Minister Julia Lopez vows to look into Labour claims that the government "appears to have outsourced itself".
Critics say small print in contracts worth £323m shows firm is "marking its own homework" and civil service impartiality is being undermined.
Government officials reveal new figure, as they plan to spend £15bn in just three months on more testing.
The National Audit Office found standards were consistently missed.
The government has been accused of failing to tell local authorities about the closure.
Hundreds of branches will shut down, costing nearly 1800 jobs in total.
Administrators have failed to find a buyer for the business.
Deloitte's report warned Theresa May has no EU exit strategy.
Institute for Government warns 'silence is not a strategy' after leak.