How can test code with CONNECT_COUNT > ${client_number} work?

[GrasshopperBears]

When we see the test case, let's say TestEnv_Reliable.TestAccept_Backlog1, there are 6 clients and ACCEPT_COUNT is 10.
As far as I know, accept() should be blocked if there's no pending connection, so after dealing with 3 clients(backlog=3), returning 3 times of accept call, I think 4th accept() call cannot be returned.
Then how the test code can work with this case?

[Pusnow]

In the test case, there is EXPECT_ACCEPT value.

KENSv3/app/kens/testhandshake.cpp

Lines 205 to 207 in 0226d32

	accept_env["ACCEPT_COUNT"] = "10";
	accept_env["EXPECT_ACCEPT"] = "3";
	accept_env["ACCEPT_PERIOD"] = "0";

Then how the test code can work with this case?
Test code will counts successful accept and compare it with the EXPECT_ACCEPT value.

[GrasshopperBears]

Thank you 👍