diff --git a/CHANGELOG.md b/CHANGELOG.md
index c8972013..811f5e15 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,14 @@
 
 ## Unreleased
 
+## [v2.1.0 (2023-03-21)](https://github.com/pestphp/pest/compare/v2.0.2...v2.1.0)
+
+### Added
+- `only` test case method ([bcd1503](https://github.com/pestphp/pest/commit/bcd1503cade938853a55c1283b02b6b820ea0b69))
+
+### Fixed
+- Issues with different characters on test names ([715](https://github.com/pestphp/pest/pull/715))
+
 ## [v2.0.2 (2023-03-20)](https://github.com/pestphp/pest/compare/v2.0.1...v2.0.2)
 
 ### Fixed
diff --git a/composer.json b/composer.json
index bbc508f0..3685d4df 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
     "require": {
         "php": "^8.1.0",
         "brianium/paratest": "^7.1.2",
-        "nunomaduro/collision": "^7.2.0",
+        "nunomaduro/collision": "^7.3.1",
         "nunomaduro/termwind": "^1.15.1",
         "pestphp/pest-plugin": "^2.0.0",
         "pestphp/pest-plugin-arch": "^2.0.1",
@@ -92,6 +92,7 @@
                 "Pest\\Plugins\\Environment",
                 "Pest\\Plugins\\Help",
                 "Pest\\Plugins\\Memory",
+                "Pest\\Plugins\\Only",
                 "Pest\\Plugins\\Printer",
                 "Pest\\Plugins\\ProcessIsolation",
                 "Pest\\Plugins\\Profile",
diff --git a/overrides/TextUI/TestSuiteFilterProcessor.php b/overrides/TextUI/TestSuiteFilterProcessor.php
new file mode 100644
index 00000000..31ce5fe6
--- /dev/null
+++ b/overrides/TextUI/TestSuiteFilterProcessor.php
@@ -0,0 +1,128 @@
+<?php
+
+/*
+ * BSD 3-Clause License
+ *
+ * Copyright (c) 2001-2023, Sebastian Bergmann
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+declare(strict_types=1);
+
+/*
+ * This file is part of PHPUnit.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace PHPUnit\TextUI;
+
+use function array_map;
+use Pest\Plugins\Only;
+use PHPUnit\Event;
+use PHPUnit\Framework\TestSuite;
+use PHPUnit\Runner\Filter\Factory;
+use PHPUnit\TextUI\Configuration\Configuration;
+use PHPUnit\TextUI\Configuration\FilterNotConfiguredException;
+
+/**
+ * @internal This class is not covered by the backward compatibility promise for PHPUnit
+ */
+final class TestSuiteFilterProcessor
+{
+    private Factory $filterFactory;
+
+    public function __construct(Factory $factory = new Factory)
+    {
+        $this->filterFactory = $factory;
+    }
+
+    /**
+     * @throws Event\RuntimeException
+     * @throws FilterNotConfiguredException
+     */
+    public function process(Configuration $configuration, TestSuite $suite): void
+    {
+        if (! $configuration->hasFilter() &&
+            ! $configuration->hasGroups() &&
+            ! $configuration->hasExcludeGroups() &&
+            ! $configuration->hasTestsCovering() &&
+            ! $configuration->hasTestsUsing() &&
+            ! Only::isEnabled()
+        ) {
+            return;
+        }
+
+        if ($configuration->hasExcludeGroups()) {
+            $this->filterFactory->addExcludeGroupFilter(
+                $configuration->excludeGroups()
+            );
+        }
+
+        if (Only::isEnabled()) {
+            $this->filterFactory->addIncludeGroupFilter(['__pest_only']);
+        } elseif ($configuration->hasGroups()) {
+            $this->filterFactory->addIncludeGroupFilter(
+                $configuration->groups()
+            );
+        }
+
+        if ($configuration->hasTestsCovering()) {
+            $this->filterFactory->addIncludeGroupFilter(
+                array_map(
+                    static fn (string $name): string => '__phpunit_covers_'.$name,
+                    $configuration->testsCovering()
+                )
+            );
+        }
+
+        if ($configuration->hasTestsUsing()) {
+            $this->filterFactory->addIncludeGroupFilter(
+                array_map(
+                    static fn (string $name): string => '__phpunit_uses_'.$name,
+                    $configuration->testsUsing()
+                )
+            );
+        }
+
+        if ($configuration->hasFilter()) {
+            $this->filterFactory->addNameFilter(
+                $configuration->filter()
+            );
+        }
+
+        $suite->injectFilter($this->filterFactory);
+
+        Event\Facade::emitter()->testSuiteFiltered(
+            Event\TestSuite\TestSuiteBuilder::from($suite)
+        );
+    }
+}
diff --git a/src/Bootstrappers/BootOverrides.php b/src/Bootstrappers/BootOverrides.php
index d25f935d..e1489d7c 100644
--- a/src/Bootstrappers/BootOverrides.php
+++ b/src/Bootstrappers/BootOverrides.php
@@ -23,6 +23,7 @@ final class BootOverrides implements Bootstrapper
         'Runner/TestSuiteLoader.php',
         'TextUI/Command/WarmCodeCoverageCacheCommand.php',
         'TextUI/Output/Default/ProgressPrinter/TestSkippedSubscriber.php',
+        'TextUI/TestSuiteFilterProcessor.php',
     ];
 
