From b3293f1b2e29534682fbf7a14dfc2698d152f171 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Mon, 16 Feb 2026 14:39:54 +0000
Subject: [PATCH 1/3] Initial plan


From 43edf4de706872abbed8ea467cf89e165cb526d5 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Mon, 16 Feb 2026 15:03:32 +0000
Subject: [PATCH 2/3] Replace ActiveIssue with SkipOnPlatform for HTTP/1
 trailing headers on Browser

Co-authored-by: oroztocil <79744616+oroztocil@users.noreply.github.com>
---
 .../tests/FunctionalTests/SocketsHttpHandlerTest.cs             | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libraries/System.Net.Http/tests/FunctionalTests/SocketsHttpHandlerTest.cs b/src/libraries/System.Net.Http/tests/FunctionalTests/SocketsHttpHandlerTest.cs
index ea4bc42927864d..a5c0bc738d367d 100644
--- a/src/libraries/System.Net.Http/tests/FunctionalTests/SocketsHttpHandlerTest.cs
+++ b/src/libraries/System.Net.Http/tests/FunctionalTests/SocketsHttpHandlerTest.cs
@@ -932,7 +932,7 @@ await LoopbackServerFactory.CreateClientAndServerAsync(async uri =>
         }
     }
 
-    [ActiveIssue("https://github.com/dotnet/runtime/issues/54156", TestPlatforms.Browser)]
+    [SkipOnPlatform(TestPlatforms.Browser, "Trailer headers are not supported on Browser")]
     public sealed class SocketsHttpHandler_Http1_TrailingHeaders_Test : SocketsHttpHandler_TrailingHeaders_Test
     {
         public SocketsHttpHandler_Http1_TrailingHeaders_Test(ITestOutputHelper output) : base(output) { }

From efcd35a080a5ec69e681010208f71505cb3edb29 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Mon, 16 Feb 2026 15:40:18 +0000
Subject: [PATCH 3/3] Update SkipOnPlatform message to specify HTTP/1 trailers
 and browser support

Co-authored-by: oroztocil <79744616+oroztocil@users.noreply.github.com>
---
 .../tests/FunctionalTests/SocketsHttpHandlerTest.cs             | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libraries/System.Net.Http/tests/FunctionalTests/SocketsHttpHandlerTest.cs b/src/libraries/System.Net.Http/tests/FunctionalTests/SocketsHttpHandlerTest.cs
index a5c0bc738d367d..dad5f0be35bc6a 100644
--- a/src/libraries/System.Net.Http/tests/FunctionalTests/SocketsHttpHandlerTest.cs
+++ b/src/libraries/System.Net.Http/tests/FunctionalTests/SocketsHttpHandlerTest.cs
@@ -932,7 +932,7 @@ await LoopbackServerFactory.CreateClientAndServerAsync(async uri =>
         }
     }
 
-    [SkipOnPlatform(TestPlatforms.Browser, "Trailer headers are not supported on Browser")]
+    [SkipOnPlatform(TestPlatforms.Browser, "HTTP/1 trailers are not supported by most major browsers")]
     public sealed class SocketsHttpHandler_Http1_TrailingHeaders_Test : SocketsHttpHandler_TrailingHeaders_Test
     {
         public SocketsHttpHandler_Http1_TrailingHeaders_Test(ITestOutputHelper output) : base(output) { }