diff --git a/include/fmt/compile.h b/include/fmt/compile.h
index fac475be..da3f054f 100644
--- a/include/fmt/compile.h
+++ b/include/fmt/compile.h
@@ -135,333 +135,6 @@ const T& first(const T& value, const Tail&...) {
   return value;
 }
 
-// Part of a compiled format string. It can be either literal text or a
-// replacement field.
-template <typename Char> struct format_part {
-  enum class kind { arg_index, arg_name, text, replacement };
-
-  struct replacement {
-    arg_ref<Char> arg_id;
-    dynamic_format_specs<Char> specs;
-  };
-
-  kind part_kind;
-  union value {
-    int arg_index;
-    basic_string_view<Char> str;
-    replacement repl;
-
-    FMT_CONSTEXPR value(int index = 0) : arg_index(index) {}
-    FMT_CONSTEXPR value(basic_string_view<Char> s) : str(s) {}
-    FMT_CONSTEXPR value(replacement r) : repl(r) {}
-  } val;
-  // Position past the end of the argument id.
-  const Char* arg_id_end = nullptr;
-
-  FMT_CONSTEXPR format_part(kind k = kind::arg_index, value v = {})
-      : part_kind(k), val(v) {}
-
-  static FMT_CONSTEXPR format_part make_arg_index(int index) {
-    return format_part(kind::arg_index, index);
-  }
-  static FMT_CONSTEXPR format_part make_arg_name(basic_string_view<Char> name) {
-    return format_part(kind::arg_name, name);
-  }
-  static FMT_CONSTEXPR format_part make_text(basic_string_view<Char> text) {
-    return format_part(kind::text, text);
-  }
-  static FMT_CONSTEXPR format_part make_replacement(replacement repl) {
-    return format_part(kind::replacement, repl);
-  }
-};
-
-template <typename Char> struct part_counter {
-  unsigned num_parts = 0;
-
-  FMT_CONSTEXPR void on_text(const Char* begin, const Char* end) {
-    if (begin != end) ++num_parts;
-  }
-
-  FMT_CONSTEXPR int on_arg_id() { return ++num_parts, 0; }
-  FMT_CONSTEXPR int on_arg_id(int) { return ++num_parts, 0; }
-  FMT_CONSTEXPR int on_arg_id(basic_string_view<Char>) {
-    return ++num_parts, 0;
-  }
-
-  FMT_CONSTEXPR void on_replacement_field(int, const Char*) {}
-
-  FMT_CONSTEXPR const Char* on_format_specs(int, const Char* begin,
-                                            const Char* end) {
-    // Find the matching brace.
-    unsigned brace_counter = 0;
-    for (; begin != end; ++begin) {
-      if (*begin == '{') {
-        ++brace_counter;
-      } else if (*begin == '}') {
-        if (brace_counter == 0u) break;
-        --brace_counter;
-      }
-    }
-    return begin;
-  }
-
-  FMT_CONSTEXPR void on_error(const char*) {}
-};
-
-// Counts the number of parts in a format string.
-template <typename Char>
-FMT_CONSTEXPR unsigned count_parts(basic_string_view<Char> format_str) {
-  part_counter<Char> counter;
-  parse_format_string<true>(format_str, counter);
-  return counter.num_parts;
-}
-
-template <typename Char, typename PartHandler>
-class format_string_compiler : public error_handler {
- private:
-  using part = format_part<Char>;
-
-  PartHandler handler_;
-  part part_;
-  basic_string_view<Char> format_str_;
-  basic_format_parse_context<Char> parse_context_;
-
- public:
-  FMT_CONSTEXPR format_string_compiler(basic_string_view<Char> format_str,
-                                       PartHandler handler)
-      : handler_(handler),
-        format_str_(format_str),
-        parse_context_(format_str) {}
-
-  FMT_CONSTEXPR void on_text(const Char* begin, const Char* end) {
-    if (begin != end)
-      handler_(part::make_text({begin, to_unsigned(end - begin)}));
-  }
-
-  FMT_CONSTEXPR int on_arg_id() {
-    part_ = part::make_arg_index(parse_context_.next_arg_id());
-    return 0;
-  }
-
-  FMT_CONSTEXPR int on_arg_id(int id) {
-    parse_context_.check_arg_id(id);
-    part_ = part::make_arg_index(id);
-    return 0;
-  }
-
-  FMT_CONSTEXPR int on_arg_id(basic_string_view<Char> id) {
