diff --git a/Meta/Lagom/CMakeLists.txt b/Meta/Lagom/CMakeLists.txt
index 20a8f85ec5d..e744a685fd6 100644
--- a/Meta/Lagom/CMakeLists.txt
+++ b/Meta/Lagom/CMakeLists.txt
@@ -483,6 +483,7 @@ if (BUILD_TESTING)
         LibCore
         LibDNS
         LibGC
+        LibRegex
         LibTest
         LibTextCodec
         LibThreading
@@ -511,10 +512,6 @@ if (BUILD_TESTING)
     # LibTLS needs a special working directory to find cacert.pem
     lagom_test(../../Tests/LibTLS/TestTLSHandshake.cpp LibTLS LIBS LibTLS LibCrypto)
     lagom_test(../../Tests/LibTLS/TestTLSCertificateParser.cpp LibTLS LIBS LibTLS LibCrypto)
-    
-    # RegexLibC test POSIX <regex.h> and contains many Serenity extensions
-    # It is therefore not reasonable to run it on Lagom, and we only run the Regex test
-    lagom_test(../../Tests/LibRegex/Regex.cpp LIBS LibRegex WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/../../Tests/LibRegex)
 
     # JavaScriptTestRunner + LibTest tests
     # test-js
diff --git a/Tests/LibRegex/CMakeLists.txt b/Tests/LibRegex/CMakeLists.txt
index 5d7d1f1efe5..cfccc90d8ad 100644
--- a/Tests/LibRegex/CMakeLists.txt
+++ b/Tests/LibRegex/CMakeLists.txt
@@ -1,6 +1,5 @@
 set(TEST_SOURCES
-    Regex.cpp
-    RegexLibC.cpp
+    TestRegex.cpp
 )
 
 foreach(source IN LISTS TEST_SOURCES)
diff --git a/Tests/LibRegex/RegexLibC.cpp b/Tests/LibRegex/RegexLibC.cpp
deleted file mode 100644
index ed50912a6d3..00000000000
--- a/Tests/LibRegex/RegexLibC.cpp
+++ /dev/null
@@ -1,1159 +0,0 @@
-/*
- * Copyright (c) 2020, Emanuel Sprung <emanuel.sprung@gmail.com>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
-
-#include <LibTest/TestCase.h>
-
-#include <AK/StringBuilder.h>
-#include <AK/Vector.h>
-#include <regex.h>
-#include <stdio.h>
-
-TEST_CASE(catch_all)
-{
-    ByteString pattern = "^.*$";
-    regex_t regex;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "Hello World", 0, NULL, 0), REG_NOERR);
-
-    regfree(&regex);
-}
-
-TEST_CASE(simple_start)
-{
-    ByteString pattern = "^hello friends";
-    regex_t regex;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "Hello!", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "hello friends", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "Well, hello friends", 0, NULL, 0), REG_NOMATCH);
-
-    regfree(&regex);
-}
-
-TEST_CASE(simple_end)
-{
-    ByteString pattern = ".*hello\\.\\.\\. there$";
-    regex_t regex;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "Hallo", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "I said fyhello... there", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "ahello... therea", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "hello.. there", 0, NULL, 0), REG_NOMATCH);
-
-    regfree(&regex);
-}
-
-TEST_CASE(simple_period)
-{
-    ByteString pattern = "hello.";
-    regex_t regex;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "Hello1", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "hello1", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "hello2", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "hello?", 0, NULL, 0), REG_NOERR);
-
-    regfree(&regex);
-}
-
-TEST_CASE(simple_period_end)
-{
-    ByteString pattern = "hello.$";
-    regex_t regex;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED | REG_NOSUB), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "Hello1", 0, NULL, REG_NOSUB), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "hello1hello1", 0, NULL, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "hello2hell", 0, NULL, REG_GLOBAL), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "hello?", 0, NULL, REG_NOSUB), REG_NOERR);
-
-    regfree(&regex);
-}
-
-TEST_CASE(simple_escaped)
-{
-    ByteString pattern = "hello\\.";
-    regex_t regex;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "hello", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "hello.", 0, NULL, 0), REG_NOERR);
-
-    regfree(&regex);
-}
-
-TEST_CASE(simple_period2_end)
-{
-    ByteString pattern = ".*hi... there$";
-    regex_t regex;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "Hello there", 0, NULL, REG_GLOBAL), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "I said fyhi... there", 0, NULL, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "....hi... ", 0, NULL, REG_GLOBAL), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "I said fyhihii there", 0, NULL, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "I said fyhihi there", 0, NULL, REG_GLOBAL), REG_NOMATCH);
-
-    regfree(&regex);
-}
-
-TEST_CASE(simple_plus)
-{
-    ByteString pattern = "a+";
-    regex_t regex;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED | REG_NOSUB), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "b", 0, NULL, REG_NOSUB), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "a", 0, NULL, REG_NOSUB), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "aaaaaabbbbb", 0, NULL, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "aaaaaaaaaaa", 0, NULL, REG_GLOBAL), REG_NOERR);
-
-    regfree(&regex);
-}
-
-TEST_CASE(simple_questionmark)
