diff --git a/Casks/emacs-app-good.rb b/Casks/emacs-app-good.rb
index 253dd62a..6c20b02f 100644
--- a/Casks/emacs-app-good.rb
+++ b/Casks/emacs-app-good.rb
@@ -20,9 +20,10 @@ cask 'emacs-app-good' do
 
   conflicts_with(
     cask: %w[
+      emacs-app
       emacs-app-nightly
       emacs-app-nightly-28
-      emacs-app
+      emacs-app-pretest
       emacs
       emacs-nightly
       emacs-pretest
diff --git a/Casks/emacs-app-nightly-28.rb b/Casks/emacs-app-nightly-28.rb
index 12ece623..f78ff4c0 100644
--- a/Casks/emacs-app-nightly-28.rb
+++ b/Casks/emacs-app-nightly-28.rb
@@ -25,8 +25,9 @@ cask 'emacs-app-nightly-28' do
   conflicts_with(
     cask: %w[
       emacs-app
-      emacs-app-nightly
       emacs-app-good
+      emacs-app-nightly
+      emacs-app-pretest
       emacs
       emacs-nightly
       emacs-pretest
diff --git a/Casks/emacs-app-nightly.rb b/Casks/emacs-app-nightly.rb
index c6d4927a..67721721 100644
--- a/Casks/emacs-app-nightly.rb
+++ b/Casks/emacs-app-nightly.rb
@@ -25,8 +25,9 @@ cask 'emacs-app-nightly' do
   conflicts_with(
     cask: %w[
       emacs-app
-      emacs-app-nightly-28
       emacs-app-good
+      emacs-app-nightly-28
+      emacs-app-pretest
       emacs
       emacs-nightly
       emacs-pretest
diff --git a/Casks/emacs-app-pretest.rb b/Casks/emacs-app-pretest.rb
new file mode 100644
index 00000000..8a4c55a6
--- /dev/null
+++ b/Casks/emacs-app-pretest.rb
@@ -0,0 +1,65 @@
+# frozen_string_literal: true
+
+cask 'emacs-app-pretest' do
+  version '28.0.90-pretest'
+
+  sha256 'c49633fdd23365f1a5df551365d84cede37de983dcaa788c4b6ce10bf659fc87'
+  url 'https://github.com/jimeh/emacs-builds/releases/download/Emacs-28.0.90-pretest/Emacs.2021-12-01.f38dfa5.emacs-28-0-90-pretest.macOS-10-15.x86_64.dmg'
+
+  name 'Emacs'
+  desc 'GNU Emacs text editor (latest pretest)'
+  homepage 'https://github.com/jimeh/emacs-builds'
+
+  livecheck do
+    url 'https://github.com/jimeh/emacs-builds.git'
+    strategy :git do |tags|
+      tags.map do |tag|
+        m = /^Emacs-(.+-pretest)$/.match(tag)
+        next unless m
+
+        m[1]
+      end.compact
+    end
+  end
+
+  conflicts_with(
+    cask: %w[
+      emacs-app
+      emacs-app-good
+      emacs-app-nightly
+      emacs-app-nightly-28
+      emacs
+      emacs-nightly
+      emacs-pretest
+      emacs-mac
+      emacs-mac-spacemacs-icon
+    ],
+    formula: %w[
+      emacs
+      emacs-mac
+    ]
+  )
+
+  depends_on macos: '>= :catalina'
+
+  app 'Emacs.app'
+  binary "#{appdir}/Emacs.app/Contents/MacOS/bin/ebrowse"
+  binary "#{appdir}/Emacs.app/Contents/MacOS/bin/emacs"
+  binary "#{appdir}/Emacs.app/Contents/MacOS/bin/emacsclient"
+  binary "#{appdir}/Emacs.app/Contents/MacOS/bin/etags"
+  binary "#{appdir}/Emacs.app/Contents/Resources/include/emacs-module.h",
+         target: "#{HOMEBREW_PREFIX}/include/emacs-module.h"
+  binary "#{appdir}/Emacs.app/Contents/Resources/site-lisp/subdirs.el",
+         target: "#{HOMEBREW_PREFIX}/share/emacs/site-lisp/subdirs.el"
+
+  manpage "#{appdir}/Emacs.app/Contents/Resources/man/man1/ebrowse.1.gz"
+  manpage "#{appdir}/Emacs.app/Contents/Resources/man/man1/emacs.1.gz"
+  manpage "#{appdir}/Emacs.app/Contents/Resources/man/man1/emacsclient.1.gz"
+  manpage "#{appdir}/Emacs.app/Contents/Resources/man/man1/etags.1.gz"
+
+  zap trash: [
+    '~/Library/Caches/org.gnu.Emacs',
+    '~/Library/Preferences/org.gnu.Emacs.plist',
+    '~/Library/Saved Application State/org.gnu.Emacs.savedState'
+  ]
+end
diff --git a/Casks/emacs-app.rb b/Casks/emacs-app.rb
index f351f10e..f645a530 100644
--- a/Casks/emacs-app.rb
+++ b/Casks/emacs-app.rb
@@ -24,9 +24,10 @@ cask 'emacs-app' do
 
