diff --git a/test/doom-modeline-core-test.el b/test/doom-modeline-core-test.el
index 3e8bcab..a13c1e8 100644
--- a/test/doom-modeline-core-test.el
+++ b/test/doom-modeline-core-test.el
@@ -59,13 +59,22 @@
                (doom-modeline-icon 'octicon "octoface" "☻" ":)" 'error))
               ":)"))))
 
-(ert-deftest doom-modeline-project-root/ffip ()
+(ert-deftest doom-modeline-project-root/auto ()
   (let ((default-directory "/home/user/project/")
+        (doom-modeline-project-detection 'auto)
+        (doom-modeline--project-detected-p t)
+        (doom-modeline--project-root nil))
+    (cl-flet ((project-current (&optional _maybe-prompt _dir)
+                               `(vc . ,default-directory)))
+      (should (string= (doom-modeline-project-root) default-directory)))))
+
+(ert-deftest doom-modeline-project-root/ffip ()
+  (let ((default-directory "/home/user/project-ffip/")
         (doom-modeline-project-detection 'ffip)
         (doom-modeline--project-detected-p t)
         (doom-modeline--project-root nil))
     (cl-flet ((ffip-get-project-root-directory () "/home/user/project-ffip/"))
-      (should (string= (ffip-get-project-root-directory) "/home/user/project-ffip/")))))
+      (should (string= (doom-modeline-project-root) "/home/user/project-ffip/")))))
 
 (ert-deftest doom-modeline-project-root/projectile ()
   (let ((default-directory "/home/user/projectile/")