diff --git a/jps/jps-plugin/testData/general/AccessToInternalInProductionFromTests/kotlinProject.ipr b/jps/jps-plugin/testData/general/AccessToInternalInProductionFromTests/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/AccessToInternalInProductionFromTests/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/AccessToInternalInProductionFromTests/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/BuildAfterGdwBuild/kotlinProject.ipr b/jps/jps-plugin/testData/general/BuildAfterGdwBuild/kotlinProject.ipr
index c1a403dd047..63d6b862cf7 100644
--- a/jps/jps-plugin/testData/general/BuildAfterGdwBuild/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/BuildAfterGdwBuild/kotlinProject.ipr
@@ -22,7 +22,7 @@
       <module fileurl="file://$PROJECT_DIR$/module2/module2.iml" filepath="$PROJECT_DIR$/module2/module2.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
   <component name="VcsDirectoryMappings">
diff --git a/jps/jps-plugin/testData/general/CancelKotlinCompilation/kotlinProject.ipr b/jps/jps-plugin/testData/general/CancelKotlinCompilation/kotlinProject.ipr
index 8226e21ade3..485ba848fa6 100644
--- a/jps/jps-plugin/testData/general/CancelKotlinCompilation/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/CancelKotlinCompilation/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
diff --git a/jps/jps-plugin/testData/general/CheckIsCancelledIsCalledOftenEnough/kotlinProject.ipr b/jps/jps-plugin/testData/general/CheckIsCancelledIsCalledOftenEnough/kotlinProject.ipr
index 8226e21ade3..485ba848fa6 100644
--- a/jps/jps-plugin/testData/general/CheckIsCancelledIsCalledOftenEnough/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/CheckIsCancelledIsCalledOftenEnough/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
diff --git a/jps/jps-plugin/testData/general/CircularDependenciesDifferentPackages/kotlinProject.ipr b/jps/jps-plugin/testData/general/CircularDependenciesDifferentPackages/kotlinProject.ipr
index 03619a4f72c..5b737b17668 100644
--- a/jps/jps-plugin/testData/general/CircularDependenciesDifferentPackages/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/CircularDependenciesDifferentPackages/kotlinProject.ipr
@@ -22,7 +22,7 @@
       <module fileurl="file://$PROJECT_DIR$/module2/module2.iml" filepath="$PROJECT_DIR$/module2/module2.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
   <component name="VcsDirectoryMappings">
diff --git a/jps/jps-plugin/testData/general/CircularDependenciesInternalFromAnotherModule/kotlinProject.ipr b/jps/jps-plugin/testData/general/CircularDependenciesInternalFromAnotherModule/kotlinProject.ipr
index c1a403dd047..63d6b862cf7 100644
--- a/jps/jps-plugin/testData/general/CircularDependenciesInternalFromAnotherModule/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/CircularDependenciesInternalFromAnotherModule/kotlinProject.ipr
@@ -22,7 +22,7 @@
       <module fileurl="file://$PROJECT_DIR$/module2/module2.iml" filepath="$PROJECT_DIR$/module2/module2.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
   <component name="VcsDirectoryMappings">
diff --git a/jps/jps-plugin/testData/general/CircularDependenciesNoKotlinFiles/kotlinProject.ipr b/jps/jps-plugin/testData/general/CircularDependenciesNoKotlinFiles/kotlinProject.ipr
index 809737b0b76..1b38be1acfd 100644
--- a/jps/jps-plugin/testData/general/CircularDependenciesNoKotlinFiles/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/CircularDependenciesNoKotlinFiles/kotlinProject.ipr
@@ -9,7 +9,7 @@
       <module fileurl="file://$PROJECT_DIR$/module2/module2.iml" filepath="$PROJECT_DIR$/module2/module2.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
diff --git a/jps/jps-plugin/testData/general/CircularDependenciesSamePackage/kotlinProject.ipr b/jps/jps-plugin/testData/general/CircularDependenciesSamePackage/kotlinProject.ipr
index c1a403dd047..63d6b862cf7 100644
--- a/jps/jps-plugin/testData/general/CircularDependenciesSamePackage/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/CircularDependenciesSamePackage/kotlinProject.ipr
@@ -22,7 +22,7 @@
       <module fileurl="file://$PROJECT_DIR$/module2/module2.iml" filepath="$PROJECT_DIR$/module2/module2.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
   <component name="VcsDirectoryMappings">
diff --git a/jps/jps-plugin/testData/general/CircularDependenciesSamePackageWithTests/kotlinProject.ipr b/jps/jps-plugin/testData/general/CircularDependenciesSamePackageWithTests/kotlinProject.ipr
index c1a403dd047..63d6b862cf7 100644
--- a/jps/jps-plugin/testData/general/CircularDependenciesSamePackageWithTests/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/CircularDependenciesSamePackageWithTests/kotlinProject.ipr
