diff --git a/composer-dependency-analyser.php b/composer-dependency-analyser.php
index f0220f76b..81ae3ef2b 100644
--- a/composer-dependency-analyser.php
+++ b/composer-dependency-analyser.php
@@ -1,10 +1,20 @@
 <?php declare(strict_types = 1);
 
 use LastDragon_ru\LaraASP\Dev\App\Example;
+use ShipMonk\ComposerDependencyAnalyser\CliOptions;
+use ShipMonk\ComposerDependencyAnalyser\ComposerJson;
 use ShipMonk\ComposerDependencyAnalyser\Config\Configuration;
 use ShipMonk\ComposerDependencyAnalyser\Config\ErrorType;
+use ShipMonk\ComposerDependencyAnalyser\Initializer;
+use ShipMonk\ComposerDependencyAnalyser\Path;
 
-return (new Configuration())
+// Assertions
+assert(isset($this) && $this instanceof Initializer);
+assert(isset($options) && $options instanceof CliOptions);
+assert(isset($composerJson) && $composerJson instanceof ComposerJson);
+
+// General
+$config = (new Configuration())
     ->enableAnalysisOfUnusedDevDependencies()
     ->disableReportingUnmatchedIgnores()
     ->ignoreUnknownClasses([
@@ -16,3 +26,51 @@
     ->ignoreErrorsOnPackage('orchestra/testbench-core', [ErrorType::SHADOW_DEPENDENCY])
     ->ignoreErrorsOnPackage('phpstan/phpstan', [ErrorType::SHADOW_DEPENDENCY])
     ->ignoreErrorsOnPackage('laravel/scout', [ErrorType::DEV_DEPENDENCY_IN_PROD]);
+
+// Configure paths
+//
+// In our case, tests located inside the same directory with class and
+// `exclude-from-classmap` is used to exclude them from the class map.
+// So we need to mark these excluded files as "dev".
+$path     = Path::resolve($this->cwd, ($options->composerJson ?? 'composer.json'));
+$json     = (string) file_get_contents($path);
+$json     = json_decode($json, true, JSON_THROW_ON_ERROR);
+$excluded = $json['autoload']['exclude-from-classmap'] ?? [];
+
+if ($excluded) {
+    $config = $config->disableComposerAutoloadPathScan();
+    $regexp = array_map(
+        static function (string $exclude) use ($path): string {
+            // Similar to how composer process it, but not the exact match.
+            $exclude = dirname($path)."/{$exclude}";
+            $exclude = preg_replace('{/+}', '/', preg_quote(trim(strtr($exclude, '\\', '/'), '/')));
+            $exclude = strtr($exclude, ['\\*\\*' => '.+?', '\\*' => '[^/]+?']);
+
+            return $exclude;
+        },
+        $excluded,
+    );
+    $regexp = '{('.implode(')|(', $regexp).')}';
+
+    foreach ($composerJson->autoloadPaths as $absolutePath => $isDevPath) {
+        if ($isDevPath) {
+            $config = $config->addPathToScan($absolutePath, $isDevPath);
+        } elseif (is_file($absolutePath)) {
+            $config = $config->addPathToScan($absolutePath, (bool) preg_match($regexp, $absolutePath));
+        } else {
+            $iterator = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($absolutePath));
+
+            foreach ($iterator as $entry) {
+                if (!$entry->isFile() || !in_array($entry->getExtension(), $config->getFileExtensions(), true)) {
+                    continue;
+                }
+
+                $entryPath = $entry->getPathname();
+                $config    = $config->addPathToScan($entryPath, (bool) preg_match($regexp, $entryPath));
+            }
+        }
+    }
+}
+
+// Return
+return $config;