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diff --git a/tests/ui/error-codes/E0254.stderr b/tests/ui/error-codes/E0254.stderr
new file mode 100644
index 000000000..b098f8e1a
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+++ b/tests/ui/error-codes/E0254.stderr
@@ -0,0 +1,18 @@
+error[E0254]: the name `alloc` is defined multiple times
+  --> $DIR/E0254.rs:11:5
+   |
+LL | extern crate alloc;
+   | ------------------- previous import of the extern crate `alloc` here
+...
+LL | use foo::alloc;
+   |     ^^^^^^^^^^ `alloc` reimported here
+   |
+   = note: `alloc` must be defined only once in the type namespace of this module
+help: you can use `as` to change the binding name of the import
+   |
+LL | use foo::alloc as other_alloc;
+   |     ~~~~~~~~~~~~~~~~~~~~~~~~~
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0254`.