diff --git a/CHANGELOG.md b/CHANGELOG.md
index 92a9d77a..3ff55eb1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 For a full diff see [`2.19.1...main`][2.19.1...main].
 
+### Fixed
+
+- Fixed discovery of `@maximumDuration` annotation when a test case does not have any test methods ([#687]), by [@courtney-miles]
+
 ## [`2.19.1`][2.19.1]
 
 For a full diff see [`2.19.0...2.19.1`][2.19.0...2.19.1].
@@ -413,6 +417,7 @@ For a full diff see [`7afa59c...1.0.0`][7afa59c...1.0.0].
 [#664]: https://github.com/ergebnis/phpunit-slow-test-detector/pull/664
 
 [@dantleech]: https://github.com/dantleech
+[@courtney-miles]: https://github.com/courtney-miles
 [@HypeMC]: https://github.com/HypeMC
 [@localheinz]: https://github.com/localheinz
 [@morgan-atproperties]: https://github.com/morgan-atproperties
diff --git a/src/Extension.php b/src/Extension.php
index d753042e..03782540 100644
--- a/src/Extension.php
+++ b/src/Extension.php
@@ -371,6 +371,10 @@ private function resolveMaximumDuration(string $test): MaximumDuration
                 );
             }
 
+            if (\strpos($test, '::') === false) {
+                return $this->maximumDuration;
+            }
+
             list($testClassName, $testMethodName) = \explode(
                 '::',
                 $test
diff --git a/test/EndToEnd/Version06/TestCase/WithoutTestMethods/SleeperTest.php b/test/EndToEnd/Version06/TestCase/WithoutTestMethods/SleeperTest.php
new file mode 100644
index 00000000..52eff51e
--- /dev/null
+++ b/test/EndToEnd/Version06/TestCase/WithoutTestMethods/SleeperTest.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Copyright (c) 2021-2025 Andreas Möller
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE.md file that was distributed with this source code.
+ *
+ * @see https://github.com/ergebnis/phpunit-slow-test-detector
+ */
+
+namespace Ergebnis\PHPUnit\SlowTestDetector\Test\EndToEnd\Version06\TestCase\WithoutTestMethods;
+
+use PHPUnit\Framework;
+
+/**
+ * @covers \Ergebnis\PHPUnit\SlowTestDetector\Test\Fixture\Sleeper
+ */
+final class SleeperTest extends Framework\TestCase
+{
+}
diff --git a/test/EndToEnd/Version06/TestCase/WithoutTestMethods/phpunit.xml b/test/EndToEnd/Version06/TestCase/WithoutTestMethods/phpunit.xml
new file mode 100644
index 00000000..5c65fc97
--- /dev/null
+++ b/test/EndToEnd/Version06/TestCase/WithoutTestMethods/phpunit.xml
@@ -0,0 +1,34 @@
+<phpunit
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/6.5/phpunit.xsd"
+    beStrictAboutChangesToGlobalState="true"
+    beStrictAboutOutputDuringTests="true"
+    beStrictAboutTestsThatDoNotTestAnything="true"
+    beStrictAboutTodoAnnotatedTests="true"
+    bootstrap="../../../../../vendor/autoload.php"
+    colors="true"
+    columns="max"
+    forceCoversAnnotation="true"
+    stopOnError="false"
+    stopOnFailure="false"
+    stopOnIncomplete="false"
+    stopOnSkipped="false"
+    verbose="true"
+>
+    <listeners>
+        <listener class="Ergebnis\PHPUnit\SlowTestDetector\Extension">
+            <arguments>
+                <array>
+                    <element key="maximum-duration">
+                        <integer>100</integer>
+                    </element>
+                </array>
+            </arguments>
+        </listener>
+    </listeners>
+    <testsuites>
+        <testsuite name="Unit Tests">
+            <directory>.</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>
diff --git a/test/EndToEnd/Version06/TestCase/WithoutTestMethods/test.phpt b/test/EndToEnd/Version06/TestCase/WithoutTestMethods/test.phpt
new file mode 100644
index 00000000..267931ce
--- /dev/null
+++ b/test/EndToEnd/Version06/TestCase/WithoutTestMethods/test.phpt
@@ -0,0 +1,20 @@
+--TEST--
+With a test case that has no test methods
+--FILE--
+<?php
+
+declare(strict_types=1);
+
+use PHPUnit\TextUI;
+
+$_SERVER['argv'][] = '--configuration=test/EndToEnd/Version06/TestCase/WithoutTestMethods/phpunit.xml';
+
+require_once __DIR__ . '/../../../../../vendor/autoload.php';
+
+PHPUnit\TextUI\Command::main();
+--EXPECTF--
+%a
+
+W                                                                   1 / 1 (100%)
+
+%a
diff --git a/test/EndToEnd/Version07/TestCase/WithoutTestMethods/SleeperTest.php b/test/EndToEnd/Version07/TestCase/WithoutTestMethods/SleeperTest.php
new file mode 100644
index 00000000..a709139f
--- /dev/null
+++ b/test/EndToEnd/Version07/TestCase/WithoutTestMethods/SleeperTest.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Copyright (c) 2021-2025 Andreas Möller
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE.md file that was distributed with this source code.
