I picked up this linter in the latest golangci-lint release (includes 0.0.3) and am trying with the latest 0.0.4 version as well. I am still seeing the previously-resolved false positive. The only difference I can think of might be because my constant is in a different package?

package session:

const TokenExp = 10 * 60

package service (test file):

require.WithinDuration(t, time.Now().Add(session.TokenExp*time.Second), loginResp.ExpiresAt.AsTime(),
2*time.Second)

Result:

$ durationcheck ./...
.../session_test.go:54:4: Multiplication of durations: `session.TokenExp * time.Second`