diff --git a/idea/idea-gradle/src/org/jetbrains/kotlin/idea/run/KotlinGradleTestRunConfigurationProducer.kt b/idea/idea-gradle/src/org/jetbrains/kotlin/idea/run/KotlinGradleTestRunConfigurationProducer.kt
index 25000556def..deac0795cc7 100644
--- a/idea/idea-gradle/src/org/jetbrains/kotlin/idea/run/KotlinGradleTestRunConfigurationProducer.kt
+++ b/idea/idea-gradle/src/org/jetbrains/kotlin/idea/run/KotlinGradleTestRunConfigurationProducer.kt
@@ -90,7 +90,7 @@ class KotlinTestClassGradleConfigurationProducer : TestClassGradleConfigurationP
         configuration.settings.externalProjectPath = projectPath
         configuration.settings.taskNames = tasksToRun
         configuration.settings.scriptParameters = String.format("--tests \"%s\"", testClass.qualifiedName)
-        configuration.name = testClass.name
+        configuration.name = testClass.name ?: "unknown"
 
         JavaRunConfigurationExtensionManagerUtil.getInstance().extendCreatedConfiguration(configuration, contextLocation)
         return true