diff --git a/src/vs/workbench/services/languageRuntime/common/languageRuntimeUiClient.ts b/src/vs/workbench/services/languageRuntime/common/languageRuntimeUiClient.ts
index e35ffea1725..9724532b252 100644
--- a/src/vs/workbench/services/languageRuntime/common/languageRuntimeUiClient.ts
+++ b/src/vs/workbench/services/languageRuntime/common/languageRuntimeUiClient.ts
@@ -161,14 +161,9 @@ export class UiClientInstance extends Disposable {
 
 		// Wrap the ShowHtmlFile event to start a proxy server for the HTML file.
 		this._register(this._comm.onDidShowHtmlFile(async e => {
-			let uri: URI;
 			try {
-				if (e.path.endsWith('.html') || e.path.endsWith('.htm')) {
-					// Start an HTML proxy server for the file
-					uri = await this.startHtmlProxyServer(e.path);
-				} else {
-					uri = URI.parse(e.path);
-				}
+				// Start an HTML proxy server for the file
+				const uri = await this.startHtmlProxyServer(e.path);
 
 				if (e.is_plot) {
 					// Check the configuration to see if we should open the plot