diff --git a/topics/basics/testing_plugins/testing_faq.md b/topics/basics/testing_plugins/testing_faq.md
index b19cebae2..e9f4ab2b1 100644
--- a/topics/basics/testing_plugins/testing_faq.md
+++ b/topics/basics/testing_plugins/testing_faq.md
@@ -61,9 +61,34 @@ In such cases, simply delete test-system/caches in your [sandbox di
### How to enable DEBUG/TRACE logging?
-Provide JVM system properties (Gradle: via `systemProperty` for `test` task) `idea.log.debug.categories` or `idea.log.trace.categories`, respectively.
+Provide JVM system properties `idea.log.debug.categories` or `idea.log.trace.categories` to specify logger category name, respectively.
Multiple categories can be set using a comma separated value list.
+**Sample** Set DEBUG level for categories `com.my.plugin.ui` and `com.my.plugin.backend`:
+
+
+
+
+```kotlin
+tasks {
+ test {
+ systemProperty("idea.log.debug.categories", "com.my.plugin.ui,com.my.plugin.backend")
+ }
+}
+```
+
+
+
+
+```groovy
+test {
+ systemProperty("idea.log.debug.categories", "com.my.plugin.ui,com.my.plugin.backend")
+}
+```
+
+
+
+
### How to get separate logs for failing tests?
Set system property `idea.split.test.logs` to `true` to generate separate test log files in splitTestLogs subdirectory for failing tests (WARN/ERROR level messages) (2021.3).