}

				rel := search.InDir(a.Target, testGOROOT)
				if rel == "" {
					return nil
				}

				callerPos := ""
				if _, file, line, ok := runtime.Caller(1); ok {
					if shortFile := search.InDir(file, filepath.Join(testGOROOT, "src")); shortFile != "" {
						file = shortFile
					}
					callerPos = fmt.Sprintf("%s:%d: ", file, line)
				}