diff --git a/contracts/staking/test/unit_tests/stake_test.ts b/contracts/staking/test/unit_tests/stake_test.ts
index 4b196f6a8c..a444168a88 100644
--- a/contracts/staking/test/unit_tests/stake_test.ts
+++ b/contracts/staking/test/unit_tests/stake_test.ts
@@ -8,7 +8,6 @@ import {
     hexRandom,
     Numberish,
     shortZip,
-    toHex,
 } from '@0x/contracts-test-utils';
 import { StakingRevertErrors } from '@0x/order-utils';
 import { BigNumber } from '@0x/utils';
@@ -158,7 +157,7 @@ blockchainTests.resets('MixinStake unit tests', env => {
 
     describe('moveStake()', () => {
         const INVALID_POOL_ERROR = 'INVALID_POOL';
-        const INVALID_POOL_ID = hexLeftPad(toHex(0));
+        const INVALID_POOL_ID = hexLeftPad(0);
         const VALID_POOL_IDS = [hexRandom(), hexRandom()];
         let delegatedStakeToPoolByOwnerSlots: string[];
         let delegatedStakeByPoolIdSlots: string[];
@@ -199,6 +198,15 @@ blockchainTests.resets('MixinStake unit tests', env => {
             return expect(tx).to.revertWith(INVALID_POOL_ERROR);
         });
 
+        it('throws if the "from" and "to" pools are invalid', async () => {
+            const tx = testContract.moveStake.awaitTransactionSuccessAsync(
+                { status: StakeStatus.Delegated, poolId: INVALID_POOL_ID },
+                { status: StakeStatus.Delegated, poolId: INVALID_POOL_ID },
+                getRandomInteger(0, 100e18),
+            );
+            return expect(tx).to.revertWith(INVALID_POOL_ERROR);
+        });
+
         it('withdraws delegator rewards when "from" stake is delegated', async () => {
             const { logs } = await testContract.moveStake.awaitTransactionSuccessAsync(
                 { status: StakeStatus.Delegated, poolId: VALID_POOL_IDS[0] },