diff --git a/src/mono/sample/wasm/browser-eventpipe/Wasm.Browser.EventPipe.Sample.csproj b/src/mono/sample/wasm/browser-eventpipe/Wasm.Browser.EventPipe.Sample.csproj
index 6dc96ec2632b6..57d89fd934304 100644
--- a/src/mono/sample/wasm/browser-eventpipe/Wasm.Browser.EventPipe.Sample.csproj
+++ b/src/mono/sample/wasm/browser-eventpipe/Wasm.Browser.EventPipe.Sample.csproj
@@ -7,7 +7,7 @@
     <WasmDebugLevel>1</WasmDebugLevel>
     <WasmBuildNative>true</WasmBuildNative>
     <GenerateRunScriptForSample Condition="'$(ArchiveTests)' == 'true'">true</GenerateRunScriptForSample>
-    <RunScriptCommand>$(ExecXHarnessCmd) wasm test-browser  --app=. --browser=Chrome $(XHarnessBrowserPathArg) --html-file=index.html --output-directory=$(XHarnessOutput) -- $(MSBuildProjectName).dll</RunScriptCommand>
+    <RunScriptCommand>$(ExecXHarnessCmd) wasm test-browser  --app=. --browser=Chrome $(XHarnessBrowserPathArg) --html-file=index.html --output-directory=$(XHarnessOutput) --web-server-use-cop -- $(MSBuildProjectName).dll</RunScriptCommand>
     <FeatureWasmPerfTracing>true</FeatureWasmPerfTracing>
     <FeatureWasmThreads Condition="false">true</FeatureWasmThreads>
     <NoWarn>$(NoWarn);CA2007</NoWarn> <!-- consider ConfigureAwait() -->