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diff --git a/test/lisp/erc/erc-track-tests.el b/test/lisp/erc/erc-track-tests.el
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+;;; erc-track-tests.el --- Tests for erc-track.
+
+;; Copyright (C) 2016 Free Software Foundation, Inc.
+
+;; Author: Mario Lang <mlang@delysid.org>
+;; Author: Vivek Dasmohapatra <vivek@etla.org>
+
+;; 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 <http://www.gnu.org/licenses/>.
+
+;;; Code:
+
+(require 'ert)
+(require 'erc-track)
+(require 'font-core)
+
+(ert-deftest erc-track--shorten-aggressive-nil ()
+  "Test non-aggressive erc track buffer name shortening."
+  (let (erc-track-shorten-aggressively)
+    (should
+     (equal (erc-unique-channel-names '("#emacs" "#vi" "#electronica" "#folk")
+                                      '("#emacs" "#vi"))
+            '("#em" "#vi")))
+    (should
+     (equal (erc-unique-channel-names '("#linux-de" "#linux-fr")
+                                      '("#linux-de" "#linux-fr"))
+            '("#linux-de" "#linux-fr")))
+    (should
+     (equal (erc-unique-channel-names
+             '("#dunnet" "#lisp" "#sawfish" "#fsf" "#guile" "#testgnome"
+               "#gnu" "#fsbot" "#hurd" "#hurd-bunny" "#emacs")
+             '("#hurd-bunny" "#hurd" "#sawfish" "#lisp"))
+            '("#hurd-" "#hurd" "#s" "#l")))
+    (should
+     (equal (erc-unique-substrings '("#emacs" "#vi" "#electronica" "#folk"))
+            '("#em" "#vi" "#el" "#f")))
+    (should
+     (equal (erc-unique-channel-names
+             '("#emacs" "#burse" "+linux.de" "#starwars"
+               "#bitlbee" "+burse" "#ratpoison")
+             '("+linux.de" "#starwars" "#burse"))
+            '("+l" "#s" "#bu")))
+    (should
+     (equal (erc-unique-channel-names '("fsbot" "#emacs" "deego") '("fsbot"))
+            '("fs")))
+    (should
+     (equal (erc-unique-channel-names '("fsbot" "#emacs" "deego")
+                                      '("fsbot")
+                                      (lambda (s) (> (length s) 4)) 1)
+            '("f")))
+    (should
+     (equal (erc-unique-channel-names '("fsbot" "#emacs" "deego")
+                                      '("fsbot")
+                                      (lambda (s) (> (length s) 4)) 2)
+            '("fs")))
+    (should
+     (equal (erc-unique-channel-names '("deego" "#hurd" "#hurd-bunny" "#emacs")
+                                      '("#hurd" "#hurd-bunny"))
+            '("#hurd" "#hurd-")))
+    (should
+     (and
+      (equal (erc-unique-substring-1 "abc" '("ab" "abcd")) "abcd")
+      (not   (erc-unique-substring-1 "a" '("xyz" "xab")))
+      (equal (erc-unique-substrings '("abc" "xyz" "xab")) '("abc" "xyz" "xab"))
+      (equal (erc-unique-substrings '("abc" "abcdefg")) '("abc" "abcd")))) ))
+
+(ert-deftest erc-track--shorten-aggressive-t ()
+  "Test aggressive erc track buffer name shortening."
+  (let ((erc-track-shorten-aggressively t))
+    (should
+     (equal (erc-unique-channel-names '("#emacs" "#vi" "#electronica" "#folk")
+                                      '("#emacs" "#vi"))
+            '("#em" "#v")))
+    (should
+     (equal (erc-unique-channel-names '("#linux-de" "#linux-fr")
+                                      '("#linux-de" "#linux-fr"))
+            '("#linux-d" "#linux-f")))
+    (should
+     (equal (erc-unique-substrings '("#emacs" "#vi" "#electronica" "#folk"))
+            '("#em" "#v" "#el" "#f")))
+    (should
+     (and
+      (equal (erc-unique-substring-1 "abc" '("ab" "abcd")) "abcd")
+      (not   (erc-unique-substring-1 "a" '("xyz" "xab")))
+      (equal (erc-unique-substrings '("abc" "xyz" "xab")) '("ab" "xy" "xa"))
+      (equal (erc-unique-substrings '("abc" "abcdefg")) '("abc" "abcd")))) ))
+
+(ert-deftest erc-track--shorten-aggressive-max ()
+  "Test maximally aggressive erc track buffer name shortening."
+  (let ((erc-track-shorten-aggressively 'max))
+    (should
+     (equal (erc-unique-channel-names '("#emacs" "#vi" "#electronica" "#folk")
+                                      '("#emacs" "#vi"))
+            '("#e" "#v"))) ))
+
+(ert-deftest erc-track--erc-faces-in ()
+  "`erc-faces-in' should pick up both 'face and 'font-lock-face properties."
+  (let ((str0 "is bold")
+        (str1 "is bold"))
+    ;; Turn on Font Lock mode: this initialize `char-property-alias-alist'
+    ;; to '((face font-lock-face)).  Note that `font-lock-mode' don't
+    ;; turn on the mode if the test is run on batch mode or if the
+    ;; buffer name starts with ?\s (Bug#23954).
+    (unless font-lock-mode (font-lock-default-function 1))
+    (put-text-property 3 (length str0) 'font-lock-face
+                       '(bold erc-current-nick-face) str0)
+    (put-text-property 3 (length str1) 'face
+                       '(bold erc-current-nick-face) str1)
+    (should (erc-faces-in str0))
+    (should (erc-faces-in str1)) ))