As a reminder, here is what the WHO said:

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The World Health Organization called on all countries on Monday to ramp up their testing programs as the best way to slow the advance of the coronavirus pandemic, and also urged companies to boost production of vital equipment to overcome acute shortages.

“We have a simple message to all countries - test, test, test,” WHO Director General Tedros Adhanom Ghebreyesus told a news conference in Geneva, calling the pandemic “the defining global health crisis of our time”.


WHO calls for "change of mindset" to overcome pandemic shortages
“All countries should be able to test all suspected cases, they cannot fight this pandemic blindfolded.”
Without testing, cases cannot be isolated and the chain of infection will not be broken, he said.