diff --git a/src/main/kotlin/com/beust/kobalt/internal/GenericRunner.kt b/src/main/kotlin/com/beust/kobalt/internal/GenericRunner.kt
index 8a5a8616..f6b44b14 100644
--- a/src/main/kotlin/com/beust/kobalt/internal/GenericRunner.kt
+++ b/src/main/kotlin/com/beust/kobalt/internal/GenericRunner.kt
@@ -12,6 +12,10 @@ import com.beust.kobalt.misc.log
 import java.io.File
 import java.net.URLClassLoader
 
+/**
+ * Base class for testing frameworks that are invoked from a main class with arguments. Test runners can
+ * subclass this class and override mainClass and args.
+ */
 abstract class GenericTestRunner : ITestRunnerContributor {
     abstract val mainClass: String
     abstract fun args(project: Project, classpath: List<IClasspathDependency>) : List<String>
diff --git a/src/main/kotlin/com/beust/kobalt/internal/SpekRunner.kt b/src/main/kotlin/com/beust/kobalt/internal/SpekRunner.kt
index 923938f2..b3feaf69 100644
--- a/src/main/kotlin/com/beust/kobalt/internal/SpekRunner.kt
+++ b/src/main/kotlin/com/beust/kobalt/internal/SpekRunner.kt
@@ -1,5 +1,9 @@
 package com.beust.kobalt.internal
 
+/**
+ * SpekRunner triggers if it finds a dependency on org.jetbrains.spek but other than that, it just
+ * uses the regular JUnitRunner.
+ */
 public class SpekRunner() : JUnitRunner() {
     override val dependencyName = "org.jetbrains.spek"
 }