diff --git a/src/lint/linter/__tests__/ArcanistLinterTestCase.php b/src/lint/linter/__tests__/ArcanistLinterTestCase.php
--- a/src/lint/linter/__tests__/ArcanistLinterTestCase.php
+++ b/src/lint/linter/__tests__/ArcanistLinterTestCase.php
@@ -64,8 +64,6 @@
       $contents,
       array(null, null));
 
-    $basename = basename($file);
-
     if ($config) {
       $config = phutil_json_decode($config);
     } else {
@@ -75,11 +73,16 @@
       $config,
       array(
         'config' => 'optional map<string, wild>',
+        'filename' => 'optional string',
         'path' => 'optional string',
         'mode' => 'optional string',
         'stopped' => 'optional bool',
       ));
 
+    $filename = coalesce(
+      idx($config, 'filename'),
+      basename($file));
+
     $exception = null;
     $after_lint = null;
     $messages = null;
@@ -87,7 +90,7 @@
     $caught_exception = false;
 
     try {
-      $tmp = new TempFile($basename);
+      $tmp = new TempFile($filename);
       Filesystem::writeFile($tmp, $data);
       $full_path = (string)$tmp;
 
@@ -166,7 +169,7 @@
     }
 
     $this->assertEqual(false, $caught_exception, $exception_message);
-    $this->compareLint($basename, $expect, $result);
+    $this->compareLint($filename, $expect, $result);
     $this->compareTransform($xform, $after_lint);
   }