DBConnection.ConnectionError - requestes are coming in and your connection pool cannot serve them fast enough

Hi,

I am running tests, and some of them are returning this error →

     ** (DBConnection.ConnectionError) connection not available and request was dropped from queue after 1998ms. This means requests are coming in and your connection pool cannot serve them fast enough. You can address this by:
     
       1. Ensuring your database is available and that you can connect to it
       2. Tracking down slow queries and making sure they are running fast enough
       3. Increasing the pool_size (albeit it increases resource consumption)
       4. Allowing requests to wait longer by increasing :queue_target and :queue_interval
     
     See DBConnection.start_link/2 for more information

I tried increasing pool_size to 20 and queue_target to 5000, however that didn’t do a trick.

I would like to add that when I run tests separately on a file where such issue occurred, it passes with no errors, however when I run all the tests together, the problem occurs.

I am stuck and will be thankful for help!