+ *
+ * @see https://github.com/ergebnis/phpunit-slow-test-detector
+ */
+
+namespace Ergebnis\PHPUnit\SlowTestDetector\Test\EndToEnd\Version07\TestCase\WithoutTestMethods;
+
+use PHPUnit\Framework;
+
+/**
+ * @covers \Ergebnis\PHPUnit\SlowTestDetector\Test\Fixture\Sleeper
+ */
+final class SleeperTest extends Framework\TestCase
+{
+}
diff --git a/test/EndToEnd/Version07/TestCase/WithoutTestMethods/phpunit.xml b/test/EndToEnd/Version07/TestCase/WithoutTestMethods/phpunit.xml
new file mode 100644
index 00000000..69d49f03
--- /dev/null
+++ b/test/EndToEnd/Version07/TestCase/WithoutTestMethods/phpunit.xml
@@ -0,0 +1,34 @@
+<phpunit
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/7.5/phpunit.xsd"
+    beStrictAboutChangesToGlobalState="true"
+    beStrictAboutOutputDuringTests="true"
+    beStrictAboutTestsThatDoNotTestAnything="true"
+    beStrictAboutTodoAnnotatedTests="true"
+    bootstrap="../../../../../vendor/autoload.php"
+    colors="true"
+    columns="max"
+    forceCoversAnnotation="true"
+    stopOnError="false"
+    stopOnFailure="false"
+    stopOnIncomplete="false"
+    stopOnSkipped="false"
+    verbose="true"
+>
+    <extensions>
+        <extension class="Ergebnis\PHPUnit\SlowTestDetector\Extension">
+            <arguments>
+                <array>
+                    <element key="maximum-duration">
+                        <integer>100</integer>
+                    </element>
+                </array>
+            </arguments>
+        </extension>
+    </extensions>
+    <testsuites>
+        <testsuite name="Unit Tests">
+            <directory>.</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>
diff --git a/test/EndToEnd/Version07/TestCase/WithoutTestMethods/test.phpt b/test/EndToEnd/Version07/TestCase/WithoutTestMethods/test.phpt
new file mode 100644
index 00000000..d0002455
--- /dev/null
+++ b/test/EndToEnd/Version07/TestCase/WithoutTestMethods/test.phpt
@@ -0,0 +1,20 @@
+--TEST--
+With a test case that has no test methods
+--FILE--
+<?php
+
+declare(strict_types=1);
+
+use PHPUnit\TextUI;
+
+$_SERVER['argv'][] = '--configuration=test/EndToEnd/Version07/TestCase/WithoutTestMethods/phpunit.xml';
+
+require_once __DIR__ . '/../../../../../vendor/autoload.php';
+
+PHPUnit\TextUI\Command::main();
+--EXPECTF--
+%a
+
+W                                                                   1 / 1 (100%)
+
+%a
diff --git a/test/EndToEnd/Version08/TestCase/WithoutTestMethods/SleeperTest.php b/test/EndToEnd/Version08/TestCase/WithoutTestMethods/SleeperTest.php
new file mode 100644
index 00000000..70848d6f
--- /dev/null
+++ b/test/EndToEnd/Version08/TestCase/WithoutTestMethods/SleeperTest.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Copyright (c) 2021-2025 Andreas Möller
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE.md file that was distributed with this source code.