-    part_ = part::make_arg_name(id);
-    return 0;
-  }
-
-  FMT_CONSTEXPR void on_replacement_field(int, const Char* ptr) {
-    part_.arg_id_end = ptr;
-    handler_(part_);
-  }
-
-  FMT_CONSTEXPR const Char* on_format_specs(int, const Char* begin,
-                                            const Char* end) {
-    auto repl = typename part::replacement();
-    dynamic_specs_handler<basic_format_parse_context<Char>> handler(
-        repl.specs, parse_context_);
-    auto it = parse_format_specs(begin, end, handler);
-    if (*it != '}') on_error("missing '}' in format string");
-    repl.arg_id = part_.part_kind == part::kind::arg_index
-                      ? arg_ref<Char>(part_.val.arg_index)
-                      : arg_ref<Char>(part_.val.str);
-    auto replacement_part = part::make_replacement(repl);
-    replacement_part.arg_id_end = begin;
-    handler_(replacement_part);
-    return it;
-  }
-};
-
-// Compiles a format string and invokes handler(part) for each parsed part.
-template <bool IS_CONSTEXPR, typename Char, typename PartHandler>
-FMT_CONSTEXPR void compile_format_string(basic_string_view<Char> format_str,
-                                         PartHandler handler) {
-  parse_format_string<IS_CONSTEXPR>(
-      format_str,
-      format_string_compiler<Char, PartHandler>(format_str, handler));
-}
-
-template <typename OutputIt, typename Context, typename Id>
-void format_arg(
-    basic_format_parse_context<typename Context::char_type>& parse_ctx,
-    Context& ctx, Id arg_id) {
-  auto arg = ctx.arg(arg_id);
-  if (arg.type() == type::custom_type) {
-    visit_format_arg(custom_formatter<Context>(parse_ctx, ctx), arg);
-  } else {
-    ctx.advance_to(visit_format_arg(
-        default_arg_formatter<OutputIt, typename Context::char_type>{
-            ctx.out(), ctx.args(), ctx.locale()},
-        arg));
-  }
-}
-
-// vformat_to is defined in a subnamespace to prevent ADL.
-namespace cf {
-template <typename Context, typename OutputIt, typename CompiledFormat>
-auto vformat_to(OutputIt out, CompiledFormat& cf,
-                basic_format_args<Context> args) -> typename Context::iterator {
-  using char_type = typename Context::char_type;
-  basic_format_parse_context<char_type> parse_ctx(
-      to_string_view(cf.format_str_));
-  Context ctx(out, args);
-
-  const auto& parts = cf.parts();
-  for (auto part_it = std::begin(parts); part_it != std::end(parts);
-       ++part_it) {
-    const auto& part = *part_it;
-    const auto& value = part.val;
-
-    using format_part_t = format_part<char_type>;
-    switch (part.part_kind) {
-    case format_part_t::kind::text: {
-      const auto text = value.str;
-      auto output = ctx.out();
-      auto&& it = reserve(output, text.size());
-      it = std::copy_n(text.begin(), text.size(), it);
-      ctx.advance_to(output);
-      break;
-    }
-
-    case format_part_t::kind::arg_index:
-      advance_to(parse_ctx, part.arg_id_end);
-      detail::format_arg<OutputIt>(parse_ctx, ctx, value.arg_index);
-      break;
-
-    case format_part_t::kind::arg_name:
-      advance_to(parse_ctx, part.arg_id_end);
-      detail::format_arg<OutputIt>(parse_ctx, ctx, value.str);
-      break;
-
-    case format_part_t::kind::replacement: {
-      const auto& arg_id_value = value.repl.arg_id.val;
-      const auto arg = value.repl.arg_id.kind == arg_id_kind::index
-                           ? ctx.arg(arg_id_value.index)
-                           : ctx.arg(arg_id_value.name);
-
-      auto specs = value.repl.specs;
-
-      handle_dynamic_spec<width_checker>(specs.width, specs.width_ref, ctx);
-      handle_dynamic_spec<precision_checker>(specs.precision,
-                                             specs.precision_ref, ctx);
-
-      error_handler h;
