message: Return undefined RunSettings if no workspace
diff: @@ -205,6 +205,9 @@ export default class TestManager extends AbstractProvider {
  // Path is relative to the workspace. Create absolute path.
  const fileUri = vscode.Uri.file(filename);
  const workspaceFolder = vscode.workspace.getWorkspaceFolder(fileUri);
  + if (workspaceFolder === undefined) {
  + return undefined;
  + }
  return path.join(workspaceFolder.uri.fsPath, testSettingsPath);
  }
  