-{
-    ByteString pattern = "da?d";
-    regex_t regex;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "a", 0, NULL, REG_GLOBAL), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "daa", 0, NULL, REG_GLOBAL), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "ddddd", 0, NULL, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "dd", 0, NULL, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "dad", 0, NULL, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "dada", 0, NULL, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "adadaa", 0, NULL, REG_GLOBAL), REG_NOERR);
-
-    regfree(&regex);
-}
-
-TEST_CASE(simple_questionmark_matchall)
-{
-    ByteString pattern = "da?d";
-    regex_t regex;
-    static constexpr int num_matches { 5 };
-    regmatch_t matches[num_matches];
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "a", num_matches, matches, REG_GLOBAL), REG_NOMATCH);
-    EXPECT_EQ(matches[0].rm_cnt, 0);
-    EXPECT_EQ(regexec(&regex, "daa", num_matches, matches, REG_GLOBAL), REG_NOMATCH);
-    EXPECT_EQ(matches[0].rm_cnt, 0);
-
-    EXPECT_EQ(regexec(&regex, "ddddd", num_matches, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 2);
-
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 2);
-    EXPECT_EQ(matches[1].rm_so, 2);
-    EXPECT_EQ(matches[1].rm_eo, 4);
-
-    EXPECT_EQ(regexec(&regex, "dd", num_matches, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(regexec(&regex, "dad", num_matches, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(regexec(&regex, "dada", num_matches, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(regexec(&regex, "adadaa", num_matches, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-
-    regfree(&regex);
-}
-
-TEST_CASE(character_class)
-{
-    ByteString pattern = "[[:alpha:]]";
-    regex_t regex;
-    static constexpr int num_matches { 5 };
-    regmatch_t matches[num_matches];
-
-    ByteString haystack = "[Window]\nOpacity=255\nAudibleBeep=0\n";
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, haystack.characters(), num_matches, matches, 0), REG_NOMATCH);
-    EXPECT_EQ(matches[0].rm_cnt, 0);
-    EXPECT_EQ(regexec(&regex, haystack.characters(), num_matches, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 24);
-    EXPECT_EQ(haystack.substring_view(matches[0].rm_so, matches[0].rm_eo - matches[0].rm_so), "W");
-    EXPECT_EQ(haystack.substring_view(matches[1].rm_so, matches[1].rm_eo - matches[1].rm_so), "i");
-
-    regfree(&regex);
-}
-
-TEST_CASE(character_class2)
-{
-    ByteString pattern = "[[:alpha:]]*=([[:digit:]]*)|\\[(.*)\\]";
-    regex_t regex;
-    static constexpr int num_matches { 9 };
-    regmatch_t matches[num_matches];
-
-    ByteString haystack = "[Window]\nOpacity=255\nAudibleBeep=0\n";
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED | REG_NEWLINE), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, haystack.characters(), num_matches, matches, 0), REG_NOERR);
-
-    EXPECT_EQ(matches[0].rm_cnt, 3);
-#if 0
-    for (int i = 0; i < num_matches; ++i) {
-        fprintf(stderr, "Matches[%i].rm_so: %li, .rm_eo: %li .rm_cnt: %li: ", i, matches[i].rm_so, matches[i].rm_eo, matches[i].rm_cnt);
-        fprintf(stderr, "haystack length: %lu\n", haystack.length());
-        if (matches[i].rm_so != -1)
-            fprintf(stderr, "%s\n", haystack.substring_view(matches[i].rm_so, matches[i].rm_eo - matches[i].rm_so).to_byte_string().characters());
-    }
-#endif
-
-    EXPECT_EQ(haystack.substring_view(matches[0].rm_so, matches[0].rm_eo - matches[0].rm_so), "[Window]");
-
-    EXPECT_EQ(matches[1].rm_so, -1);
-    EXPECT_EQ(matches[1].rm_eo, -1);
-    EXPECT_EQ(matches[1].rm_cnt, 0);
-
-    EXPECT_EQ(haystack.substring_view(matches[2].rm_so, matches[2].rm_eo - matches[2].rm_so), "Window");
-    EXPECT_EQ(haystack.substring_view(matches[3].rm_so, matches[3].rm_eo - matches[3].rm_so), "Opacity=255");
-
-    EXPECT_EQ(haystack.substring_view(matches[4].rm_so, matches[4].rm_eo - matches[4].rm_so), "255");
-
-    EXPECT_EQ(matches[5].rm_so, -1);
-    EXPECT_EQ(matches[5].rm_eo, -1);
-    EXPECT_EQ(matches[5].rm_cnt, 0);
-
-    EXPECT_EQ(haystack.substring_view(matches[6].rm_so, matches[6].rm_eo - matches[6].rm_so), "AudibleBeep=0");
-    EXPECT_EQ(haystack.substring_view(matches[7].rm_so, matches[7].rm_eo - matches[7].rm_so), "0");
-
-    EXPECT_EQ(matches[8].rm_so, -1);
-    EXPECT_EQ(matches[8].rm_eo, -1);
-    EXPECT_EQ(matches[8].rm_cnt, 0);
-
-    regfree(&regex);
-}
-
-TEST_CASE(escaped_char_questionmark)
-{
-    ByteString pattern = "This\\.?And\\.?That";
-    regex_t regex;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "ThisAndThat", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "This.And.That", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "This And That", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "This..And..That", 0, NULL, 0), REG_NOMATCH);
-
-    regfree(&regex);
-}
-
-TEST_CASE(char_qualifier_asterisk)
-{
-    ByteString pattern = "regex*";
-    regex_t regex;
-    static constexpr int num_matches { 5 };