+ *
+ * @see https://github.com/ergebnis/phpunit-slow-test-detector
+ */
+
+namespace Ergebnis\PHPUnit\SlowTestDetector\Test\EndToEnd\Version08\TestCase\WithoutTestMethods;
+
+use PHPUnit\Framework;
+
+/**
+ * @covers \Ergebnis\PHPUnit\SlowTestDetector\Test\Fixture\Sleeper
+ */
+final class SleeperTest extends Framework\TestCase
+{
+}
diff --git a/test/EndToEnd/Version08/TestCase/WithoutTestMethods/phpunit.xml b/test/EndToEnd/Version08/TestCase/WithoutTestMethods/phpunit.xml
new file mode 100644
index 00000000..c7b6adaa
--- /dev/null
+++ b/test/EndToEnd/Version08/TestCase/WithoutTestMethods/phpunit.xml
@@ -0,0 +1,36 @@
+<phpunit
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/8.5/phpunit.xsd"
+    beStrictAboutChangesToGlobalState="true"
+    beStrictAboutOutputDuringTests="true"
+    beStrictAboutTestsThatDoNotTestAnything="true"
+    beStrictAboutTodoAnnotatedTests="true"
+    bootstrap="../../../../../vendor/autoload.php"
+    cacheResult="false"
+    colors="true"
+    columns="max"
+    executionOrder="default"
+    forceCoversAnnotation="true"
+    stopOnError="false"
+    stopOnFailure="false"
+    stopOnIncomplete="false"
+    stopOnSkipped="false"
+    verbose="true"
+>
+    <extensions>
+        <extension class="Ergebnis\PHPUnit\SlowTestDetector\Extension">
+            <arguments>
+                <array>
+                    <element key="maximum-duration">
+                        <integer>100</integer>
+                    </element>
+                </array>
+            </arguments>
+        </extension>
+    </extensions>
+    <testsuites>
+        <testsuite name="Unit Tests">
+            <directory>.</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>
diff --git a/test/EndToEnd/Version08/TestCase/WithoutTestMethods/test.phpt b/test/EndToEnd/Version08/TestCase/WithoutTestMethods/test.phpt
new file mode 100644
index 00000000..3706c358
--- /dev/null
+++ b/test/EndToEnd/Version08/TestCase/WithoutTestMethods/test.phpt
@@ -0,0 +1,20 @@
+--TEST--
+With a test case that has no test methods
+--FILE--
+<?php
+
+declare(strict_types=1);
+
+use PHPUnit\TextUI;
+
+$_SERVER['argv'][] = '--configuration=test/EndToEnd/Version08/TestCase/WithoutTestMethods/phpunit.xml';
+
+require_once __DIR__ . '/../../../../../vendor/autoload.php';
+
+PHPUnit\TextUI\Command::main();
+--EXPECTF--
+%a
+
+W                                                                   1 / 1 (100%)
+
+%a
diff --git a/test/EndToEnd/Version09/TestCase/WithoutTestMethods/SleeperTest.php b/test/EndToEnd/Version09/TestCase/WithoutTestMethods/SleeperTest.php
new file mode 100644
index 00000000..5b218a37
--- /dev/null
+++ b/test/EndToEnd/Version09/TestCase/WithoutTestMethods/SleeperTest.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Copyright (c) 2021-2025 Andreas Möller
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE.md file that was distributed with this source code.
