macros.patch

diff --git a/tests/ui/auxiliary/macro_rules.rs b/tests/ui/auxiliary/macro_rules.rs
index 486e419b..2d8d571d 100644
--- a/tests/ui/auxiliary/macro_rules.rs
+++ b/tests/ui/auxiliary/macro_rules.rs
@@ -7,3 +7,9 @@ macro_rules! foofoo {
         loop {}
     };
 }
+
+macro_rules! must_use_unit {
+    () => {
+        fn foo() {}
+    }
+}
diff --git a/tests/ui/must_use_unit.rs b/tests/ui/must_use_unit.rs
index 8ea893d9..90af7f28 100644
--- a/tests/ui/must_use_unit.rs
+++ b/tests/ui/must_use_unit.rs
@@ -1,8 +1,12 @@
 //run-rustfix
+// aux-build:macro_rules.rs
 
 #![warn(clippy::must_use_unit)]
 #![allow(clippy::unused_unit)]
 
+#[macro_use]
+extern crate macro_rules;
+
 #[must_use]
 pub fn must_use_default() {}
 
@@ -16,4 +20,7 @@ fn main() {
     must_use_default();
     must_use_unit();
     must_use_with_note();
+
+    // We should not lint in external macros
+    must_use_unit!()
 }