-    regmatch_t matches[num_matches];
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "#include <regex.h>", num_matches, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-
-    regfree(&regex);
-}
-
-TEST_CASE(char_utf8)
-{
-    ByteString pattern = "😀";
-    regex_t regex;
-    static constexpr int num_matches { 5 };
-    regmatch_t matches[num_matches];
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "Привет, мир! 😀 γειά σου κόσμος 😀 こんにちは世界", num_matches, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 2);
-
-    regfree(&regex);
-}
-
-TEST_CASE(parens)
-{
-    ByteString pattern = "test(hello)test";
-    regex_t regex;
-    static constexpr int num_matches { 5 };
-    regmatch_t matches[num_matches];
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-
-    EXPECT_EQ(regexec(&regex, "testhellotest", num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 13);
-    EXPECT_EQ(matches[1].rm_so, 4);
-    EXPECT_EQ(matches[1].rm_eo, 9);
-
-    regfree(&regex);
-}
-
-TEST_CASE(parser_error_parens)
-{
-    ByteString pattern = "test()test";
-    regex_t regex;
-    static constexpr int num_matches { 5 };
-    regmatch_t matches[num_matches];
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_EMPTY_EXPR);
-    EXPECT_EQ(regexec(&regex, "testhellotest", num_matches, matches, 0), REG_EMPTY_EXPR);
-
-    regfree(&regex);
-}
-
-TEST_CASE(parser_error_special_characters_used_at_wrong_place)
-{
-    ByteString pattern;
-    regex_t regex;
-    static constexpr int num_matches { 5 };
-    regmatch_t matches[num_matches];
-
-    Vector<char, 4> chars = { '*', '+', '?', '}' };
-    StringBuilder b;
-
-    for (auto& ch : chars) {
-
-        auto error_code_to_check = ch == '}' ? REG_EBRACE : REG_BADRPT;
-
-        // First in ere
-        b.clear();
-        b.append(ch);
-        pattern = b.to_byte_string();
-        EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), error_code_to_check);
-        EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), error_code_to_check);
-        regfree(&regex);
-
-        // After vertical line
-        b.clear();
-        b.append("a|"sv);
-        b.append(ch);
-        pattern = b.to_byte_string();
-        EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), error_code_to_check);
-        EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), error_code_to_check);
-        regfree(&regex);
-
-        // After circumflex
-        b.clear();
-        b.append('^');
-        b.append(ch);
-        pattern = b.to_byte_string();
-        EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), error_code_to_check);
-        EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), error_code_to_check);
-        regfree(&regex);
-
-        // After dollar
-        b.clear();
-        b.append('$');
-        b.append(ch);
-        pattern = b.to_byte_string();
-        EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), error_code_to_check);
-        EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), error_code_to_check);
-        regfree(&regex);
-
-        // After left parens
-        b.clear();
-        b.append('(');
-        b.append(ch);
-        b.append(')');
-        pattern = b.to_byte_string();
-        EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), error_code_to_check);
-        EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), error_code_to_check);
-        regfree(&regex);
-    }
-}
-
-TEST_CASE(parser_error_vertical_line_used_at_wrong_place)
-{
-    ByteString pattern;
-    regex_t regex;
-    static constexpr int num_matches { 5 };
-    regmatch_t matches[num_matches];
-
-    // First in ere
-    pattern = "|asdf";
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_EMPTY_EXPR);
-    EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), REG_EMPTY_EXPR);
-    regfree(&regex);
-
-    // Last in ere
-    pattern = "asdf|";
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_EMPTY_EXPR);
-    EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), REG_EMPTY_EXPR);
-    regfree(&regex);
-
-    // After left parens
-    pattern = "(|asdf)";
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_EMPTY_EXPR);
-    EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), REG_EMPTY_EXPR);
-    regfree(&regex);
-
-    // Proceed right parens
-    pattern = "(asdf)|";
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_EMPTY_EXPR);
-    EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), REG_EMPTY_EXPR);
-    regfree(&regex);
-}
-
-TEST_CASE(parens_qualifier_questionmark)
-{
-    ByteString pattern = "test(hello)?test";
-    regex_t regex;
-    static constexpr int num_matches { 5 };
-    regmatch_t matches[num_matches];
-    char const* match_str;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-
-    match_str = "testtest";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 8);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testtest");
-
-    match_str = "testhellotest";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 13);
