For fans of McDonald 's breakfast menu who have dreamed of the day it was served outside of morning hours , the time has come ... but only as a test run in San Diego . Select locations will serve all-day breakfast with the partial menu featuring some of the chain 's breakfast sandwiches and hash browns . The exact sandwiches have not been revealed . Scroll down for video . McDonald 's will begin testing an all-day breakfast menu in April at select locations in San Diego . The test will begin in April as the move comes in response to customers saying they wanted breakfast items outside of morning hours , according to the company . Depending on how successful the test is , the chain could expand the all-day breakfast menu to other markets , according to Business Insider . Last month , the fast-food chain began looking at how it could make breakfast available later in the day , said Jeff Stratton , head of McDonald 's USA . Offering both the breakfast menu past 10.30am alongside the lunch menu had been considered logistically impossible , given the tight kitchen spaces of the restaurants . McDonald 's even tweeted about the topic in February , saying it does not serve breakfast all day because its grills 'just are n't big enough for breakfast and lunch . ' On their website in response to why they do not serve breakfast all day the company wrote : 'Here ’ s the thing : it comes down to the sheer size of kitchen grills . 'They simply don ’ t have the room for all of our menu options at one time — especially considering we use our grill to prepare many items on our breakfast menu . ' The push to make breakfast available outside normal hours partly reflects how McDonald 's is working to keep pace with shifting habits . In particular , executives have noted that customers increasingly want foods personalized to their tastes and schedules . Breakfast also accounts for about 25percent of sales at McDonald 's , and is the strongest part of the day for the chain , according to the Chicago Tribune . If the test is successful , McDonald 's could expand the all-day breakfast menu to other markets . 'We look forward to learning from this test , and it 's premature to speculate on any outcomes , ' wrote spokeswoman Terri Hickey in an email , according to CNBC . 'We 're excited to serve our customers in this area some of McDonald 's great-tasting breakfast sandwiches , hash browns and other favorites all day long . ' McDonald 's said on Monday that it was too early to speculate on any outcomes from the test . Janney Capital Markets had released an analyst note earlier and said that their industry sources had told them McDonald 's planned to test all-day breakfast in the U.S . The analyst note was released before McDonald 's confirmed the report . 'Having those breakfast items available to sell all day would also serve as a reminder to customers ( and the media . and Wall Street . ) that McDonald 's does indeed have craveable food to sell , ' Janney analyst Mark Kalinowski wrote .
Fast-food chain will begin test in April at select locations in San Diego . The partial menu will feature some breakfast sandwiches and hash browns . Move comes as customers said they wanted breakfast served past 10.30am . Comment: