1 files changed, 2 insertions, 2 deletions
diff --git a/src/libsyntax/test.rs b/src/libsyntax/test.rs
index f90b76721ee..156fab8834c 100644
--- a/src/libsyntax/test.rs
+++ b/src/libsyntax/test.rs
@@ -120,8 +120,8 @@ impl<'a> MutVisitor for TestHarnessGenerator<'a> {
         // We don't want to recurse into anything other than mods, since
         // mods or tests inside of functions will break things
         if let ast::ItemKind::Mod(mut module) = item.node {
-            let tests = mem::replace(&mut self.tests, Vec::new());
-            let tested_submods = mem::replace(&mut self.tested_submods, Vec::new());
+            let tests = mem::take(&mut self.tests);
+            let tested_submods = mem::take(&mut self.tested_submods);
             noop_visit_mod(&mut module, self);
             let tests = mem::replace(&mut self.tests, tests);
             let tested_submods = mem::replace(&mut self.tested_submods, tested_submods);