     /**
diff --git a/src/Expectation.php b/src/Expectation.php
index 07b0d5d5..537883bb 100644
--- a/src/Expectation.php
+++ b/src/Expectation.php
@@ -64,7 +64,7 @@ final class Expectation
      */
     public function and(mixed $value): Expectation
     {
-        return $value instanceof static ? $value : new self($value);
+        return $value instanceof self ? $value : new self($value);
     }
 
     /**
diff --git a/src/PendingCalls/TestCall.php b/src/PendingCalls/TestCall.php
index c793ef17..8b237ec7 100644
--- a/src/PendingCalls/TestCall.php
+++ b/src/PendingCalls/TestCall.php
@@ -10,6 +10,7 @@ use Pest\Factories\Covers\CoversClass;
 use Pest\Factories\Covers\CoversFunction;
 use Pest\Factories\Covers\CoversNothing;
 use Pest\Factories\TestCaseMethodFactory;
+use Pest\Plugins\Only;
 use Pest\Support\Backtrace;
 use Pest\Support\Exporter;
 use Pest\Support\HigherOrderCallables;
@@ -134,6 +135,16 @@ final class TestCall
         return $this;
     }
 
+    /**
+     * Filters the test suite by "only" tests.
+     */
+    public function only(): self
+    {
+        Only::enable($this);
+
+        return $this;
+    }
+
     /**
      * Skips the current test.
      */
diff --git a/src/Pest.php b/src/Pest.php
index d0fa2ff3..32978f6e 100644
--- a/src/Pest.php
+++ b/src/Pest.php
@@ -6,7 +6,7 @@ namespace Pest;
 
