diff --git a/test/README b/test/README
index ebfa1786eba..a5280277344 100644
--- a/test/README
+++ b/test/README
@@ -37,13 +37,13 @@ If using Eclipse, select the test and click on menu "Run external tools and choo
 Note that xdebug must be installed for this feature to work.
 
 * Generate a report of Unit tests code coverage among all Dolibarr classes:
-Increase your PHP memory (memory_limit in php.ini) to 512MB.
+Increase your PHP memory (memory_limit and suhosin.memory_limit in php.ini) to 4G.
 > cd test
-> phpunit -d memory_limit=-1 -d max_input_time=0 -d max_execution_time=0 --configuration ./phpunit/phpunittest.xml --coverage-html ./report --coverage-clover ./report/logs/phpunit.coverage.xml --log-junit ./report/logs/phpunit.xml phpunit/AllTests.php
+> phpunit -d suhosin.memory_limit=4G -d memory_limit=-1 -d max_input_time=0 -d max_execution_time=0 --configuration ./phpunit/phpunittest.xml --coverage-html ./report --coverage-clover ./report/logs/phpunit.coverage.xml --log-junit ./report/logs/phpunit.xml phpunit/AllTests.php
 
 If there is a timeout before end, try this: 
 > cd test
-> php -d memory_limit=-1 -d max_input_time=0 -d max_execution_time=0 /usr/bin/phpunit -d memory_limit=-1 -d max_input_time=0 -d max_execution_time=0 --configuration ./phpunit/phpunittest.xml --coverage-html ./report phpunit/AllTests.php
+> php -d suhosin.memory_limit=4G -d memory_limit=-1 -d max_input_time=0 -d max_execution_time=0 /usr/bin/phpunit -d suhosin.memory_limit=4G -d memory_limit=-1 -d max_input_time=0 -d max_execution_time=0 --configuration ./phpunit/phpunittest.xml --coverage-html ./report phpunit/AllTests.php
 puis renice -10 du process php
 
 
diff --git a/test/phpunit/phpunittest.xml b/test/phpunit/phpunittest.xml
index 2fff5d2889b..8237367ebef 100644
--- a/test/phpunit/phpunittest.xml
+++ b/test/phpunit/phpunittest.xml
@@ -13,6 +13,8 @@
 	<php>
 		<ini name="max_execution_time" value="600"/>
 		<ini name="max_input_time" value="600"/>
+        <ini name="memory_limit" value="4G" />
+        <!-- Also don't forget to change suhosin.memory_limit=4G -->
 	</php>
 	<filter>
 	  <blacklist>