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-rw-r--r--tests/ui/write_with_newline.rs3
1 files changed, 3 insertions, 0 deletions
diff --git a/tests/ui/write_with_newline.rs b/tests/ui/write_with_newline.rs
index 2f53d4561af..02e043f9233 100644
--- a/tests/ui/write_with_newline.rs
+++ b/tests/ui/write_with_newline.rs
@@ -31,4 +31,7 @@ fn main() {
     write!(&mut v, "\\n"); // #3514
     write!(&mut v, "\\\n");
     write!(&mut v, "\\\\n");
+
+    // Raw strings
+    write!(&mut v, r"\n"); // #3778
 }