Serialization of 'SimpleXMLElement' is not allowed' on OpenSuse 12.1

gistfile1.txt

opensuse-121-x64:~/wsdl2phpgenerator(php-vcr-test-fixtures)]$ phpunit
PHPUnit 3.7.29 by Sebastian Bergmann.

Configuration read from /home/vagrant/wsdl2phpgenerator/phpunit.xml.dist

........................EEEEE

Time: 11.49 seconds, Memory: 11.75Mb

There were 5 errors:

1) Wsdl2PhpGenerator\Tests\Functional\AmazonEc2Test::testNonStandardNamespace
PHPUnit_Framework_Exception: PHP Fatal error:  Uncaught exception 'Exception' with message 'Serialization of 'SimpleXMLElement' is not allowed' in -:49
Stack trace:
#0 -(49): serialize(Array)
#1 -(195): __phpunit_run_isolated_test()
#2 {main}
  thrown in - on line 49

Fatal error: Uncaught exception 'Exception' with message 'Serialization of 'SimpleXMLElement' is not allowed' in - on line 49

Exception: Serialization of 'SimpleXMLElement' is not allowed in - on line 49

Call Stack:
    0.0016     738296   1. {main}() -:0
    0.0542    5314992   2. __phpunit_run_isolated_test() -:195
    0.2437   10282960   3. serialize() -:49


2) Wsdl2PhpGenerator\Tests\Functional\CurrencyConverterTest::testCurrencyConvertor
PHPUnit_Framework_Exception: PHP Fatal error:  Uncaught exception 'Exception' with message 'Serialization of 'SimpleXMLElement' is not allowed' in -:49
Stack trace:
#0 -(49): serialize(Array)
#1 -(195): __phpunit_run_isolated_test()
#2 {main}
  thrown in - on line 49

Fatal error: Uncaught exception 'Exception' with message 'Serialization of 'SimpleXMLElement' is not allowed' in - on line 49

Exception: Serialization of 'SimpleXMLElement' is not allowed in - on line 49

Call Stack:
    0.0017     738328   1. {main}() -:0
    0.0582    5315200   2. __phpunit_run_isolated_test() -:195
    0.2006    8612264   3. serialize() -:49


3) Wsdl2PhpGenerator\Tests\Functional\MsSequelServerNativeWebServicesTest::testEnumConstants
PHPUnit_Framework_Exception: PHP Fatal error:  Uncaught exception 'Exception' with message 'Serialization of 'SimpleXMLElement' is not allowed' in -:49
Stack trace:
#0 -(49): serialize(Array)
#1 -(195): __phpunit_run_isolated_test()
#2 {main}
  thrown in - on line 49

Fatal error: Uncaught exception 'Exception' with message 'Serialization of 'SimpleXMLElement' is not allowed' in - on line 49

Exception: Serialization of 'SimpleXMLElement' is not allowed in - on line 49

Call Stack:
    0.0011     738352   1. {main}() -:0
    0.0578    5315200   2. __phpunit_run_isolated_test() -:195
    0.2008    8661368   3. serialize() -:49


4) Wsdl2PhpGenerator\Tests\Functional\NaicsTest::testNaics
PHPUnit_Framework_Exception: PHP Fatal error:  Uncaught exception 'Exception' with message 'Serialization of 'SimpleXMLElement' is not allowed' in -:49
Stack trace:
#0 -(49): serialize(Array)
#1 -(195): __phpunit_run_isolated_test()
#2 {main}
  thrown in - on line 49

Fatal error: Uncaught exception 'Exception' with message 'Serialization of 'SimpleXMLElement' is not allowed' in - on line 49

Exception: Serialization of 'SimpleXMLElement' is not allowed in - on line 49

Call Stack:
    0.0020     738256   1. {main}() -:0
    0.0570    5315048   2. __phpunit_run_isolated_test() -:195
    0.2006    8599696   3. serialize() -:49


5) Wsdl2PhpGenerator\Tests\Functional\PayPalSvcTest::testRelativeImportPaths
PHPUnit_Framework_Exception: PHP Fatal error:  Uncaught exception 'Exception' with message 'Serialization of 'SimpleXMLElement' is not allowed' in -:49
Stack trace:
#0 -(49): serialize(Array)
#1 -(195): __phpunit_run_isolated_test()
#2 {main}
  thrown in - on line 49

Fatal error: Uncaught exception 'Exception' with message 'Serialization of 'SimpleXMLElement' is not allowed' in - on line 49

Exception: Serialization of 'SimpleXMLElement' is not allowed in - on line 49

Call Stack:
    0.0026     738288   1. {main}() -:0
    0.0648    5315048   2. __phpunit_run_isolated_test() -:195
    0.2717   10232888   3. serialize() -:49


FAILURES!
Tests: 29, Assertions: 87, Errors: 5.

Generating code coverage report in Clover XML format ... done