diff --git a/include/fmt/std.h b/include/fmt/std.h
index 544ec541..4b22eda1 100644
--- a/include/fmt/std.h
+++ b/include/fmt/std.h
@@ -125,7 +125,7 @@ struct formatter<std::optional<T>, Char,
   template <typename FormatContext>
   auto format(std::optional<T> const& opt, FormatContext& ctx) const
       -> decltype(ctx.out()) {
-    if (not opt) return detail::write<Char>(ctx.out(), none);
+    if (!opt) return detail::write<Char>(ctx.out(), none);
 
     auto out = ctx.out();
     out = detail::write<Char>(out, optional);
diff --git a/test/std-test.cc b/test/std-test.cc
index a5a4dcc6..f30c514b 100644
--- a/test/std-test.cc
+++ b/test/std-test.cc
@@ -59,8 +59,7 @@ TEST(std_test, optional) {
                                           std::optional{3}}),
             "[optional(1), optional(2), optional(3)]");
   EXPECT_EQ(
-      fmt::format("{}", std::optional<std::optional<const char*>>{std::optional{
-                            "nested"}}),
+      fmt::format("{}", std::optional<std::optional<const char*>>{{"nested"}}),
       "optional(optional(\"nested\"))");
   EXPECT_EQ(
       fmt::format("{:<{}}", std::optional{std::string{"left aligned"}}, 30),