# Ensure formatter compatibility

Diffblue Cover IntelliJ Plugin uses google-java-format to format your test suite. 

Cover will recognise (E166) and require you to set up your IntelliJ VM with the following options to ensure formatter can run. 

Please follow the steps at:

{% embed url="<https://www.jetbrains.com/help/idea/tuning-the-ide.html#configure-jvm-options>" %}

and add the following options, then restart your IntelliJ IDE for them to take effect.

```
--add-exports jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED
--add-exports jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED
--add-exports jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED
--add-exports jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED
--add-exports jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED
--add-exports jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED
```


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