1 files changed, 4 insertions, 1 deletions
diff --git a/tests/ui/macros/issue-78325-inconsistent-resolution.rs b/tests/ui/macros/issue-78325-inconsistent-resolution.rs
index 919eca4f9bf..021ba599d12 100644
--- a/tests/ui/macros/issue-78325-inconsistent-resolution.rs
+++ b/tests/ui/macros/issue-78325-inconsistent-resolution.rs
@@ -1,3 +1,5 @@
+//@ edition: 2018
+
 macro_rules! define_other_core {
     ( ) => {
         extern crate std as core;
@@ -6,7 +8,8 @@ macro_rules! define_other_core {
 }
 
 fn main() {
-    core::panic!();
+    core::panic!(); //~ ERROR `core` is ambiguous
+    ::core::panic!(); //~ ERROR `core` is ambiguous
 }
 
 define_other_core!();