diff --git a/scripts/install/update_phabricator.sh b/scripts/install/update_phabricator.sh
index ebde400efe..42b716b001 100755
--- a/scripts/install/update_phabricator.sh
+++ b/scripts/install/update_phabricator.sh
@@ -25,6 +25,13 @@ fi
 (cd $ROOT/phabricator && git pull && git submodule update --init)
 
 
+### RUN TESTS ##################################################################
+
+# This is an acceptance test that makes sure all symboles can be loaded to
+# avoid issues like missing methods in descendants of abstract base class.
+(cd $ROOT/phabricator && ../arcanist/bin/arc unit src/infrastructure/__tests__/)
+
+
 ### GENERATE DOCUMENTATION #####################################################
 
 # This generates documentation if you have diviner/ checked out. You generally
@@ -38,6 +45,7 @@ then
   (cd $ROOT/phabricator && $ROOT/diviner/bin/diviner .)
 fi
 
+
 ### CYCLE APACHE AND DAEMONS ###################################################
 
 # Stop Apache. Depening on what system you're running, you may need to use
diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
index 70bda6f6ee..3f547eb798 100644
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -469,6 +469,7 @@ phutil_register_library_map(array(
     'PhabricatorIRCObjectNameHandler' => 'infrastructure/daemon/irc/handler/objectname',
     'PhabricatorIRCProtocolHandler' => 'infrastructure/daemon/irc/handler/protocol',
     'PhabricatorImageTransformer' => 'applications/files/transform',
+    'PhabricatorInfrastructureTestCase' => 'infrastructure/__tests__',
     'PhabricatorJavelinLinter' => 'infrastructure/lint/linter/javelin',
     'PhabricatorLintEngine' => 'infrastructure/lint/engine',
     'PhabricatorLiskDAO' => 'applications/base/storage/lisk',
@@ -1099,6 +1100,7 @@ phutil_register_library_map(array(
     'PhabricatorIRCBot' => 'PhabricatorDaemon',
     'PhabricatorIRCObjectNameHandler' => 'PhabricatorIRCHandler',
     'PhabricatorIRCProtocolHandler' => 'PhabricatorIRCHandler',
+    'PhabricatorInfrastructureTestCase' => 'PhabricatorTestCase',
     'PhabricatorJavelinLinter' => 'ArcanistLinter',
     'PhabricatorLintEngine' => 'PhutilLintEngine',
     'PhabricatorLiskDAO' => 'LiskDAO',
diff --git a/src/applications/diffusion/controller/symbol/__init__.php b/src/applications/diffusion/controller/symbol/__init__.php
index a89701bdea..d1babcd62e 100644
--- a/src/applications/diffusion/controller/symbol/__init__.php
+++ b/src/applications/diffusion/controller/symbol/__init__.php
@@ -9,6 +9,7 @@
 phutil_require_module('phabricator', 'aphront/response/redirect');
 phutil_require_module('phabricator', 'applications/diffusion/controller/base');
 phutil_require_module('phabricator', 'applications/diffusion/query/symbol');
+phutil_require_module('phabricator', 'applications/diffusion/request/base');
 phutil_require_module('phabricator', 'applications/repository/storage/arcanistproject');
 phutil_require_module('phabricator', 'applications/repository/storage/repository');
 phutil_require_module('phabricator', 'storage/queryfx');
diff --git a/src/infrastructure/__tests__/PhabricatorInfrastructureTestCase.php b/src/infrastructure/__tests__/PhabricatorInfrastructureTestCase.php
new file mode 100644
index 0000000000..75cddb51a0
--- /dev/null
+++ b/src/infrastructure/__tests__/PhabricatorInfrastructureTestCase.php
@@ -0,0 +1,34 @@
+<?php
+
+/*
+ * Copyright 2011 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+final class PhabricatorInfrastructureTestCase
+  extends PhabricatorTestCase {
+
+  /**
+   * This is more of an acceptance test case instead of a unittest. It verifies
+   * that all symbols can be loaded correctly. It can catch problem like missing
+   * methods in descendants of abstract base classes.
+   */
+  public function testEverythingImplemented() {
+    // Note that we don't have a try catch block around the following because,
+    // when it fails, it will cause a HPHP or PHP fatal which won't be caught
+    // by try catch.
+    $every_class = id(new PhutilSymbolLoader())->selectAndLoadSymbols();
+  }
+}
+
diff --git a/src/infrastructure/__tests__/__init__.php b/src/infrastructure/__tests__/__init__.php
new file mode 100644
index 0000000000..714cba8a31
--- /dev/null
+++ b/src/infrastructure/__tests__/__init__.php
@@ -0,0 +1,15 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'infrastructure/testing/testcase');
+
+phutil_require_module('phutil', 'symbols');
+phutil_require_module('phutil', 'utils');
+
+
+phutil_require_source('PhabricatorInfrastructureTestCase.php');