-    EXPECT_EQ(matches[1].rm_so, 4);
-    EXPECT_EQ(matches[1].rm_eo, 9);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testhellotest");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
-
-    regfree(&regex);
-}
-
-TEST_CASE(parens_qualifier_asterisk)
-{
-    ByteString pattern = "test(hello)*test";
-    regex_t regex;
-    static constexpr int num_matches { 6 };
-    regmatch_t matches[num_matches];
-    char const* match_str;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-
-    match_str = "testtest";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 8);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testtest");
-
-    match_str = "testhellohellotest";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 18);
-    EXPECT_EQ(matches[1].rm_so, 9);
-    EXPECT_EQ(matches[1].rm_eo, 14);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testhellohellotest");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
-
-    match_str = "testhellohellotest, testhellotest";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 2);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 18);
-    EXPECT_EQ(matches[1].rm_so, 9);
-    EXPECT_EQ(matches[1].rm_eo, 14);
-    EXPECT_EQ(matches[2].rm_so, 20);
-    EXPECT_EQ(matches[2].rm_eo, 33);
-    EXPECT_EQ(matches[3].rm_so, 24);
-    EXPECT_EQ(matches[3].rm_eo, 29);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testhellohellotest");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
-    EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "testhellotest");
-    EXPECT_EQ(StringView(&match_str[matches[3].rm_so], matches[3].rm_eo - matches[3].rm_so), "hello");
-
-    regfree(&regex);
-}
-
-TEST_CASE(parens_qualifier_asterisk_2)
-{
-    ByteString pattern = "test(.*)test";
-    regex_t regex;
-    static constexpr int num_matches { 6 };
-    regmatch_t matches[num_matches];
-    char const* match_str;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-
-    match_str = "testasdftest";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 12);
-    EXPECT_EQ(matches[1].rm_so, 4);
-    EXPECT_EQ(matches[1].rm_eo, 8);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testasdftest");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "asdf");
-
-    match_str = "testasdfasdftest";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 16);
-    EXPECT_EQ(matches[1].rm_so, 4);
-    EXPECT_EQ(matches[1].rm_eo, 12);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testasdfasdftest");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "asdfasdf");
-
-    match_str = "testaaaatest, testbbbtest, testtest";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 35);
-    EXPECT_EQ(matches[1].rm_so, 4);
-    EXPECT_EQ(matches[1].rm_eo, 31);
-
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testaaaatest, testbbbtest, testtest");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "aaaatest, testbbbtest, test");
-
-    regfree(&regex);
-}
-
-TEST_CASE(mulit_parens_qualifier_too_less_result_values)
-{
-    ByteString pattern = "test(a)?(b)?(c)?test";
-    regex_t regex;
-    static constexpr int num_matches { 4 };
-    regmatch_t matches[num_matches];
-    char const* match_str;
-
-    matches[3] = { -2, -2, 100 };
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-
-    match_str = "testabtest";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches - 1, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 10);
-    EXPECT_EQ(matches[1].rm_so, 4);
-    EXPECT_EQ(matches[1].rm_eo, 5);
-    EXPECT_EQ(matches[2].rm_so, 5);
-    EXPECT_EQ(matches[2].rm_eo, 6);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testabtest");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "a");
-    EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "b");
-    EXPECT_EQ(matches[3].rm_so, -2);
-    EXPECT_EQ(matches[3].rm_eo, -2);
-    EXPECT_EQ(matches[3].rm_cnt, 100);
-
-    match_str = "testabctest";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches - 1, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 11);
-    EXPECT_EQ(matches[1].rm_so, 4);
-    EXPECT_EQ(matches[1].rm_eo, 5);
-    EXPECT_EQ(matches[2].rm_so, 5);
-    EXPECT_EQ(matches[2].rm_eo, 6);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testabctest");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "a");
-    EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "b");
-    EXPECT_EQ(matches[3].rm_so, -2);
-    EXPECT_EQ(matches[3].rm_eo, -2);
-    EXPECT_EQ(matches[3].rm_cnt, 100);
-
-    match_str = "testabctest, testabctest";
-
-    EXPECT_EQ(regexec(&regex, match_str, num_matches - 1, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 2);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 11);
-    EXPECT_EQ(matches[1].rm_so, 4);
-    EXPECT_EQ(matches[1].rm_eo, 5);
-    EXPECT_EQ(matches[2].rm_so, 5);
-    EXPECT_EQ(matches[2].rm_eo, 6);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testabctest");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "a");
-    EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "b");
