diff --git a/src/__tests__/ArcanistInfrastructureTestCase.php b/src/__tests__/ArcanistInfrastructureTestCase.php
index e1d6bb45..fa28b5df 100644
--- a/src/__tests__/ArcanistInfrastructureTestCase.php
+++ b/src/__tests__/ArcanistInfrastructureTestCase.php
@@ -1,6 +1,7 @@
 <?php
 
 final class ArcanistInfrastructureTestCase extends ArcanistTestCase {
+
   /**
    * This is more of an acceptance test case instead of a unit test. It verifies
    * that all symbols can be loaded correctly. It can catch problems like
@@ -10,4 +11,27 @@ final class ArcanistInfrastructureTestCase extends ArcanistTestCase {
     id(new PhutilSymbolLoader())->selectAndLoadSymbols();
     $this->assertTrue(true);
   }
+
+  /**
+   * This is more of an acceptance test case instead of a unit test. It verifies
+   * that all the library map is up-to-date.
+   */
+  public function testLibraryMap() {
+    $root = phutil_get_library_root('arcanist');
+
+    $new_library_map = id(new PhutilLibraryMapBuilder($root))
+      ->setQuiet(true)
+      ->setDryRun(true)
+      ->buildMap();
+
+    $bootloader = PhutilBootloader::getInstance();
+    $old_library_map = $bootloader->getLibraryMap('arcanist');
+    unset($old_library_map[PhutilLibraryMapBuilder::LIBRARY_MAP_VERSION_KEY]);
+
+    $this->assertEqual(
+      $new_library_map,
+      $old_library_map,
+      'The library map does not appear to be up-to-date. Try '.
+      'rebuilding the map with `arc liberate`.');
+  }
 }