diff --git a/compiler/incremental-compilation-impl/test/org/jetbrains/kotlin/incremental/AbstractIncrementalJsCompilerRunnerTest.kt b/compiler/incremental-compilation-impl/test/org/jetbrains/kotlin/incremental/AbstractIncrementalJsCompilerRunnerTest.kt
index d11e7bbcc7a..3ec506ace70 100644
--- a/compiler/incremental-compilation-impl/test/org/jetbrains/kotlin/incremental/AbstractIncrementalJsCompilerRunnerTest.kt
+++ b/compiler/incremental-compilation-impl/test/org/jetbrains/kotlin/incremental/AbstractIncrementalJsCompilerRunnerTest.kt
@@ -44,6 +44,7 @@ abstract class AbstractIncrementalJsCompilerRunnerTest : AbstractIncrementalComp
             sourceMap = true
             metaInfo = true
             forceDeprecatedLegacyCompilerUsage = true
+            languageVersion = "1.9"
         }
 
     protected open val scopeExpansionMode = CompileScopeExpansionMode.NEVER