diff --git a/Library/Homebrew/test/support/fixtures/cask/Casks/appcast-checkpoint-sha256-for-empty-string.rb b/Library/Homebrew/test/support/fixtures/cask/Casks/appcast-checkpoint-sha256-for-empty-string.rb
deleted file mode 100644
index 4e74d728dc..0000000000
--- a/Library/Homebrew/test/support/fixtures/cask/Casks/appcast-checkpoint-sha256-for-empty-string.rb
+++ /dev/null
@@ -1,4 +0,0 @@
-cask 'appcast-checkpoint-sha256-for-empty-string' do
-  appcast 'http://localhost/appcast.xml',
-          checkpoint: 'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855'
-end
diff --git a/Library/Homebrew/test/support/fixtures/cask/Casks/appcast-invalid-checkpoint.rb b/Library/Homebrew/test/support/fixtures/cask/Casks/appcast-invalid-checkpoint.rb
deleted file mode 100644
index 8b69341489..0000000000
--- a/Library/Homebrew/test/support/fixtures/cask/Casks/appcast-invalid-checkpoint.rb
+++ /dev/null
@@ -1,4 +0,0 @@
-cask 'appcast-invalid-checkpoint' do
-  appcast 'http://localhost/appcast.xml',
-          checkpoint: 'not a valid shasum'
-end
diff --git a/Library/Homebrew/test/support/fixtures/cask/Casks/appcast-missing-checkpoint.rb b/Library/Homebrew/test/support/fixtures/cask/Casks/appcast-missing-checkpoint.rb
deleted file mode 100644
index fefdbcb3a6..0000000000
--- a/Library/Homebrew/test/support/fixtures/cask/Casks/appcast-missing-checkpoint.rb
+++ /dev/null
@@ -1,3 +0,0 @@
-cask 'appcast-missing-checkpoint' do
-  appcast 'http://localhost/appcast.xml'
-end
diff --git a/Library/Homebrew/test/support/fixtures/cask/Casks/github-with-appcast.rb b/Library/Homebrew/test/support/fixtures/cask/Casks/github-with-appcast.rb
index 3024ced934..5017b4f501 100644
--- a/Library/Homebrew/test/support/fixtures/cask/Casks/github-with-appcast.rb
+++ b/Library/Homebrew/test/support/fixtures/cask/Casks/github-with-appcast.rb
@@ -3,8 +3,7 @@ cask 'github-with-appcast' do
   sha256 'a69e7357bea014f4c14ac9699274f559086844ffa46563c4619bf1addfd72ad9'
 
   url "https://github.com/user/project/releases/download/#{version}/github.pkg"
-  appcast 'https://github.com/user/project/releases.atom',
-          checkpoint: '56d1707d3065bf0c75d75d7738571285273b7bf366d8f0f5a53eb8b457ad2453'
+  appcast 'https://github.com/user/project/releases.atom'
   name 'github'
   homepage 'https://github.com/user/project'
 
diff --git a/Library/Homebrew/test/support/fixtures/cask/Casks/invalid/invalid-appcast-multiple.rb b/Library/Homebrew/test/support/fixtures/cask/Casks/invalid/invalid-appcast-multiple.rb
index 37634f6194..19e8d23709 100644
--- a/Library/Homebrew/test/support/fixtures/cask/Casks/invalid/invalid-appcast-multiple.rb
+++ b/Library/Homebrew/test/support/fixtures/cask/Casks/invalid/invalid-appcast-multiple.rb
@@ -3,10 +3,8 @@ cask 'invalid-appcast-multiple' do
   sha256 '67cdb8a02803ef37fdbf7e0be205863172e41a561ca446cd84f0d7ab35a99d94'
 
   url "file://#{TEST_FIXTURE_DIR}/cask/caffeine.zip"
-  appcast 'http://example.com/appcast1.xml',
-          checkpoint: '67cdb8a02803ef37fdbf7e0be205863172e41a561ca446cd84f0d7ab35a99d94'
-  appcast 'http://example.com/appcast2.xml',
-          checkpoint: '67cdb8a02803ef37fdbf7e0be205863172e41a561ca446cd84f0d7ab35a99d94'
+  appcast 'http://example.com/appcast1.xml'
+  appcast 'http://example.com/appcast2.xml'
   homepage 'http://example.com/invalid-appcast-multiple'
 
