NoClassDefFoundError when hudson runs a maven project

NoClassDefFoundError when hudson runs a maven project

I have a project for running tests. It's a maven project which uses
Selenium. It runs correctly when launched locally, but from the Hudson
platform, it throws NoClassDefFoundError:
Parsing POMs
[elsevier-selenium] $ "C:\Program Files\Java\jdk1.7.0_25/bin/java"
-Xmx1024m -cp
E:\hudson\plugins\maven-plugin\WEB-INF\lib\maven-agent-1.353.jar;E:\maven\boot\classworlds-1.1.jar
hudson.maven.agent.Main E:\maven
E:\hudson\war\WEB-INF\lib\remoting-1.353.jar
E:\hudson\plugins\maven-plugin\WEB-INF\lib\maven-interceptor-1.353.jar
1753
E:\hudson\plugins\maven-plugin\WEB-INF\lib\maven2.1-interceptor-1.2.jar
<===[HUDSON REMOTING CAPACITY]===>channel started
Executing Maven: -B -f
E:\hudson\jobs\tests-selenium\workspace\elsevier-selenium\pom.xml
integration-test
[INFO] Scanning for projects...
[INFO]
------------------------------------------------------------------------
[INFO] Building selenium-elsevier
[INFO] task-segment: [integration-test]
[INFO]
------------------------------------------------------------------------
[INFO] [compiler:testCompile {execution: default}]
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 5 source files to
E:\hudson\jobs\tests-selenium\workspace\elsevier-selenium\target\test-classes
[INFO] [site:attach-descriptor {execution: default-attach-descriptor}]
[INFO] [failsafe:integration-test {execution: default}]
[INFO] Failsafe report directory:
E:\hudson\jobs\tests-selenium\workspace\elsevier-selenium\target\failsafe-reports
-------------------------------------------------------
T E S T S
-------------------------------------------------------
-------------------------------------------------------
T E S T S
-------------------------------------------------------
Running fr.elsevier.tests.disponibilite.SearchTest
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.203 sec
<<< FAILURE!
fr.elsevier.tests.disponibilite.SearchTest Time elapsed: 0.203 sec <<<
ERROR!
java.lang.NoClassDefFoundError: Could not initialize class
fr.elsevier.tests.BaseSelenium
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:190)
at
org.apache.maven.surefire.report.SmartStackTraceParser.getClass(SmartStackTraceParser.java:63)
at
org.apache.maven.surefire.report.SmartStackTraceParser.<init>(SmartStackTraceParser.java:53)
at
org.apache.maven.surefire.common.junit4.JUnit4StackTraceWriter.smartTrimmedStackTrace(JUnit4StackTraceWriter.java:72)
[...]
at
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:124)
SearchTest extends BaseSelenium.
Which means it cannot even find a class in my source folder. The project
structure is like this:
src/
fr.elsevier.tests/
disponibilite/
SearchTest.java
BaseSelenium.java
pom.xml
Why does the build generates these NoClassDefFoundErrors and how to fix it?