| It seems that the 2 second timeout is not enough for Travis CI:
   --- FAIL: TestTestMode (2.00s)
       ethash_test.go:53: sealing result timeout | ||
|---|---|---|
| .. | ||
| clique | ||
| ethash | ||
| misc | ||
| consensus.go | ||
| errors.go | ||
| It seems that the 2 second timeout is not enough for Travis CI:
   --- FAIL: TestTestMode (2.00s)
       ethash_test.go:53: sealing result timeout | ||
|---|---|---|
| .. | ||
| clique | ||
| ethash | ||
| misc | ||
| consensus.go | ||
| errors.go | ||