 function version(): string
 {
-    return '2.0.2';
+    return '2.1.0';
 }
 
 function testDirectory(string $file = ''): string
diff --git a/src/Plugins/Only.php b/src/Plugins/Only.php
new file mode 100644
index 00000000..aa4556b8
--- /dev/null
+++ b/src/Plugins/Only.php
@@ -0,0 +1,61 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pest\Plugins;
+
+use Pest\Contracts\Plugins\Shutdownable;
+use Pest\PendingCalls\TestCall;
+
+/**
+ * @internal
+ */
+final class Only implements Shutdownable
+{
+    /**
+     * The temporary folder.
+     */
+    private const TEMPORARY_FOLDER = __DIR__
+        .DIRECTORY_SEPARATOR
+        .'..'
+        .DIRECTORY_SEPARATOR
+        .'..'
+        .DIRECTORY_SEPARATOR
+        .'.temp';
+
+    /**
+     * {@inheritDoc}
+     */
+    public function shutdown(): void
+    {
+        $lockFile = self::TEMPORARY_FOLDER.DIRECTORY_SEPARATOR.'only.lock';
+
+        if (file_exists($lockFile)) {
+            unlink($lockFile);
+        }
+    }
+
+    /**
+     * Creates the lock file.
+     */
+    public static function enable(TestCall $testCall): void
+    {
+        $testCall->group('__pest_only');
+
+        $lockFile = self::TEMPORARY_FOLDER.DIRECTORY_SEPARATOR.'only.lock';
+
+        if (! file_exists($lockFile)) {
+            touch($lockFile);
+        }
+    }
+
+    /**
+     * Checks if "only" mode is enabled.
+     */
+    public static function isEnabled(): bool
+    {
+        $lockFile = self::TEMPORARY_FOLDER.DIRECTORY_SEPARATOR.'only.lock';
+
+        return file_exists($lockFile);
+    }
+}
diff --git a/src/Support/Arr.php b/src/Support/Arr.php
index bd80ae56..aed6c5a7 100644
--- a/src/Support/Arr.php
+++ b/src/Support/Arr.php
@@ -73,7 +73,7 @@ final class Arr
 
         foreach ($array as $key => $value) {
             if (is_array($value) && $value !== []) {
-                $results = array_merge($results, static::dot($value, $prepend.$key.'.'));
+                $results = array_merge($results, self::dot($value, $prepend.$key.'.'));
             } else {
                 $results[$prepend.$value] = $value;
             }
diff --git a/src/Support/Reflection.php b/src/Support/Reflection.php
index 14edd7ad..18a71aa6 100644
--- a/src/Support/Reflection.php
+++ b/src/Support/Reflection.php
@@ -42,7 +42,7 @@ final class Reflection
             }
 
             if (is_callable($method)) {
-                return static::bindCallable($method, $args);
+                return self::bindCallable($method, $args);
             }
 
             throw $exception;
@@ -72,7 +72,7 @@ final class Reflection
 
         return $test instanceof \PHPUnit\Framework\TestCase
             ? Closure::fromCallable($callable)->bindTo($test)(...$test->providedData())
-            : static::bindCallable($callable);
+            : self::bindCallable($callable);
     }
 
     /**
diff --git a/src/Support/Str.php b/src/Support/Str.php
index 9ed75c1f..21ee5c5b 100644
--- a/src/Support/Str.php
+++ b/src/Support/Str.php
@@ -61,7 +61,8 @@ final class Str
     {
         $code = self::PREFIX.str_replace(' ', '_', $code);
 
-        return (string) preg_replace('/[^A-Z_a-z0-9]/', '_', $code);
+        // sticks to PHP8.2 function naming rules https://www.php.net/manual/en/functions.user-defined.php
+        return (string) preg_replace('/[^a-zA-Z0-9_\x80-\xff]/', '_', $code);
     }
 
     /**
diff --git a/tests/.snapshots/help-command.txt b/tests/.snapshots/help-command.txt
index aa7cf29f..2ebc633d 100644
--- a/tests/.snapshots/help-command.txt
+++ b/tests/.snapshots/help-command.txt
@@ -1,5 +1,5 @@
 
-  Pest Testing Framework 2.0.2.  
+  Pest Testing Framework 2.1.0.  
 
   USAGE: pest <file> [options]  
 