@@ -22,7 +22,7 @@
       <module fileurl="file://$PROJECT_DIR$/module2/module2.iml" filepath="$PROJECT_DIR$/module2/module2.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
   <component name="VcsDirectoryMappings">
diff --git a/jps/jps-plugin/testData/general/CircularDependenciesWrongInternalFromTests/kotlinProject.ipr b/jps/jps-plugin/testData/general/CircularDependenciesWrongInternalFromTests/kotlinProject.ipr
index c1a403dd047..63d6b862cf7 100644
--- a/jps/jps-plugin/testData/general/CircularDependenciesWrongInternalFromTests/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/CircularDependenciesWrongInternalFromTests/kotlinProject.ipr
@@ -22,7 +22,7 @@
       <module fileurl="file://$PROJECT_DIR$/module2/module2.iml" filepath="$PROJECT_DIR$/module2/module2.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
   <component name="VcsDirectoryMappings">
diff --git a/jps/jps-plugin/testData/general/CircularDependencyWithReferenceToOldVersionLib/kotlinProject.ipr b/jps/jps-plugin/testData/general/CircularDependencyWithReferenceToOldVersionLib/kotlinProject.ipr
index c1a403dd047..63d6b862cf7 100644
--- a/jps/jps-plugin/testData/general/CircularDependencyWithReferenceToOldVersionLib/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/CircularDependencyWithReferenceToOldVersionLib/kotlinProject.ipr
@@ -22,7 +22,7 @@
       <module fileurl="file://$PROJECT_DIR$/module2/module2.iml" filepath="$PROJECT_DIR$/module2/module2.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
   <component name="VcsDirectoryMappings">
diff --git a/jps/jps-plugin/testData/general/CodeInKotlinPackage/kotlinProject.ipr b/jps/jps-plugin/testData/general/CodeInKotlinPackage/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/CodeInKotlinPackage/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/CodeInKotlinPackage/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/CustomDestination/kotlinProject.ipr b/jps/jps-plugin/testData/general/CustomDestination/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/CustomDestination/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/CustomDestination/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/DefaultLanguageVersionCustomApiVersion/kotlinProject.ipr b/jps/jps-plugin/testData/general/DefaultLanguageVersionCustomApiVersion/kotlinProject.ipr
index 001ea3380cd..bedcf682ec3 100644
--- a/jps/jps-plugin/testData/general/DefaultLanguageVersionCustomApiVersion/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/DefaultLanguageVersionCustomApiVersion/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
   <component name="KotlinCommonCompilerArguments">
diff --git a/jps/jps-plugin/testData/general/DependencyToOldKotlinLib/kotlinProject.ipr b/jps/jps-plugin/testData/general/DependencyToOldKotlinLib/kotlinProject.ipr
index d324e31411d..42e35b3f5a8 100644
--- a/jps/jps-plugin/testData/general/DependencyToOldKotlinLib/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/DependencyToOldKotlinLib/kotlinProject.ipr
@@ -21,7 +21,7 @@
       <module fileurl="file://$PROJECT_DIR$/module/module.iml" filepath="$PROJECT_DIR$/module/module.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
   <component name="VcsDirectoryMappings">
diff --git a/jps/jps-plugin/testData/general/DevKitProject/kotlinProject.ipr b/jps/jps-plugin/testData/general/DevKitProject/kotlinProject.ipr
index cacdb365adc..00c9f560bd6 100644
--- a/jps/jps-plugin/testData/general/DevKitProject/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/DevKitProject/kotlinProject.ipr
@@ -10,7 +10,7 @@
   </component>
   <component name="ProjectRootManager"
              version="2"
-             languageLevel="JDK_1_6"
+             languageLevel="JDK_1_8"
              default="true"
              project-jdk-name="IntelliJ IDEA"
              project-jdk-type="IDEA JDK" >
diff --git a/jps/jps-plugin/testData/general/DoNotCreateUselessKotlinIncrementalCaches/kotlinProject.ipr b/jps/jps-plugin/testData/general/DoNotCreateUselessKotlinIncrementalCaches/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/DoNotCreateUselessKotlinIncrementalCaches/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/DoNotCreateUselessKotlinIncrementalCaches/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/DoNotCreateUselessKotlinIncrementalCachesForDependentTargets/kotlinProject.ipr b/jps/jps-plugin/testData/general/DoNotCreateUselessKotlinIncrementalCachesForDependentTargets/kotlinProject.ipr
index 809737b0b76..1b38be1acfd 100644
