Here are the known limitations of Parasoft Jtest:

• Creating unit tests with Unit Test Assistant for large projects may require a lot of memory. If the selected file scope is too large, the memory consumption may exceed the limit of memory allocated to Eclipse.

• Running static analysis may require additional memory allocation.
• Test Impact Analysis for JUnit 5 requires additional dependencies, including JUnit 4. This limitation is caused by a known issue in the JUnit 5 framework where test suites must be executed by a different test engine that requires dependencies that may not be configured within the project (see https://github.com/junit-team/junit5/issues/744). This means that Test Impact Analysis, which depends on test suites for collecting test cases affected by code changes, is unable to re-run affected JUnit 5 tests if the required dependencies are missing. As a workaround, Jtest automatically updates your project with a container that includes additional dependencies when affected tests cases are re-run.
• IntelliJ 2019.2 may fail to import the example Jtest projects from Gradle external model. This issue has been fixed in IntelliJ 2019.3.