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-rw-r--r--src/libsyntax_ext/test_harness.rs3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/libsyntax_ext/test_harness.rs b/src/libsyntax_ext/test_harness.rs
index 1492f6f575f..659780d7a43 100644
--- a/src/libsyntax_ext/test_harness.rs
+++ b/src/libsyntax_ext/test_harness.rs
@@ -67,7 +67,8 @@ pub fn inject(
                 PanicStrategy::Unwind
             }
             (PanicStrategy::Abort, false) => {
-                span_diagnostic.err("building tests with panic=abort is not yet supported");
+                span_diagnostic.err("building tests with panic=abort is not supported \
+                                     without `-Zpanic_abort_tests`");
                 PanicStrategy::Unwind
             }
             (PanicStrategy::Unwind, _) => PanicStrategy::Unwind,