diff --git a/config.ru b/config.ru
new file mode 100644
index 00000000..65ce25ff
--- /dev/null
+++ b/config.ru
@@ -0,0 +1 @@
+run(proc{|env| [200, {}, [env['HTTP_FOO'].inspect, "\n"]]})
\ No newline at end of file
diff --git a/test/test_http11.rb b/test/test_http11.rb
index 2a300470..3725a639 100644
--- a/test/test_http11.rb
+++ b/test/test_http11.rb
@@ -2,6 +2,7 @@
 # Copyright (c) 2005 Zed A. Shaw
 
 require_relative "helper"
+require "digest"
 
 require "puma/puma_http11"
 
@@ -181,6 +182,17 @@ class Http11ParserTest < Minitest::Test
         parser.reset
       end
     end
+  end
+  
+  # https://github.com/puma/puma/issues/1890
+  def test_trims_whitespace_from_headers
+    skip("Known failure, see issue 1890 on GitHub")
+    parser = Puma::HttpParser.new
+    req = {}
+    http = "GET / HTTP/1.1\r\nX-Strip-Me: Strip This       \r\n\r\n"
 
+    nread = parser.execute(req, http, 0)
+    
+    assert_equal "Strip This", req["HTTP_X_STRIP_ME"]
   end
 end