diff --git a/extensions/typescript-language-features/src/configuration/fileSchemes.ts b/extensions/typescript-language-features/src/configuration/fileSchemes.ts
index ca268e29e0b..9d54f0b67a7 100644
--- a/extensions/typescript-language-features/src/configuration/fileSchemes.ts
+++ b/extensions/typescript-language-features/src/configuration/fileSchemes.ts
@@ -21,21 +21,24 @@ export const officeScript = 'office-script';
 /** Used for code blocks in chat by vs code core */
 export const chatCodeBlock = 'vscode-chat-code-block';
 
-/** Used for code blocks in chat by copilot. */
-export const chatBackingCodeBlock = 'vscode-copilot-chat-code-block';
-
 export function getSemanticSupportedSchemes() {
-	if (isWeb() && vscode.workspace.workspaceFolders) {
-		return vscode.workspace.workspaceFolders.map(folder => folder.uri.scheme);
-	}
-
-	return [
-		file,
+	const alwaysSupportedSchemes = [
 		untitled,
 		walkThroughSnippet,
 		vscodeNotebookCell,
 		chatCodeBlock,
-		chatBackingCodeBlock,
+	];
+
+	if (isWeb()) {
+		return [
+			...(vscode.workspace.workspaceFolders ?? []).map(folder => folder.uri.scheme),
+			...alwaysSupportedSchemes,
+		];
+	}
+
+	return [
+		file,
+		...alwaysSupportedSchemes,
 	];
 }
 
diff --git a/extensions/typescript-language-features/src/languageFeatures/workspaceSymbols.ts b/extensions/typescript-language-features/src/languageFeatures/workspaceSymbols.ts
index 3240c524781..24fb7068b74 100644
--- a/extensions/typescript-language-features/src/languageFeatures/workspaceSymbols.ts
+++ b/extensions/typescript-language-features/src/languageFeatures/workspaceSymbols.ts
@@ -94,7 +94,7 @@ class TypeScriptWorkspaceSymbolProvider implements vscode.WorkspaceSymbolProvide
 		}
 
 		const uri = this.client.toResource(item.file);
-		if (fileSchemes.isOfScheme(uri, fileSchemes.chatCodeBlock, fileSchemes.chatBackingCodeBlock)) {
+		if (fileSchemes.isOfScheme(uri, fileSchemes.chatCodeBlock)) {
 			return;
 		}
 
diff --git a/extensions/typescript-language-features/src/tsServer/bufferSyncSupport.ts b/extensions/typescript-language-features/src/tsServer/bufferSyncSupport.ts
index 356c1703831..56d2896fa33 100644
--- a/extensions/typescript-language-features/src/tsServer/bufferSyncSupport.ts
+++ b/extensions/typescript-language-features/src/tsServer/bufferSyncSupport.ts
@@ -197,7 +197,7 @@ class SyncedBuffer {
 			return tsRoot?.startsWith(inMemoryResourcePrefix) ? undefined : tsRoot;
 		}
 
-		return fileSchemes.isOfScheme(resource, fileSchemes.officeScript, fileSchemes.chatCodeBlock, fileSchemes.chatBackingCodeBlock) ? '/' : undefined;
+		return fileSchemes.isOfScheme(resource, fileSchemes.officeScript, fileSchemes.chatCodeBlock) ? '/' : undefined;
 	}
 
 	public get resource(): vscode.Uri {
@@ -752,7 +752,7 @@ export default class BufferSyncSupport extends Disposable {
 	}
 
 	private shouldValidate(buffer: SyncedBuffer): boolean {
-		if (fileSchemes.isOfScheme(buffer.resource, fileSchemes.chatCodeBlock, fileSchemes.chatBackingCodeBlock)) {
+		if (fileSchemes.isOfScheme(buffer.resource, fileSchemes.chatCodeBlock)) {
 			return false;
 		}