Failing migration tests make other tests fail due to ProviderError

[cameel]

When I try to run trident tests locally, Migration.test.ts always fails. Tests only pass if I explicitly

git clone https://github.com/sushiswap/trident
cd trident/
yarn install
yarn build
yarn test

...

  42 passing (2m)
  2 pending
  38 failing

  1) Migration
       "before all" hook for "Should prepare for migration in chef":
     ProviderError: Must be authenticated!
      at HttpProvider.request (node_modules/hardhat/src/internal/core/providers/http.ts:49:19)
      at getNetworkId (node_modules/hardhat/src/internal/hardhat-network/provider/utils/makeForkClient.ts:109:43)
      at Object.makeForkClient (node_modules/hardhat/src/internal/hardhat-network/provider/utils/makeForkClient.ts:40:27)
      at Function.create (node_modules/hardhat/src/internal/hardhat-network/provider/node.ts:153:15)
      at HardhatNetworkProvider._init (node_modules/hardhat/src/internal/hardhat-network/provider/provider.ts:234:46)
      at async HardhatNetworkProvider._reset (node_modules/hardhat/src/internal/hardhat-network/provider/provider.ts:327:5)
      at async HardhatModule._resetAction (node_modules/hardhat/src/internal/hardhat-network/provider/modules/hardhat.ts:206:5)
      at async HardhatNetworkProvider.request (node_modules/hardhat/src/internal/hardhat-network/provider/provider.ts:108:18)
      at async Context.<anonymous> (test/Migration.test.ts:11:5)

...

The weird thing is it's only only the tests in test/Migration.test.ts that fail but once they do, every test after them fails with the same message. For example TridentMath:

TS_NODE_TRANSPILE_ONLY=1 npx hardhat test test/Migration.test.ts test/TridentMath.test.ts

  3) TridentMath
       "before all" hook for "TridentMath.sqrt() returns correct values":
     ProviderError: Must be authenticated!

If your run tests for TridentMath only, they succeed:

TS_NODE_TRANSPILE_ONLY=1 npx hardhat test test/TridentMath.test.ts

  TridentMath
    ✓ TridentMath.sqrt() returns correct values (196ms)


  1 passing (2s)