@agoric/builders/scripts/vats/init-network.js"]}'
+ENV THIS_NAME=propose-agoric-upgrade-12 UPGRADE_TO=agoric-upgrade-12 UPGRADE_INFO=${UPGRADE_INFO_12}
 COPY --from=agoric-upgrade-11 /root/.agoric /root/.agoric
 # start-chain boilerplate
 WORKDIR /usr/src/agoric-sdk/
@@ -149,8 +143,7 @@ RUN . ./upgrade-test-scripts/start_to_to.sh
 #this is agoric-upgrade-12 / multi-collateral, etc.
 ARG DEST_IMAGE
 FROM ${DEST_IMAGE} as agoric-upgrade-12
-ARG BOOTSTRAP_MODE
-ENV THIS_NAME=agoric-upgrade-12 BOOTSTRAP_MODE=${BOOTSTRAP_MODE}
+ENV THIS_NAME=agoric-upgrade-12
 COPY --from=propose-agoric-upgrade-12 /root/.agoric /root/.agoric
 # start-chain boilerplate
 WORKDIR /usr/src/agoric-sdk/
diff --git a/upgrade-test/Makefile b/upgrade-test/Makefile
index fb070ef6..80ab780a 100644
--- a/upgrade-test/Makefile
+++ b/upgrade-test/Makefile
@@ -1,12 +1,6 @@
 REPOSITORY = agoric/upgrade-test
 # use :dev (latest prerelease image) unless we build local sdk
 DEST_IMAGE ?= $(if $(findstring local_sdk,$(MAKECMDGOALS)),ghcr.io/agoric/agoric-sdk:latest,ghcr.io/agoric/agoric-sdk:dev)
-BOOTSTRAP_MODE?=main
-ifeq ($(BOOTSTRAP_MODE),main)
-	TAG_SUFFIX=
-else
-	TAG_SUFFIX=-$(BOOTSTRAP_MODE)
-endif
 TARGET?=agoric-upgrade-12
 dockerLabel?=$(TARGET)
 @echo target: $(TARGET)
@@ -15,7 +9,7 @@ local_sdk:
 	(cd ../ && make docker-build-sdk)
 
 BUILD = docker build --progress=plain $(BUILD_OPTS) \
-	--build-arg BOOTSTRAP_MODE=$(BOOTSTRAP_MODE) --build-arg DEST_IMAGE=$(DEST_IMAGE) \
+	--build-arg DEST_IMAGE=$(DEST_IMAGE) \
 	-f Dockerfile upgrade-test-scripts
 
 agoric-upgrade-7-2:
@@ -48,10 +42,6 @@ agoric-upgrade-12: propose-agoric-upgrade-12
 # build main bootstrap
 build: $(TARGET)
 
-# build test bootstrap
-build_test: BOOTSTRAP_MODE=test
-build_test: $(TARGET)
-
 DEBUG ?= SwingSet:ls,SwingSet:vat
 RUN = docker run --rm -it \
 	-p 26656:26656 -p 26657:26657 -p 1317:1317 \
diff --git a/upgrade-test/upgrade-test-scripts/agoric-upgrade-10/pre.test.js b/upgrade-test/upgrade-test-scripts/agoric-upgrade-10/pre.test.js
index 57acca70..f5b1c96d 100644
--- a/upgrade-test/upgrade-test-scripts/agoric-upgrade-10/pre.test.js
+++ b/upgrade-test/upgrade-test-scripts/agoric-upgrade-10/pre.test.js
@@ -8,7 +8,6 @@ import {
   GOV1ADDR,
   GOV2ADDR,
   GOV3ADDR,
-  BOOTSTRAP_MODE,
   PSM_PAIR,
 } from '../constants.js';
 import { openVault } from '../econHelpers.js';
@@ -99,12 +98,7 @@ test('Validate PSM denoms', async t => {
 
   t.not(psmISTChildren.children.legnth, 0);
 
-  let denoms = ['USDC_axl', 'DAI_axl', 'DAI_grv'];
-  if (BOOTSTRAP_MODE === 'main') {
-    denoms = [...denoms, 'USDC_grv', 'USDT_axl', 'USDT_grv'];
-  } else {
-    denoms = [...denoms, 'ToyUSD'];
-  }
+  const denoms = ['USDC_axl', 'DAI_axl', 'DAI_grv', 'USDC_grv', 'USDT_axl', 'USDT_grv'];
 
   for (const denom of denoms) {
     t.truthy(psmISTChildren.children.includes(denom));
diff --git a/upgrade-test/upgrade-test-scripts/agoric-upgrade-9/test.sh b/upgrade-test/upgrade-test-scripts/agoric-upgrade-9/test.sh
index 69420ab8..ed41d262 100644
--- a/upgrade-test/upgrade-test-scripts/agoric-upgrade-9/test.sh
+++ b/upgrade-test/upgrade-test-scripts/agoric-upgrade-9/test.sh
@@ -1,14 +1,9 @@
 #!/bin/bash
 . ./upgrade-test-scripts/env_setup.sh
-# provision pool has right balance 
+# provision pool has right balance
 test_val $(agd query bank balances agoric1megzytg65cyrgzs6fvzxgrcqvwwl7ugpt62346 -o json | jq -r '.balances | first | .amount') "19000000"
 