--- a/jps/jps-plugin/testData/general/DoNotCreateUselessKotlinIncrementalCachesForDependentTargets/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/DoNotCreateUselessKotlinIncrementalCachesForDependentTargets/kotlinProject.ipr
@@ -9,7 +9,7 @@
       <module fileurl="file://$PROJECT_DIR$/module2/module2.iml" filepath="$PROJECT_DIR$/module2/module2.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
diff --git a/jps/jps-plugin/testData/general/EAPToReleaseIC/kotlinProject.ipr b/jps/jps-plugin/testData/general/EAPToReleaseIC/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/EAPToReleaseIC/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/EAPToReleaseIC/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/ExcludeFileUsingCompilerSettings/kotlinProject.ipr b/jps/jps-plugin/testData/general/ExcludeFileUsingCompilerSettings/kotlinProject.ipr
index da39ecb6ab2..c791ed83fb6 100644
--- a/jps/jps-plugin/testData/general/ExcludeFileUsingCompilerSettings/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/ExcludeFileUsingCompilerSettings/kotlinProject.ipr
@@ -12,7 +12,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/ExcludeFolderInSourceRoot/kotlinProject.ipr b/jps/jps-plugin/testData/general/ExcludeFolderInSourceRoot/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/ExcludeFolderInSourceRoot/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/ExcludeFolderInSourceRoot/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/ExcludeFolderNonRecursivelyUsingCompilerSettings/kotlinProject.ipr b/jps/jps-plugin/testData/general/ExcludeFolderNonRecursivelyUsingCompilerSettings/kotlinProject.ipr
index 852485b023c..b54aade11b4 100644
--- a/jps/jps-plugin/testData/general/ExcludeFolderNonRecursivelyUsingCompilerSettings/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/ExcludeFolderNonRecursivelyUsingCompilerSettings/kotlinProject.ipr
@@ -13,7 +13,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/ExcludeFolderRecursivelyUsingCompilerSettings/kotlinProject.ipr b/jps/jps-plugin/testData/general/ExcludeFolderRecursivelyUsingCompilerSettings/kotlinProject.ipr
index 9b497ed5475..83e090ff5b7 100644
--- a/jps/jps-plugin/testData/general/ExcludeFolderRecursivelyUsingCompilerSettings/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/ExcludeFolderRecursivelyUsingCompilerSettings/kotlinProject.ipr
@@ -11,7 +11,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/ExcludeModuleFolderInSourceRootOfAnotherModule/kotlinProject.ipr b/jps/jps-plugin/testData/general/ExcludeModuleFolderInSourceRootOfAnotherModule/kotlinProject.ipr
index 35b084995b6..52040d1407c 100644
--- a/jps/jps-plugin/testData/general/ExcludeModuleFolderInSourceRootOfAnotherModule/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/ExcludeModuleFolderInSourceRootOfAnotherModule/kotlinProject.ipr
@@ -9,7 +9,7 @@
       <module fileurl="file://$PROJECT_DIR$/src/module2/module2.iml" filepath="$PROJECT_DIR$/src/module2/module2.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/FileDoesNotExistWarning/kotlinProject.ipr b/jps/jps-plugin/testData/general/FileDoesNotExistWarning/kotlinProject.ipr
index 04d418ca179..d15b0cdde75 100644
--- a/jps/jps-plugin/testData/general/FileDoesNotExistWarning/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/FileDoesNotExistWarning/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/module.iml" filepath="$PROJECT_DIR$/module.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
diff --git a/jps/jps-plugin/testData/general/Help/kotlinProject.ipr b/jps/jps-plugin/testData/general/Help/kotlinProject.ipr
index 102bdf0ea20..79aaf6b6ce1 100644
--- a/jps/jps-plugin/testData/general/Help/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/Help/kotlinProject.ipr
@@ -11,7 +11,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/InternalFromAnotherModule/kotlinProject.ipr b/jps/jps-plugin/testData/general/InternalFromAnotherModule/kotlinProject.ipr
index c1a403dd047..63d6b862cf7 100644
--- a/jps/jps-plugin/testData/general/InternalFromAnotherModule/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/InternalFromAnotherModule/kotlinProject.ipr
@@ -22,7 +22,7 @@
       <module fileurl="file://$PROJECT_DIR$/module2/module2.iml" filepath="$PROJECT_DIR$/module2/module2.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
   <component name="VcsDirectoryMappings">
diff --git a/jps/jps-plugin/testData/general/InternalFromSpecialRelatedModule/kotlinProject.ipr b/jps/jps-plugin/testData/general/InternalFromSpecialRelatedModule/kotlinProject.ipr
index c1a403dd047..63d6b862cf7 100644
