diff --git a/contracts/test/EVMPrecompileTest.js b/contracts/test/EVMPrecompileTest.js
index 88450768e6..1ea20ba2d3 100755
--- a/contracts/test/EVMPrecompileTest.js
+++ b/contracts/test/EVMPrecompileTest.js
@@ -4,7 +4,7 @@ const fs = require('fs');
 const path = require('path');
 
 const { expectRevert } = require('@openzeppelin/test-helpers');
-const { setupSigners, getAdmin, deployWasm, storeWasm, execute, isDocker, ABI, createTokenFactoryTokenAndMint, getSeiBalance, rawHttpDebugTraceWithCallTracer} = require("./lib");
+const { setupSigners, getAdmin, deployWasm, storeWasm, execute, isDocker, ABI, createTokenFactoryTokenAndMint, getSeiBalance, rawHttpDebugTraceWithCallTracer, proposeParamChange} = require("./lib");
 
 function sleep(ms) {
     return new Promise((resolve) => setTimeout(resolve, ms));
@@ -125,8 +125,16 @@ describe("EVM Precompile Tester", function () {
         let govProposal;
 
         before(async function () {
-            const govProposalResponse = JSON.parse(await execute(`seid tx gov submit-proposal param-change ../contracts/test/param_change_proposal.json --from admin --fees 20000usei -b block -y -o json`))
-            govProposal = govProposalResponse.logs[0].events[3].attributes[1].value;
+            const proposalSpec = require('./param_change_proposal.json');
+            govProposal = await proposeParamChange(
+                proposalSpec.title,
+                proposalSpec.description,
+                proposalSpec.changes,
+                "200000000usei",
+                "20000usei",
+                "admin",
+                proposalSpec.is_expedited,
+            );
 
             const signer = accounts[0].signer
             const contractABIPath = '../../precompiles/gov/abi.json';
diff --git a/contracts/test/lib.js b/contracts/test/lib.js
index 83655dc40d..3bb7b3a74d 100644
--- a/contracts/test/lib.js
+++ b/contracts/test/lib.js
@@ -77,6 +77,19 @@ async function delay() {
     await sleep(1000)
 }
 
+// Default 2 because the very next block after submit can be empty
+// (tx still in mempool, lands one block later).
+async function waitForBlocks(blocks=2, timeoutMs=15000) {
+    const start = await ethers.provider.getBlockNumber()
+    const deadline = Date.now() + timeoutMs
+    while (Date.now() < deadline) {
+        const cur = await ethers.provider.getBlockNumber()
+        if (cur >= start + blocks) return
+        await sleep(50)
+    }
+    throw new Error(`block didn't advance by ${blocks} in ${timeoutMs}ms (start=${start})`)
+}
+
 async function getCosmosTx(provider, evmTxHash) {
     return await provider.send("sei_getCosmosTx", [evmTxHash])
 }
@@ -92,18 +105,21 @@ async function fundAddress(addr, amount="1000000000000000000000") {
 }
 
 async function evmSend(addr, fromKey, amount="10000000000000000000000000") {
-    const output = await execute(`seid tx evm send ${addr} ${amount} --from ${fromKey} -b block -y`);
+    const output = await execute(`seid tx evm send ${addr} ${amount} --from ${fromKey} -b sync -y`);
+    await waitForBlocks()
     return output.replace(/.*0x/, "0x").trim()
 }
 
 async function bankSend(toAddr, fromKey, amount="100000000000", denom="usei") {
-    const result = await execute(`seid tx bank send ${fromKey} ${toAddr} ${amount}${denom} -b block --fees 20000usei -y`);
-    await delay()
+    const result = await execute(`seid tx bank send ${fromKey} ${toAddr} ${amount}${denom} -b sync --fees 20000usei -y`);
+    await waitForBlocks()
     return result
 }
 
 async function fundSeiAddress(seiAddr, amount="100000000000", denom="usei", funder=adminKeyName) {
-    return await execute(`seid tx bank send ${funder} ${seiAddr} ${amount}${denom} -b block --fees 20000usei -y`);
+    const result = await execute(`seid tx bank send ${funder} ${seiAddr} ${amount}${denom} -b sync --fees 20000usei -y`);
+    await waitForBlocks()
+    return result
 }
 
 async function getSeiBalance(seiAddr, denom="usei") {
@@ -155,8 +171,8 @@ async function getKeySeiAddress(name) {
 
 async function associateKey(keyName) {
     try {
-        await execute(`seid tx evm associate-address --from ${keyName} -b block`)
-        await delay()
+        await execute(`seid tx evm associate-address --from ${keyName} -b sync`)
+        await waitForBlocks()
     }catch(e){
         console.log("skipping associate")
     }
@@ -219,15 +235,18 @@ async function rawHttpDebugTraceWithCallTracer(txHash) {
 }
 
