What is the naming convention for tables that keep track of the many-to-many relationships between other tables?

I'm embarrassingly enough stuck开发者_Python百科 in one of my projects because I can't think of a name for this third table. My two first tables are called

pltest

and

pltest_foo

Each pltest (Ping Loss Test) can have many pltest_foos and vice versa. What to I call the third table that keeps track of the connections?

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I usually just join the two table names with an underscore, although that would probably look odd in this case: pltest_pltest_foo. There's no real need to get any fancier than that, usually.

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In my opinion pltest_pltest_foo would suffice.