diff --git a/js/js.tests/test/org/jetbrains/kotlin/js/test/BasicIrBoxTest.kt b/js/js.tests/test/org/jetbrains/kotlin/js/test/BasicIrBoxTest.kt
index 80a2efd6d6e..15fa6c1d62a 100644
--- a/js/js.tests/test/org/jetbrains/kotlin/js/test/BasicIrBoxTest.kt
+++ b/js/js.tests/test/org/jetbrains/kotlin/js/test/BasicIrBoxTest.kt
@@ -62,7 +62,7 @@ abstract class BasicIrBoxTest(
 
     private val lowerPerModule: Boolean = runIcMode || getBoolean("kotlin.js.ir.lowerPerModule")
 
-    private val klibMainModule: Boolean = false || getBoolean("kotlin.js.ir.klibMainModule")
+    private val klibMainModule: Boolean = getBoolean("kotlin.js.ir.klibMainModule")
 
     override val skipRegularMode: Boolean = getBoolean("kotlin.js.ir.skipRegularMode")
 
@@ -123,7 +123,7 @@ abstract class BasicIrBoxTest(
             compilationCache[it] ?: error("Can't find compiled module for dependency $it")
         }).map { File(it).absolutePath }.toMutableList()
 
-        val klibPath = outputFile.absolutePath.replace("_v5.js", "/")
+        val klibPath = outputFile.absolutePath.replace("_v5.js", "")
 
         prepareRuntimePirCaches(config, icCache)