diff --git a/compiler/incremental-compilation-impl/test/org/jetbrains/kotlin/incremental/AbstractIncrementalK1JsKlibCompilerRunnerTest.kt b/compiler/incremental-compilation-impl/test/org/jetbrains/kotlin/incremental/AbstractIncrementalK1JsKlibCompilerRunnerTest.kt
index 14bfc76eee6..8908ef9ca85 100644
--- a/compiler/incremental-compilation-impl/test/org/jetbrains/kotlin/incremental/AbstractIncrementalK1JsKlibCompilerRunnerTest.kt
+++ b/compiler/incremental-compilation-impl/test/org/jetbrains/kotlin/incremental/AbstractIncrementalK1JsKlibCompilerRunnerTest.kt
@@ -15,6 +15,7 @@ abstract class AbstractIncrementalK1JsKlibCompilerRunnerTest : AbstractIncrement
             irProduceKlibDir = false
             irProduceKlibFile = true
             irOnly = true
+            languageVersion = "1.9"
         }
 
     override val buildLogFinder: BuildLogFinder
diff --git a/compiler/incremental-compilation-impl/test/org/jetbrains/kotlin/incremental/AbstractIncrementalK1JsKlibMultiModuleCompilerRunnerTest.kt b/compiler/incremental-compilation-impl/test/org/jetbrains/kotlin/incremental/AbstractIncrementalK1JsKlibMultiModuleCompilerRunnerTest.kt
index ce40618ba2e..fd038e01da8 100644
--- a/compiler/incremental-compilation-impl/test/org/jetbrains/kotlin/incremental/AbstractIncrementalK1JsKlibMultiModuleCompilerRunnerTest.kt
+++ b/compiler/incremental-compilation-impl/test/org/jetbrains/kotlin/incremental/AbstractIncrementalK1JsKlibMultiModuleCompilerRunnerTest.kt
@@ -25,6 +25,7 @@ abstract class AbstractIncrementalK1JsKlibMultiModuleCompilerRunnerTest :
             irProduceKlibDir = false
             irProduceKlibFile = true
             irOnly = true
+            languageVersion = "1.9"
         }
 
     override val buildLogFinder: BuildLogFinder