diff --git a/exercises/practice/protein-translation/test/protein_translation_test.exs b/exercises/practice/protein-translation/test/protein_translation_test.exs
index 38f42840f..b736c8cd3 100644
--- a/exercises/practice/protein-translation/test/protein_translation_test.exs
+++ b/exercises/practice/protein-translation/test/protein_translation_test.exs
@@ -139,12 +139,6 @@ defmodule ProteinTranslationTest do
       assert ProteinTranslation.of_rna(strand) == {:error, "invalid RNA"}
     end
 
-    @tag :pending
-    test "known amino acids, but invalid codon, invalid RNA" do
-      strand = "AAA"
-      assert ProteinTranslation.of_rna(strand) == {:error, "invalid RNA"}
-    end
-
     @tag :pending
     test "unknown amino acids, not part of a codon, invalid RNA" do
       strand = "XYZ"