--- a/jps/jps-plugin/testData/general/InternalFromSpecialRelatedModule/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/InternalFromSpecialRelatedModule/kotlinProject.ipr
@@ -22,7 +22,7 @@
       <module fileurl="file://$PROJECT_DIR$/module2/module2.iml" filepath="$PROJECT_DIR$/module2/module2.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
   <component name="VcsDirectoryMappings">
diff --git a/jps/jps-plugin/testData/general/JKJInheritanceProject/kotlinProject.ipr b/jps/jps-plugin/testData/general/JKJInheritanceProject/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/JKJInheritanceProject/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/JKJInheritanceProject/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/JKJProject/kotlinProject.ipr b/jps/jps-plugin/testData/general/JKJProject/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/JKJProject/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/JKJProject/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/JpsDaemonIC/kotlinProject.ipr b/jps/jps-plugin/testData/general/JpsDaemonIC/kotlinProject.ipr
index 8226e21ade3..485ba848fa6 100644
--- a/jps/jps-plugin/testData/general/JpsDaemonIC/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/JpsDaemonIC/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
diff --git a/jps/jps-plugin/testData/general/Jre11/kotlinProject.ipr b/jps/jps-plugin/testData/general/Jre11/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/Jre11/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/Jre11/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KJCircularProject/kotlinProject.ipr b/jps/jps-plugin/testData/general/KJCircularProject/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/KJCircularProject/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KJCircularProject/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KJKInheritanceProject/kotlinProject.ipr b/jps/jps-plugin/testData/general/KJKInheritanceProject/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/KJKInheritanceProject/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KJKInheritanceProject/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KJKProject/kotlinProject.ipr b/jps/jps-plugin/testData/general/KJKProject/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/KJKProject/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KJKProject/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KotlinJavaProject/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinJavaProject/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/KotlinJavaProject/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinJavaProject/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KotlinJavaScriptChangePackage/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinJavaScriptChangePackage/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/KotlinJavaScriptChangePackage/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinJavaScriptChangePackage/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KotlinJavaScriptInternalFromSpecialRelatedModule/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinJavaScriptInternalFromSpecialRelatedModule/kotlinProject.ipr
index c1a403dd047..63d6b862cf7 100644
--- a/jps/jps-plugin/testData/general/KotlinJavaScriptInternalFromSpecialRelatedModule/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinJavaScriptInternalFromSpecialRelatedModule/kotlinProject.ipr
@@ -22,7 +22,7 @@
       <module fileurl="file://$PROJECT_DIR$/module2/module2.iml" filepath="$PROJECT_DIR$/module2/module2.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
   <component name="VcsDirectoryMappings">
diff --git a/jps/jps-plugin/testData/general/KotlinJavaScriptProject/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinJavaScriptProject/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/KotlinJavaScriptProject/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinJavaScriptProject/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithCustomOutputPaths/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithCustomOutputPaths/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithCustomOutputPaths/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithCustomOutputPaths/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithDirectoryAsLibrary/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithDirectoryAsLibrary/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithDirectoryAsLibrary/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithDirectoryAsLibrary/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithDirectoryAsStdlib/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithDirectoryAsStdlib/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithDirectoryAsStdlib/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithDirectoryAsStdlib/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithLibrary/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithLibrary/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithLibrary/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithLibrary/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithLibraryAndErrors/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithLibraryAndErrors/kotlinProject.ipr