   app 'Caffeine.app'
diff --git a/Library/Homebrew/test/support/fixtures/cask/Casks/invalid/invalid-appcast-url.rb b/Library/Homebrew/test/support/fixtures/cask/Casks/invalid/invalid-appcast-url.rb
index 7b51ffb535..a7e7f94a99 100644
--- a/Library/Homebrew/test/support/fixtures/cask/Casks/invalid/invalid-appcast-url.rb
+++ b/Library/Homebrew/test/support/fixtures/cask/Casks/invalid/invalid-appcast-url.rb
@@ -3,8 +3,7 @@ cask 'invalid-appcast-url' do
   sha256 '67cdb8a02803ef37fdbf7e0be205863172e41a561ca446cd84f0d7ab35a99d94'
 
   url "file://#{TEST_FIXTURE_DIR}/cask/caffeine.zip"
-  appcast 1,
-          checkpoint: '67cdb8a02803ef37fdbf7e0be205863172e41a561ca446cd84f0d7ab35a99d94'
+  appcast 1
   homepage 'http://example.com/invalid-appcast-url'
 
   app 'Caffeine.app'
diff --git a/Library/Homebrew/test/support/fixtures/cask/Casks/latest-with-appcast.rb b/Library/Homebrew/test/support/fixtures/cask/Casks/latest-with-appcast.rb
index 12b0b3e619..107eaf7590 100644
--- a/Library/Homebrew/test/support/fixtures/cask/Casks/latest-with-appcast.rb
+++ b/Library/Homebrew/test/support/fixtures/cask/Casks/latest-with-appcast.rb
@@ -3,8 +3,7 @@ cask 'latest-with-appcast' do
   sha256 :no_check
 
   url "file://#{TEST_FIXTURE_DIR}/cask/caffeine.zip"
-  appcast 'http://example.com/appcast.xml',
-          checkpoint: '67cdb8a02803ef37fdbf7e0be205863172e41a561ca446cd84f0d7ab35a99d94'
+  appcast 'http://example.com/appcast.xml'
   homepage 'http://example.com/with-appcast'
 
   app 'Caffeine.app'
diff --git a/Library/Homebrew/test/support/fixtures/cask/Casks/sourceforge-with-appcast.rb b/Library/Homebrew/test/support/fixtures/cask/Casks/sourceforge-with-appcast.rb
index fd4a388bcb..2e3b221614 100644
--- a/Library/Homebrew/test/support/fixtures/cask/Casks/sourceforge-with-appcast.rb
+++ b/Library/Homebrew/test/support/fixtures/cask/Casks/sourceforge-with-appcast.rb
@@ -2,7 +2,6 @@ cask 'sourceforge-with-appcast' do
   version '1.2.3'
 
   url 'https://downloads.sourceforge.net/something/Something-1.2.3.dmg'
-  appcast 'https://sourceforge.net/projects/something/rss',
-          checkpoint: '407fb59baa4b9eb7651d9243b89c30b7481590947ef78bd5a4c24f5810f56531'
+  appcast 'https://sourceforge.net/projects/something/rss'
   homepage 'https://sourceforge.net/projects/something/'
 end
diff --git a/Library/Homebrew/test/support/fixtures/cask/Casks/with-appcast.rb b/Library/Homebrew/test/support/fixtures/cask/Casks/with-appcast.rb
index fc57e5e653..aa32c7a393 100644
--- a/Library/Homebrew/test/support/fixtures/cask/Casks/with-appcast.rb
+++ b/Library/Homebrew/test/support/fixtures/cask/Casks/with-appcast.rb
@@ -3,8 +3,7 @@ cask 'with-appcast' do
   sha256 '67cdb8a02803ef37fdbf7e0be205863172e41a561ca446cd84f0d7ab35a99d94'
 
   url "file://#{TEST_FIXTURE_DIR}/cask/caffeine.zip"
-  appcast 'http://example.com/appcast.xml',
-          checkpoint: '67cdb8a02803ef37fdbf7e0be205863172e41a561ca446cd84f0d7ab35a99d94'
+  appcast 'http://example.com/appcast.xml'
   homepage 'http://example.com/with-appcast'
 
   app 'Caffeine.app'