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-rw-r--r--tests/codegen/vec-len-invariant.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/codegen/vec-len-invariant.rs b/tests/codegen/vec-len-invariant.rs
index 780c86bab95..033181c2bfb 100644
--- a/tests/codegen/vec-len-invariant.rs
+++ b/tests/codegen/vec-len-invariant.rs
@@ -1,4 +1,4 @@
-//@ compile-flags: -O
+//@ compile-flags: -Copt-level=3
 //@ only-64bit
 //
 // This test confirms that we do not reload the length of a Vec after growing it in push.