diff --git a/packages/synthetic-chain/public/upgrade-test-scripts/env_setup.sh b/packages/synthetic-chain/public/upgrade-test-scripts/env_setup.sh
index a594036a..8904959a 100755
--- a/packages/synthetic-chain/public/upgrade-test-scripts/env_setup.sh
+++ b/packages/synthetic-chain/public/upgrade-test-scripts/env_setup.sh
@@ -107,10 +107,12 @@ provisionSmartWallet() {
   addr="$1"
   amount="$2"
   echo "funding $addr"
-  agd tx -bblock bank send "validator" "$addr" "$amount" -y --keyring-backend=test --chain-id="$CHAINID"
+  # shellcheck disable=SC2086
+  agd tx bank send "validator" "$addr" "$amount" $SIGN_BROADCAST_OPTS
   waitForBlock
   echo "provisioning $addr"
-  agd tx -bblock swingset provision-one my-wallet "$addr" SMART_WALLET --keyring-backend=test --yes --chain-id="$CHAINID" --from="$addr"
+  # shellcheck disable=SC2086
+  agd tx swingset provision-one my-wallet "$addr" SMART_WALLET --from="$addr" $SIGN_BROADCAST_OPTS
   echo "Waiting for wallet $addr to reach vstorage"
   waitForBlock 5
   echo "Reading $addr from vstorage"
@@ -192,7 +194,7 @@ test_not_val() {
 # gas=200000 is the default but gas used may be higher or lower. Setting it
 # to "auto" makes the proposal executions less brittle.
 GAS_ADJUSTMENT=1.2
-export SUBMIT_PROPOSAL_OPTS="--keyring-backend=test --chain-id=$CHAINID \
+export SIGN_BROADCAST_OPTS="--keyring-backend=test --chain-id=$CHAINID \
 		--gas=auto --gas-adjustment=$GAS_ADJUSTMENT \
 		--yes --broadcast-mode block --from validator"
 
@@ -202,9 +204,11 @@ voteLatestProposalAndWait() {
   proposal=$($binary q gov proposals -o json | jq -r '.proposals | last | if .proposal_id == null then .id else .proposal_id end')
   echo "Latest proposal: $proposal"
   waitForBlock
-  $binary tx -bblock gov deposit "$proposal" 50000000ubld --from=validator --chain-id="$CHAINID" --yes --keyring-backend test
+  # shellcheck disable=SC2086
+  $binary tx gov deposit "$proposal" 50000000ubld $SIGN_BROADCAST_OPTS
   waitForBlock
-  $binary tx -bblock gov vote "$proposal" yes --from=validator --chain-id="$CHAINID" --yes --keyring-backend test
+  # shellcheck disable=SC2086
+  $binary tx gov vote "$proposal" yes $SIGN_BROADCAST_OPTS
   waitForBlock
 
   echo "Voted in proposal $proposal"
diff --git a/packages/synthetic-chain/public/upgrade-test-scripts/run_prepare.sh b/packages/synthetic-chain/public/upgrade-test-scripts/run_prepare.sh
index 77970642..d615b7e9 100755
--- a/packages/synthetic-chain/public/upgrade-test-scripts/run_prepare.sh
+++ b/packages/synthetic-chain/public/upgrade-test-scripts/run_prepare.sh
@@ -58,7 +58,7 @@ fi
 agd tx gov submit-proposal software-upgrade "$UPGRADE_TO" \
   --upgrade-height="$height" --upgrade-info="$info" \
   --title="Upgrade to ${UPGRADE_TO}" --description="upgrades" \
-  ${SUBMIT_PROPOSAL_OPTS="--missing-env-setup"}
+  ${SIGN_BROADCAST_OPTS="--missing-env-setup"}
 waitForBlock
 
 voteLatestProposalAndWait
diff --git a/packages/synthetic-chain/public/upgrade-test-scripts/start_to_to.sh b/packages/synthetic-chain/public/upgrade-test-scripts/start_to_to.sh
index 7867f28f..6d86da02 100755
--- a/packages/synthetic-chain/public/upgrade-test-scripts/start_to_to.sh
+++ b/packages/synthetic-chain/public/upgrade-test-scripts/start_to_to.sh
@@ -32,7 +32,7 @@ fi
 agd tx gov submit-proposal software-upgrade "$UPGRADE_TO" \
   --upgrade-height="$height" --upgrade-info="$info" \
   --title="Upgrade to ${UPGRADE_TO}" --description="upgrades" \
-  ${SUBMIT_PROPOSAL_OPTS="--missing-env-setup"}
+  ${SIGN_BROADCAST_OPTS="--missing-env-setup"}
 waitForBlock
 
 voteLatestProposalAndWait
diff --git a/proposals/16:upgrade-8/use.sh b/proposals/16:upgrade-8/use.sh
index 8291f894..984c9785 100755
--- a/proposals/16:upgrade-8/use.sh
+++ b/proposals/16:upgrade-8/use.sh
@@ -24,7 +24,8 @@ waitForBlock 2
 waitForBlock 3
 # fund provision pool
 stakeamount="20000000${USDC_DENOM}"
-agd tx bank send "validator" "agoric1megzytg65cyrgzs6fvzxgrcqvwwl7ugpt62346" "$stakeamount" -y --keyring-backend=test --chain-id="$CHAINID" -bblock
+# shellcheck disable=SC2086
+agd tx bank send "validator" "agoric1megzytg65cyrgzs6fvzxgrcqvwwl7ugpt62346" "$stakeamount" ${SIGN_BROADCAST_OPTS="--missing-env-setup"}
 waitForBlock 3
 
 govaccounts=("$GOV1ADDR" "$GOV2ADDR" "$GOV3ADDR")
diff --git a/proposals/61:lo-bundle-cost/eval.sh b/proposals/61:lo-bundle-cost/eval.sh
index 8de3424a..c1cd4c2b 100644
--- a/proposals/61:lo-bundle-cost/eval.sh
+++ b/proposals/61:lo-bundle-cost/eval.sh
@@ -7,6 +7,6 @@ source /usr/src/upgrade-test-scripts/env_setup.sh
 
 # shellcheck disable=SC2086
 agd tx gov submit-proposal param-change lower-bundle-cost.json \
-	${SUBMIT_PROPOSAL_OPTS="--missing-env-setup"}
+	${SIGN_BROADCAST_OPTS="--missing-env-setup"}
 
 voteLatestProposalAndWait