message: Note that harness=false enables cfg(test).
diff: @@ -248,6 +248,9 @@ default is `true` for all targets.
  If set to `false`, then you are responsible for defining a `main()` function
  to run tests and benchmarks.
  +Tests have the [`cfg(test)` conditional expression][cfg-test] enabled whether
  +or not the harness is enabled.
  +
  #### The `edition` field
  The `edition` field defines the [Rust edition] the target will use. If not
  @@ -353,6 +356,7 @@ autobins = false
  [`cargo install`]: ../commands/cargo-install.md
  [`cargo run`]: ../commands/cargo-run.md
  [`cargo test`]: ../commands/cargo-test.md
  +[cfg-test]: ../../reference/conditional-compilation.html#test
  [crate types]: ../../reference/linkage.html
  [crates.io]: https://crates.io/
  [customized]: #configuring-a-target
  