diff --git a/src/TextUI/Configuration/SourceMapper.php b/src/TextUI/Configuration/SourceMapper.php
index cbe8aa4c65..c8108a43bb 100644
--- a/src/TextUI/Configuration/SourceMapper.php
+++ b/src/TextUI/Configuration/SourceMapper.php
@@ -40,8 +40,10 @@ public function map(Source $source): array
 
         $files = [];
 
-        foreach ($source->includeDirectories() as $directory) {
-            foreach ((new FileIteratorFacade)->getFilesAsArray($directory->path(), $directory->suffix(), $directory->prefix()) as $file) {
+        $directories = $this->aggregateDirectories($source->includeDirectories());
+
+        foreach ($directories as $path => [$prefixes, $suffixes]) {
+            foreach ((new FileIteratorFacade)->getFilesAsArray($path, $suffixes, $prefixes) as $file) {
                 $file = realpath($file);
 
                 if (!$file) {
@@ -62,8 +64,10 @@ public function map(Source $source): array
             $files[$file] = true;
         }
 
-        foreach ($source->excludeDirectories() as $directory) {
-            foreach ((new FileIteratorFacade)->getFilesAsArray($directory->path(), $directory->suffix(), $directory->prefix()) as $file) {
+        $directories = $this->aggregateDirectories($source->excludeDirectories());
+
+        foreach ($directories as $path => [$prefixes, $suffixes]) {
+            foreach ((new FileIteratorFacade)->getFilesAsArray($path, $suffixes, $prefixes) as $file) {
                 $file = realpath($file);
 
                 if (!$file) {
@@ -96,4 +100,33 @@ public function map(Source $source): array
 
         return $files;
     }
+
+    /**
+     * @return array<string,array{list<string>,list<string>}>
+     */
+    private function aggregateDirectories(FilterDirectoryCollection $directories): array
+    {
+        $aggregated = [];
+
+        foreach ($directories as $directory) {
+            if (!isset($aggregated[$directory->path()])) {
+                $aggregated[$directory->path()] = [
+                    0 => [],
+                    1 => [],
+                ];
+            }
+            $prefix = $directory->prefix();
+
+            if ($prefix !== '') {
+                $aggregated[$directory->path()][0][] = $prefix;
+            }
+            $suffix = $directory->suffix();
+
+            if ($suffix !== '') {
+                $aggregated[$directory->path()][1][] = $suffix;
+            }
+        }
+
+        return $aggregated;
+    }
 }
diff --git a/tests/unit/TextUI/SourceMapperTest.php b/tests/unit/TextUI/SourceMapperTest.php
index a2d34e9000..d36d342e9c 100644
--- a/tests/unit/TextUI/SourceMapperTest.php
+++ b/tests/unit/TextUI/SourceMapperTest.php
@@ -270,6 +270,82 @@ public static function provider(): Generator
                 ),
             ),
         ];
+
+        yield 'files included using same directory and different suffixes' => [
+            [
+                self::fixturePath('a/c/Prefix.php')              => true,
+                self::fixturePath('a/c/d/Prefix.php')            => true,
+                self::fixturePath('b/e/PrefixExampleSuffix.php') => true,
+            ],
+            self::createSource(
+                includeDirectories: FilterDirectoryCollection::fromArray(
+                    [
+                        new FilterDirectory(
+                            self::fixturePath(),
+                            '',
+                            'ExampleSuffix.php',
+                        ),
+                        new FilterDirectory(
+                            self::fixturePath(),
+                            '',
+                            'Prefix.php',
+                        ),
+                    ],
+                ),
+            ),
+        ];
+
+        yield 'files included using same directory and different prefixes' => [
+            [
+                self::fixturePath('a/c/Suffix.php')              => true,
+                self::fixturePath('a/c/d/Suffix.php')            => true,
+                self::fixturePath('b/e/PrefixExampleSuffix.php') => true,
+            ],
+            self::createSource(
+                includeDirectories: FilterDirectoryCollection::fromArray(
+                    [
+                        new FilterDirectory(
+                            self::fixturePath(),
+                            'Suffix',
+                            '.php',
+                        ),
+                        new FilterDirectory(
+                            self::fixturePath(),
+                            'PrefixExample',
+                            '.php',
+                        ),
+                    ],
+                ),
+            ),
+        ];
+
+        yield 'files excluded using same directory and different prefixes' => [
+            [
+            ],
+            self::createSource(
+                includeDirectories: FilterDirectoryCollection::fromArray([
+                    new FilterDirectory(
+                        self::fixturePath(),
+                        '',
+                        '.php',
+                    ),
+                ]),
+                excludeDirectories: FilterDirectoryCollection::fromArray(
+                    [
+                        new FilterDirectory(
+                            self::fixturePath(),
+                            'Prefix',
+                            '.php',
+                        ),
+                        new FilterDirectory(
+                            self::fixturePath(),
+                            'Suffix',
+                            '.php',
+                        ),
+                    ],
+                ),
+            ),
+        ];
     }
 
     public static function fixturePath(?string $subPath = null): string