-      numeric_specs_checker<error_handler> checker(h, arg.type());
-      if (specs.align == align::numeric) checker.require_numeric_argument();
-      if (specs.sign != sign::none) checker.check_sign();
-      if (specs.alt) checker.require_numeric_argument();
-      if (specs.precision >= 0) checker.check_precision();
-
-      advance_to(parse_ctx, part.arg_id_end);
-      ctx.advance_to(visit_format_arg(
-          arg_formatter<OutputIt, typename Context::char_type>(ctx, specs),
-          arg));
-      break;
-    }
-    }
-  }
-  return ctx.out();
-}
-}  // namespace cf
-
-struct basic_compiled_format {};
-
-template <typename S, typename = void>
-struct compiled_format_base : basic_compiled_format {
-  using char_type = char_t<S>;
-  using parts_container = std::vector<detail::format_part<char_type>>;
-
-  parts_container compiled_parts;
-
-  explicit compiled_format_base(basic_string_view<char_type> format_str) {
-    compile_format_string<false>(format_str,
-                                 [this](const format_part<char_type>& part) {
-                                   compiled_parts.push_back(part);
-                                 });
-  }
-
-  const parts_container& parts() const { return compiled_parts; }
-};
-
-template <typename Char, unsigned N> struct format_part_array {
-  format_part<Char> data[N] = {};
-  FMT_CONSTEXPR format_part_array() = default;
-};
-
-template <typename Char, unsigned N>
-FMT_CONSTEXPR format_part_array<Char, N> compile_to_parts(
-    basic_string_view<Char> format_str) {
-  format_part_array<Char, N> parts;
-  unsigned counter = 0;
-  // This is not a lambda for compatibility with older compilers.
-  struct {
-    format_part<Char>* parts;
-    unsigned* counter;
-    FMT_CONSTEXPR void operator()(const format_part<Char>& part) {
-      parts[(*counter)++] = part;
-    }
-  } collector{parts.data, &counter};
-  compile_format_string<true>(format_str, collector);
-  if (counter < N) {
-    parts.data[counter] =
-        format_part<Char>::make_text(basic_string_view<Char>());
-  }
-  return parts;
-}
-
-template <typename T> constexpr const T& constexpr_max(const T& a, const T& b) {
-  return (a < b) ? b : a;
-}
-
-template <typename S>
-struct compiled_format_base<S, enable_if_t<is_compile_string<S>::value>>
-    : basic_compiled_format {
-  using char_type = char_t<S>;
-
-  FMT_CONSTEXPR explicit compiled_format_base(basic_string_view<char_type>) {}
-
-// Workaround for old compilers. Format string compilation will not be
-// performed there anyway.
-#if FMT_USE_CONSTEXPR
-  static FMT_CONSTEXPR_DECL const unsigned num_format_parts =
-      constexpr_max(count_parts(to_string_view(S())), 1u);
-#else
-  static const unsigned num_format_parts = 1;
-#endif
-
-  using parts_container = format_part<char_type>[num_format_parts];
-
-  const parts_container& parts() const {
-    static FMT_CONSTEXPR_DECL const auto compiled_parts =
-        compile_to_parts<char_type, num_format_parts>(
-            detail::to_string_view(S()));
-    return compiled_parts.data;
-  }
-};
-
-template <typename S, typename... Args>
-class compiled_format : private compiled_format_base<S> {
- public:
-  using typename compiled_format_base<S>::char_type;
-
- private:
-  basic_string_view<char_type> format_str_;
-
-  template <typename Context, typename OutputIt, typename CompiledFormat>
-  friend auto cf::vformat_to(OutputIt out, CompiledFormat& cf,
-                             basic_format_args<Context> args) ->
-      typename Context::iterator;
-
- public:
-  compiled_format() = delete;
-  explicit constexpr compiled_format(basic_string_view<char_type> format_str)
-      : compiled_format_base<S>(format_str), format_str_(format_str) {}
-};
-
 #ifdef __cpp_if_constexpr
 template <typename... Args> struct type_list {};
 