-    EXPECT_EQ(matches[3].rm_so, -2);
-    EXPECT_EQ(matches[3].rm_eo, -2);
-    EXPECT_EQ(matches[3].rm_cnt, 100);
-
-    regfree(&regex);
-}
-
-TEST_CASE(multi_parens_qualifier_questionmark)
-{
-    ByteString pattern = "test(a)?(b)?(c)?test";
-    regex_t regex;
-    static constexpr int num_matches { 8 };
-    regmatch_t matches[num_matches];
-    char const* match_str;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-
-    match_str = "testtest";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 8);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testtest");
-
-    match_str = "testabctest";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 11);
-    EXPECT_EQ(matches[1].rm_so, 4);
-    EXPECT_EQ(matches[1].rm_eo, 5);
-    EXPECT_EQ(matches[2].rm_so, 5);
-    EXPECT_EQ(matches[2].rm_eo, 6);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testabctest");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "a");
-    EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "b");
-
-    match_str = "testabctest, testactest";
-
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 2);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 11);
-    EXPECT_EQ(matches[1].rm_so, 4);
-    EXPECT_EQ(matches[1].rm_eo, 5);
-    EXPECT_EQ(matches[2].rm_so, 5);
-    EXPECT_EQ(matches[2].rm_eo, 6);
-    EXPECT_EQ(matches[3].rm_so, 6);
-    EXPECT_EQ(matches[3].rm_eo, 7);
-
-    EXPECT_EQ(matches[4].rm_so, 13);
-    EXPECT_EQ(matches[4].rm_eo, 23);
-    EXPECT_EQ(matches[5].rm_so, 17);
-    EXPECT_EQ(matches[5].rm_eo, 18);
-    EXPECT_EQ(matches[6].rm_so, -1);
-    EXPECT_EQ(matches[6].rm_eo, -1);
-    EXPECT_EQ(matches[7].rm_so, 18);
-    EXPECT_EQ(matches[7].rm_eo, 19);
-
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testabctest");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "a");
-    EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "b");
-    EXPECT_EQ(StringView(&match_str[matches[3].rm_so], matches[3].rm_eo - matches[3].rm_so), "c");
-    EXPECT_EQ(StringView(&match_str[matches[4].rm_so], matches[4].rm_eo - matches[4].rm_so), "testactest");
-    EXPECT_EQ(StringView(&match_str[matches[5].rm_so], matches[5].rm_eo - matches[5].rm_so), "a");
-    EXPECT_EQ(StringView(&match_str[matches[6].rm_so], matches[6].rm_eo - matches[6].rm_so), "");
-    EXPECT_EQ(StringView(&match_str[matches[7].rm_so], matches[7].rm_eo - matches[7].rm_so), "c");
-
-    regfree(&regex);
-}
-
-TEST_CASE(simple_alternative)
-{
-    ByteString pattern = "test|hello|friends";
-    regex_t regex;
-    static constexpr int num_matches { 1 };
-    regmatch_t matches[num_matches];
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-
-    EXPECT_EQ(regexec(&regex, "test", num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 4);
-
-    EXPECT_EQ(regexec(&regex, "hello", num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 5);
-
-    EXPECT_EQ(regexec(&regex, "friends", num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 7);
-
-    regfree(&regex);
-}
-
-TEST_CASE(alternative_match_groups)
-{
-    ByteString pattern = "test(a)?(b)?|hello ?(dear|my)? friends";
-    regex_t regex;
-    static constexpr int num_matches { 8 };
-    regmatch_t matches[num_matches];
-    char const* match_str;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-
-    match_str = "test";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 4);
-    EXPECT_EQ(matches[1].rm_so, -1);
-    EXPECT_EQ(matches[1].rm_eo, -1);
-    EXPECT_EQ(matches[2].rm_so, -1);
-    EXPECT_EQ(matches[2].rm_eo, -1);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "test");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "");
-    EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "");
-
-    match_str = "testa";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 5);
-    EXPECT_EQ(matches[1].rm_so, 4);
-    EXPECT_EQ(matches[1].rm_eo, 5);
-    EXPECT_EQ(matches[2].rm_so, -1);
-    EXPECT_EQ(matches[2].rm_eo, -1);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testa");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "a");
-    EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "");
-
-    match_str = "testb";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 5);
-    EXPECT_EQ(matches[1].rm_so, -1);
-    EXPECT_EQ(matches[1].rm_eo, -1);
-    EXPECT_EQ(matches[2].rm_so, 4);
-    EXPECT_EQ(matches[2].rm_eo, 5);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "testb");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "");
-    EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "b");
-
-    match_str = "hello friends";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 13);
-    EXPECT_EQ(matches[1].rm_so, -1);
-    EXPECT_EQ(matches[1].rm_eo, -1);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hello friends");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "");
-
-    match_str = "hello dear friends";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 18);
-    EXPECT_EQ(matches[1].rm_so, -1);
-    EXPECT_EQ(matches[1].rm_eo, -1);
