NoClassDefFoundError for PreconditionViolationException when running JUnit5 tests

I can no longer run unit tests for my spring app within VSCode IDE, am only getting the following error when trying to do so:

java.lang.NoClassDefFoundError: org/junit/platform/commons/PreconditionViolationException
	at org.eclipse.jdt.internal.junit5.runner.JUnit5TestLoader.createTest(JUnit5TestLoader.java:90)
	at org.eclipse.jdt.internal.junit5.runner.JUnit5TestLoader.loadTests(JUnit5TestLoader.java:48)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:526)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:770)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:464)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210)
Caused by: java.lang.ClassNotFoundException: org.junit.platform.commons.PreconditionViolationException
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)

PreconditionViolationException is now deprecated, see here, so it would seem Java Test Runner is not aware of it or what. Currently my build.gradle has junit dependencies like this:

        testImplementation "org.junit.jupiter:junit-jupiter-api:5.6.0"
        testImplementation "org.junit.jupiter:junit-jupiter-params:5.6.0"
        testImplementation "org.springframework.boot:spring-boot-starter-test:2.2.8.RELEASE"
        testRuntime "org.junit.jupiter:junit-jupiter-engine:5.6.0"

I had a look at what seemed like a related issue but none of the workarounds from there worked for me.

Start by reproducing the failure from VSCode's JUnit5 runner with the Gradle dependencies shown in build.gradle, focusing on the missing org.junit.platform.commons.PreconditionViolationException from the stack trace. Done means the Spring application's JUnit5 tests run in VSCode without the NoClassDefFoundError; the issue does not name a repository file or test to modify.