diff --git a/config/docker/danbooru-base b/config/docker/danbooru-base
index da68c57d0..9a5fd9b8b 100644
--- a/config/docker/danbooru-base
+++ b/config/docker/danbooru-base
@@ -8,7 +8,7 @@ RUN apt-get update && \
   wget -q https://github.com/jwilder/dockerize/releases/download/$DOCKERIZE_VERSION/dockerize-linux-amd64-$DOCKERIZE_VERSION.tar.gz && \
   tar -C /usr/local/bin -xzvf dockerize-linux-amd64-$DOCKERIZE_VERSION.tar.gz  && \
   rm dockerize-linux-amd64-$DOCKERIZE_VERSION.tar.gz && \
-  apt-get -y install -qq apt-utils build-essential automake libssl-dev libxml2-dev libxslt-dev ncurses-dev sudo libreadline-dev flex bison ragel memcached libmemcached-dev git curl libcurl4-openssl-dev imagemagick libmagickcore-dev libmagickwand-dev sendmail-bin sendmail postgresql-client libpq-dev nginx ssh coreutils ffmpeg mkvtoolnix emacs24-nox telnet && \
+  apt-get -y install -qq apt-utils build-essential automake libssl-dev libxml2-dev libxslt-dev ncurses-dev sudo libreadline-dev flex bison ragel memcached libmemcached-dev git curl libcurl4-openssl-dev imagemagick libmagickcore-dev libmagickwand-dev sendmail-bin sendmail postgresql-client libpq-dev nginx ssh coreutils ffmpeg mkvtoolnix emacs24-nox telnet libgif-dev && \
   apt-get clean && \
   cd /tmp && \
   wget -q https://github.com/jcupitt/libvips/releases/download/v$VIPS_VERSION/vips-$VIPS_VERSION.tar.gz && \
diff --git a/test/functional/post_replacements_controller_test.rb b/test/functional/post_replacements_controller_test.rb
index a36c41726..e92e0e01b 100644
--- a/test/functional/post_replacements_controller_test.rb
+++ b/test/functional/post_replacements_controller_test.rb
@@ -7,7 +7,7 @@ class PostReplacementsControllerTest < ActionDispatch::IntegrationTest
 
       @user = create(:moderator_user, can_approve_posts: true, created_at: 1.month.ago)
       @user.as_current do
-        @post = create(:post)
+        @post = create(:post, source: "https://google.com")
         @post_replacement = create(:post_replacement, post: @post)
       end
     end
@@ -22,7 +22,7 @@ class PostReplacementsControllerTest < ActionDispatch::IntegrationTest
           format: :json,
           post_id: @post.id,
           post_replacement: {
-            replacement_url: "https://www.google.com/intl/en_ALL/images/logo.gif",
+            replacement_url: "https://raikou1.donmai.us/d3/4e/d34e4cf0a437a5d65f8e82b7bcd02606.jpg",
           }
         }
 
@@ -36,9 +36,9 @@ class PostReplacementsControllerTest < ActionDispatch::IntegrationTest
         end
 
         assert_response :success
-        assert_equal("https://www.google.com/intl/en_ALL/images/logo.gif", @post.source)
-        assert_equal("e80d1c59a673f560785784fb1ac10959", @post.md5)
-        assert_equal("e80d1c59a673f560785784fb1ac10959", Digest::MD5.file(@post.file(:original)).hexdigest)
+        assert_equal("https://raikou1.donmai.us/d3/4e/d34e4cf0a437a5d65f8e82b7bcd02606.jpg", @post.source)
+        assert_equal("d34e4cf0a437a5d65f8e82b7bcd02606", @post.md5)
+        assert_equal("d34e4cf0a437a5d65f8e82b7bcd02606", Digest::MD5.file(@post.file(:original)).hexdigest)
       end
     end
 
diff --git a/test/models/upload_service_test.rb b/test/models/upload_service_test.rb
index de1eeefd4..f900aab2a 100644
--- a/test/models/upload_service_test.rb
+++ b/test/models/upload_service_test.rb
@@ -734,10 +734,18 @@ class UploadServiceTest < ActiveSupport::TestCase
             as_user do
               @post1.replace!(replacement_url: "https://www.pixiv.net/member_illust.php?mode=medium&illust_id=62247350")
               @post2.replace!(replacement_url: "https://www.pixiv.net/member_illust.php?mode=medium&illust_id=62247364")
-              @post2.replace!(replacement_url: "https://www.google.com/intl/en_ALL/images/logo.gif")
+              assert_equal("4ceadc314938bc27f3574053a3e1459a", @post1.md5)
+              assert_equal("cad1da177ef309bf40a117c17b8eecf5", @post2.md5)
+              @post2.reload
+              @post2.replace!(replacement_url: "https://raikou1.donmai.us/d3/4e/d34e4cf0a437a5d65f8e82b7bcd02606.jpg")
+              assert_equal("d34e4cf0a437a5d65f8e82b7bcd02606", @post2.md5)
               Upload.destroy_all
+              @post1.reload
+              @post2.reload
               @post1.replace!(replacement_url: "https://www.pixiv.net/member_illust.php?mode=medium&illust_id=62247364")
               @post2.replace!(replacement_url: "https://www.pixiv.net/member_illust.php?mode=medium&illust_id=62247350")
+              assert_equal("cad1da177ef309bf40a117c17b8eecf5", @post1.md5)
+              assert_equal("4ceadc314938bc27f3574053a3e1459a", @post2.md5)
             end
 
             Timecop.travel(Time.now + PostReplacement::DELETION_GRACE_PERIOD + 1.day) do
@@ -830,7 +838,7 @@ class UploadServiceTest < ActiveSupport::TestCase
       end
 
       should "should fail validation" do
-        service = subject.new(file: upload_file("test/files/test-static-32x32.gif"))
+        service = subject.new(file: upload_file("test/files/test-large.jpg"))
         upload = service.start!
         assert_match(/image resolution is too large/, upload.status)
       end