-    EXPECT_EQ(matches[2].rm_so, -1);
-    EXPECT_EQ(matches[2].rm_eo, -1);
-    EXPECT_EQ(matches[3].rm_so, 6);
-    EXPECT_EQ(matches[3].rm_eo, 10);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hello dear friends");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "");
-    EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "");
-    EXPECT_EQ(StringView(&match_str[matches[3].rm_so], matches[3].rm_eo - matches[3].rm_so), "dear");
-
-    match_str = "hello my friends";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 16);
-    EXPECT_EQ(matches[1].rm_so, -1);
-    EXPECT_EQ(matches[1].rm_eo, -1);
-    EXPECT_EQ(matches[2].rm_so, -1);
-    EXPECT_EQ(matches[2].rm_eo, -1);
-    EXPECT_EQ(matches[3].rm_so, 6);
-    EXPECT_EQ(matches[3].rm_eo, 8);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hello my friends");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "");
-    EXPECT_EQ(StringView(&match_str[matches[2].rm_so], matches[2].rm_eo - matches[2].rm_so), "");
-    EXPECT_EQ(StringView(&match_str[matches[3].rm_so], matches[3].rm_eo - matches[3].rm_so), "my");
-
-    match_str = "testabc";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOMATCH);
-    EXPECT_EQ(matches[0].rm_cnt, 0);
-    EXPECT_EQ(matches[0].rm_so, -1);
-    EXPECT_EQ(matches[0].rm_eo, -1);
-
-    match_str = "hello test friends";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOMATCH);
-    EXPECT_EQ(matches[0].rm_cnt, 0);
-    EXPECT_EQ(matches[0].rm_so, -1);
-    EXPECT_EQ(matches[0].rm_eo, -1);
-
-    regfree(&regex);
-}
-
-TEST_CASE(parens_qualifier_exact)
-{
-    ByteString pattern = "(hello){3}";
-    regex_t regex;
-    static constexpr int num_matches { 5 };
-    regmatch_t matches[num_matches];
-    char const* match_str;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-
-    match_str = "hello";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOMATCH);
-    EXPECT_EQ(matches[0].rm_cnt, 0);
-
-    match_str = "hellohellohello";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 15);
-    EXPECT_EQ(matches[1].rm_so, 10);
-    EXPECT_EQ(matches[1].rm_eo, 15);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohello");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
-
-    match_str = "hellohellohellohello";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 15);
-    EXPECT_EQ(matches[1].rm_so, 10);
-    EXPECT_EQ(matches[1].rm_eo, 15);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohello");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
-
-    match_str = "test hellohellohello";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 5);
-    EXPECT_EQ(matches[0].rm_eo, 20);
-    EXPECT_EQ(matches[1].rm_so, 15);
-    EXPECT_EQ(matches[1].rm_eo, 20);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohello");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
-
-    regfree(&regex);
-}
-
-TEST_CASE(parens_qualifier_minimum)
-{
-    ByteString pattern = "(hello){3,}";
-    regex_t regex;
-    static constexpr int num_matches { 5 };
-    regmatch_t matches[num_matches];
-    char const* match_str;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-
-    match_str = "hello";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOMATCH);
-    EXPECT_EQ(matches[0].rm_cnt, 0);
-
-    match_str = "hellohellohello";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 15);
-    EXPECT_EQ(matches[1].rm_so, 10);
-    EXPECT_EQ(matches[1].rm_eo, 15);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohello");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
-
-    match_str = "hellohellohellohello";
-
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_SEARCH), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 20);
-    EXPECT_EQ(matches[1].rm_so, 15);
-    EXPECT_EQ(matches[1].rm_eo, 20);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohellohello");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
-
-    match_str = "test hellohellohello";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 5);
-    EXPECT_EQ(matches[0].rm_eo, 20);
-    EXPECT_EQ(matches[1].rm_so, 15);
-    EXPECT_EQ(matches[1].rm_eo, 20);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohello");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
-
-    match_str = "test hellohellohellohello";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 5);
-    EXPECT_EQ(matches[0].rm_eo, 25);
-    EXPECT_EQ(matches[1].rm_so, 20);
-    EXPECT_EQ(matches[1].rm_eo, 25);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohellohello");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
-
-    regfree(&regex);
-}
-
-TEST_CASE(parens_qualifier_maximum)
-{
-    ByteString pattern = "(hello){2,3}";
-    regex_t regex;
-    static constexpr int num_matches { 5 };
-    regmatch_t matches[num_matches];
-    char const* match_str;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-
-    match_str = "hello";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOMATCH);
-    EXPECT_EQ(matches[0].rm_cnt, 0);
-
