Lists test classes descending ordered by elapsed time to find out which ones are slower than others. Run this BASH script at project's root.

find-out-slower-tests.sh

#!/bin/bash

# Run tests
mvn clean test --fail-never

# Print header
echo
echo "TEST NAME, TESTS COUNT, FAILURES COUNT, ERRORS COUNT, SKIPPED COUNT, TIME ELAPSED"

# Prepare report
filePaths=`find target/surefire-reports -name '*.txt'`

for eachFilePath in ${filePaths}
do

    testName=`echo ${eachFilePath} | sed 's/.txt//g' | sed 's/target\/surefire-reports\///g'`

    testReport=`cat ${eachFilePath} | grep '^Tests run:.*Time elapsed: ' | sed 's/ sec.*//' | sed 's/, /,/g'`
    testReport=${testName}","${testReport}

    echo ${testReport}

done | sort --field-separator=',' -k6 -r | sed 's/,/, /g'