1 files changed, 6 insertions, 1 deletions
diff --git a/actionpack/test/controller/rack_test.rb b/actionpack/test/controller/rack_test.rb
index 31bff4ae6d..8fd004a9e9 100644
--- a/actionpack/test/controller/rack_test.rb
+++ b/actionpack/test/controller/rack_test.rb
@@ -236,7 +236,12 @@ class RackResponseTest < BaseRackTest
 
     status, headers, body = @response.to_a
     assert_equal 200, status
-    assert_equal({"Content-Type" => "text/html; charset=utf-8", "Cache-Control" => "no-cache", "Set-Cookie" => []}, headers)
+    assert_equal({
+      "Content-Type" => "text/html; charset=utf-8",
+      "Content-Length" => "",
+      "Cache-Control" => "no-cache",
+      "Set-Cookie" => []
+    }, headers)
 
     parts = []
     body.each { |part| parts << part }