+ *
+ * @see https://github.com/ergebnis/phpunit-slow-test-detector
+ */
+
+namespace Ergebnis\PHPUnit\SlowTestDetector\Test\EndToEnd\Version09\TestCase\WithoutTestMethods;
+
+use PHPUnit\Framework;
+
+/**
+ * @covers \Ergebnis\PHPUnit\SlowTestDetector\Test\Fixture\Sleeper
+ */
+final class SleeperTest extends Framework\TestCase
+{
+}
diff --git a/test/EndToEnd/Version09/TestCase/WithoutTestMethods/phpunit.xml b/test/EndToEnd/Version09/TestCase/WithoutTestMethods/phpunit.xml
new file mode 100644
index 00000000..7f7ff83b
--- /dev/null
+++ b/test/EndToEnd/Version09/TestCase/WithoutTestMethods/phpunit.xml
@@ -0,0 +1,36 @@
+<phpunit
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.0/phpunit.xsd"
+    beStrictAboutChangesToGlobalState="true"
+    beStrictAboutOutputDuringTests="true"
+    beStrictAboutTestsThatDoNotTestAnything="true"
+    beStrictAboutTodoAnnotatedTests="true"
+    bootstrap="../../../../../vendor/autoload.php"
+    cacheResult="false"
+    colors="true"
+    columns="max"
+    executionOrder="default"
+    forceCoversAnnotation="true"
+    stopOnError="false"
+    stopOnFailure="false"
+    stopOnIncomplete="false"
+    stopOnSkipped="false"
+    verbose="true"
+>
+    <extensions>
+        <extension class="Ergebnis\PHPUnit\SlowTestDetector\Extension">
+            <arguments>
+                <array>
+                    <element key="maximum-duration">
+                        <integer>100</integer>
+                    </element>
+                </array>
+            </arguments>
+        </extension>
+    </extensions>
+    <testsuites>
+        <testsuite name="Unit Tests">
+            <directory>.</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>
diff --git a/test/EndToEnd/Version09/TestCase/WithoutTestMethods/test.phpt b/test/EndToEnd/Version09/TestCase/WithoutTestMethods/test.phpt
new file mode 100644
index 00000000..25095267
--- /dev/null
+++ b/test/EndToEnd/Version09/TestCase/WithoutTestMethods/test.phpt
@@ -0,0 +1,20 @@
+--TEST--
+With a test case that has no test methods
+--FILE--
+<?php
+
+declare(strict_types=1);
+
+use PHPUnit\TextUI;
+
+$_SERVER['argv'][] = '--configuration=test/EndToEnd/Version09/TestCase/WithoutTestMethods/phpunit.xml';
+
+require_once __DIR__ . '/../../../../../vendor/autoload.php';
+
+PHPUnit\TextUI\Command::main();
+--EXPECTF--
+%a
+
+W                                                                   1 / 1 (100%)
+
+%a
diff --git a/test/EndToEnd/Version10/TestCase/WithoutTestMethods/SleeperTest.php b/test/EndToEnd/Version10/TestCase/WithoutTestMethods/SleeperTest.php
new file mode 100644
index 00000000..c0bcdec1
--- /dev/null
+++ b/test/EndToEnd/Version10/TestCase/WithoutTestMethods/SleeperTest.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Copyright (c) 2021-2025 Andreas Möller
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE.md file that was distributed with this source code.
+ *
+ * @see https://github.com/ergebnis/phpunit-slow-test-detector
+ */
+
+namespace Ergebnis\PHPUnit\SlowTestDetector\Test\EndToEnd\Version10\TestCase\WithoutTestMethods;
+
+use PHPUnit\Framework;
+
+/**
+ * @covers \Ergebnis\PHPUnit\SlowTestDetector\Test\Fixture\Sleeper
+ */
+final class SleeperTest extends Framework\TestCase
+{
+}
diff --git a/test/EndToEnd/Version10/TestCase/WithoutTestMethods/phpunit.xml b/test/EndToEnd/Version10/TestCase/WithoutTestMethods/phpunit.xml
new file mode 100644
index 00000000..702c6e9b
--- /dev/null
+++ b/test/EndToEnd/Version10/TestCase/WithoutTestMethods/phpunit.xml
@@ -0,0 +1,33 @@
+<phpunit
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.0/phpunit.xsd"
+    beStrictAboutChangesToGlobalState="true"
+    beStrictAboutOutputDuringTests="true"
+    beStrictAboutTestsThatDoNotTestAnything="true"
+    bootstrap="../../../../../vendor/autoload.php"
+    cacheResult="false"
+    colors="true"
+    columns="max"
+    displayDetailsOnIncompleteTests="true"
+    displayDetailsOnSkippedTests="true"
+    displayDetailsOnTestsThatTriggerDeprecations="true"
+    displayDetailsOnTestsThatTriggerErrors="true"
+    displayDetailsOnTestsThatTriggerNotices="true"
+    displayDetailsOnTestsThatTriggerWarnings="true"
+    executionOrder="default"
+    stopOnError="false"
+    stopOnFailure="false"
+    stopOnIncomplete="false"
+    stopOnSkipped="false"
+>
+    <extensions>
+        <bootstrap class="Ergebnis\PHPUnit\SlowTestDetector\Extension">
+            <parameter name="maximum-duration" value="100"/>
+        </bootstrap>
+    </extensions>
+    <testsuites>
+        <testsuite name="Unit Tests">
+            <directory>.</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>
diff --git a/test/EndToEnd/Version10/TestCase/WithoutTestMethods/test.phpt b/test/EndToEnd/Version10/TestCase/WithoutTestMethods/test.phpt
new file mode 100644
index 00000000..93985332
--- /dev/null
+++ b/test/EndToEnd/Version10/TestCase/WithoutTestMethods/test.phpt
@@ -0,0 +1,24 @@
+--TEST--
+With a test case that has no test methods
+--FILE--
+<?php
+
+declare(strict_types=1);
+
+use PHPUnit\TextUI;
+
+$_SERVER['argv'][] = '--configuration=test/EndToEnd/Version10/TestCase/WithoutTestMethods/phpunit.xml';
+
+require_once __DIR__ . '/../../../../../vendor/autoload.php';
+
+$application = new TextUI\Application();
+
+$application->run($_SERVER['argv']);
+--EXPECTF--
+%a
+
+There was 1 PHPUnit%swarning:
+
+1) No tests found in class "Ergebnis\PHPUnit\SlowTestDetector\Test\EndToEnd\Version10\TestCase\WithoutTestMethods\SleeperTest".
