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-rw-r--r--src/test/rustdoc-ui/failed-doctest-output.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/test/rustdoc-ui/failed-doctest-output.rs b/src/test/rustdoc-ui/failed-doctest-output.rs
index fcbd7cabc69..90cdb5127be 100644
--- a/src/test/rustdoc-ui/failed-doctest-output.rs
+++ b/src/test/rustdoc-ui/failed-doctest-output.rs
@@ -2,7 +2,7 @@
 // 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