@@ -826,12 +499,6 @@ constexpr auto compile(S format_str) {
     return result;
   }
 }
-#else
-template <typename... Args, typename S,
-          FMT_ENABLE_IF(is_compile_string<S>::value)>
-constexpr auto compile(S format_str) -> detail::compiled_format<S, Args...> {
-  return detail::compiled_format<S, Args...>(to_string_view(format_str));
-}
 #endif  // __cpp_if_constexpr
 }  // namespace detail
 
@@ -855,13 +522,11 @@ constexpr OutputIt format_to(OutputIt out, const CompiledFormat& cf,
                              const Args&... args) {
   return cf.format(out, args...);
 }
-#endif  // __cpp_if_constexpr
 
 template <typename S, typename... Args,
           FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
 FMT_INLINE std::basic_string<typename S::char_type> format(const S&,
                                                            Args&&... args) {
-#ifdef __cpp_if_constexpr
   if constexpr (std::is_same<typename S::char_type, char>::value) {
     constexpr basic_string_view<typename S::char_type> str = S();
     if constexpr (str.size() == 2 && str[0] == '{' && str[1] == '}') {
@@ -874,9 +539,7 @@ FMT_INLINE std::basic_string<typename S::char_type> format(const S&,
       }
     }
   }
-#endif
   constexpr auto compiled = detail::compile<Args...>(S());
-#ifdef __cpp_if_constexpr
   if constexpr (std::is_same<remove_cvref_t<decltype(compiled)>,
                              detail::unknown_format>()) {
     return format(static_cast<basic_string_view<typename S::char_type>>(S()),
@@ -884,16 +547,12 @@ FMT_INLINE std::basic_string<typename S::char_type> format(const S&,
   } else {
     return format(compiled, std::forward<Args>(args)...);
   }
-#else
-  return format(compiled, std::forward<Args>(args)...);
-#endif
 }
 
 template <typename OutputIt, typename S, typename... Args,
           FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
 FMT_CONSTEXPR OutputIt format_to(OutputIt out, const S&, Args&&... args) {
   constexpr auto compiled = detail::compile<Args...>(S());
-#ifdef __cpp_if_constexpr
   if constexpr (std::is_same<remove_cvref_t<decltype(compiled)>,
                              detail::unknown_format>()) {
     return format_to(out,
@@ -902,10 +561,8 @@ FMT_CONSTEXPR OutputIt format_to(OutputIt out, const S&, Args&&... args) {
   } else {
     return format_to(out, compiled, std::forward<Args>(args)...);
   }
-#else
-  return format_to(out, compiled, std::forward<Args>(args)...);
-#endif
 }
+#endif
 
 template <typename OutputIt, typename S, typename... Args,
           FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
diff --git a/test/compile-test.cc b/test/compile-test.cc
index cbdc4613..4ff6d5f2 100644
--- a/test/compile-test.cc
+++ b/test/compile-test.cc
@@ -5,49 +5,38 @@
 //
 // For the license information refer to format.h.
 
-#include <string>
+#include "fmt/compile.h"
+
 #include <type_traits>
 
-// Check that fmt/compile.h compiles with windows.h included before it.
-#ifdef _WIN32
-#  include <windows.h>
-#endif
-
 #include "fmt/chrono.h"
-#include "fmt/compile.h"
 #include "gmock/gmock.h"
-#include "gtest-extra.h"
-#include "util.h"
 
-TEST(IteratorTest, TruncatingIterator) {
+TEST(iterator_test, truncating_iterator) {
   char* p = nullptr;
-  fmt::detail::truncating_iterator<char*> it(p, 3);
+  auto it = fmt::detail::truncating_iterator<char*>(p, 3);
   auto prev = it++;
   EXPECT_EQ(prev.base(), p);
   EXPECT_EQ(it.base(), p + 1);
 }
 