   conflicts_with(
     cask: %w[
+      emacs-app-good
       emacs-app-nightly
       emacs-app-nightly-28
-      emacs-app-good
+      emacs-app-pretest
       emacs
       emacs-nightly
       emacs-pretest
diff --git a/templates/emacs-app-good.rb.tpl b/templates/emacs-app-good.rb.tpl
index 8fc87d63..3167c0fe 100644
--- a/templates/emacs-app-good.rb.tpl
+++ b/templates/emacs-app-good.rb.tpl
@@ -20,9 +20,10 @@ cask 'emacs-app-good' do
 
   conflicts_with(
     cask: %w[
+      emacs-app
       emacs-app-nightly
       emacs-app-nightly-28
-      emacs-app
+      emacs-app-pretest
       emacs
       emacs-nightly
       emacs-pretest
diff --git a/templates/emacs-app-nightly-28.rb.tpl b/templates/emacs-app-nightly-28.rb.tpl
index 2dc26f9f..25d90fd1 100644
--- a/templates/emacs-app-nightly-28.rb.tpl
+++ b/templates/emacs-app-nightly-28.rb.tpl
@@ -25,8 +25,9 @@ cask 'emacs-app-nightly-28' do
   conflicts_with(
     cask: %w[
       emacs-app
-      emacs-app-nightly
       emacs-app-good
+      emacs-app-nightly
+      emacs-app-pretest
       emacs
       emacs-nightly
       emacs-pretest
diff --git a/templates/emacs-app-nightly.rb.tpl b/templates/emacs-app-nightly.rb.tpl
index c1d64298..5f4fb2f3 100644
--- a/templates/emacs-app-nightly.rb.tpl
+++ b/templates/emacs-app-nightly.rb.tpl
@@ -25,8 +25,9 @@ cask 'emacs-app-nightly' do
   conflicts_with(
     cask: %w[
       emacs-app
-      emacs-app-nightly-28
       emacs-app-good
+      emacs-app-nightly-28
+      emacs-app-pretest
       emacs
       emacs-nightly
       emacs-pretest
diff --git a/templates/emacs-app-pretest.rb.tpl b/templates/emacs-app-pretest.rb.tpl
new file mode 100644
index 00000000..d69a950b
--- /dev/null
+++ b/templates/emacs-app-pretest.rb.tpl
@@ -0,0 +1,65 @@
+# frozen_string_literal: true
+
+cask 'emacs-app-pretest' do
+  version '{{ .Version }}'
+
+  sha256 '{{ .SHA256 "macOS-10-15" "x86_64" }}'
+  url '{{ .DownloadURL "macOS-10-15" "x86_64" }}'
+
+  name 'Emacs'
+  desc 'GNU Emacs text editor (latest pretest)'
+  homepage 'https://github.com/jimeh/emacs-builds'
+
+  livecheck do
+    url 'https://github.com/jimeh/emacs-builds.git'
+    strategy :git do |tags|
+      tags.map do |tag|
+        m = /^Emacs-(.+-pretest)$/.match(tag)
+        next unless m
+
+        m[1]
+      end.compact
+    end
+  end
+
+  conflicts_with(
+    cask: %w[
+      emacs-app
+      emacs-app-good
+      emacs-app-nightly
+      emacs-app-nightly-28
+      emacs
+      emacs-nightly
+      emacs-pretest
+      emacs-mac
+      emacs-mac-spacemacs-icon
+    ],
+    formula: %w[
+      emacs
+      emacs-mac
+    ]
+  )
+
+  depends_on macos: '>= :catalina'
+
+  app 'Emacs.app'
+  binary "#{appdir}/Emacs.app/Contents/MacOS/bin/ebrowse"
+  binary "#{appdir}/Emacs.app/Contents/MacOS/bin/emacs"
+  binary "#{appdir}/Emacs.app/Contents/MacOS/bin/emacsclient"
+  binary "#{appdir}/Emacs.app/Contents/MacOS/bin/etags"
+  binary "#{appdir}/Emacs.app/Contents/Resources/include/emacs-module.h",
+         target: "#{HOMEBREW_PREFIX}/include/emacs-module.h"
+  binary "#{appdir}/Emacs.app/Contents/Resources/site-lisp/subdirs.el",
+         target: "#{HOMEBREW_PREFIX}/share/emacs/site-lisp/subdirs.el"
+
+  manpage "#{appdir}/Emacs.app/Contents/Resources/man/man1/ebrowse.1.gz"
+  manpage "#{appdir}/Emacs.app/Contents/Resources/man/man1/emacs.1.gz"
+  manpage "#{appdir}/Emacs.app/Contents/Resources/man/man1/emacsclient.1.gz"
+  manpage "#{appdir}/Emacs.app/Contents/Resources/man/man1/etags.1.gz"
+
+  zap trash: [
+    '~/Library/Caches/org.gnu.Emacs',
+    '~/Library/Preferences/org.gnu.Emacs.plist',
+    '~/Library/Saved Application State/org.gnu.Emacs.savedState'
+  ]
+end
diff --git a/templates/emacs-app.rb.tpl b/templates/emacs-app.rb.tpl
index 5df036cf..8456333d 100644
--- a/templates/emacs-app.rb.tpl
+++ b/templates/emacs-app.rb.tpl
@@ -24,9 +24,10 @@ cask 'emacs-app' do
 
   conflicts_with(
     cask: %w[
+      emacs-app-good
       emacs-app-nightly
       emacs-app-nightly-28
-      emacs-app-good
+      emacs-app-pretest
       emacs
       emacs-nightly
       emacs-pretest