diff --git a/tests/Composer/Test/Fixtures/installer/github-issues-7665.test b/tests/Composer/Test/Fixtures/installer-slow/github-issues-7665.test
similarity index 100%
rename from tests/Composer/Test/Fixtures/installer/github-issues-7665.test
rename to tests/Composer/Test/Fixtures/installer-slow/github-issues-7665.test
diff --git a/tests/Composer/Test/InstallerTest.php b/tests/Composer/Test/InstallerTest.php
index 88fa31f6e..39bfc730f 100644
--- a/tests/Composer/Test/InstallerTest.php
+++ b/tests/Composer/Test/InstallerTest.php
@@ -184,6 +184,15 @@ class InstallerTest extends TestCase
         return $cases;
     }
 
+    /**
+     * @group slow
+     * @dataProvider getSlowIntegrationTests
+     */
+    public function testSlowIntegration($file, $message, $condition, $composerConfig, $lock, $installed, $run, $expectLock, $expectInstalled, $expectOutput, $expect, $expectResult)
+    {
+        return $this->testIntegration($file, $message, $condition, $composerConfig, $lock, $installed, $run, $expectLock, $expectInstalled, $expectOutput, $expect, $expectResult);
+    }
+
     /**
      * @dataProvider getIntegrationTests
      */
@@ -379,9 +388,19 @@ class InstallerTest extends TestCase
         }
     }
 
+    public function getSlowIntegrationTests()
+    {
+        return $this->loadIntegrationTests('installer-slow/');
+    }
+
     public function getIntegrationTests()
     {
-        $fixturesDir = realpath(__DIR__.'/Fixtures/installer/');
+        return $this->loadIntegrationTests('installer/');
+    }
+
+    public function loadIntegrationTests($path)
+    {
+        $fixturesDir = realpath(__DIR__.'/Fixtures/'.$path);
         $tests = array();
 
         foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($fixturesDir), \RecursiveIteratorIterator::LEAVES_ONLY) as $file) {