// FIXME: if/when the output of the test harness can be tested on its own, this test should be
// adapted to use that, and that normalize line can go away
-// compile-flags:--test
+// compile-flags:--test --test-args --test-threads=1
+// rustc-env:RUST_BACKTRACE=0
// normalize-stdout-test: "src/test/rustdoc-ui" -> "$$DIR"
// failure-status: 101