diff --git a/lib/composer/InstalledVersions.php b/lib/composer/InstalledVersions.php
index 07b32ed6ef..2052022fd8 100644
--- a/lib/composer/InstalledVersions.php
+++ b/lib/composer/InstalledVersions.php
@@ -26,12 +26,23 @@ use Composer\Semver\VersionParser;
  */
 class InstalledVersions
 {
+    /**
+     * @var string|null if set (by reflection by Composer), this should be set to the path where this class is being copied to
+     * @internal
+     */
+    private static $selfDir = null;
+
     /**
      * @var mixed[]|null
      * @psalm-var array{root: array{name: string, pretty_version: string, version: string, reference: string|null, type: string, install_path: string, aliases: string[], dev: bool}, versions: array<string, array{pretty_version?: string, version?: string, reference?: string|null, type?: string, install_path?: string, aliases?: string[], dev_requirement: bool, replaced?: string[], provided?: string[]}>}|array{}|null
      */
     private static $installed;
 
+    /**
+     * @var bool
+     */
+    private static $installedIsLocalDir;
+
     /**
      * @var bool|null
      */
@@ -309,6 +320,24 @@ class InstalledVersions
     {
         self::$installed = $data;
         self::$installedByVendor = array();
+
+        // when using reload, we disable the duplicate protection to ensure that self::$installed data is
+        // always returned, but we cannot know whether it comes from the installed.php in __DIR__ or not,
+        // so we have to assume it does not, and that may result in duplicate data being returned when listing
+        // all installed packages for example
+        self::$installedIsLocalDir = false;
+    }
+
+    /**
+     * @return string
+     */
+    private static function getSelfDir()
+    {
+        if (self::$selfDir === null) {
+            self::$selfDir = strtr(__DIR__, '\\', '/');
+        }
+
+        return self::$selfDir;
     }
 
     /**
@@ -325,7 +354,9 @@ class InstalledVersions
         $copiedLocalDir = false;
 
         if (self::$canGetVendors) {
+            $selfDir = self::getSelfDir();
             foreach (ClassLoader::getRegisteredLoaders() as $vendorDir => $loader) {
+                $vendorDir = strtr($vendorDir, '\\', '/');
                 if (isset(self::$installedByVendor[$vendorDir])) {
                     $installed[] = self::$installedByVendor[$vendorDir];
                 } elseif (is_file($vendorDir.'/composer/installed.php')) {
@@ -333,11 +364,14 @@ class InstalledVersions
                     $required = require $vendorDir.'/composer/installed.php';
                     self::$installedByVendor[$vendorDir] = $required;
                     $installed[] = $required;
-                    if (strtr($vendorDir.'/composer', '\\', '/') === strtr(__DIR__, '\\', '/')) {
+                    if (self::$installed === null && $vendorDir.'/composer' === $selfDir) {
                         self::$installed = $required;
-                        $copiedLocalDir = true;
+                        self::$installedIsLocalDir = true;
                     }
                 }
+                if (self::$installedIsLocalDir && $vendorDir.'/composer' === $selfDir) {
+                    $copiedLocalDir = true;
+                }
             }
         }
 
diff --git a/lib/composer/installed.php b/lib/composer/installed.php
index a8e30d8dbd..671486a685 100644
--- a/lib/composer/installed.php
+++ b/lib/composer/installed.php
@@ -1,9 +1,9 @@
 <?php return array(
     'root' => array(
         'name' => 'combodo/itop',
-        'pretty_version' => '1.0.0+no-version-set',
-        'version' => '1.0.0.0',
-        'reference' => null,
+        'pretty_version' => 'dev-develop',
+        'version' => 'dev-develop',
+        'reference' => '99cfe95c32885c98c66555bfec290df7d0e522a6',
         'type' => 'project',
         'install_path' => __DIR__ . '/../../',
         'aliases' => array(),
@@ -22,9 +22,9 @@
             'dev_requirement' => false,
         ),
         'combodo/itop' => array(
-            'pretty_version' => '1.0.0+no-version-set',
-            'version' => '1.0.0.0',
-            'reference' => null,
+            'pretty_version' => 'dev-develop',
+            'version' => 'dev-develop',
+            'reference' => '99cfe95c32885c98c66555bfec290df7d0e522a6',
             'type' => 'project',
             'install_path' => __DIR__ . '/../../',
             'aliases' => array(),