# Tests using JCEF on ubuntu Jenkins are failing

**URL:** <https://platform.jetbrains.com/t/tests-using-jcef-on-ubuntu-jenkins-are-failing/2977>\
**Category:** IntelliJ Platform\
**Created:** [October 24, 2025, 3:04pm UTC](https://platform.jetbrains.com/t/tests-using-jcef-on-ubuntu-jenkins-are-failing/2977 "2025-10-24T15:04:19Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Vaisakh\_T](https://sea1.discourse-cdn.com/flex001/user_avatar/platform.jetbrains.com/vaisakh_t/32/2095_2.png) [@Vaisakh\_T](https://platform.jetbrains.com/u/Vaisakh_T)\
**Post date:** [October 24, 2025, 3:04pm UTC](https://platform.jetbrains.com/t/tests-using-jcef-on-ubuntu-jenkins-are-failing/2977/1 "2025-10-24T15:04:19Z")

</div>

We started implementing UI test automation on **ubuntu** using IntelliJ Remote Robot in Jenkins pipelines, leveraging the `JBCEFFixture` class to access webview elements. However, the webview is not rendering during automation and showing just a blank page. Below are some of the error logs I observed in idea.log and `runIdeForUiTests` command logs.

`com.intellij.platform.workspace.jps.entities.LibraryEntity to files`  
`2025-10-24 14:21:30,357 [125322] SEVERE - #c.i.u.j.StartupTest - Startup JCEF test is failed (because CefApp wasn’t initialized). JCEF will be restarted with verbose logging.`  
`java.lang.Throwable: Startup JCEF test is failed (because CefApp wasn’t initialized). JCEF will be restarted with verbose logging.`  
`at com.intellij.openapi.diagnostic.Logger.error(Logger.java:375)`  
`at com.intellij.ui.jcef.StartupTest$1.run(StartupTest.java:166)`  
`at com.intellij.openapi.application.impl.ApplicationImpl$4.run(ApplicationImpl.java:326)`  
`at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)`  
`at com.intellij.util.concurrency.ContextCallable.lambda$call$1(ContextCallable.java:86)`  
`at com.intellij.util.concurrency.ContextCallable.call(ContextCallable.java:95)`  
`at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)`  
`at com.intellij.util.concurrency.ChildContext$runInChildContext$1.invoke(propagation.kt:167)`  
`at com.intellij.util.concurrency.ChildContext$runInChildContext$1.invoke(propagation.kt:167)`  
`at com.intellij.util.concurrency.ChildContext.runInChildContext(propagation.kt:173)`  
`at com.intellij.util.concurrency.ChildContext.runInChildContext(propagation.kt:167)`  
`at com.intellij.util.concurrency.ContextRunnable.run(ContextRunnable.java:27)`  
`at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)`  
`at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)`  
`at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:735)`  
`at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:732)`  
`at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)`  
`at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:732)`  
`at java.base/java.lang.Thread.run(Thread.java:1583)`  
`2025-10-24 14:21:30,358 [125323] SEVERE - #c.i.u.j.StartupTest - IntelliJ IDEA 2025.2.4 Build #IC-252.27397.103`  
`2025-10-24 14:21:30,358 [125323] SEVERE - #c.i.u.j.StartupTest - JDK: 21.0.8; VM: OpenJDK 64-Bit Server VM; Vendor: JetBrains s.r.o.`  
`2025-10-24 14:21:30,358 [125323] SEVERE - #c.i.u.j.StartupTest - OS: Linux`  
`2025-10-24 14:21:30,358 [125323] SEVERE - #c.i.u.j.StartupTest - Last Action: CloseProject`  
`2025-10-24 14:21:30,365 [125330] INFO - STDOUT - Reinitialize CefLog.`  
`2025-10-24 14:21:30,365 [125330] INFO - STDOUT -`  
`2025-10-24 14:21:30,365 [125330] INFO - STDOUT - JCEF(21:30:365): initialized file logger, severity=LOGSEVERITY_VERBOSE, path=‘/home/ci/Build/workspace/amadtIntelliJBuilder/amadt_intellij/build/idea-sandbox/IC-2025.2.4/log_runIdeForUiTests/jcef_13076_i0.log’`  
`2025-10-24 14:21:30,380 [125345] INFO - #c.i.u.j.JBCefApp - JCEF has been restarted with verbose logging, with new cache_path ‘/tmp/jcef_cache_13076_i0’, with log_file ‘/home/ci/Build/workspace/amadtIntelliJBuilder/amadt_intellij/build/idea-sandbox/IC-2025.2.4/log_runIdeForUiTests/jcef_13076_i0.log’`

I have no issues running the tests locally on physical machines with **Windows** , **macOS** , and **Linux**.  
For reference, the `runIdeForUiTests` task is configured with the following JVM options:

`val runIdeForUiTests by intellijPlatformTesting.runIde.registering {`  
` version = providers.gradleProperty("platformVersion")`  
` type = IntelliJPlatformType.IntellijIdeaCommunity`  
` task {`  
` jvmArgumentProviders += CommandLineArgumentProvider {`  
` listOf(`  
` "-Drobot-server.port=8082",`  
` "-Djb.privacy.policy.text=<!--999.999-->",`  
` "-Djb.consents.confirmation.enabled=false",`  
` "-Didea.trust.all.projects=true",`  
` "-Dide.show.tips.on.startup.default.value=false",`  
` "-DjbScreenMenuBar.enabled=false",`  
` "-Dapple.laf.useScreenMenuBar=false",`  
` "-Dide.browser.jcef.jsQueryPoolSize=10000",`  
` "-Dide.mac.file.chooser.native=false",`  
` )`  
` }`  
` }`

` plugins {`  
` robotServerPlugin(remoteRobotVersion)`  
` }`  
`}`

We are using Remote Robot version 0.11.22 and running the tests on IntelliJ version 2025.2.4