index 12af7dde89a..b855442d5e2 100644
--- a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithLibraryAndErrors/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithLibraryAndErrors/kotlinProject.ipr
@@ -11,7 +11,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithLibraryCustomOutputDir/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithLibraryCustomOutputDir/kotlinProject.ipr
index 8fed56d0828..b9da135ebf3 100644
--- a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithLibraryCustomOutputDir/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithLibraryCustomOutputDir/kotlinProject.ipr
@@ -12,7 +12,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithLibraryNoCopy/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithLibraryNoCopy/kotlinProject.ipr
index 12af7dde89a..b855442d5e2 100644
--- a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithLibraryNoCopy/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithLibraryNoCopy/kotlinProject.ipr
@@ -11,7 +11,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithSourceMap/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithSourceMap/kotlinProject.ipr
index 16a88d84040..148b246d77c 100644
--- a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithSourceMap/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithSourceMap/kotlinProject.ipr
@@ -12,7 +12,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithSourceMapRelativePaths/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithSourceMapRelativePaths/kotlinProject.ipr
index 8ad5a239b86..059897d87c0 100644
--- a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithSourceMapRelativePaths/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithSourceMapRelativePaths/kotlinProject.ipr
@@ -11,7 +11,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithTwoModules/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithTwoModules/kotlinProject.ipr
index b02ca501ac3..0502eae4ea9 100644
--- a/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithTwoModules/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinJavaScriptProjectWithTwoModules/kotlinProject.ipr
@@ -9,7 +9,7 @@
       <module fileurl="file://$PROJECT_DIR$/module2/module2.iml" filepath="$PROJECT_DIR$/module2/module2.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KotlinLombokProjectBuild/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinLombokProjectBuild/kotlinProject.ipr
index 52e3d65e4fb..6a546e12943 100644
--- a/jps/jps-plugin/testData/general/KotlinLombokProjectBuild/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinLombokProjectBuild/kotlinProject.ipr
@@ -11,7 +11,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KotlinProject/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinProject/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/KotlinProject/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinProject/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KotlinProjectTwoFilesInOnePackage/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinProjectTwoFilesInOnePackage/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/KotlinProjectTwoFilesInOnePackage/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinProjectTwoFilesInOnePackage/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KotlinProjectWithEmptyOutputDirInSomeModules/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinProjectWithEmptyOutputDirInSomeModules/kotlinProject.ipr
index 7dc391eaceb..da6f68ab1b8 100644
--- a/jps/jps-plugin/testData/general/KotlinProjectWithEmptyOutputDirInSomeModules/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinProjectWithEmptyOutputDirInSomeModules/kotlinProject.ipr
@@ -9,7 +9,7 @@
       <module fileurl="file://$PROJECT_DIR$/test_module/test_module.iml" filepath="$PROJECT_DIR$/test_module/test_module.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
