diff --git a/packages/api/src/derives/cennzx/cennzxTrade.e2e.ts b/packages/api/src/derives/cennzx/cennzxTrade.e2e.ts
index 33cfec120..2dfe6a262 100644
--- a/packages/api/src/derives/cennzx/cennzxTrade.e2e.ts
+++ b/packages/api/src/derives/cennzx/cennzxTrade.e2e.ts
@@ -61,7 +61,7 @@ describe('Cennzx Operations', () => {
       // when the new asset is created it will have this ID.
       assetA = await api.query.genericAsset.nextAssetId();
       // Create new asset
-      const assetCreated = new Promise(async resolve => {
+      const assetCreated = new Promise<void>(async resolve => {
         await api.tx.sudo
           .sudo(createAssetTx1)
           .signAndSend(sudoKeypair, { nonce: nonce++ }, async ({ status }) => (status.isInBlock ? resolve() : null));
@@ -105,7 +105,7 @@ describe('Cennzx Operations', () => {
       // when the new asset is created it will have this ID.
       assetB = await api.query.genericAsset.nextAssetId();
       // Create new asset
-      const assetCreated = new Promise(async (resolve, reject) => {
+      const assetCreated = new Promise<void>(async (resolve, reject) => {
         await api.tx.sudo
           .sudo(createAssetTx2)
           .signAndSend(sudoKeypair, { nonce: nonce++ }, async ({ status }) => (status.isInBlock ? resolve() : null));
diff --git a/packages/api/test/e2e/staking.e2e.ts b/packages/api/test/e2e/staking.e2e.ts
index cab8041d5..69553775e 100644
--- a/packages/api/test/e2e/staking.e2e.ts
+++ b/packages/api/test/e2e/staking.e2e.ts
@@ -289,7 +289,7 @@ describe('Staking Governance (Sudo Required)', () => {
 
   test('Force unstake', async done => {
     const bobStash = keyring.addFromUri('//Bob//stash');
-    new Promise(async (resolve) => {
+    new Promise<void>(async (resolve) => {
       // bond bob's stash account.
       await api.tx.staking.bond(bob.address, 10_000, 'controller')
           .signAndSend( bobStash, async ({ status }) => {
diff --git a/packages/api/test/e2e/tx.e2e.ts b/packages/api/test/e2e/tx.e2e.ts
index 3cba50e89..ff2ac33ee 100644
--- a/packages/api/test/e2e/tx.e2e.ts
+++ b/packages/api/test/e2e/tx.e2e.ts
@@ -118,7 +118,7 @@ describe('e2e transactions', () => {
 
       // 1) Create the new fee asset
       // 2) Mint CPAY to assetOwner to fund subsequent pool liquidity and further transactions.
-      const assetCreated = new Promise(async (resolve, reject) => {
+      const assetCreated = new Promise<void>(async (resolve, reject) => {
         let nonce = await api.rpc.system.accountNextIndex(sudoAddress);
         await api.tx.sudo.sudo(createAssetTx).signAndSend(sudoKeypair, { nonce: nonce++ });
         await api.tx.genericAsset.mint(spendingAssetId, assetOwner.address, initialIssuance).signAndSend(