3 files changed, 10 insertions, 2 deletions
diff --git a/activestorage/test/models/blob_test.rb b/activestorage/test/models/blob_test.rb
index 202d0fb093..fead17d33a 100644
--- a/activestorage/test/models/blob_test.rb
+++ b/activestorage/test/models/blob_test.rb
@@ -140,6 +140,6 @@ class ActiveStorage::BlobTest < ActiveSupport::TestCase
     def expected_url_for(blob, disposition: :inline, filename: nil)
       filename ||= blob.filename
       query_string = { content_type: blob.content_type, disposition: "#{disposition}; #{filename.parameters}" }.to_param
-      "/rails/active_storage/disk/#{ActiveStorage.verifier.generate(blob.key, expires_in: 5.minutes, purpose: :blob_key)}/#{filename}?#{query_string}"
+      "https://example.com/rails/active_storage/disk/#{ActiveStorage.verifier.generate(blob.key, expires_in: 5.minutes, purpose: :blob_key)}/#{filename}?#{query_string}"
     end
 end
diff --git a/activestorage/test/service/disk_service_test.rb b/activestorage/test/service/disk_service_test.rb
index 4a6361b920..d7142de458 100644
--- a/activestorage/test/service/disk_service_test.rb
+++ b/activestorage/test/service/disk_service_test.rb
@@ -8,7 +8,7 @@ class ActiveStorage::Service::DiskServiceTest < ActiveSupport::TestCase
   include ActiveStorage::Service::SharedServiceTests
 
   test "url generation" do
-    assert_match(/rails\/active_storage\/disk\/.*\/avatar\.png\?content_type=image%2Fpng&disposition=inline/,
+    assert_match(/^https:\/\/example.com\/rails\/active_storage\/disk\/.*\/avatar\.png\?content_type=image%2Fpng&disposition=inline/,
       @service.url(FIXTURE_KEY, expires_in: 5.minutes, disposition: :inline, filename: ActiveStorage::Filename.new("avatar.png"), content_type: "image/png"))
   end
 end
diff --git a/activestorage/test/test_helper.rb b/activestorage/test/test_helper.rb
index 043890832d..028874f374 100644
--- a/activestorage/test/test_helper.rb
+++ b/activestorage/test/test_helper.rb
@@ -41,6 +41,14 @@ ActiveStorage.verifier = ActiveSupport::MessageVerifier.new("Testing")
 class ActiveSupport::TestCase
   self.file_fixture_path = File.expand_path("fixtures/files", __dir__)
 
+  setup do
+    ActiveStorage::Current.host = "https://example.com"
+  end
+
+  teardown do
+    ActiveStorage::Current.reset
+  end
+
   private
     def create_blob(data: "Hello world!", filename: "hello.txt", content_type: "text/plain")
       ActiveStorage::Blob.create_after_upload! io: StringIO.new(data), filename: filename, content_type: content_type