diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 0000000..9fb3f39
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,56 @@
+# This is a basic workflow to help you get started with Actions
+
+name: CI
+
+# Controls when the action will run. 
+on:
+  # Triggers the workflow on push or pull request events but only for the master branch
+  push:
+    branches:
+      - '*'
+  pull_request:
+    branches: [ master ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        emacs_version:
+          - '25.3'
+          - '26.3'
+          - '27.1'
+          - 'snapshot'
+        cask_version:
+          - 'snapshot'
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: '3.9'
+          architecture: 'x64'
+      - uses: purcell/setup-emacs@master
+        with:
+          version: ${{ matrix.emacs_version }}
+
+      - uses: conao3/setup-cask@master
+        with:
+          version: 'snapshot'
+
+      - name: Run tests
+        env:
+          COVERALLS_FLAG_NAME: Emacs ${{ matrix.emacs_version }}
+          COVERALLS_PARALLEL: 1
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          make install
+          make test
+  send-coverage-report:
+    runs-on: ubuntu-latest
+    if: always()
+    needs: test
+    steps:
+      - run: curl "https://coveralls.io/webhook?repo_name=$GITHUB_REPOSITORY&repo_token=${{ secrets.GITHUB_TOKEN }}" -d "payload[build_num]=$GITHUB_RUN_NUMBER&payload[status]=done"
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 3ac3b63..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,28 +0,0 @@
-language: emacs-lisp
-
-script:
-  - emacs --version
-  - make test
-
-env:
-  matrix:
-    - EVM_EMACS=emacs-26.1-travis
-    - EVM_EMACS=emacs-25.3-travis
-    # don't need 25.2 because it's the same 25.3
-    - EVM_EMACS=emacs-25.1-travis
-    - EVM_EMACS=emacs-24.5-travis
-    - EVM_EMACS=emacs-24.4-travis
-    # - EVM_EMACS=emacs-git-snapshot-travis
-# matrix:
-#   fast_finish: true
-#   # allow_failures:
-#   #   - env: EVM_EMACS=emacs-git-snapshot-travis
-
-sudo: no
-before_install:
-  - curl -fsSkL https://gist.github.com/rejeep/ebcd57c3af83b049833b/raw > travis.sh && source ./travis.sh
-  - evm install $EVM_EMACS --use --skip
-  - cask
-
-# notifications:
-#   email: false
diff --git a/window-purpose-configuration.el b/window-purpose-configuration.el
index fb18019..0794ffb 100644
--- a/window-purpose-configuration.el
+++ b/window-purpose-configuration.el
@@ -129,7 +129,7 @@ purpose of a buffer.  The user configuration and extended configuration
 are used anyway."
   :group 'purpose
   :type 'boolean
-  :package-version "1.2")
+  :package-version '(window-purpose . "1.2"))
 
 (defcustom purpose-user-mode-purposes nil
   "User configured alist mapping of modes to purposes.
@@ -143,7 +143,7 @@ If you set this variable in elisp-code, you should call the function
            (prog1 (set-default symbol value)
              (purpose-compile-user-configuration)))
   :initialize 'custom-initialize-default
-  :package-version "1.2")
+  :package-version '(window-purpose . "1.2"))
 
 (defcustom purpose-user-name-purposes nil
   "User configured alist mapping of names to purposes.
@@ -157,7 +157,7 @@ If you set this variable in elisp-code, you should call the function
            (prog1 (set-default symbol value)
              (purpose-compile-user-configuration)))
   :initialize 'custom-initialize-default
-  :package-version "1.2")
+  :package-version '(window-purpose . "1.2"))
 
 (defcustom purpose-user-regexp-purposes nil
   "User configured alist mapping of regexps to purposes.
@@ -171,7 +171,7 @@ If you set this variable in elisp-code, you should call the function
            (prog1 (set-default symbol value)
              (purpose-compile-user-configuration)))
   :initialize 'custom-initialize-default
-  :package-version "1.2")
+  :package-version '(window-purpose . "1.2"))
 
