1 files changed, 10 insertions, 0 deletions
diff --git a/src/test/ui/suggestions/raw-byte-string-prefix.rs b/src/test/ui/suggestions/raw-byte-string-prefix.rs
new file mode 100644
index 000000000..576561c31
--- /dev/null
+++ b/src/test/ui/suggestions/raw-byte-string-prefix.rs
@@ -0,0 +1,10 @@
+// `br` and `rb` are easy to confuse; check that we issue a suggestion to help.
+
+// edition:2021
+
+fn main() {
+    rb"abc";
+    //~^ ERROR: prefix `rb` is unknown
+    //~| HELP: use `br` for a raw byte string
+    //~| ERROR: expected one of
+}