diff --git a/eng/pipelines/common/evaluate-default-paths.yml b/eng/pipelines/common/evaluate-default-paths.yml
index 5fb74a3741f413..0e4279a9697b94 100644
--- a/eng/pipelines/common/evaluate-default-paths.yml
+++ b/eng/pipelines/common/evaluate-default-paths.yml
@@ -241,6 +241,7 @@ jobs:
       - src/mono/tools/*
       - src/mono/wasi/*
       - src/mono/wasm/debugger/*
+      - src/mono/wasm/host/*
       - src/mono/wasm/Wasm.Build.Tests/*
       - ${{ parameters._const_paths._wasm_pipelines }}
       - ${{ parameters._const_paths._always_exclude }}
@@ -258,6 +259,7 @@ jobs:
       - eng/testing/workloads-testing.targets
       - src/mono/mono/component/mini-wasm-debugger.c
       - src/mono/wasm/debugger/*
+      - src/mono/wasm/host/*
       - src/mono/wasm/Wasm.Build.Tests/*
       - src/mono/nuget/Microsoft.NET.Runtime*
         src/mono/nuget/Microsoft.NET.Sdk.WebAssembly.Pack/*
diff --git a/src/mono/wasm/host/BrowserHost.cs b/src/mono/wasm/host/BrowserHost.cs
index adb24f81f88dac..cbe160eeb0214a 100644
--- a/src/mono/wasm/host/BrowserHost.cs
+++ b/src/mono/wasm/host/BrowserHost.cs
@@ -74,7 +74,7 @@ private async Task RunAsync(ILoggerFactory loggerFactory, CancellationToken toke
                                                debugging: _args.CommonConfig.Debugging);
         runArgsJson.Save(Path.Combine(_args.CommonConfig.AppPath, "runArgs.json"));
 
-        string[] urls = envVars.TryGetValue("ASPNETCORE_URLS", out string? aspnetUrls)
+        string[] urls = (envVars.TryGetValue("ASPNETCORE_URLS", out string? aspnetUrls) && aspnetUrls.Length > 0)
                             ? aspnetUrls.Split(';', StringSplitOptions.RemoveEmptyEntries)
                             : new string[] { $"http://127.0.0.1:{_args.CommonConfig.HostProperties.WebServerPort}", "https://127.0.0.1:0" };
 
diff --git a/src/mono/wasm/host/DevServer/DevServer.cs b/src/mono/wasm/host/DevServer/DevServer.cs
index 1acbe6954eeb3b..9a5a079cee695e 100644
--- a/src/mono/wasm/host/DevServer/DevServer.cs
+++ b/src/mono/wasm/host/DevServer/DevServer.cs
@@ -46,7 +46,8 @@ internal static class DevServer
                 services.AddSingleton(Options.Create(options));
                 services.AddSingleton(realUrlsAvailableTcs);
                 services.AddRouting();
-            });
+            })
+            .UseUrls(options.Urls);
 
 
         IWebHost? host = builder.Build();
diff --git a/src/mono/wasm/host/RuntimeConfigJson.cs b/src/mono/wasm/host/RuntimeConfigJson.cs
index ed698ed8fb3725..3ad30dd88015ae 100644
--- a/src/mono/wasm/host/RuntimeConfigJson.cs
+++ b/src/mono/wasm/host/RuntimeConfigJson.cs
@@ -24,7 +24,7 @@ internal sealed record WasmHostProperties(
      int? FirefoxDebuggingPort,
      int? ChromeProxyPort,
      int? ChromeDebuggingPort,
-     int WebServerPort = 9000)
+     int WebServerPort = 0)
 {
     // using an explicit property because the deserializer doesn't like
     // extension data in the record constructor