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diff --git a/tests/ui/error-codes/E0263.stderr b/tests/ui/error-codes/E0263.stderr
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+++ b/tests/ui/error-codes/E0263.stderr
@@ -0,0 +1,11 @@
+error[E0403]: the name `'a` is already used for a generic parameter in this item's generic parameters
+  --> $DIR/E0263.rs:1:16
+   |
+LL | fn foo<'a, 'b, 'a>(x: &'a str, y: &'b str) {
+   |        --      ^^ already used
+   |        |
+   |        first use of `'a`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0403`.