fix flaky test relying on application env

test/makeup/lexers/elixir_lexer/elixir_lexer_sigil_lexer_test.exs

@@ -0,0 +1,24 @@
+defmodule ElixirLexerSigilLexerTest do
+  use ExUnit.Case, async: false
+  import Makeup.Lexers.ElixirLexer.Testing, only: [lex: 1]
+
+  describe "custom lexers for sigils" do
+    test "can register a custom lexer" do
+      defmodule MyCustomLexer do
+        def lex(input) do
+          [{:keyword, %{}, input}]
+        end
+      end
+
+      Makeup.Lexers.ElixirLexer.register_sigil_lexer("H", MyCustomLexer)
+
+      assert lex("~H|Hello, world!|") == [
+               {:string_sigil, %{}, "~H|"},
+               {:keyword, %{}, "Hello, world!"},
+               {:string_sigil, %{}, "|"}
+             ]
+    after
+      Application.put_env(:makeup_elixir, :sigil_lexers, %{})
+    end
+  end
+end

test/makeup/lexers/elixir_lexer/elixir_lexer_tokenizer_test.exs

@@ -695,22 +695,4 @@ defmodule ElixirLexerTokenizerTestSnippet do
              {:punctuation, %{group_id: "group-1"}, "}"}
            ]
   end
-
-  describe "custom lexers for sigils" do
-    test "can register a custom lexer" do
-      defmodule MyCustomLexer do
-        def lex(input) do
-          [{:keyword, %{}, input}]
-        end
-      end
-
-      Makeup.Lexers.ElixirLexer.register_sigil_lexer("H", MyCustomLexer)
-
-      assert lex("~H|Hello, world!|") == [
-               {:string_sigil, %{}, "~H|"},
-               {:keyword, %{}, "Hello, world!"},
-               {:string_sigil, %{}, "|"}
-             ]
-    end
-  end
 end