(NBC News) — Walmart and Kroger raised the price of Abbott’s at-home Covid-19 test kit after an agreement with the White House to sell the tests at a reduced price expired, the companies said Tuesday.

The BinaxNOW kit, one of the first at-home tests to be authorized by the federal government, was listed on Walmart’s website Tuesday for $19.88, up from $14 last month. Kroger listed the tests for $23.99.

President Joe Biden announced the agreement with Walmart, Amazon and Kroger in September, saying it was part of his administration’s plan to ramp up testing and “better detect and control” the coronavirus variant that then posed the greatest danger — delta. 

The three-month agreement to sell the tests “at cost” expired last month, just as the new omicron variant began advancing quickly across the U.S. 

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