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diff --git a/tests/ui/macros/macro-doc-escapes.rs b/tests/ui/macros/macro-doc-escapes.rs
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+++ b/tests/ui/macros/macro-doc-escapes.rs
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+// run-pass
+// When expanding a macro, documentation attributes (including documentation comments) must be
+// passed "as is" without being parsed. Otherwise, some text will be incorrectly interpreted as
+// escape sequences, leading to an ICE.
+//
+// Related issues: #25929, #25943
+
+macro_rules! homura {
+    (#[$x:meta]) => ()
+}
+
+homura! {
+    /// \madoka \x41
+}
+
+fn main() { }