-TEST(IteratorTest, TruncatingIteratorDefaultConstruct) {
-  static_assert(std::is_default_constructible<
-                    fmt::detail::truncating_iterator<char*>>::value,
-                "");
-
-  fmt::detail::truncating_iterator<char*> it;
+TEST(iterator_test, truncating_iterator_default_construct) {
+  auto it = fmt::detail::truncating_iterator<char*>();
   EXPECT_EQ(nullptr, it.base());
   EXPECT_EQ(std::size_t{0}, it.count());
 }
 
 #ifdef __cpp_lib_ranges
-TEST(IteratorTest, TruncatingIteratorOutputIterator) {
+TEST(iterator_test, truncating_iterator_is_output_iterator) {
   static_assert(
       std::output_iterator<fmt::detail::truncating_iterator<char*>, char>);
 }
 #endif
 
-TEST(IteratorTest, TruncatingBackInserter) {
-  std::string buffer;
+TEST(iterator_test, truncating_back_inserter) {
+  auto buffer = std::string();
   auto bi = std::back_inserter(buffer);
-  fmt::detail::truncating_iterator<decltype(bi)> it(bi, 2);
+  auto it = fmt::detail::truncating_iterator<decltype(bi)>(bi, 2);
   *it++ = '4';
   *it++ = '2';
   *it++ = '1';
@@ -55,37 +44,6 @@ TEST(IteratorTest, TruncatingBackInserter) {
   EXPECT_EQ(buffer, "42");
 }
 
-// compiletime_prepared_parts_type_provider is useful only with relaxed
-// constexpr.
-#if FMT_USE_CONSTEXPR
-template <unsigned EXPECTED_PARTS_COUNT, typename Format>
-void check_prepared_parts_type(Format format) {
-  typedef fmt::detail::compiled_format_base<decltype(format)> provider;
-  typedef fmt::detail::format_part<char>
-      expected_parts_type[EXPECTED_PARTS_COUNT];
-  static_assert(std::is_same<typename provider::parts_container,
-                             expected_parts_type>::value,
-                "CompileTimePreparedPartsTypeProvider test failed");
-}
-
-TEST(CompileTest, CompileTimePreparedPartsTypeProvider) {
-  check_prepared_parts_type<1u>(FMT_STRING("text"));
-  check_prepared_parts_type<1u>(FMT_STRING("{}"));
-  check_prepared_parts_type<2u>(FMT_STRING("text{}"));
-  check_prepared_parts_type<2u>(FMT_STRING("{}text"));
-  check_prepared_parts_type<3u>(FMT_STRING("text{}text"));
-  check_prepared_parts_type<3u>(FMT_STRING("{:{}.{}} {:{}}"));
-
-  check_prepared_parts_type<3u>(FMT_STRING("{{{}}}"));   // '{', 'argument', '}'
-  check_prepared_parts_type<2u>(FMT_STRING("text{{"));   // 'text', '{'
-  check_prepared_parts_type<3u>(FMT_STRING("text{{ "));  // 'text', '{', ' '
-  check_prepared_parts_type<2u>(FMT_STRING("}}text"));   // '}', text
-  check_prepared_parts_type<2u>(FMT_STRING("text}}text"));  // 'text}', 'text'
-  check_prepared_parts_type<4u>(
-      FMT_STRING("text{{}}text"));  // 'text', '{', '}', 'text'
-}
-#endif
-
 struct test_formattable {};
 
 FMT_BEGIN_NAMESPACE
@@ -97,14 +55,14 @@ template <> struct formatter<test_formattable> : formatter<const char*> {
 };
 FMT_END_NAMESPACE
 
-TEST(CompileTest, CompileFallback) {
+TEST(compile_test, compile_fallback) {
   // FMT_COMPILE should fallback on runtime formatting when `if constexpr` is
   // not available.
   EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42));
 }
 
 #ifdef __cpp_if_constexpr
-TEST(CompileTest, FormatDefault) {
+TEST(compile_test, format_default) {
   EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42));
   EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42u));
   EXPECT_EQ("42", fmt::format(FMT_COMPILE("{}"), 42ll));
@@ -120,18 +78,18 @@ TEST(CompileTest, FormatDefault) {
 #  endif
 }
 
