diff --git a/include/ada/url_pattern.h b/include/ada/url_pattern.h
index 0cfe46c6f..2bd1f6552 100644
--- a/include/ada/url_pattern.h
+++ b/include/ada/url_pattern.h
@@ -42,15 +42,15 @@ enum class url_pattern_part_type : uint8_t {
 
 enum class url_pattern_part_modifier : uint8_t {
   // The part does not have a modifier.
-  NONE,
+  none,
   // The part has an optional modifier indicated by the U+003F (?) code point.
-  OPTIONAL,
+  optional,
   // The part has a "zero or more" modifier indicated by the U+002A (*) code
   // point.
-  ZERO_OR_MORE,
+  zero_or_more,
   // The part has a "one or more" modifier indicated by the U+002B (+) code
   // point.
-  ONE_OR_MORE,
+  one_or_more,
 };
 
 // @see https://urlpattern.spec.whatwg.org/#part
diff --git a/include/ada/url_pattern_helpers-inl.h b/include/ada/url_pattern_helpers-inl.h
index cc9e2a93f..74ddb5e4c 100644
--- a/include/ada/url_pattern_helpers-inl.h
+++ b/include/ada/url_pattern_helpers-inl.h
@@ -425,13 +425,13 @@ inline ada_warn_unused std::optional<errors>
 Tokenizer::process_tokenizing_error(size_t next_position,
                                     size_t value_position) {
   // If tokenizer’s policy is "strict", then throw a TypeError.
-  if (policy == token_policy::STRICT) {
+  if (policy == token_policy::strict) {
     ada_log("process_tokenizing_error failed with next_position=",
             next_position, " value_position=", value_position);
     return errors::type_error;
   }
   // Assert: tokenizer’s policy is "lenient".
-  ADA_ASSERT_TRUE(policy == token_policy::LENIENT);
+  ADA_ASSERT_TRUE(policy == token_policy::lenient);
   // Run add a token with default length given tokenizer, "invalid-char", next
   // position, and value position.
   add_token_with_default_length(token_type::INVALID_CHAR, next_position,
@@ -535,7 +535,7 @@ url_pattern_parser<F>::maybe_add_part_from_the_pending_fixed_value() {
   // Append part to parser’s part list.
   parts.emplace_back(url_pattern_part_type::FIXED_TEXT,
                      std::move(*encoded_value),
-                     url_pattern_part_modifier::NONE);
+                     url_pattern_part_modifier::none);
   return std::nullopt;
 }
 
