German Chancellor Angela Merkel will ask lawmakers to back an 86 billion euro ($95.5 billion) bailout for Greece at a special session of parliament on Wednesday despite uncertainty about whether the International Monetary Fund (IMF) is on board, Reuters reported.

Parliamentary approval is not in doubt because the Social Democrats (SPD) and Greens are expected to back the rescue but the vote could expose divisions in Merkel's conservative ranks.

The vote is shaping up as a major test for both Merkel and one of her closest allies, the head of her conservative bloc in parliament, Volker Kauder.