-TEST(CompileTest, FormatWideString) {
+TEST(compile_test, format_wide_string) {
   EXPECT_EQ(L"42", fmt::format(FMT_COMPILE(L"{}"), 42));
 }
 
-TEST(CompileTest, FormatSpecs) {
+TEST(compile_test, format_specs) {
   EXPECT_EQ("42", fmt::format(FMT_COMPILE("{:x}"), 0x42));
   EXPECT_EQ("1.2 ms ",
             fmt::format(FMT_COMPILE("{:7.1%Q %q}"),
                         std::chrono::duration<double, std::milli>(1.234)));
 }
 
-TEST(CompileTest, DynamicFormatSpecs) {
+TEST(compile_test, dynamic_format_specs) {
   EXPECT_EQ("foo  ", fmt::format(FMT_COMPILE("{:{}}"), "foo", 5));
   EXPECT_EQ("  3.14", fmt::format(FMT_COMPILE("{:{}.{}f}"), 3.141592, 6, 2));
   EXPECT_EQ(
@@ -140,7 +98,7 @@ TEST(CompileTest, DynamicFormatSpecs) {
                   std::chrono::duration<double, std::milli>(1.234), 9, 3));
 }
 
-TEST(CompileTest, ManualOrdering) {
+TEST(compile_test, manual_ordering) {
   EXPECT_EQ("42", fmt::format(FMT_COMPILE("{0}"), 42));
   EXPECT_EQ(" -42", fmt::format(FMT_COMPILE("{0:4}"), -42));
   EXPECT_EQ("41 43", fmt::format(FMT_COMPILE("{0} {1}"), 41, 43));
@@ -157,7 +115,7 @@ TEST(CompileTest, ManualOrdering) {
   EXPECT_EQ(L"42", fmt::format(FMT_COMPILE(L"{0}"), 42));
 }
 
-TEST(CompileTest, Named) {
+TEST(compile_test, named) {
   auto runtime_named_field_compiled =
       fmt::detail::compile<decltype(fmt::arg("arg", 42))>(FMT_COMPILE("{arg}"));
   static_assert(std::is_same_v<decltype(runtime_named_field_compiled),
@@ -205,7 +163,7 @@ TEST(CompileTest, Named) {
 #  endif
 }
 
-TEST(CompileTest, FormatTo) {
+TEST(compile_test, format_to) {
   char buf[8];
   auto end = fmt::format_to(buf, FMT_COMPILE("{}"), 42);
   *end = '\0';
@@ -215,7 +173,7 @@ TEST(CompileTest, FormatTo) {
   EXPECT_STREQ("2a", buf);
 }
 
-TEST(CompileTest, FormatToNWithCompileMacro) {
+TEST(compile_test, format_to_n) {
   constexpr auto buffer_size = 8;
   char buffer[buffer_size];
   auto res = fmt::format_to_n(buffer, buffer_size, FMT_COMPILE("{}"), 42);
@@ -226,17 +184,17 @@ TEST(CompileTest, FormatToNWithCompileMacro) {
   EXPECT_STREQ("2a", buffer);
 }
 
-TEST(CompileTest, FormattedSizeWithCompileMacro) {
+TEST(compile_test, formatted_size) {
   EXPECT_EQ(2, fmt::formatted_size(FMT_COMPILE("{0}"), 42));
   EXPECT_EQ(5, fmt::formatted_size(FMT_COMPILE("{0:<4.2f}"), 42.0));
 }
 
-TEST(CompileTest, TextAndArg) {
+TEST(compile_test, text_and_arg) {
   EXPECT_EQ(">>>42<<<", fmt::format(FMT_COMPILE(">>>{}<<<"), 42));
   EXPECT_EQ("42!", fmt::format(FMT_COMPILE("{}!"), 42));
 }
 
-TEST(CompileTest, UnknownFormatFallback) {
+TEST(compile_test, unknown_format_fallback) {
   EXPECT_EQ(" 42 ",
             fmt::format(FMT_COMPILE("{name:^4}"), fmt::arg("name", 42)));
 
