diff --git a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/api/ITestSourceDirectoryContributor.kt b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/api/ITestSourceDirectoryContributor.kt
index 60b18011..646d9dd2 100644
--- a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/api/ITestSourceDirectoryContributor.kt
+++ b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/api/ITestSourceDirectoryContributor.kt
@@ -3,7 +3,7 @@ package com.beust.kobalt.api
 import java.io.File
 
 /**
- * Plug-ins that add tets source directories to be compiled need to implement this interface.
+ * Plug-ins that add test source directories to be compiled need to implement this interface.
  */
 interface ITestSourceDirectoryContributor : IContributor {
     fun testSourceDirectoriesFor(project: Project, context: KobaltContext): List<File>