diff --git a/tests/PluginTest.php b/tests/PluginTest.php
index 7046491..87f43aa 100644
--- a/tests/PluginTest.php
+++ b/tests/PluginTest.php
@@ -8,6 +8,7 @@
 namespace DrupalComposer\DrupalScaffold\Tests;
 
 use Composer\Util\Filesystem;
+use Symfony\Component\Finder\Finder;
 
 /**
  * Tests composer plugin functionality.
@@ -99,6 +100,24 @@ public function testComposerInstallAndUpdate() {
     $this->assertNotEquals($mtime_after, $mtime_touched, 'Scaffold file was modified by custom command.');
   }
 
+  /**
+   * Tests a simple composer install with composer.lock in place
+   */
+  public function testComposerInstallWithLock() {
+    // Prepare composer.lock file
+    $exampleScaffoldFile = $this->tmpDir . DIRECTORY_SEPARATOR . 'index.php';
+    $this->composer('install');
+    $finder = new Finder();
+    $finder->depth('== 0')->ignoreDotFiles(FALSE)->notName('/^composer\.(lock|json)$/')->in($this->tmpDir);
+    foreach ($finder as $file) {
+      $this->fs->remove($file->getRealPath());
+    }
+    $this->assertFileNotExists($exampleScaffoldFile, 'Scaffold file should not be exist.');
+    $this->composer('install');
+    $this->assertFileExists($this->tmpDir . DIRECTORY_SEPARATOR . 'core', 'Drupal core is installed.');
+    $this->assertFileExists($exampleScaffoldFile, 'Scaffold file should be automatically installed.');
+  }
+
   /**
    * Writes the default composer json to the temp direcoty.
    */