@@ -65,7 +65,7 @@ export async function testSolution(uri?: vscode.Uri): Promise<void> {
 }
 break;
 case ":file":
-const testFile: vscode.Uri[] | undefined = await showFileSelectDialog();
+const testFile: vscode.Uri[] | undefined = await showFileSelectDialog(filePath);
 if (testFile && testFile.length) {
 const input: string = (await fse.readFile(testFile[0].fsPath, "utf-8")).trim();
 if (input) {

@@ -80,8 +80,8 @@ export async function openKeybindingsEditor(query?: string): Promise<void> {
 await vscode.commands.executeCommand("workbench.action.openGlobalKeybindings", query);
 }
 
-export async function showFileSelectDialog(): Promise<vscode.Uri[] | undefined> {
-const defaultUri: vscode.Uri | undefined = vscode.workspace.rootPath ? vscode.Uri.file(vscode.workspace.rootPath) : undefined;
+export async function showFileSelectDialog(fsPath?: string): Promise<vscode.Uri[] | undefined> {
+const defaultUri: vscode.Uri | undefined = getBelongingWorkspaceFolderUri(fsPath);
 const options: vscode.OpenDialogOptions = {
 defaultUri,
 canSelectFiles: true,
@@ -92,8 +92,19 @@ export async function showFileSelectDialog(): Promise<vscode.Uri[] | undefined>
 return await vscode.window.showOpenDialog(options);
 }
 
-export async function showDirectorySelectDialog(): Promise<vscode.Uri[] | undefined> {
-const defaultUri: vscode.Uri | undefined = vscode.workspace.rootPath ? vscode.Uri.file(vscode.workspace.rootPath) : undefined;
+function getBelongingWorkspaceFolderUri(fsPath: string | undefined): vscode.Uri | undefined {
+let defaultUri: vscode.Uri | undefined;
+if (fsPath) {
+const workspaceFolder: vscode.WorkspaceFolder | undefined = vscode.workspace.getWorkspaceFolder(vscode.Uri.file(fsPath));
+if (workspaceFolder) {
+defaultUri = workspaceFolder.uri;
+}
+}
+return defaultUri;
+}
+
+export async function showDirectorySelectDialog(fsPath?: string): Promise<vscode.Uri[] | undefined> {
+const defaultUri: vscode.Uri | undefined = getBelongingWorkspaceFolderUri(fsPath);
 const options: vscode.OpenDialogOptions = {
 defaultUri,
 canSelectFiles: false,