Asking ChatGPT proves to be a valid way to get ideas:

class EnforceDateTimeProviderUsageTest : FunSpec({

val scope = Konsist
    .scopeFromProduction()
    .files
    .filter { it.name != "DateTimeProvider" }

  listOf(
    "LocalDate.now()", 
    "LocalDateTime.now()", 
    "Instant.now()"
  ).forEach { forbiddenCall ->
      scope.filter { it.text.contains(forbiddenCall) }.shouldBeEmpty()
  } 
})