-    match_str = "hellohellohello";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 15);
-    EXPECT_EQ(matches[1].rm_so, 10);
-    EXPECT_EQ(matches[1].rm_eo, 15);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohello");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
-
-    match_str = "hellohellohellohello";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 0);
-    EXPECT_EQ(matches[0].rm_eo, 15);
-    EXPECT_EQ(matches[1].rm_so, 10);
-    EXPECT_EQ(matches[1].rm_eo, 15);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohello");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
-
-    match_str = "test hellohellohello";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 5);
-    EXPECT_EQ(matches[0].rm_eo, 20);
-    EXPECT_EQ(matches[1].rm_so, 15);
-    EXPECT_EQ(matches[1].rm_eo, 20);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohello");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
-
-    match_str = "test hellohellohellohello";
-    EXPECT_EQ(regexec(&regex, match_str, num_matches, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(matches[0].rm_so, 5);
-    EXPECT_EQ(matches[0].rm_eo, 20);
-    EXPECT_EQ(matches[1].rm_so, 15);
-    EXPECT_EQ(matches[1].rm_eo, 20);
-    EXPECT_EQ(StringView(&match_str[matches[0].rm_so], matches[0].rm_eo - matches[0].rm_so), "hellohellohello");
-    EXPECT_EQ(StringView(&match_str[matches[1].rm_so], matches[1].rm_eo - matches[1].rm_so), "hello");
-
-    regfree(&regex);
-}
-
-TEST_CASE(char_qualifier_min_max)
-{
-    ByteString pattern = "c{3,30}";
-    regex_t regex;
-    static constexpr int num_matches { 5 };
-    regmatch_t matches[num_matches];
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-
-    EXPECT_EQ(regexec(&regex, "cc", num_matches, matches, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "ccc", num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "cccccccccccccccccccccccccccccc", num_matches, matches, 0), REG_NOERR);
-    EXPECT_EQ(matches[0].rm_cnt, 1);
-    EXPECT_EQ(regexec(&regex, "ccccccccccccccccccccccccccccccc", num_matches, matches, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "ccccccccccccccccccccccccccccccc", num_matches, matches, REG_GLOBAL), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "cccccccccccccccccccccccccccccccc", num_matches, matches, 0), REG_NOMATCH);
-
-    regfree(&regex);
-}
-
-TEST_CASE(simple_bracket_chars)
-{
-    ByteString pattern = "[abc]";
-    regex_t regex;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "a", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "b", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "c", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "d", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "e", 0, NULL, 0), REG_NOMATCH);
-    regfree(&regex);
-}
-
-TEST_CASE(simple_bracket_chars_inverse)
-{
-    ByteString pattern = "[^abc]";
-    regex_t regex;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "a", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "b", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "c", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "d", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "e", 0, NULL, 0), REG_NOERR);
-    regfree(&regex);
-}
-
-TEST_CASE(simple_bracket_chars_range)
-{
-    ByteString pattern = "[a-d]";
-    regex_t regex;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "a", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "b", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "c", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "d", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "e", 0, NULL, 0), REG_NOMATCH);
-    regfree(&regex);
-}
-
-TEST_CASE(simple_bracket_chars_range_inverse)
-{
-    ByteString pattern = "[^a-df-z]";
-    regex_t regex;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "a", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "b", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "c", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "d", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "e", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "k", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "z", 0, NULL, 0), REG_NOMATCH);
-    regfree(&regex);
-}
-
-TEST_CASE(bracket_character_class_uuid)
-{
-    ByteString pattern = "^([[:xdigit:]]{8})-([[:xdigit:]]{4})-([[:xdigit:]]{4})-([[:xdigit:]]{4})-([[:xdigit:]]{12})$";
-    regex_t regex;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "fb9b62a2-1579-4e3a-afba-76239ccb6583", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "fb9b62a2", 0, NULL, 0), REG_NOMATCH);
-
-    regfree(&regex);
-}
-
-TEST_CASE(simple_bracket_character_class_inverse)
-{
-    ByteString pattern = "[^[:digit:]]";
-    regex_t regex;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "1", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "2", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "3", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "d", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "e", 0, NULL, 0), REG_NOERR);
-    regfree(&regex);
