Fatal error: Allowed memory size of 33554432 bytes exhaustsed

when follow the Jobeet tutorial to Day 9, functional test,  got problem with the following test:

php symfony test:functional frontend
categoryActionsTest..................................................dubious
    Test returned status 139
    Failed tests: 0
jobActionsTest.......................................................dubious
    Test returned status 139
    Failed tests: 0
Failed Test                     Stat  Total   Fail  List of Failed
------------------------------------------------------------------
categoryActionsTest              139      1      1  0
jobActionsTest                   139      1      1  0
Failed 2/2 test scripts, 0.00% okay. 2/0 subtests failed, 0.00% okay.  

went further to teste the code one by one then found the fatal error:

php symfony test:functional frontend categoryActions
> 1 - The category page
>   1.1 - Categories on homepage are clickable
# get /

Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 30720 bytes) 
in /home/ddd/projects/jobeet/lib/vendor/symfony/lib/helper/PartialHelper.php on line 148

went to /etc/php5/apache2 to edit php.ini to change the memory limit to 128M then restart apache it didn't help.
went to /etc/php5/cli to edit php.ini to change the memory limit to 128M then restart apache, it only pass 3 tests then threw Segmentation fault again...

added the following in front the test code

$browser->with('response')->debug; 

and run test again, the response debug showed there were too many job records returned(about 30 jobs), that's why memory was running out?