diff --git a/test/test_acceptance.ml b/test/test_acceptance.ml
index 660e507..ed9c16e 100644
--- a/test/test_acceptance.ml
+++ b/test/test_acceptance.ml
@@ -658,6 +658,39 @@ let () =
     else
       print_endline "acceptance: skipping the raylib FFI case (no libraylib)";
 
+    (* The same boundary, from declarations nobody wrote. Every binding this
+       program calls came out of raylib's header through vendor/raylib/headers;
+       the package binds none of the four by hand, so if it runs at all the
+       importer produced working declarations.
+
+       What it prints pins more than that. ColorToInt of {17,34,51,68} is
+       0x11223344 — the four fields read in r,g,b,a order, so exchanging any
+       two changes the number — and ColorTint by white is the identity, which
+       hands the four bytes back separately. That is the same argument the
+       GetColor case makes and for the same reason: handing a struct over and
+       reading it back proves nothing, because storing and returning is
+       symmetric and a permuted layout comes back permuted the same way.
+       TextLength of "hello" is 5, which is only true if the generated wrapper
+       NUL-terminated the copy.
+
+       Skipped without FLAN_RAYLIB_H, because the import is opt-in — a build
+       needs libraylib linkable and not raylib-devel installed, and that is a
+       property worth keeping. The importer's own table does not skip: it runs
+       against test/headers/sample.h, which is committed. *)
+    (match Sys.getenv_opt "FLAN_RAYLIB_H" with
+     | Some h when Sys.file_exists h
+                   && Sys.command "ldconfig -p 2>/dev/null | grep -q libraylib" = 0 ->
+       let out = "10\n5\n287454020\n17\n34\n51\n68\n" in
+       outputs "raylib, bindings read from the header" "programs/raylib-imported.flan" out;
+       (* At -O0 too, for the reason the rest of the table is: every struct
+          here crosses as (addr v) on a local, which is the alloca mem2reg
+          would launder before anyone noticed it was wrong. *)
+       outputs ~opt:"-O0" "raylib, bindings read from the header, -O0"
+         "programs/raylib-imported.flan" out
+     | _ ->
+       print_endline
+         "acceptance: skipping the imported-bindings case (FLAN_RAYLIB_H unset)");
+
     (* raylib's Image family, headless, and the strongest FFI case here: an
        Image is pixels in RAM, so raylib *computes* with it rather than
        storing and returning it.