"When the whole world struggles with the effects of the COVID-19 pandemic, Poland does not remain indifferent and helps its foreign partners," the Polish Prime Minister's Office said in a tweet in English.
"In recent months, Poland has organized dozens of aid and medical support actions. Today we help our Slovak friends," it added.
"We want to help test Slovaks as part of their program, especially in border areas," Prime Minister Mateusz Morawiecki told reporters at Warsaw's Okęcie military airport.
"Solidarity is our hallmark," he added.
Morawiecki's top aide, Michał Dworczyk, told the media earlier this week that the mission had been agreed between the Polish prime minister and his Slovak counterpart Igor Matovič.
Earlier, Matovič said his country had accepted a Polish offer of help during mass coronavirus tests, public broadcaster Polish Radio’s IAR news agency reported.
The Polish team is expected to start conducting tests in Slovakia at the weekend, both in areas near the shared border and in other parts of that country, which neighbors Poland to the south, officials have said.
Due to a sharp increase in the number of coronavirus infections in Slovakia, the government on Monday extended shelter-in-place orders for citizens until February 7, the IAR news agency reported.
Mass coronavirus testing is scheduled to run across Slovakia, a country of 5.5 million, until January 26.