diff --git a/backend.native/tests/testUtils.kt b/backend.native/tests/testUtils.kt
index 4fd5d74cc24..4c26a3c16e7 100644
--- a/backend.native/tests/testUtils.kt
+++ b/backend.native/tests/testUtils.kt
@@ -2,4 +2,4 @@ package kotlin.test
 
 class TestFailedException(val msg:String):RuntimeException(msg)
 
-fun <T> assertEquals(a:T, b:T, msg:String) { if (a != b) throw TestFailedException(msg) }
\ No newline at end of file
+fun <T> assertEquals(a:T, b:T, msg:String = "") { if (a != b) throw TestFailedException(msg) }
\ No newline at end of file