Toyota this week became the latest formula one team to trial a so-called 'shark fin' engine cover at the Hockenheim test.

McLaren has been using a similar concept at the event in Germany, after Red Bull Racing pioneered the striking bodywork earlier this year.

Since then, Renault, Toro Rosso and Force India have also raced 'shark fin' engine covers at grands prix.

Timo Glock debuted Toyota's version over an installation lap on Wednesday, before reverting to a standard engine cover. Teammate Jarno Trulli did a similar thing on Thursday as the three-day test concluded, making it difficult for photographers to capture the moments.

World champion Kimi Raikkonen told reporters that he did not think Ferrari will soon be following suit.

"We do our own thing and put effort into what we think are the key things," said the Finn.

"The fact that others copy us proves that our idea was right," Red Bull racer Mark Webber told the Dutch magazine Formule 1 Race Report.

Source: GMM