diff --git a/src/File/SkipPathMatcher.php b/src/File/SkipPathMatcher.php
index 5914b7f3..ce122bd1 100644
--- a/src/File/SkipPathMatcher.php
+++ b/src/File/SkipPathMatcher.php
@@ -27,7 +27,8 @@
  * An absolute path therefore matches only that absolute location; it is not
  * re-anchored under the base path.
  *
- * A glob pattern is matched against both the absolute path and the base-relative path.
+ * A glob pattern is matched against both the absolute path and the base-relative path,
+ * and matching directories also skip their descendants.
  *
  * Instances are cached per (base path, skip paths) pair, ignoring skip path
  * order and duplicates, and memoise per-path
@@ -139,11 +140,17 @@ private function computeIsSkipped(string $path): bool
             : $normalisedPath;
 
         foreach ($this->patterns as $pattern) {
-            if (fnmatch($pattern, $normalisedPath) || fnmatch($pattern, $relativePath)) {
+            if ($this->matchesPattern($pattern, $normalisedPath) || $this->matchesPattern($pattern, $relativePath)) {
                 return true;
             }
         }
 
         return false;
     }
+
+    private function matchesPattern(string $pattern, string $path): bool
+    {
+        // Without FNM_PATHNAME, the appended wildcard also matches nested descendants.
+        return fnmatch($pattern, $path) || fnmatch($pattern . '/*', $path);
+    }
 }
diff --git a/tests/Analyser/AnalyserSkipPathsTest.php b/tests/Analyser/AnalyserSkipPathsTest.php
index 39619df9..df1fcb2a 100644
--- a/tests/Analyser/AnalyserSkipPathsTest.php
+++ b/tests/Analyser/AnalyserSkipPathsTest.php
@@ -7,14 +7,49 @@
 use Boundwize\StructArmed\Analyser\Analyser;
 use Boundwize\StructArmed\Architecture;
 use Boundwize\StructArmed\File\SkipPathMatcher;
+use Boundwize\StructArmed\Preset\Preset;
+use Boundwize\StructArmed\Preset\Presets\Psr4Preset;
 use Boundwize\StructArmed\Rule\Rules\Class_\MustBeFinalRule;
+use Boundwize\StructArmed\Tests\Support\TemporaryDirectoryCleanupTrait;
 use PHPUnit\Framework\Attributes\CoversClass;
 use PHPUnit\Framework\TestCase;
 
+use function file_put_contents;
+use function mkdir;
+
 #[CoversClass(Analyser::class)]
 #[CoversClass(SkipPathMatcher::class)]
 final class AnalyserSkipPathsTest extends TestCase
 {
+    use TemporaryDirectoryCleanupTrait;
+
+    public function testPsr4RuleSpecificDirectoryGlobSkipsDescendants(): void
+    {
+        $basePath = $this->makeTemporaryDirectory('structarmed-psr4-skips');
+        file_put_contents($basePath . '/composer.json', '{"autoload-dev":{"psr-4":{"App\\\\":"tests/"}}}');
+
+        foreach (['functional/Core/Nested', 'unit', 'integration', 'functional/CoreExtra'] as $directory) {
+            mkdir($basePath . '/tests/' . $directory, 0777, true);
+            file_put_contents($basePath . '/tests/' . $directory . '/Wrong.php', '<?php class Mismatch {}');
+        }
+
+        $architecture = Architecture::define()
+            ->skip([
+                Psr4Preset::CLASSES_MUST_MATCH_COMPOSER => [
+                    'tests/**/Core',
+                    'tests/unit',
+                    'tests/integration',
+                ],
+            ])
+            ->withPreset(Preset::PSR4());
+
+        $violations = (new Analyser($basePath))->analyse($architecture)
+            ->forRule(Psr4Preset::CLASSES_MUST_MATCH_COMPOSER);
+
+        $this->assertCount(1, $violations);
+        $this->assertStringEndsWith('/tests/functional/CoreExtra/Wrong.php', $violations[0]->file);
+    }
+
     public function testAnalyserComposesGlobalAndRuleSpecificSkipsForClassRules(): void
     {
         $architecture = Architecture::define()
diff --git a/tests/File/SkipPathMatcherTest.php b/tests/File/SkipPathMatcherTest.php
index 2afff9ed..bb4d18e1 100644
--- a/tests/File/SkipPathMatcherTest.php
+++ b/tests/File/SkipPathMatcherTest.php
@@ -59,6 +59,19 @@ public function testCompileReturnsDifferentInstanceForDifferentBasePath(): void
         );
     }
 
+    public function testDirectoryGlobSkipsDescendantsWithoutMatchingSiblingPrefixes(): void
+    {
+        foreach (['tests/**/Core', '/project/tests/**/Core'] as $pattern) {
+            $matcher = SkipPathMatcher::compile('/project', [$pattern]);
+
+            $this->assertTrue($matcher->isSkipped('/project/tests/functional/Core'));
+            $this->assertTrue($matcher->isSkipped('/project/tests/functional/Core/Foo.php'));
+            $this->assertTrue($matcher->isSkipped('/project/tests/functional/Core/Nested/Foo.php'));
+            $this->assertFalse($matcher->isSkipped('/project/tests/functional/CoreExtra/Foo.php'));
+            $this->assertFalse($matcher->isSkipped('/other/tests/functional/Core/Foo.php'));
+        }
+    }
+
     public function testLeadingSlashSkipPathMatchesOnlyTheAbsoluteLocation(): void
     {
         $skipPathMatcher = SkipPathMatcher::compile('/project', ['/vendor']);