1 files changed, 17 insertions, 1 deletions
diff --git a/src/tools/clippy/tests/ui/mem_replace.rs b/src/tools/clippy/tests/ui/mem_replace.rs
index 93f6dcdec..3202e99e0 100644
--- a/src/tools/clippy/tests/ui/mem_replace.rs
+++ b/src/tools/clippy/tests/ui/mem_replace.rs
@@ -1,5 +1,7 @@
 // run-rustfix
-#![allow(unused_imports)]
+
+#![feature(custom_inner_attributes)]
+#![allow(unused)]
 #![warn(
     clippy::all,
     clippy::style,
@@ -77,3 +79,17 @@ fn main() {
     replace_with_default();
     dont_lint_primitive();
 }
+
+fn msrv_1_39() {
+    #![clippy::msrv = "1.39"]
+
+    let mut s = String::from("foo");
+    let _ = std::mem::replace(&mut s, String::default());
+}
+
+fn msrv_1_40() {
+    #![clippy::msrv = "1.40"]
+
+    let mut s = String::from("foo");
+    let _ = std::mem::replace(&mut s, String::default());
+}