diff --git a/tests/.snapshots/success.txt b/tests/.snapshots/success.txt
index ad025028..2db57d3f 100644
--- a/tests/.snapshots/success.txt
+++ b/tests/.snapshots/success.txt
@@ -914,6 +914,52 @@
   ✓ it may start with P with ('P\PPPackages\Foo', 'PPPackages\Foo')
   ✓ it may start with P with ('PPPackages\Foo', 'PPPackages\Foo') #1
   ✓ it may start with P with ('PPPackages\Foo', 'PPPackages\Foo') #2
+  ✓ ふ+が+
+  ✓ ほげ
+  ✓ 卜竹弓一十山
+  ✓ アゴデヸ
+  ✓ !p8VrB
+  ✓ &xe6VeKWF#n4
+  ✓ %%HurHUnw7zM!
+  ✓ rundeliekend
+  ✓ g%%c!Jt9$fy#Kf
+  ✓ NRs*Gz2@hmB$W$BPD%%b2U%3P%z%apnwSX
+  ✓ ÀĤ{¼÷
+  ✓ ìèéàòç
+  ✓ زهراء المعادي
+  ✓ الجبيهه
+  ✓ الظهران
+  ✓ Каролин
+  ✓ অ্যান্টার্কটিকা
+  ✓ Frýdek-Místek"
+  ✓ Allingåbro&
+  ✓ Κεντροαφρικανική Δημοκρατία
+  ✓ آذربایجان غربی
+  ✓ זימבבואה
+  ✓ Belišće
+  ✓ Գվատեմալա
+  ✓ パプアニューギニア
+  ✓ 富山県
+  ✓ Қарағанды
+  ✓ Қостанай
+  ✓ 안양시 동안구
+  ✓ Itālija
+  ✓ Honningsvåg
+  ✓ Águeda
+  ✓ Râșcani
+  ✓ Năsăud
+  ✓ Орехово-Зуево
+  ✓ Čereňany
+  ✓ Moravče
+  ✓ Šentjernej
+  ✓ Врање
+  ✓ Крушевац
+  ✓ Åkersberga
+  ✓ บอสเนียและเฮอร์เซโกวีนา
+  ✓ Birleşik Arap Emirlikleri
+  ✓ Німеччина
+  ✓ Nam Định
+  ✓ 呼和浩特
 
    PASS  Tests\Unit\TestSuite
   ✓ it does not allow to add the same test description twice
@@ -948,4 +994,4 @@
    PASS  Tests\Visual\Version
   ✓ visual snapshot of help command output
 
-  Tests:    2 deprecated, 3 warnings, 4 incomplete, 1 notice, 4 todos, 12 skipped, 653 passed (1604 assertions)
\ No newline at end of file
+  Tests:    2 deprecated, 3 warnings, 4 incomplete, 1 notice, 4 todos, 12 skipped, 695 passed (1680 assertions)
diff --git a/tests/.snapshots/version-command.txt b/tests/.snapshots/version-command.txt
index 0ad97038..a50a10ae 100644
--- a/tests/.snapshots/version-command.txt
+++ b/tests/.snapshots/version-command.txt
@@ -1,3 +1,3 @@
 
-  Pest Testing Framework 2.0.2.  
+  Pest Testing Framework 2.1.0.  
 