-}
-
-TEST_CASE(email_address)
-{
-    ByteString pattern = "^[A-Z0-9a-z._%+-]{1,64}@(?:[A-Za-z0-9-]{1,63}\\.){1,125}[A-Za-z]{2,63}$";
-    regex_t regex;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "emanuel.sprung@gmail.com", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "andreas@ladybird.org", 0, NULL, 0), REG_NOERR);
-
-    regfree(&regex);
-}
-
-TEST_CASE(error_message)
-{
-    ByteString pattern = "^[A-Z0-9[a-z._%+-]{1,64}@[A-Za-z0-9-]{1,63}\\.{1,125}[A-Za-z]{2,63}$";
-    regex_t regex;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED), REG_EBRACK);
-    EXPECT_EQ(regexec(&regex, "asdf@asdf.com", 0, NULL, 0), REG_EBRACK);
-    char buf[1024];
-    size_t buflen = 1024;
-    auto len = regerror(0, &regex, buf, buflen);
-    ByteString expected = "Error during parsing of regular expression:\n    ^[A-Z0-9[a-z._%+-]{1,64}@[A-Za-z0-9-]{1,63}\\.{1,125}[A-Za-z]{2,63}$\n             ^---- [ ] imbalance.";
-    for (size_t i = 0; i < len; ++i) {
-        EXPECT_EQ(buf[i], expected[i]);
-    }
-
-    regfree(&regex);
-}
-
-TEST_CASE(simple_ignorecase)
-{
-    ByteString pattern = "^hello friends";
-    regex_t regex;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED | REG_NOSUB | REG_ICASE), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "Hello Friends", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "hello Friends", 0, NULL, 0), REG_NOERR);
-
-    EXPECT_EQ(regexec(&regex, "hello Friends!", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "hello Friends!", 0, NULL, REG_GLOBAL), REG_NOERR);
-
-    EXPECT_EQ(regexec(&regex, "hell Friends", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "hell Friends", 0, NULL, REG_GLOBAL), REG_NOMATCH);
-
-    regfree(&regex);
-}
-
-TEST_CASE(simple_notbol_noteol)
-{
-    ByteString pattern = "^hello friends$";
-    ByteString pattern2 = "hello friends";
-    regex_t regex, regex2;
-
-    EXPECT_EQ(regcomp(&regex, pattern.characters(), REG_EXTENDED | REG_NOSUB | REG_ICASE), REG_NOERR);
-    EXPECT_EQ(regcomp(&regex2, pattern2.characters(), REG_EXTENDED | REG_NOSUB | REG_ICASE), REG_NOERR);
-
-    EXPECT_EQ(regexec(&regex, "hello friends", 0, NULL, REG_NOTBOL), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "hello friends", 0, NULL, REG_NOTEOL), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "hello friends", 0, NULL, REG_NOTBOL | REG_NOTEOL), REG_NOMATCH);
-
-    EXPECT_EQ(regexec(&regex, "a hello friends b", 0, NULL, REG_NOTBOL), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "a hello friends", 0, NULL, REG_NOTBOL), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "a hello friends", 0, NULL, REG_NOTBOL | REG_SEARCH), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "a hello friends b", 0, NULL, REG_NOTBOL | REG_SEARCH), REG_NOERR);
-
-    EXPECT_EQ(regexec(&regex, "a hello friends b", 0, NULL, REG_NOTEOL), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "hello friends b", 0, NULL, REG_NOTEOL), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "hello friends b", 0, NULL, REG_NOTEOL | REG_SEARCH), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "a hello friends b", 0, NULL, REG_NOTEOL | REG_SEARCH), REG_NOMATCH);
-
-    EXPECT_EQ(regexec(&regex, "a hello friends b", 0, NULL, REG_NOTBOL | REG_NOTEOL), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "a hello friends b", 0, NULL, REG_NOTBOL | REG_NOTEOL | REG_SEARCH), REG_NOMATCH);
-
-    EXPECT_EQ(regexec(&regex2, "hello friends", 0, NULL, REG_NOTBOL), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex2, "hello friends", 0, NULL, REG_NOTEOL), REG_NOMATCH);
-
-    regfree(&regex);
-    regfree(&regex2);
-}
-
-TEST_CASE(bre_basic)
-{
-    regex_t regex;
-    EXPECT_EQ(regcomp(&regex, "hello friends", REG_NOSUB | REG_ICASE), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "hello friends", 0, NULL, 0), REG_NOERR);
-    regfree(&regex);
-
-    EXPECT_EQ(regcomp(&regex, "\\(15\\)\\1", REG_NOSUB | REG_ICASE), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "1515", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "55", 0, NULL, 0), REG_NOMATCH);
-    regfree(&regex);
-
-    EXPECT_EQ(regcomp(&regex, "15\\{1,2\\}", REG_NOSUB | REG_ICASE), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "15", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "1515", 0, NULL, 0), REG_NOMATCH);
-    EXPECT_EQ(regexec(&regex, "55", 0, NULL, 0), REG_NOMATCH);
-    regfree(&regex);
-
-    EXPECT_EQ(regcomp(&regex, "15{1,2}", REG_NOSUB | REG_ICASE), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "15{1,2}", 0, NULL, 0), REG_NOERR);
-    regfree(&regex);
-
-    EXPECT_EQ(regcomp(&regex, "1[56]", REG_NOSUB | REG_ICASE), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "15", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "16", 0, NULL, 0), REG_NOERR);
-    EXPECT_EQ(regexec(&regex, "17", 0, NULL, 0), REG_NOMATCH);
-    regfree(&regex);
-}
diff --git a/Tests/LibRegex/Regex.cpp b/Tests/LibRegex/TestRegex.cpp
similarity index 100%
rename from Tests/LibRegex/Regex.cpp
rename to Tests/LibRegex/TestRegex.cpp