diff --git a/buildSrc/src/main/groovy/org/jetbrains/kotlin/KonanTest.groovy b/buildSrc/src/main/groovy/org/jetbrains/kotlin/KonanTest.groovy
index ace54790b9c..9d540c07dd1 100644
--- a/buildSrc/src/main/groovy/org/jetbrains/kotlin/KonanTest.groovy
+++ b/buildSrc/src/main/groovy/org/jetbrains/kotlin/KonanTest.groovy
@@ -316,7 +316,8 @@ import kotlin.test.TestFailedException
 
 fun main(args : Array<String>) {
   try { 
-    print(${pkg}box())
+    @Suppress("USELESS_ELVIS")
+    print(${pkg}box()?:"null")
   } catch (e:TestFailedException) {
     print("FAIL")
   }