@@ -544,26 +544,26 @@ std::optional<errors> url_pattern_parser<F>::add_part(
     std::string_view prefix, token* name_token, token* regexp_or_wildcard_token,
     std::string_view suffix, token* modifier_token) {
   // Let modifier be "none".
-  auto modifier = url_pattern_part_modifier::NONE;
+  auto modifier = url_pattern_part_modifier::none;
   // If modifier token is not null:
   if (modifier_token) {
     // If modifier token’s value is "?" then set modifier to "optional".
     if (modifier_token->value == "?") {
-      modifier = url_pattern_part_modifier::OPTIONAL;
+      modifier = url_pattern_part_modifier::optional;
     } else if (modifier_token->value == "*") {
       // Otherwise if modifier token’s value is "*" then set modifier to
       // "zero-or-more".
-      modifier = url_pattern_part_modifier::ZERO_OR_MORE;
+      modifier = url_pattern_part_modifier::zero_or_more;
     } else if (modifier_token->value == "+") {
       // Otherwise if modifier token’s value is "+" then set modifier to
       // "one-or-more".
-      modifier = url_pattern_part_modifier::ONE_OR_MORE;
+      modifier = url_pattern_part_modifier::one_or_more;
     }
   }
   // If name token is null and regexp or wildcard token is null and modifier
   // is "none":
   if (!name_token && !regexp_or_wildcard_token &&
-      modifier == url_pattern_part_modifier::NONE) {
+      modifier == url_pattern_part_modifier::none) {
     // Append prefix to the end of parser’s pending fixed value.
     pending_fixed_value.append(prefix);
     return std::nullopt;
@@ -668,7 +668,7 @@ tl::expected<std::vector<url_pattern_part>, errors> parse_pattern_string(
       encoding_callback, generate_segment_wildcard_regexp(options));
   // Set parser’s token list to the result of running tokenize given input and
   // "strict".
-  auto tokenize_result = tokenize(input, token_policy::STRICT);
+  auto tokenize_result = tokenize(input, token_policy::strict);
   if (!tokenize_result) {
     ada_log("parse_pattern_string tokenize failed");
     return tl::unexpected(tokenize_result.error());
@@ -828,7 +828,7 @@ constructor_string_parser<regex_provider>::parse(std::string_view input) {
   ada_log("constructor_string_parser::parse input=", input);
   // Let parser be a new constructor string parser whose input is input and
   // token list is the result of running tokenize given input and "lenient".
-  auto token_list = tokenize(input, token_policy::LENIENT);
+  auto token_list = tokenize(input, token_policy::lenient);
   if (!token_list) {
     return tl::unexpected(token_list.error());
   }
diff --git a/include/ada/url_pattern_helpers.h b/include/ada/url_pattern_helpers.h
index b9c6edf4b..53c710da5 100644
--- a/include/ada/url_pattern_helpers.h
+++ b/include/ada/url_pattern_helpers.h
@@ -37,8 +37,8 @@ std::string to_string(token_type type);
 
 // @see https://urlpattern.spec.whatwg.org/#tokenize-policy
 enum class token_policy {
-  STRICT,
-  LENIENT,
+  strict,
+  lenient,
 };
 
 // @see https://urlpattern.spec.whatwg.org/#tokens
diff --git a/src/url_pattern_helpers.cpp b/src/url_pattern_helpers.cpp
index 306e67196..7ee205e45 100644
--- a/src/url_pattern_helpers.cpp
+++ b/src/url_pattern_helpers.cpp
@@ -22,7 +22,7 @@ generate_regular_expression_and_name_list(
     // If part's type is "fixed-text":
     if (part.type == url_pattern_part_type::FIXED_TEXT) {
       // If part's modifier is "none"
-      if (part.modifier == url_pattern_part_modifier::NONE) {
+      if (part.modifier == url_pattern_part_modifier::none) {
         // Append the result of running escape a regexp string given part's
         // value
         result += escape_regexp_string(part.value);
@@ -68,8 +68,8 @@ generate_regular_expression_and_name_list(
     // string
     if (part.prefix.empty() && part.suffix.empty()) {
       // If part's modifier is "none" or "optional"
-      if (part.modifier == url_pattern_part_modifier::NONE ||
-          part.modifier == url_pattern_part_modifier::OPTIONAL) {
+      if (part.modifier == url_pattern_part_modifier::none ||
+          part.modifier == url_pattern_part_modifier::optional) {
         // (<regexp value>)<modifier>
         result += "(" + regexp_value + ")" +
                   convert_modifier_to_string(part.modifier);
@@ -82,8 +82,8 @@ generate_regular_expression_and_name_list(
     }
 
     // If part's modifier is "none" or "optional"
-    if (part.modifier == url_pattern_part_modifier::NONE ||
-        part.modifier == url_pattern_part_modifier::OPTIONAL) {
+    if (part.modifier == url_pattern_part_modifier::none ||
+        part.modifier == url_pattern_part_modifier::optional) {
       // (?:<prefix>(<regexp value>)<suffix>)<modifier>
       result += "(?:" + escape_regexp_string(part.prefix) + "(" + regexp_value +
                 ")" + escape_regexp_string(part.suffix) + ")" +
@@ -92,8 +92,8 @@ generate_regular_expression_and_name_list(
     }
 