-# ensure PSM IST has only ToyUSD
-expnum=4
-if [[ "$BOOTSTRAP_MODE" == "test" ]]; then
-    expnum=1
-fi
-test_val $(agd q vstorage children published.psm.IST -o json | jq -r '.children | length') "$expnum"
+test_val $(agd q vstorage children published.psm.IST -o json | jq -r '.children | length') 4
 test_val $(agd q vstorage children published.psm.IST -o json | jq -r '.children | first') ${PSM_PAIR//IST./}
 
 # Gov params
diff --git a/upgrade-test/upgrade-test-scripts/constants.js b/upgrade-test/upgrade-test-scripts/constants.js
index ce9ef265..e33bcd67 100644
--- a/upgrade-test/upgrade-test-scripts/constants.js
+++ b/upgrade-test/upgrade-test-scripts/constants.js
@@ -6,7 +6,6 @@ export const GOV3ADDR = process.env.GOV3ADDR;
 export const USER1ADDR = process.env.USER1ADDR;
 export const VALIDATORADDR = process.env.VALIDATORADDR;
 
-export const BOOTSTRAP_MODE = process.env.BOOTSTRAP_MODE;
 export const PSM_PAIR = process.env.PSM_PAIR;
 export const ATOM_DENOM = process.env.ATOM_DENOM;
 
diff --git a/upgrade-test/upgrade-test-scripts/env_setup.sh b/upgrade-test/upgrade-test-scripts/env_setup.sh
index 28945cd4..b71afa39 100755
--- a/upgrade-test/upgrade-test-scripts/env_setup.sh
+++ b/upgrade-test/upgrade-test-scripts/env_setup.sh
@@ -239,15 +239,9 @@ printKeys() {
 }
 
 
-export USDC_DENOM="ibc/toyusdc"
-# Recent transfer to Emerynet
-export ATOM_DENOM="ibc/06362C6F7F4FB702B94C13CD2E7C03DEC357683FD978936340B43FBFBC5351EB"
-export PSM_PAIR="IST.ToyUSD"
-if [[ "$BOOTSTRAP_MODE" == "main" ]]; then
-  export USDC_DENOM="ibc/295548A78785A1007F232DE286149A6FF512F180AF5657780FC89C009E2C348F"
-  export ATOM_DENOM="ibc/BA313C4A19DFBF943586C0387E6B11286F9E416B4DD27574E6909CABE0E342FA"
-  export PSM_PAIR="IST.USDC_axl"
-fi
+export USDC_DENOM="ibc/295548A78785A1007F232DE286149A6FF512F180AF5657780FC89C009E2C348F"
+export ATOM_DENOM="ibc/BA313C4A19DFBF943586C0387E6B11286F9E416B4DD27574E6909CABE0E342FA"
+export PSM_PAIR="IST.USDC_axl"
 
 # additional env specific to a version
 if test -f ./upgrade-test-scripts/$THIS_NAME/env_setup.sh; then
diff --git a/upgrade-test/upgrade-test-scripts/start_ag0.sh b/upgrade-test/upgrade-test-scripts/start_ag0.sh
index 4281ae92..45e30133 100644
--- a/upgrade-test/upgrade-test-scripts/start_ag0.sh
+++ b/upgrade-test/upgrade-test-scripts/start_ag0.sh
@@ -61,9 +61,6 @@ waitForBlock 2
 voting_period_s=10
 latest_height=$(ag0 status | jq -r .SyncInfo.latest_block_height)
 height=$(( $latest_height + $voting_period_s + 10 ))
-if [[ "$BOOTSTRAP_MODE" == "test" ]]; then
-  UPGRADE_TO=${UPGRADE_TO//agoric-/agorictest-}
-fi
 
 info=${UPGRADE_INFO-"{}"}
 if echo "$info" | jq .; then :
diff --git a/upgrade-test/upgrade-test-scripts/start_to_to.sh b/upgrade-test/upgrade-test-scripts/start_to_to.sh
index 2106129f..eeef7fa3 100644
--- a/upgrade-test/upgrade-test-scripts/start_to_to.sh
+++ b/upgrade-test/upgrade-test-scripts/start_to_to.sh
@@ -32,11 +32,6 @@ if [[ "$DEST" != "1" ]]; then
     exit 0
   fi
 
-  if [[ "$BOOTSTRAP_MODE" == "test" ]]; then
-    UPGRADE_TO=${UPGRADE_TO//agoric-/agorictest-}
-  fi
-
-
   voting_period_s=10
   latest_height=$(agd status | jq -r .SyncInfo.latest_block_height)
   height=$(( $latest_height + $voting_period_s + 10 ))