Re-enable some HTTP3 tests

src/libraries/System.Net.Http/tests/FunctionalTests/HttpClientHandlerTest.Http3.cs

@@ -72,7 +72,6 @@ public async Task ClientSettingsReceived_Success(int headerSizeLimit)
         }
 
         [Theory]
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/55957")]
         [InlineData(10)]
         [InlineData(100)]
         [InlineData(1000)]
@@ -111,7 +110,6 @@ public async Task SendMoreThanStreamLimitRequests_Succeeds(int streamLimit)
         }
 
         [Theory]
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/56000")]
         [InlineData(10)]
         [InlineData(100)]
         [InlineData(1000)]
@@ -757,7 +755,6 @@ public async Task ResponseCancellation_ServerReceivesCancellation(CancellationTy
         }
 
         [Fact]
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/56265")]
         public async Task ResponseCancellation_BothCancellationTokenAndDispose_Success()
         {
             if (UseQuicImplementationProvider != QuicImplementationProviders.MsQuic)

src/libraries/System.Net.Http/tests/FunctionalTests/HttpClientMiniStressTest.cs

@@ -33,6 +33,7 @@ public void CreateAndDestroyManyClients(int numClients)
     }
 
     [ConditionalClass(typeof(HttpClientHandlerTestBase), nameof(IsMsQuicSupported))]
+    [Collection(nameof(DisableParallelization))]
     public sealed class SocketsHttpHandler_HttpClientMiniStress_Http3_MsQuic : HttpClientMiniStress
     {
         public SocketsHttpHandler_HttpClientMiniStress_Http3_MsQuic(ITestOutputHelper output) : base(output) { }
@@ -85,7 +86,7 @@ await LoopbackServer.CreateServerAsync(async (server, url) =>
                 await server.AcceptConnectionAsync(async connection =>
                 {
                     byte[] postData = new byte[numBytes];
-                    while (!string.IsNullOrEmpty(await connection.ReadLineAsync().ConfigureAwait(false)));
+                    while (!string.IsNullOrEmpty(await connection.ReadLineAsync().ConfigureAwait(false))) ;
                     Assert.Equal(numBytes, await connection.ReadBlockAsync(postData, 0, numBytes));
 
                     await connection.WriteStringAsync(responseText).ConfigureAwait(false);

src/libraries/System.Net.Http/tests/FunctionalTests/ResponseStreamZeroByteReadTests.cs

@@ -129,7 +129,7 @@ public async Task ZeroByteRead_IssuesZeroByteReadOnUnderlyingStream(StreamConfor
                 using Stream clientStream = response.Content.ReadAsStream();
                 Assert.False(sawZeroByteRead.Task.IsCompleted);
 
-                Task<int> zeroByteReadTask = Task.Run(() => StreamConformanceTests.ReadAsync(readMode, clientStream, Array.Empty<byte>(), 0, 0, CancellationToken.None) );
+                Task<int> zeroByteReadTask = Task.Run(() => StreamConformanceTests.ReadAsync(readMode, clientStream, Array.Empty<byte>(), 0, 0, CancellationToken.None));
                 Assert.False(zeroByteReadTask.IsCompleted);
 
                 // The zero-byte read should block until data is actually available
@@ -210,6 +210,7 @@ public Http2ResponseStreamZeroByteReadTest(ITestOutputHelper output) : base(outp
     }
 
     [ConditionalClass(typeof(HttpClientHandlerTestBase), nameof(IsMsQuicSupported))]
+    [Collection(nameof(DisableParallelization))]
     public sealed class Http3ResponseStreamZeroByteReadTest_MsQuic : ResponseStreamZeroByteReadTestBase
     {
         public Http3ResponseStreamZeroByteReadTest_MsQuic(ITestOutputHelper output) : base(output) { }

src/libraries/System.Net.Http/tests/FunctionalTests/TelemetryTest.cs

@@ -769,6 +769,7 @@ public TelemetryTest_Http20(ITestOutputHelper output) : base(output) { }
     }
 
     [ConditionalClass(typeof(HttpClientHandlerTestBase), nameof(IsMsQuicSupported))]
+    [Collection(nameof(DisableParallelization))]
     public sealed class TelemetryTest_Http30_MsQuic : TelemetryTest
     {
         protected override Version UseVersion => HttpVersion.Version30;

src/libraries/System.Net.Quic/tests/FunctionalTests/QuicConnectionTests.cs

@@ -288,6 +288,8 @@ public QuicConnectionTests_MockProvider(ITestOutputHelper output) : base(output)
     }
 
     [ConditionalClass(typeof(QuicTestBase<MsQuicProviderFactory>), nameof(QuicTestBase<MsQuicProviderFactory>.IsSupported))]
+    [Collection(nameof(DisableParallelization))]
+
     public sealed class QuicConnectionTests_MsQuicProvider : QuicConnectionTests<MsQuicProviderFactory>
     {
         public QuicConnectionTests_MsQuicProvider(ITestOutputHelper output) : base(output) { }

src/libraries/System.Net.Quic/tests/FunctionalTests/QuicListenerTests.cs

@@ -65,6 +65,7 @@ public QuicListenerTests_MockProvider(ITestOutputHelper output) : base(output) {
     }
 
     [ConditionalClass(typeof(QuicTestBase<MsQuicProviderFactory>), nameof(QuicTestBase<MsQuicProviderFactory>.IsSupported))]
+    [Collection(nameof(DisableParallelization))]
     public sealed class QuicListenerTests_MsQuicProvider : QuicListenerTests<MsQuicProviderFactory>
     {
         public QuicListenerTests_MsQuicProvider(ITestOutputHelper output) : base(output) { }