diff --git a/dotnet/tests/Microsoft.Agents.AI.DevUI.UnitTests/DevUIIntegrationTests.cs b/dotnet/tests/Microsoft.Agents.AI.DevUI.UnitTests/DevUIIntegrationTests.cs
index 029a650785..bbecb7fc01 100644
--- a/dotnet/tests/Microsoft.Agents.AI.DevUI.UnitTests/DevUIIntegrationTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.DevUI.UnitTests/DevUIIntegrationTests.cs
@@ -172,7 +172,7 @@ public async Task TestServerWithDevUI_ResolvesMultipleWorkflows_ByKeyAsync()
         Assert.Contains(discoveryResponse.Entities, e => e.Name == "workflow-three" && e.Type == "workflow");
     }
 
-    [Fact]
+    [Fact(Skip = "Flaky in merge_group; see https://github.com/microsoft/agent-framework/issues/5845")]
     public async Task TestServerWithDevUI_ResolvesWorkflows_WithKeyedAndDefaultRegistrationAsync()
     {
         // Arrange