 (defvar purpose-extended-configuration nil
   "A plist containing `purpose-conf' objects.
diff --git a/window-purpose-core.el b/window-purpose-core.el
index b3be2f9..faef925 100644
--- a/window-purpose-core.el
+++ b/window-purpose-core.el
@@ -33,19 +33,19 @@
   "purpose-mode configuration"
   :group 'windows
   :prefix "purpose-"
-  :package-version "1.2")
+  :package-version '(window-purpose . "1.2"))
 
 (defcustom default-purpose 'general
   "The default purpose for buffers which didn't get another purpose."
   :group 'purpose
   :type 'symbol
-  :package-version "1.2")
+  :package-version '(window-purpose . "1.2"))
 
 (defcustom default-file-purpose 'edit
   "The default purpose for buffers visiting a file which didn't get a purpose."
   :group 'purpose
   :type 'symbol
-  :package-version "1.6.1")
+  :package-version '(window-purpose . "1.6.1"))
 
 ;;; utilities
 
diff --git a/window-purpose-fixes.el b/window-purpose-fixes.el
index 2137165..9c722e8 100644
--- a/window-purpose-fixes.el
+++ b/window-purpose-fixes.el
@@ -29,7 +29,33 @@
 (require 'window-purpose-switch)
 (require 'window-purpose-configuration)
 
-
+(defun purpose--fix-edebug ()
+  "Integrates Edebug with Purpose."
+
+  (with-eval-after-load 'edebug
+    (defun purpose--edebug-pop-to-buffer-advice (buffer &optional window)
+      "Reimplements `edebug-pop-to-buffer' using `pop-to-buffer'
+
+Since `edebug-pop-to-buffer' simply splits the last selected
+window before the minibuffer was popped up, the window it picks
+to display a edebug buffer does not respect `window-purpose' as
+all.  This advice reimplements it by replacing the window
+spliting logic with `pop-to-buffer'."
+      (setq window
+            (cond
+             ((and (edebug-window-live-p window)
+                   (eq (window-buffer window) buffer))
+              window)
+             ((eq (window-buffer) buffer)
+              (selected-window))
+             ((get-buffer-window buffer 0))
+             (t (get-buffer-window (pop-to-buffer buffer)))))
+      (set-window-buffer window buffer)
+      (select-window window)
+      (unless (memq (framep (selected-frame)) '(nil t pc))
+        (x-focus-frame (selected-frame)))
+      (set-window-hscroll window 0))
+    (advice-add 'edebug-pop-to-buffer :override 'purpose--edebug-pop-to-buffer-advice)))
 
 ;;; `compilation-next-error-function' sometimes hides the compilation buffer
 ;;; when Purpose is on. Solution: make the buffer's window dedicated while
@@ -58,6 +84,23 @@ Prevents `isearch-describe-*' commands from bypassing purpose."
     (setq isearch--display-help-action '(purpose--action-function . nil))))
 
 
+(defun purpose--fix-next-error ()
+  "Integrate `window-purpose' and `next-error'.
+
+Under `next-error-follow-minor-mode', `next-error-no-select' will
+override window-purpose's `display-buffer-overriding-action'.
+This will result in source buffers not displaying in the
+purpose-dedicated window for source code in complex window
+layouts.  This fix makes sure `next-error' works with
+window-purpose."
+  (defun purpose--next-error (oldfun &rest args)
+    "Make sure `next-error' respects `purspose--action-function'."
+    (interactive (lambda (spec) (advice-eval-interactive-spec spec)))
+    (let ((display-buffer-overriding-action '(purpose--action-function . nil)))
+      (apply oldfun args)))
+  (advice-add 'next-error :around 'purpose--next-error))
+
+
 ;;; Hydra's *LV* buffer should be ignored by Purpose
 (defun purpose--fix-hydra-lv ()
   "Add hydra's LV buffer to Purpose's ignore list."
@@ -254,28 +297,49 @@ Don't call this function before `popwin' is loaded."
     (add-to-list 'purpose-special-action-sequences
                  '(Zone display-buffer-same-window))))
 
