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-rw-r--r--src/test/run-pass/string-self-append.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/test/run-pass/string-self-append.rs b/src/test/run-pass/string-self-append.rs
index a1243d33062..c19a2afbd41 100644
--- a/src/test/run-pass/string-self-append.rs
+++ b/src/test/run-pass/string-self-append.rs
@@ -17,7 +17,7 @@ pub fn main() {
     let mut expected_len = 1u;
     while i > 0 {
         error!(str::len(a));
-        fail_unless!((str::len(a) == expected_len));
+        assert!((str::len(a) == expected_len));
         a = a + a; // FIXME(#3387)---can't write a += a
         i -= 1;
         expected_len *= 2u;