+
+No tests executed!
diff --git a/test/EndToEnd/Version11/TestCase/WithoutTestMethods/SleeperTest.php b/test/EndToEnd/Version11/TestCase/WithoutTestMethods/SleeperTest.php
new file mode 100644
index 00000000..724f4ef9
--- /dev/null
+++ b/test/EndToEnd/Version11/TestCase/WithoutTestMethods/SleeperTest.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Copyright (c) 2021-2025 Andreas Möller
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE.md file that was distributed with this source code.
+ *
+ * @see https://github.com/ergebnis/phpunit-slow-test-detector
+ */
+
+namespace Ergebnis\PHPUnit\SlowTestDetector\Test\EndToEnd\Version11\TestCase\WithoutTestMethods;
+
+use PHPUnit\Framework;
+
+/**
+ * @covers \Ergebnis\PHPUnit\SlowTestDetector\Test\Fixture\Sleeper
+ */
+final class SleeperTest extends Framework\TestCase
+{
+}
diff --git a/test/EndToEnd/Version11/TestCase/WithoutTestMethods/phpunit.xml b/test/EndToEnd/Version11/TestCase/WithoutTestMethods/phpunit.xml
new file mode 100644
index 00000000..fb1f0d84
--- /dev/null
+++ b/test/EndToEnd/Version11/TestCase/WithoutTestMethods/phpunit.xml
@@ -0,0 +1,33 @@
+<phpunit
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/11.0/phpunit.xsd"
+    beStrictAboutChangesToGlobalState="true"
+    beStrictAboutOutputDuringTests="true"
+    beStrictAboutTestsThatDoNotTestAnything="true"
+    bootstrap="../../../../../vendor/autoload.php"
+    cacheResult="false"
+    colors="true"
+    columns="max"
+    displayDetailsOnIncompleteTests="true"
+    displayDetailsOnSkippedTests="true"
+    displayDetailsOnTestsThatTriggerDeprecations="true"
+    displayDetailsOnTestsThatTriggerErrors="true"
+    displayDetailsOnTestsThatTriggerNotices="true"
+    displayDetailsOnTestsThatTriggerWarnings="true"
+    executionOrder="default"
+    stopOnError="false"
+    stopOnFailure="false"
+    stopOnIncomplete="false"
+    stopOnSkipped="false"
+>
+    <extensions>
+        <bootstrap class="Ergebnis\PHPUnit\SlowTestDetector\Extension">
+            <parameter name="maximum-duration" value="100"/>
+        </bootstrap>
+    </extensions>
+    <testsuites>
+        <testsuite name="Unit Tests">
+            <directory>.</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>
diff --git a/test/EndToEnd/Version11/TestCase/WithoutTestMethods/test.phpt b/test/EndToEnd/Version11/TestCase/WithoutTestMethods/test.phpt
new file mode 100644
index 00000000..82e38596
--- /dev/null
+++ b/test/EndToEnd/Version11/TestCase/WithoutTestMethods/test.phpt
@@ -0,0 +1,24 @@
+--TEST--
+With a test case that has no test methods
+--FILE--
+<?php
+
+declare(strict_types=1);
+
+use PHPUnit\TextUI;
+
+$_SERVER['argv'][] = '--configuration=test/EndToEnd/Version11/TestCase/WithoutTestMethods/phpunit.xml';
+
+require_once __DIR__ . '/../../../../../vendor/autoload.php';
+
+$application = new TextUI\Application();
+
+$application->run($_SERVER['argv']);
+--EXPECTF--
+%a
+
+There was 1 PHPUnit test runner warning:
+
+1) No tests found in class "Ergebnis\PHPUnit\SlowTestDetector\Test\EndToEnd\Version11\TestCase\WithoutTestMethods\SleeperTest".