+
+(defun purpose--fix-whitespace ()
+  "Integrate `window-purpose' with `whitespace'."
+  (with-eval-after-load 'whitespace
+    (defun purpose--whitespace-display-window-advice (buffer)
+      "Stops `whitespace-display-window' from splitting and shrinking windows."
+      (with-current-buffer buffer
+        (special-mode)
+        (goto-char (point-min)))
+      (switch-to-buffer buffer))
+    (advice-add 'whitespace-display-window :override
+                'purpose--whitespace-display-window-advice)))
+
+
 ;;; install fixes
 
 (defun purpose-fix-install (&rest exclude)
   "Install fixes for integrating Purpose with other features.
 EXCLUDE is a list of integrations to skip.  Known members of EXCLUDE
 are:
+- 'edebug : don't integrate with edebug
 - 'compilation-next-error-function : don't integrate with
   `compilation-next-error-function'.
 - 'isearch : don't integrate with isearch
+- 'next-error : don't integrate with `next-error'
 - 'lv : don't integrate with lv (hydra)
 - 'helm : don't integrate with helm
 - 'neotree : don't integrate with neotree
 - 'org : don't integrate with org
 - 'popwin : don't integrate with popwin
 - 'guide-key : don't integrate with guide-key
-- 'which-key : don't integrate with which-key"
+- 'which-key : don't integrate with which-key
+- 'whitespace : don't integrate with whitespace"
   (interactive)
+  (unless (member 'edebug exclude)
+    (purpose--fix-edebug))
   (unless (member 'compilation-next-error-function exclude)
     (advice-add 'compilation-next-error-function
                 :around #'purpose--fix-compilation-next-error))
   (unless (member 'isearch exclude)
     (purpose--fix-isearch))
+  (unless (member 'next-error exclude)
+    (purpose--fix-next-error))
   (unless (member 'lv exclude)
     (purpose--fix-hydra-lv))
   (unless (member 'helm exclude)
@@ -293,7 +357,9 @@ are:
   (unless (member 'magit-popup exclude)
     (purpose--fix-magit-popup))
   (unless (member 'zone exclude)
-    (purpose--fix-zone)))
+    (purpose--fix-zone))
+  (unless (member 'whitespace exclude)
+    (purpose--fix-whitespace)))
 
 (provide 'window-purpose-fixes)
 ;;; window-purpose-fixes.el ends here
diff --git a/window-purpose-layout.el b/window-purpose-layout.el
index bf58325..11403db 100644
--- a/window-purpose-layout.el
+++ b/window-purpose-layout.el
@@ -40,21 +40,21 @@
   "If nil, don't use layouts from `purpose--built-in-layouts-dir'."
   :group 'purpose
   :type 'boolean
-  :package-version "1.6")
+  :package-version '(window-purpose . "1.6"))
 
 (defcustom purpose-default-layout-file
   (concat user-emacs-directory ".purpose-layout")
   "Default file for saving/loading purpose layout."
   :group 'purpose
   :type 'file
-  :package-version "1.2")
+  :package-version '(window-purpose . "1.2"))
 
 (defcustom purpose-layout-dirs
   (list (locate-user-emacs-file "layouts/"))
   "List of directories containing layout files."
   :group 'purpose
   :type '(repeat file)
-  :package-version "1.5")
+  :package-version '(window-purpose . "1.5"))
 
 (defcustom purpose-get-extra-window-params-functions nil
   "If non-nil, this variable should be a list of functions.
@@ -62,7 +62,7 @@ This variable is used by `purpose-window-params'.  See
 `purpose-window-params' for more details."
   :group 'purpose
   :type 'hook
-  :package-version "1.4")
+  :package-version '(window-purpose . "1.4"))
 