     // Assert: part's modifier is "zero-or-more" or "one-or-more"
-    ADA_ASSERT_TRUE(part.modifier == url_pattern_part_modifier::ZERO_OR_MORE ||
-                    part.modifier == url_pattern_part_modifier::ONE_OR_MORE);
+    ADA_ASSERT_TRUE(part.modifier == url_pattern_part_modifier::zero_or_more ||
+                    part.modifier == url_pattern_part_modifier::one_or_more);
 
     // Assert: part's prefix is not the empty string or part's suffix is not the
     // empty string
@@ -131,7 +131,7 @@ generate_regular_expression_and_name_list(
     result.append(")");
 
     // If part's modifier is "zero-or-more" then append "?" to the end of result
-    if (part.modifier == url_pattern_part_modifier::ZERO_OR_MORE) {
+    if (part.modifier == url_pattern_part_modifier::zero_or_more) {
       result += "?";
     }
   }
@@ -162,13 +162,13 @@ std::string convert_modifier_to_string(url_pattern_part_modifier modifier) {
   // TODO: Optimize this.
   switch (modifier) {
       // If modifier is "zero-or-more", then return "*".
-    case url_pattern_part_modifier::ZERO_OR_MORE:
+    case url_pattern_part_modifier::zero_or_more:
       return "*";
     // If modifier is "optional", then return "?".
-    case url_pattern_part_modifier::OPTIONAL:
+    case url_pattern_part_modifier::optional:
       return "?";
     // If modifier is "one-or-more", then return "+".
-    case url_pattern_part_modifier::ONE_OR_MORE:
+    case url_pattern_part_modifier::one_or_more:
       return "+";
     // Return the empty string.
     default:
@@ -855,7 +855,7 @@ std::string generate_pattern_string(
     // If part’s type is "fixed-text" then:
     if (part.type == url_pattern_part_type::FIXED_TEXT) {
       // If part’s modifier is "none" then:
-      if (part.modifier == url_pattern_part_modifier::NONE) {
+      if (part.modifier == url_pattern_part_modifier::none) {
         // Append the result of running escape a pattern string given part’s
         // value to the end of result.
         result.append(escape_pattern_string(part.value));
@@ -895,7 +895,7 @@ std::string generate_pattern_string(
     // - next part’s suffix is the empty string
     if (!needs_grouping && custom_name &&
         part.type == url_pattern_part_type::SEGMENT_WILDCARD &&
-        part.modifier == url_pattern_part_modifier::NONE &&
+        part.modifier == url_pattern_part_modifier::none &&
         next_part.has_value() && next_part->prefix.empty() &&
         next_part->suffix.empty()) {
       // If next part’s type is "fixed-text":
@@ -978,7 +978,7 @@ std::string generate_pattern_string(
       if (!custom_name &&
           (!previous_part.has_value() ||
            previous_part->type == url_pattern_part_type::FIXED_TEXT ||
-           previous_part->modifier != url_pattern_part_modifier::NONE ||
+           previous_part->modifier != url_pattern_part_modifier::none ||
            needs_grouping || !part.prefix.empty())) {
         result.append("*");
       } else {
diff --git a/tests/wpt_urlpattern_tests.cpp b/tests/wpt_urlpattern_tests.cpp
index e01094722..bf2bb0bff 100644
--- a/tests/wpt_urlpattern_tests.cpp
+++ b/tests/wpt_urlpattern_tests.cpp
@@ -43,7 +43,7 @@ TEST(wpt_urlpattern_tests, test_regex_difference) {
 
 TEST(wpt_urlpattern_tests, parser_tokenize_basic_tests) {
   auto tokenize_result =
-      tokenize("*", ada::url_pattern_helpers::token_policy::STRICT);
+      tokenize("*", ada::url_pattern_helpers::token_policy::strict);
   ASSERT_TRUE(tokenize_result);
 }