 async function createTokenFactoryTokenAndMint(name, amount, recipient, from=adminKeyName) {
-    const command = `seid tx tokenfactory create-denom ${name} --from ${from} --gas=5000000 --fees=1000000usei -y --broadcast-mode block -o json`
-    const output = await execute(command);
-    const response = JSON.parse(output)
-    const token_denom = getEventAttribute(response, "create_denom", "new_token_denom")
-    const mint_command = `seid tx tokenfactory mint ${amount}${token_denom} --from ${from} --gas=5000000 --fees=1000000usei -y --broadcast-mode block -o json`
+    const command = `seid tx tokenfactory create-denom ${name} --from ${from} --gas=5000000 --fees=1000000usei -y --broadcast-mode sync -o json`
+    await execute(command);
+    // Tokenfactory denom is deterministic: factory/<creator-bech32>/<subdenom>.
+    const token_denom = `factory/${await getKeySeiAddress(from)}/${name}`
+    await waitForBlocks()
+    const mint_command = `seid tx tokenfactory mint ${amount}${token_denom} --from ${from} --gas=5000000 --fees=1000000usei -y --broadcast-mode sync -o json`
     await execute(mint_command);
+    await waitForBlocks()
 
-    const send_command = `seid tx bank send ${from} ${recipient} ${amount}${token_denom} --from ${from} --gas=5000000 --fees=1000000usei -y --broadcast-mode block -o json`
+    const send_command = `seid tx bank send ${from} ${recipient} ${amount}${token_denom} --from ${from} --gas=5000000 --fees=1000000usei -y --broadcast-mode sync -o json`
     await execute(send_command);
+    await waitForBlocks()
     return token_denom
 }
 
@@ -402,19 +421,52 @@ async function proposeParamChange(title, description, changes, deposit="20000000
     };
     const proposalJson = JSON.stringify(proposal);
     const tempFile = `/tmp/param_change_${Date.now()}.json`;
-    
+
     // Use base64 encoding to avoid quote escaping issues in Docker
     const base64Json = Buffer.from(proposalJson).toString('base64');
     await execute(`echo ${base64Json} | base64 -d > ${tempFile}`);
-    
-    const command = `seid tx gov submit-proposal param-change ${tempFile} --from ${from} --fees ${fees} -y -o json --broadcast-mode=block`;
+
+    // Identify the new proposal by diffing gov state before vs after submit.
+    const maxIdBefore = await maxProposalId();
+
+    const command = `seid tx gov submit-proposal param-change ${tempFile} --from ${from} --fees ${fees} -y -o json -b sync`;
     const output = await execute(command);
     await execute(`rm ${tempFile}`);
     const response = JSON.parse(output);
     if (response.code !== 0) {
         throw new Error(`Failed to submit proposal: ${response.raw_log}`);
     }
-    return getEventAttribute(response, "submit_proposal", "proposal_id");
+
+    const deadline = Date.now() + 30000;
+    while (Date.now() < deadline) {
+        const cur = await maxProposalId();
+        if (cur > maxIdBefore) {
+            const detail = JSON.parse(await execute(`seid q gov proposal ${cur} -o json`));
+            const observedTitle = detail.content?.title ?? detail.title;
+            if (observedTitle !== title) {
+                throw new Error(`proposal ${cur} title "${observedTitle}" does not match submitted "${title}" — concurrent submission?`);
+            }
+            return String(cur);
+        }
+        await sleep(250);
+    }
+    throw new Error(`proposal submitted (tx ${response.txhash}) but did not appear in gov state within 30s`);
+}
+
+// Returns the highest existing proposal id, or 0 if there are no proposals.
+async function maxProposalId() {
+    let out;
+    try {
+        // seid exits non-zero ("Error: no proposals found") on an empty
+        // gov set; the try/catch treats that as id=0.
+        out = await execute(`seid q gov proposals --reverse --limit 1 -o json 2>/dev/null`);
+    } catch (e) {
+        return 0;
+    }
+    if (!out || !out.trim()) return 0;
+    const proposals = JSON.parse(out).proposals || [];
+    if (proposals.length === 0) return 0;
+    return Number(proposals[0].proposal_id || proposals[0].id);
 }
 
 async function proposeDisableWasm(title="Disable WASM", description="Disable cosmwasm store code and instantiate operations", deposit="200000000usei", fees="200000usei", from=adminKeyName) {
@@ -498,9 +550,9 @@ async function ensureWasmDisabled(from=adminKeyName) {
 
 async function passProposal(proposalId,  desposit="200000000usei", fees="200000usei", from=adminKeyName) {
     if(await isDocker()) {
-        await executeOnAllNodes(`seid tx gov vote ${proposalId} yes --from node_admin -b block -y --fees ${fees}`)
+        await executeOnAllNodes(`seid tx gov vote ${proposalId} yes --from node_admin -b sync -y --fees ${fees}`)
     } else {
-        await execute(`seid tx gov vote ${proposalId} yes --from ${from} -b block -y --fees ${fees}`)
+        await execute(`seid tx gov vote ${proposalId} yes --from ${from} -b sync -y --fees ${fees}`)
     }
     // Poll for proposal status with shorter delay for faster tests
     for(let i=0; i<200; i++) {