 (defcustom purpose-set-window-properties-functions nil
   "Hook to run after calling `purpose-set-window-properties'.
@@ -75,7 +75,7 @@ WINDOW is nil, your function should act on the selected window
 instead."
   :group 'purpose
   :type 'hook
-  :package-version "1.2")
+  :package-version '(window-purpose . "1.2"))
 
 (defvar purpose-recent-window-layouts (make-ring 50)
   "Most recently used window layouts.
diff --git a/window-purpose-switch.el b/window-purpose-switch.el
index 16766bf..703fa9f 100644
--- a/window-purpose-switch.el
+++ b/window-purpose-switch.el
@@ -55,20 +55,20 @@ Any other value is treated the same as nil."
                  (const error)
                  (const nil)
                  function)
-  :package-version "1.4")
+  :package-version '(window-purpose . "1.4"))
 
 (defcustom purpose-display-buffer-functions nil
   "Hook to run after displaying a buffer with `purpose--action-function'.
 This hook is called with one argument - the window used for display."
   :group 'purpose
   :type 'hook
-  :package-version "1.4")
+  :package-version '(window-purpose . "1.4"))
 
 (defcustom purpose-select-buffer-hook nil
   "Hook to run after selecting a buffer with `purpose-select-buffer'."
   :group 'purpose
   :type 'hook
-  :package-version "1.2")
+  :package-version '(window-purpose . "1.2"))
 
 (defvar purpose--active-p nil
   "When nil, Purpose's advices and `purpose--action-function' are not
@@ -139,7 +139,7 @@ case, `purpose-display-at-top-height' is ignored."
   :group 'purpose
   :type '(choice number
                  (const nil))
-  :package-version "1.4")
+  :package-version '(window-purpose . "1.4"))
 
 (defcustom purpose-display-at-bottom-height 8
   "Height for new windows created by `purpose-display-at-bottom'.
@@ -153,7 +153,7 @@ this case, `purpose-display-at-bottom-height' is ignored."
   :group 'purpose
   :type '(choice number
                  (const nil))
-  :package-version "1.4")
+  :package-version '(window-purpose . "1.4"))
 
 (defcustom purpose-display-at-left-width 32
   "Width for new windows created by `purpose-display-at-left'.
@@ -166,7 +166,7 @@ case, `purpose-display-at-left-width' is ignored."
   :group 'purpose
   :type '(choice number
                  (const nil))
-  :package-version "1.4")
+  :package-version '(window-purpose . "1.4"))
 
 (defcustom purpose-display-at-right-width 32
   "Width for new windows created by `purpose-display-at-right'.
@@ -180,7 +180,7 @@ this case, `purpose-display-at-right-width' is ignored."
   :group 'purpose
   :type '(choice number
                  (const nil))
-  :package-version "1.4")
+  :package-version '(window-purpose . "1.4"))
 
 
 
diff --git a/window-purpose-utils.el b/window-purpose-utils.el
index 3a19c86..ebd6532 100644
--- a/window-purpose-utils.el
+++ b/window-purpose-utils.el
@@ -32,7 +32,7 @@
 Toggling this on will cause Purpose to produce some debug messages."
   :group 'purpose
   :type 'boolean
-  :package-version "1.2")
+  :package-version '(window-purpose . "1.2"))
 
 (defun purpose-message (format-string &rest args)
   "Produce a message if `purpose-message-on-p' is non-nil.
diff --git a/window-purpose-x.el b/window-purpose-x.el
index 6045997..1661566 100644
--- a/window-purpose-x.el
+++ b/window-purpose-x.el
@@ -215,22 +215,40 @@ imenu."
                     (magit-wazzup-mode . magit-wazzup)))
   "Configuration that gives each magit major mode its own purpose.")
 
