ExceptionInInitializerError while running tests with 203 EAP

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ExceptionInInitializerError occurs when I try to launch tests with integration of Rust and Toml plugins with the latest 203.5600-EAP-CANDIDATE-SNAPSHOT dependency.

I tried to run tests both with 0.6.2 and 0.7.0-SNAPSHOT version of gradle-intellij-plugin.
See CargoCrateDocLineMarkerProviderTest in intellij-rust/intellij-rust@e35fce6 to reproduce it

Looks like this issue is related to changes made in 8391855

Exception

java.lang.ExceptionInInitializerError
	at org.toml.lang.psi.TomlCompositeType.<init>(ElementTypes.kt:19)
	at org.toml.lang.psi.TomlElementTypes.<clinit>(TomlElementTypes.java:8)
	at org.rust.toml.CargoCrateDocLineMarkerProvider.collectSlowLineMarkers(CargoCrateDocLineMarkerProvider.kt:40)
	at com.intellij.codeInsight.daemon.impl.LineMarkersPass.queryProviders(LineMarkersPass.java:182)
	at com.intellij.codeInsight.daemon.impl.LineMarkersPass.lambda$doCollectInformation$3(LineMarkersPass.java:83)
	at com.intellij.codeInsight.daemon.impl.Divider.divideInsideAndOutsideInOneRoot(Divider.java:81)
	at com.intellij.codeInsight.daemon.impl.LineMarkersPass.doCollectInformation(LineMarkersPass.java:78)
	at com.intellij.codeHighlighting.TextEditorHighlightingPass.collectInformation(TextEditorHighlightingPass.java:56)
	at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.lambda$doRun$1(PassExecutorService.java:400)
	at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1137)
	at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.lambda$doRun$2(PassExecutorService.java:393)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:658)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:610)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:65)
	at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.doRun(PassExecutorService.java:392)
	at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.lambda$run$0(PassExecutorService.java:368)
	at com.intellij.openapi.application.impl.ReadMostlyRWLock.executeByImpatientReader(ReadMostlyRWLock.java:172)
	at com.intellij.openapi.application.impl.ApplicationImpl.executeByImpatientReader(ApplicationImpl.java:183)
	at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.run(PassExecutorService.java:366)
	at com.intellij.concurrency.JobLauncherImpl$VoidForkJoinTask$1.exec(JobLauncherImpl.java:188)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)
Caused by: com.intellij.diagnostic.ImplementationConflictException: Language with ID 'TOML' is already registered: class org.toml.lang.TomlLanguage
	at com.intellij.lang.Language.<init>(Language.java:84)
	at com.intellij.lang.Language.<init>(Language.java:60)
	at org.toml.lang.TomlLanguage.<init>(TomlLanguage.kt:10)
	at org.toml.lang.TomlLanguage.<clinit>(TomlLanguage.kt:10)
	... 25 more