@@ -253,7 +211,7 @@ TEST(CompileTest, UnknownFormatFallback) {
   EXPECT_EQ(" 42 ", fmt::string_view(buffer, 4));
 }
 
-TEST(CompileTest, Empty) { EXPECT_EQ("", fmt::format(FMT_COMPILE(""))); }
+TEST(compile_test, empty) { EXPECT_EQ("", fmt::format(FMT_COMPILE(""))); }
 
 struct to_stringable {
   friend fmt::string_view to_string_view(to_stringable) { return {}; }
@@ -272,13 +230,13 @@ template <> struct formatter<to_stringable> {
 };
 FMT_END_NAMESPACE
 
-TEST(CompileTest, ToStringAndFormatter) {
+TEST(compile_test, to_string_and_formatter) {
   fmt::format(FMT_COMPILE("{}"), to_stringable());
 }
 #endif
 
 #if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
-TEST(CompileTest, CompileFormatStringLiteral) {
+TEST(compile_test, compile_format_string_literal) {
   using namespace fmt::literals;
   EXPECT_EQ("", fmt::format(""_cf));
   EXPECT_EQ("42", fmt::format("{}"_cf, 42));
@@ -302,14 +260,14 @@ consteval auto test_format(auto format, const Args&... args) {
   return string;
 }
 
-TEST(CompileTimeFormattingTest, Bool) {
+TEST(compile_time_formatting_test, bool) {
   EXPECT_EQ("true", test_format<5>(FMT_COMPILE("{}"), true));
   EXPECT_EQ("false", test_format<6>(FMT_COMPILE("{}"), false));
   EXPECT_EQ("true ", test_format<6>(FMT_COMPILE("{:5}"), true));
   EXPECT_EQ("1", test_format<2>(FMT_COMPILE("{:d}"), true));
 }
 
-TEST(CompileTimeFormattingTest, Integer) {
+TEST(compile_time_formatting_test, integer) {
   EXPECT_EQ("42", test_format<3>(FMT_COMPILE("{}"), 42));
   EXPECT_EQ("420", test_format<4>(FMT_COMPILE("{}"), 420));
   EXPECT_EQ("42 42", test_format<6>(FMT_COMPILE("{} {}"), 42, 42));
@@ -339,14 +297,14 @@ TEST(CompileTimeFormattingTest, Integer) {
   EXPECT_EQ("**-42", test_format<6>(FMT_COMPILE("{:*>5}"), -42));
 }
 
-TEST(CompileTimeFormattingTest, Char) {
+TEST(compile_time_formatting_test, char) {
   EXPECT_EQ("c", test_format<2>(FMT_COMPILE("{}"), 'c'));
 
   EXPECT_EQ("c  ", test_format<4>(FMT_COMPILE("{:3}"), 'c'));
   EXPECT_EQ("99", test_format<3>(FMT_COMPILE("{:d}"), 'c'));
 }
 
-TEST(CompileTimeFormattingTest, String) {
+TEST(compile_time_formatting_test, string) {
   EXPECT_EQ("42", test_format<3>(FMT_COMPILE("{}"), "42"));
   EXPECT_EQ("The answer is 42",
             test_format<17>(FMT_COMPILE("{} is {}"), "The answer", "42"));
@@ -355,14 +313,14 @@ TEST(CompileTimeFormattingTest, String) {
   EXPECT_EQ("**🤡**", test_format<9>(FMT_COMPILE("{:*^6}"), "🤡"));
 }
 
-TEST(CompileTimeFormattingTest, Combination) {
+TEST(compile_time_formatting_test, combination) {
   EXPECT_EQ("420, true, answer",
             test_format<18>(FMT_COMPILE("{}, {}, {}"), 420, true, "answer"));
 
   EXPECT_EQ(" -42", test_format<5>(FMT_COMPILE("{:{}}"), -42, 4));
 }
 
-TEST(CompileTimeFormattingTest, MultiByteFill) {
+TEST(compile_time_formatting_test, multibyte_fill) {
   EXPECT_EQ("жж42", test_format<8>(FMT_COMPILE("{:ж>4}"), 42));
 }
 #endif