+
+No tests executed!
diff --git a/test/EndToEnd/Version12/TestCase/WithoutTestMethods/SleeperTest.php b/test/EndToEnd/Version12/TestCase/WithoutTestMethods/SleeperTest.php
new file mode 100644
index 00000000..2aafc1b6
--- /dev/null
+++ b/test/EndToEnd/Version12/TestCase/WithoutTestMethods/SleeperTest.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Copyright (c) 2021-2025 Andreas Möller
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE.md file that was distributed with this source code.
+ *
+ * @see https://github.com/ergebnis/phpunit-slow-test-detector
+ */
+
+namespace Ergebnis\PHPUnit\SlowTestDetector\Test\EndToEnd\Version12\TestCase\WithoutTestMethods;
+
+use PHPUnit\Framework;
+
+/**
+ * @covers \Ergebnis\PHPUnit\SlowTestDetector\Test\Fixture\Sleeper
+ */
+final class SleeperTest extends Framework\TestCase
+{
+}
diff --git a/test/EndToEnd/Version12/TestCase/WithoutTestMethods/phpunit.xml b/test/EndToEnd/Version12/TestCase/WithoutTestMethods/phpunit.xml
new file mode 100644
index 00000000..f3c8d23f
--- /dev/null
+++ b/test/EndToEnd/Version12/TestCase/WithoutTestMethods/phpunit.xml
@@ -0,0 +1,33 @@
+<phpunit
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/12.0/phpunit.xsd"
+    beStrictAboutChangesToGlobalState="true"
+    beStrictAboutOutputDuringTests="true"
+    beStrictAboutTestsThatDoNotTestAnything="true"
+    bootstrap="../../../../../vendor/autoload.php"
+    cacheResult="false"
+    colors="true"
+    columns="max"
+    displayDetailsOnIncompleteTests="true"
+    displayDetailsOnSkippedTests="true"
+    displayDetailsOnTestsThatTriggerDeprecations="true"
+    displayDetailsOnTestsThatTriggerErrors="true"
+    displayDetailsOnTestsThatTriggerNotices="true"
+    displayDetailsOnTestsThatTriggerWarnings="true"
+    executionOrder="default"
+    stopOnError="false"
+    stopOnFailure="false"
+    stopOnIncomplete="false"
+    stopOnSkipped="false"
+>
+    <extensions>
+        <bootstrap class="Ergebnis\PHPUnit\SlowTestDetector\Extension">
+            <parameter name="maximum-duration" value="100"/>
+        </bootstrap>
+    </extensions>
+    <testsuites>
+        <testsuite name="Unit Tests">
+            <directory>.</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>
diff --git a/test/EndToEnd/Version12/TestCase/WithoutTestMethods/test.phpt b/test/EndToEnd/Version12/TestCase/WithoutTestMethods/test.phpt
new file mode 100644
index 00000000..b55f3a1a
--- /dev/null
+++ b/test/EndToEnd/Version12/TestCase/WithoutTestMethods/test.phpt
@@ -0,0 +1,24 @@
+--TEST--
+With a test case that has no test methods
+--FILE--
+<?php
+
+declare(strict_types=1);
+
+use PHPUnit\TextUI;
+
+$_SERVER['argv'][] = '--configuration=test/EndToEnd/Version12/TestCase/WithoutTestMethods/phpunit.xml';
+
+require_once __DIR__ . '/../../../../../vendor/autoload.php';
+
+$application = new TextUI\Application();
+
+$application->run($_SERVER['argv']);
+--EXPECTF--
+%a
+
+There was 1 PHPUnit test runner warning:
+
+1) No tests found in class "Ergebnis\PHPUnit\SlowTestDetector\Test\EndToEnd\Version12\TestCase\WithoutTestMethods\SleeperTest".
+
+No tests executed!