2 files changed, 3 insertions, 1 deletions
diff --git a/packages/dev-utils/test/blockchain_lifecycle_test.ts b/packages/dev-utils/test/blockchain_lifecycle_test.ts
index 3d7d2e0ef..18e245aa3 100644
--- a/packages/dev-utils/test/blockchain_lifecycle_test.ts
+++ b/packages/dev-utils/test/blockchain_lifecycle_test.ts
@@ -1,6 +1,5 @@
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as chai from 'chai';
-import { BlockParamLiteral } from 'ethereum-types';
 import 'make-promises-safe';
 import 'mocha';
 
@@ -18,6 +17,7 @@ describe('BlockchainLifecycle tests', () => {
             await blockchainLifecycle.startAsync();
             await web3Wrapper.mineBlockAsync();
             const blockNumberAfter = await web3Wrapper.getBlockNumberAsync();
+            // tslint:disable-next-line:restrict-plus-operands
             expect(blockNumberAfter).to.be.equal(blockNumberBefore + 1);
             await blockchainLifecycle.revertAsync();
             const blockNumberAfterRevert = await web3Wrapper.getBlockNumberAsync();
diff --git a/packages/dev-utils/test/rpc_test.ts b/packages/dev-utils/test/rpc_test.ts
index cff946e23..68842ed3a 100644
--- a/packages/dev-utils/test/rpc_test.ts
+++ b/packages/dev-utils/test/rpc_test.ts
@@ -16,6 +16,7 @@ describe('RPC tests', () => {
             const blockNumberBefore = await web3Wrapper.getBlockNumberAsync();
             await web3Wrapper.mineBlockAsync();
             const blockNumberAfter = await web3Wrapper.getBlockNumberAsync();
+            // tslint:disable-next-line:restrict-plus-operands
             expect(blockNumberAfter).to.be.equal(blockNumberBefore + 1);
         });
     });
@@ -26,6 +27,7 @@ describe('RPC tests', () => {
             await web3Wrapper.increaseTimeAsync(TIME_DELTA);
             await web3Wrapper.mineBlockAsync();
             const blockTimestampAfter = await web3Wrapper.getBlockTimestampAsync(BlockParamLiteral.Latest);
+            // tslint:disable-next-line:restrict-plus-operands
             expect(blockTimestampAfter).to.be.at.least(blockTimestampBefore + TIME_DELTA);
         });
     });