How to fix org.testng.TestNGException: Cannot find class [ Updated 2024 ]

Table of Contents

How to fix org.testng.TestNGException

Let’s learn how to fix org.testng.TestNGException: Cannot find a class in the classpath in this post. All the test classes are complied with before they are run. This error indicates that the TestNG does not find the .class file to run the test class.

Sample Error Trace

The error has the following stack trace :

org.testng.TestNGException: 
Cannot find class in classpath: com.testingdocs.testng.tutorials
.TestNGAnnotationExecutionOrder
 at org.testng.xml.XmlClass.loadClass(XmlClass.java:75)
 at org.testng.xml.XmlClass.init(XmlClass.java:67)
 at org.testng.xml.XmlClass.(XmlClass.java:54)
 at org.testng.xml.TestNGContentHandler.
startElement(TestNGContentHandler.java:556)
 at java.xml/com.sun.org.apache.xerces.internal
.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:518)
 at java.xml/com.sun.org.apache.xerces.internal
.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java:731)
 at java.xml/com.sun.org.apache.xerces.internal
.impl.XMLDocumentFragmentScannerImpl
.scanStartElement(XMLDocumentFragmentScannerImpl.java:1406)
 at java.xml/com.sun.org.apache.xerces.internal
.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver
.next(XMLDocumentFragmentScannerImpl.java:2725)
 at java.xml/com.sun.org.apache.xerces.internal
.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:605)
 at java.xml/com.sun.org.apache.xerces.internal
.impl.XMLDocumentFragmentScannerImpl
.scanDocument(XMLDocumentFragmentScannerImpl.java:541)
 at java.xml/com.sun.org.apache.xerces.internal
.parsers.XML11Configuration.parse(XML11Configuration.java:888)
 at java.xml/com.sun.org.apache.xerces.internal
.parsers.XML11Configuration.parse(XML11Configuration.java:824)
 at java.xml/com.sun.org.apache.xerces.internal
.parsers.XMLParser.parse(XMLParser.java:141)
 at java.xml/com.sun.org.apache.xerces.internal
.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1224)
 at java.xml/com.sun.org.apache.xerces.internal
.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:635)
 at java.xml/com.sun.org.apache.xerces.internal
.jaxp.SAXParserImpl.parse(SAXParserImpl.java:324)
 at java.xml/javax.xml.parsers.SAXParser.parse(SAXParser.java:197)
 at org.testng.xml.XMLParser.parse(XMLParser.java:39)
 at org.testng.xml.SuiteXmlParser.parse(SuiteXmlParser.java:16)
 at org.testng.xml.SuiteXmlParser.parse(SuiteXmlParser.java:9)
 at org.testng.xml.Parser.parse(Parser.java:162)
 at org.testng.xml.Parser.parse(Parser.java:248)
 at org.testng.TestNG.parseSuite(TestNG.java:322)
 at org.testng.TestNG.initializeSuitesAndJarFile(TestNG.java:374)
 at org.testng.TestNG.initializeEverything(TestNG.java:1017)
 at org.testng.remote.support.RemoteTestNG6_12
.initialize(RemoteTestNG6_12.java:22)
 at org.testng.remote.AbstractRemoteTestNG
.run(AbstractRemoteTestNG.java:98)
 at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
 at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)

TestNGException Eclipse

Fix

By default, the test classes are generated under the target folder.

<project_home>/target/test-classes

The fix generally depends on the project setup environment, build tool, IDE used etc. If the project is based on Maven using Eclipse IDE, the fix is to clean and update the project.

Check the package names specified in the testng.xml files to the package names in the project. Any mismatch would result in this error. Correct the package names and build the project.

Example

For example, in the above screenshot the fully qualified Test class name in the project is:

com.testingdocs.sample.SkipExceptionExample.java

The error was raised because there was a typo in the class name specified in the testng.xml suite file.

The incorrect class name was:

com.testingdoc.sample.SkipExceptionExample.java

Correct the class name in the testing XML file and clean the project. Run Maven >> Update the project and run the test suite. This error would be resolved.

TestNG Error Fixed