diff --git a/src/MergePlugin.php b/src/MergePlugin.php
index a9af5b6..49b3117 100644
--- a/src/MergePlugin.php
+++ b/src/MergePlugin.php
@@ -157,8 +157,6 @@ public static function getSubscribedEvents()
                 ['onInit', self::CALLBACK_PRIORITY],
             PackageEvents::POST_PACKAGE_INSTALL =>
                 ['onPostPackageInstall', self::CALLBACK_PRIORITY],
-            ScriptEvents::POST_INSTALL_CMD =>
-                ['onPostInstallOrUpdate', self::CALLBACK_PRIORITY],
             ScriptEvents::POST_UPDATE_CMD =>
                 ['onPostInstallOrUpdate', self::CALLBACK_PRIORITY],
             ScriptEvents::PRE_AUTOLOAD_DUMP =>
diff --git a/tests/phpunit/MergePluginTest.php b/tests/phpunit/MergePluginTest.php
index ff1375a..b09d957 100644
--- a/tests/phpunit/MergePluginTest.php
+++ b/tests/phpunit/MergePluginTest.php
@@ -83,14 +83,13 @@ public function testSubscribedEvents()
     {
         $subscriptions = MergePlugin::getSubscribedEvents();
 
-        $this->assertCount(7, $subscriptions);
+        $this->assertCount(6, $subscriptions);
 
         $this->assertArrayHasKey(PluginEvents::INIT, $subscriptions);
         $this->assertArrayHasKey(ScriptEvents::PRE_INSTALL_CMD, $subscriptions);
         $this->assertArrayHasKey(ScriptEvents::PRE_UPDATE_CMD, $subscriptions);
         $this->assertArrayHasKey(ScriptEvents::PRE_AUTOLOAD_DUMP, $subscriptions);
         $this->assertArrayHasKey(PackageEvents::POST_PACKAGE_INSTALL, $subscriptions);
-        $this->assertArrayHasKey(ScriptEvents::POST_INSTALL_CMD, $subscriptions);
         $this->assertArrayHasKey(ScriptEvents::POST_UPDATE_CMD, $subscriptions);
     }