diff --git a/tests/source/where-clause.rs b/tests/source/where-clause.rs
index 2a916082548..686e4531211 100644
--- a/tests/source/where-clause.rs
+++ b/tests/source/where-clause.rs
@@ -56,3 +56,8 @@ impl<'a, 'gcx, 'tcx> ProbeContext<'a, 'gcx, 'tcx> {
         // ...
     }
 }
+
+// #4315
+pub trait AsUnindented {
+    type Output<'ast> where Self: 'ast;
+}
diff --git a/tests/target/where-clause.rs b/tests/target/where-clause.rs
index eb2f8d5e6e8..21c80a121db 100644
--- a/tests/target/where-clause.rs
+++ b/tests/target/where-clause.rs
@@ -105,3 +105,8 @@ impl<'a, 'gcx, 'tcx> ProbeContext<'a, 'gcx, 'tcx> {
         // ...
     }
 }
+
+// #4315
+pub trait AsUnindented {
+    type Output<'ast> where Self: 'ast;
+}