diff --git a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/api/ITestJvmFlagContributor.kt b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/api/ITestJvmFlagContributor.kt
index 79e369ff..6f1c0bfb 100644
--- a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/api/ITestJvmFlagContributor.kt
+++ b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/api/ITestJvmFlagContributor.kt
@@ -4,5 +4,9 @@ package com.beust.kobalt.api
  * Plug-ins that add flags to the JVM used to run tests should implement this interface.
  */
 interface ITestJvmFlagContributor : IContributor {
+    /**
+     * The list of JVM flags that will be added to the JVM when the tests get run. @param[currentFlags] is only here
+     * for convenience, in case you need to look at the current JVM flags before adding your own flags.
+     */
     fun testJvmFlagsFor(project: Project, context: KobaltContext, currentFlags: List<String>) : List<String>
 }