diff --git a/helpers/test-helper.js b/helpers/test-helper.js
index 9565e9bdf3..ffe4736595 100644
--- a/helpers/test-helper.js
+++ b/helpers/test-helper.js
@@ -1310,6 +1310,28 @@ exports.upgradeColonyOnceThenToLatest = async function (colony) {
   await exports.setStorageSlot(colony, "0x2", newSlotValue);
 };
 
+exports.upgradeExtensionOnceThenToLatest = async function (extension) {
+  // Same logic as above, but for extensions
+  const currentVersion = await extension.version();
+  const colonyAddress = await extension.getColony();
+  const colony = await IColony.at(colonyAddress);
+  const extensionIdentifier = await extension.identifier();
+  await colony.upgradeExtension(extensionIdentifier, currentVersion.addn(1));
+
+  const networkAddress = await colony.getColonyNetwork();
+  const colonyNetwork = await IColonyNetwork.at(networkAddress);
+  let newestVersion = 100;
+  let newestResolver = ethers.constants.AddressZero;
+  while (newestResolver === ethers.constants.AddressZero) {
+    newestResolver = await colonyNetwork.getExtensionResolver(extensionIdentifier, newestVersion);
+    newestVersion -= 1;
+  }
+
+  const existingSlot = await exports.web3GetStorageAt(extension.address, 2);
+  const newSlotValue = existingSlot.slice(0, 26) + newestResolver.slice(2);
+  await exports.setStorageSlot(extension, "0x2", newSlotValue);
+};
+
 exports.isMainnet = async function isMainnet() {
   const chainId = await exports.web3GetChainId();
   return chainId === MAINNET_CHAINID || chainId === FORKED_MAINNET_CHAINID;
diff --git a/test/extensions/voting-rep.js b/test/extensions/voting-rep.js
index f0788f9707..d3c1cd6c2f 100644
--- a/test/extensions/voting-rep.js
+++ b/test/extensions/voting-rep.js
@@ -34,6 +34,7 @@ const {
   expectEvent,
   getTokenArgs,
   getBlockTime,
+  upgradeExtensionOnceThenToLatest,
 } = require("../../helpers/test-helper");
 
 const { setupRandomColony, getMetaTransactionParameters, fundColonyWithTokens } = require("../../helpers/test-data-generator");
@@ -2833,8 +2834,9 @@ contract("Voting Reputation", (accounts) => {
     // This function as written would also need updating every version, but is infinitely more
     // upgradeable
     async function upgradeFromV9ToLatest(colonyInTest) {
-      await colonyInTest.upgradeExtension(VOTING_REPUTATION, 10);
-      await colonyInTest.upgradeExtension(VOTING_REPUTATION, 11);
+      const extensionAddress = await colonyNetwork.getExtensionInstallation(VOTING_REPUTATION, colonyInTest.address);
+      const extension = await IVotingReputation.at(extensionAddress);
+      await upgradeExtensionOnceThenToLatest(extension);
     }
 
     beforeEach(async () => {