The demand for COVID-19 testing in Canberra is so high, the gates to the EPIC testing centre have been closed.
Canberrans are being told by ACT Health to say away from the testing site, because you won't get in.
People had reported waiting more than four hours for a test on Monday at EPIC.
ACT Health Minister Rachel Stephen-Smith said testing capacity at all sites had been increased over the weekend.
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"We continue to see waiting times vary across our sites throughout each day," Ms Stephen-Smith said.
The ACT collected 5723 tests on Sunday.
Chief Minister Andrew Barr on Monday said the ACT had significantly upscaled its testing capacity, but asked for some patience and understanding.
"To put this in perspective, 6000 tests in the ACT is the equivalent of around 125,000 tests in NSW or around 100,000 in Victoria, or around 65,000 tests in Queensland. It's a massive testing effort," Mr Barr said.