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diff --git a/test/lisp/eshell/em-dirs-tests.el b/test/lisp/eshell/em-dirs-tests.el
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+;;; em-dirs-tests.el --- em-dirs test suite  -*- lexical-binding:t -*-
+
+;; Copyright (C) 2022 Free Software Foundation, Inc.
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; Tests for Eshell's dirs module.
+
+;;; Code:
+
+(require 'ert)
+(require 'esh-mode)
+(require 'eshell)
+(require 'em-dirs)
+
+(require 'eshell-tests-helpers
+         (expand-file-name "eshell-tests-helpers"
+                           (file-name-directory (or load-file-name
+                                                    default-directory))))
+;;; Tests:
+
+(ert-deftest em-dirs-test/pwd-var ()
+  "Test using the $PWD variable."
+  (let ((default-directory "/some/path"))
+    (eshell-command-result-equal "echo $PWD"
+                                 (expand-file-name default-directory))))
+
+(ert-deftest em-dirs-test/pwd-var-indices ()
+  "Test using the $PWD variable with indices."
+  (let ((default-directory "/some/path/here"))
+    (eshell-command-result-equal "echo $PWD[/ 1]"
+                                 "some")
+    (eshell-command-result-equal "echo $PWD[/ 1 3]"
+                                 '("some" "here"))))
+
+(ert-deftest em-dirs-test/short-pwd-var ()
+  "Test using the $+ (current directory) variable."
+  (let ((default-directory "/some/path"))
+    (eshell-command-result-equal "echo $+"
+                                 (expand-file-name default-directory))))
+
+(ert-deftest em-dirs-test/oldpwd-var ()
+  "Test using the $OLDPWD variable."
+  (let (eshell-last-dir-ring-file-name)
+    (with-temp-eshell
+     (eshell-match-command-output "echo $OLDPWD"
+                                  "\\`\\'")
+     (ring-insert eshell-last-dir-ring "/some/path")
+     (eshell-match-command-output "echo $OLDPWD"
+                                  "/some/path\n"))))
+
+(ert-deftest em-dirs-test/oldpwd-var-indices ()
+  "Test using the $OLDPWD variable with indices."
+  (let (eshell-last-dir-ring-file-name)
+    (with-temp-eshell
+     (ring-insert eshell-last-dir-ring "/some/path/here")
+     (eshell-match-command-output "echo $OLDPWD[/ 1]"
+                                  "some\n")
+     (eshell-match-command-output "echo $OLDPWD[/ 1 3]"
+                                  "(\"some\" \"here\")\n"))))
+
+(ert-deftest em-dirs-test/directory-ring-var ()
+  "Test using the $- (directory ring) variable."
+  (let (eshell-last-dir-ring-file-name)
+    (with-temp-eshell
+     (eshell-match-command-output "echo $-"
+                                  "\\`\\'")
+     (ring-insert eshell-last-dir-ring "/some/path")
+     (ring-insert eshell-last-dir-ring "/other/path")
+     (eshell-match-command-output "echo $-"
+                                  "/other/path\n")
+     (eshell-match-command-output "echo $-[0]"
+                                  "/other/path\n")
+     (eshell-match-command-output "echo $-[1]"
+                                  "/some/path\n"))))
+
+(ert-deftest em-dirs-test/directory-ring-var-indices ()
+  "Test using the $- (directory ring) variable with multiple indices."
+  (let (eshell-last-dir-ring-file-name)
+    (with-temp-eshell
+     (ring-insert eshell-last-dir-ring "/some/path/here")
+     (eshell-match-command-output "echo $-[0][/ 1]"
+                                  "some\n")
+     (eshell-match-command-output "echo $-[1][/ 1 3]"
+                                  "(\"some\" \"here\")\n"))))
+
+;; em-dirs-tests.el ends here