diff --git a/test/lisp/progmodes/xref-tests.el b/test/lisp/progmodes/xref-tests.el
index 060c9cb5d1c..038f9d0e304 100644
--- a/test/lisp/progmodes/xref-tests.el
+++ b/test/lisp/progmodes/xref-tests.el
@@ -24,11 +24,13 @@
 ;;; Code:
 
 (require 'ert)
-(require 'ert-x)
 (require 'xref)
 (require 'cl-lib)
 
-(defvar xref-tests-data-dir (ert-resource-directory))
+(defvar xref-tests-data-dir
+  (expand-file-name "xref-resources/"
+                    (file-name-directory
+                     (or load-file-name buffer-file-name))))
 
 (ert-deftest xref-matches-in-directory-finds-none-for-some-regexp ()
   (should (null (xref-matches-in-directory "zzz" "*" xref-tests-data-dir nil))))