diff --git a/elixir/test/backend_assurance/prim_eq_char_test.exs b/elixir/test/backend_assurance/prim_eq_char_test.exs
index af32406f..977cd452 100644
--- a/elixir/test/backend_assurance/prim_eq_char_test.exs
+++ b/elixir/test/backend_assurance/prim_eq_char_test.exs
@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: PMPL-1.0-or-later
+# SPDX-License-Identifier: MPL-2.0
 # Copyright (c) 2026 Jonathan D.A. Jewell (hyperpolymath) <j.d.a.jewell@open.ac.uk>
 #
 # Backend-assurance harness for `prim__eqChar`.