diff --git a/tests/Unit/TestName.php b/tests/Unit/TestName.php
index 3f52e700..b7f91d54 100644
--- a/tests/Unit/TestName.php
+++ b/tests/Unit/TestName.php
@@ -11,3 +11,60 @@ it('may start with P', function (string $real, string $toBePrinted) {
     ['PPPackages\Foo', 'PPPackages\Foo'],
     ['PPPackages\Foo', 'PPPackages\Foo'],
 ]);
+
+$names = [
+    'ふ+が+' => '__pest_evaluable_ふ_が_',
+    'ほげ' => '__pest_evaluable_ほげ',
+    '卜竹弓一十山' => '__pest_evaluable_卜竹弓一十山',
+    'アゴデヸ' => '__pest_evaluable_アゴデヸ',
+    '!p8VrB' => '__pest_evaluable__p8VrB',
+    '&xe6VeKWF#n4' => '__pest_evaluable__xe6VeKWF_n4',
+    '%%HurHUnw7zM!' => '__pest_evaluable___HurHUnw7zM_',
+    'rundeliekend' => '__pest_evaluable_rundeliekend',
+    'g%%c!Jt9$fy#Kf' => '__pest_evaluable_g__c_Jt9_fy_Kf',
+    'NRs*Gz2@hmB$W$BPD%%b2U%3P%z%apnwSX' => '__pest_evaluable_NRs_Gz2_hmB_W_BPD__b2U_3P_z_apnwSX',
+    'ÀĤ{¼÷' => '__pest_evaluable_ÀĤ_¼÷',
+    'ìèéàòç' => '__pest_evaluable_ìèéàòç',
+    'زهراء المعادي' => '__pest_evaluable_زهراء_المعادي',
+    'الجبيهه' => '__pest_evaluable_الجبيهه',
+    'الظهران' => '__pest_evaluable_الظهران',
+    'Каролин' => '__pest_evaluable_Каролин',
+    'অ্যান্টার্কটিকা' => '__pest_evaluable_অ্যান্টার্কটিকা',
+    'Frýdek-Místek"' => '__pest_evaluable_Frýdek_Místek_',
+    'Allingåbro&' => '__pest_evaluable_Allingåbro_',
+    'Κεντροαφρικανική Δημοκρατία' => '__pest_evaluable_Κεντροαφρικανική_Δημοκρατία',
+    'آذربایجان غربی' => '__pest_evaluable_آذربایجان_غربی',
+    'זימבבואה' => '__pest_evaluable_זימבבואה',
+    'Belišće' => '__pest_evaluable_Belišće',
+    'Գվատեմալա' => '__pest_evaluable_Գվատեմալա',
+    'パプアニューギニア' => '__pest_evaluable_パプアニューギニア',
+    '富山県' => '__pest_evaluable_富山県',
+    'Қарағанды' => '__pest_evaluable_Қарағанды',
+    'Қостанай' => '__pest_evaluable_Қостанай',
+    '안양시 동안구' => '__pest_evaluable_안양시_동안구',
+    'Itālija' => '__pest_evaluable_Itālija',
+    'Honningsvåg' => '__pest_evaluable_Honningsvåg',
+    'Águeda' => '__pest_evaluable_Águeda',
+    'Râșcani' => '__pest_evaluable_Râșcani',
+    'Năsăud' => '__pest_evaluable_Năsăud',
+    'Орехово-Зуево' => '__pest_evaluable_Орехово_Зуево',
+    'Čereňany' => '__pest_evaluable_Čereňany',
+    'Moravče' => '__pest_evaluable_Moravče',
+    'Šentjernej' => '__pest_evaluable_Šentjernej',
+    'Врање' => '__pest_evaluable_Врање',
+    'Крушевац' => '__pest_evaluable_Крушевац',
+    'Åkersberga' => '__pest_evaluable_Åkersberga',
+    'บอสเนียและเฮอร์เซโกวีนา' => '__pest_evaluable_บอสเนียและเฮอร์เซโกวีนา',
+    'Birleşik Arap Emirlikleri' => '__pest_evaluable_Birleşik_Arap_Emirlikleri',
+    'Німеччина' => '__pest_evaluable_Німеччина',
+    'Nam Định' => '__pest_evaluable_Nam_Định',
+    '呼和浩特' => '__pest_evaluable_呼和浩特',
+];
+
+foreach ($names as $name => $methodName) {
+    test($name)
+        ->expect(fn () => static::getLatestPrintableTestCaseMethodName())
+        ->toBe($name)
+        ->and(fn () => $this->name())
+        ->toBe($methodName);
+}
diff --git a/tests/Visual/Parallel.php b/tests/Visual/Parallel.php
index b3817ef7..5c770e05 100644
--- a/tests/Visual/Parallel.php
+++ b/tests/Visual/Parallel.php
@@ -15,6 +15,6 @@ $run = function () {
 };
 
 test('parallel', function () use ($run) {
-    expect($run())->toContain('Tests:    2 deprecated, 3 warnings, 4 incomplete, 1 notice, 4 todos, 9 skipped, 644 passed (1592 assertions)')
+    expect($run())->toContain('Tests:    2 deprecated, 3 warnings, 4 incomplete, 1 notice, 4 todos, 9 skipped, 686 passed (1668 assertions)')
         ->toContain('Parallel: 3 processes');
 })->skip(PHP_OS_FAMILY === 'Windows');