When a test fails, it pops up an extra error in "after each" hook: after test:

[atvanguard]

Uncaught Error: Couldn't decode bytes32 from ABI: 0x02d554cdd75e795e9e3547843a66321a5ba4ab21c3cb141197b194f410ede8dc The size doesn't match.
      at SolidityTypeBytes.formatOutputBytes [as _outputFormatter] (/Users/arpit/.nvm/versions/node/v11.1.0/lib/node_modules/truffle/build/webpack:/~/web3-eth-abi/src/formatters.js:213:1)
      at SolidityTypeBytes.SolidityType.decode (/Users/arpit/.nvm/versions/node/v11.1.0/lib/node_modules/truffle/build/webpack:/~/web3-eth-abi/src/type.js:252:1)
      at /Users/arpit/.nvm/versions/node/v11.1.0/lib/node_modules/truffle/build/webpack:/~/web3-eth-abi/src/index.js:327:1
      at Array.forEach (<anonymous>)
      at ABICoder.decodeParameters (/Users/arpit/.nvm/versions/node/v11.1.0/lib/node_modules/truffle/build/webpack:/~/web3-eth-abi/src/index.js:326:1)
...