+(defvar purpose-x-old-magit-display-buffer-function nil
+  "Stores `magit-display-buffer-function'.
+
+The value of `magit-display-buffer-function' at the time
+`purpose-x-magit-single-on' or `purpose-x-magit-multi-on' is
+invoked.")
+
+(defun purpose-x-magit-display-buffer-function (buffer)
+  "Integrate `magit' with `window-purpose'."
+  (let ((display-buffer-overriding-action '(purpose--action-function . nil)))
+    (funcall purpose-x-old-magit-display-buffer-function buffer)))
+
 ;;;###autoload
 (defun purpose-x-magit-single-on ()
   "Turn on magit-single purpose configuration."
   (interactive)
+  (setq purpose-x-old-magit-display-buffer-function magit-display-buffer-function
+        magit-display-buffer-function 'purpose-x-magit-display-buffer-function)
   (purpose-set-extension-configuration :magit purpose-x-magit-single-conf))
 
 ;;;###autoload
 (defun purpose-x-magit-multi-on ()
   "Turn on magit-multi purpose configuration."
   (interactive)
+  (setq purpose-x-old-magit-display-buffer-function magit-display-buffer-function
+        magit-display-buffer-function 'purpose-x-magit-display-buffer-function)
   (purpose-set-extension-configuration :magit purpose-x-magit-multi-conf))
 
 (defun purpose-x-magit-off ()
   "Turn off magit purpose configuration (single or multi)."
   (interactive)
-  (purpose-del-extension-configuration :magit))
+  (purpose-del-extension-configuration :magit)
+  (setq magit-display-buffer-function purpose-x-old-magit-display-buffer-function
+        purpose-x-old-magit-display-buffer-function nil))
 
 ;;; --- purpose-x-magit ends here ---
 
@@ -302,7 +320,7 @@ compatible with `display-buffer'."
                  (const left)
                  (const right)
                  function)
-  :package-version "1.4")
+  :package-version '(window-purpose . "1.4"))
 
 (defcustom purpose-x-popwin-width 0.4
   "Width of popup window when displayed at left or right.
@@ -311,7 +329,7 @@ Can have the same values as `purpose-display-at-left-width' and
   :group 'purpose
   :type '(choice number
                  (const nil))
-  :package-version "1.4")
+  :package-version '(window-purpose . "1.4"))
 
 (defcustom purpose-x-popwin-height 0.35
   "Height of popup window when displayed at top or bottom.
@@ -320,7 +338,7 @@ Can have the same values as `purpose-display-at-top-height' and
   :group 'purpose
   :type '(choice number
                  (const nil))
-  :package-version "1.4")
+  :package-version '(window-purpose . "1.4"))
 
 (defcustom purpose-x-popwin-major-modes '(help-mode
                                           compilation-mode
@@ -334,7 +352,7 @@ When changing the value of this variable in elisp code, you should call
            (prog1 (set-default symbol value)
              (purpose-x-popwin-update-conf)))
   :initialize 'custom-initialize-default
-  :package-version "1.4")
+  :package-version '(window-purpose . "1.4"))
 
 (defcustom purpose-x-popwin-buffer-names '("*Shell Command Output*")
   "List of buffer names that should be opened as popup windows.
@@ -348,7 +366,7 @@ When changing the value of this variable in elisp code, you should call
            (prog1 (set-default symbol value)
              (purpose-x-popwin-update-conf)))
   :initialize 'custom-initialize-default
-  :package-version "1.4")
+  :package-version '(window-purpose . "1.4"))
 
 (defcustom purpose-x-popwin-buffer-name-regexps nil
   "List of regexp that should be opened as popup windows.
@@ -362,7 +380,7 @@ When changing the value of this variable in elisp code, you should call
            (prog1 (set-default symbol value)
              (purpose-x-popwin-update-conf)))
   :initialize 'custom-initialize-default
-  :package-version "1.4")
+  :package-version '(window-purpose . "1.4"))
 
 (defun purpose-x-popupify-purpose (purpose &optional display-fn)
   "Set up a popup-like behavior for buffers with purpose PURPOSE.