The House of Commons Catering Service has withdrawn four beef products from its outlets that were supplied by grocery and fresh food supplier Brakes.
Brakes is currently carrying out tests on its products containing beef.
"A supplier (Brakes) to the House of Commons Catering Service is currently carrying out tests on its products containing beef," a Commons spokesman said.
"As a precautionary measure, the House of Commons Catering Service has removed from its shelves four beef items supplied by Brakes.
"This relates to meat derivative products rather than to fresh meat provided at the House of Commons.
"Brakes have issued a statement indicating they expect to have completed testing on their own brand beef meat containing products by February 22.
"Tests on two of the four items have been completed so far; both tests have concluded negative for equine DNA."