diff --git a/src/mono/wasm/Wasm.Build.Tests/Blazor/BlazorWebWasmLogClient.cs b/src/mono/wasm/Wasm.Build.Tests/Blazor/BlazorWebWasmLogClient.cs
index 41d0aa02848ee3..d2eb240f694423 100644
--- a/src/mono/wasm/Wasm.Build.Tests/Blazor/BlazorWebWasmLogClient.cs
+++ b/src/mono/wasm/Wasm.Build.Tests/Blazor/BlazorWebWasmLogClient.cs
@@ -27,7 +27,7 @@ public async Task<BlazorWebWasmRequestLog[]> GetRequestLogsAsync()
     {
         var response = await _httpClient.GetAsync("request-logs");
         response.EnsureSuccessStatusCode();
-        var logs = await response.Content.ReadFromJsonAsync<BlazorWebWasmRequestLog[]>() ?? Array.Empty<BlazorWebWasmRequestLog>();
+        var logs = await response.Content.ReadFromJsonAsync<BlazorWebWasmRequestLog[]>() ?? [];
         return logs;
     }
 
diff --git a/src/mono/wasm/testassets/BlazorWebWasm/BlazorWebWasm/Program.cs b/src/mono/wasm/testassets/BlazorWebWasm/BlazorWebWasm/Program.cs
index 75e324ed11775d..76cbecfb24918f 100644
--- a/src/mono/wasm/testassets/BlazorWebWasm/BlazorWebWasm/Program.cs
+++ b/src/mono/wasm/testassets/BlazorWebWasm/BlazorWebWasm/Program.cs
@@ -11,7 +11,7 @@
 var app = builder.Build();
 
 var requestLogs = new List<BlazorWebWasmRequestLog>();
-var requestLogsLock = new object();
+var requestLogsLock = new Lock();
 
 app.Use(async (context, next) =>
 {