diff --git a/jps/jps-plugin/testData/general/KotlinProjectWithEmptyProductionOutputDir/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinProjectWithEmptyProductionOutputDir/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/KotlinProjectWithEmptyProductionOutputDir/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinProjectWithEmptyProductionOutputDir/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KotlinProjectWithEmptyProductionOutputDirWithoutSrcDir/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinProjectWithEmptyProductionOutputDirWithoutSrcDir/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/KotlinProjectWithEmptyProductionOutputDirWithoutSrcDir/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinProjectWithEmptyProductionOutputDirWithoutSrcDir/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/KotlinProjectWithEmptyTestOutputDir/kotlinProject.ipr b/jps/jps-plugin/testData/general/KotlinProjectWithEmptyTestOutputDir/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/KotlinProjectWithEmptyTestOutputDir/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/KotlinProjectWithEmptyTestOutputDir/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/LanguageOrApiVersionChanged/kotlinProject.ipr b/jps/jps-plugin/testData/general/LanguageOrApiVersionChanged/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/LanguageOrApiVersionChanged/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/LanguageOrApiVersionChanged/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/ManyFiles/kotlinProject.ipr b/jps/jps-plugin/testData/general/ManyFiles/kotlinProject.ipr
index 8226e21ade3..485ba848fa6 100644
--- a/jps/jps-plugin/testData/general/ManyFiles/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/ManyFiles/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
diff --git a/jps/jps-plugin/testData/general/ManyFilesForPackage/kotlinProject.ipr b/jps/jps-plugin/testData/general/ManyFilesForPackage/kotlinProject.ipr
index 8226e21ade3..485ba848fa6 100644
--- a/jps/jps-plugin/testData/general/ManyFilesForPackage/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/ManyFilesForPackage/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
diff --git a/jps/jps-plugin/testData/general/PureJavaProject/kotlinProject.ipr b/jps/jps-plugin/testData/general/PureJavaProject/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/PureJavaProject/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/PureJavaProject/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/ReexportedDependency/kotlinProject.ipr b/jps/jps-plugin/testData/general/ReexportedDependency/kotlinProject.ipr
index 79176c748e4..57b4d161f99 100644
--- a/jps/jps-plugin/testData/general/ReexportedDependency/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/ReexportedDependency/kotlinProject.ipr
@@ -10,7 +10,7 @@
       <module fileurl="file://$PROJECT_DIR$/module3/module3.iml" filepath="$PROJECT_DIR$/module3/module3.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
   <component name="libraryTable">
diff --git a/jps/jps-plugin/testData/general/RelocatableCaches/kotlinProject.ipr b/jps/jps-plugin/testData/general/RelocatableCaches/kotlinProject.ipr
index 8226e21ade3..485ba848fa6 100644
--- a/jps/jps-plugin/testData/general/RelocatableCaches/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/RelocatableCaches/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
diff --git a/jps/jps-plugin/testData/general/SourcePackagePrefix/kotlinProject.ipr b/jps/jps-plugin/testData/general/SourcePackagePrefix/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/SourcePackagePrefix/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/SourcePackagePrefix/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/SourcePackagePrefixWithInnerClasses/kotlinProject.ipr b/jps/jps-plugin/testData/general/SourcePackagePrefixWithInnerClasses/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/SourcePackagePrefixWithInnerClasses/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/SourcePackagePrefixWithInnerClasses/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/TestDependencyLibrary/kotlinProject.ipr b/jps/jps-plugin/testData/general/TestDependencyLibrary/kotlinProject.ipr
index 90747786771..e02c0c30a2f 100644
--- a/jps/jps-plugin/testData/general/TestDependencyLibrary/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/TestDependencyLibrary/kotlinProject.ipr
@@ -8,7 +8,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/jps/jps-plugin/testData/general/WrongArgument/kotlinProject.ipr b/jps/jps-plugin/testData/general/WrongArgument/kotlinProject.ipr
index a9c7f866ea1..30b7e74de78 100644
--- a/jps/jps-plugin/testData/general/WrongArgument/kotlinProject.ipr
+++ b/jps/jps-plugin/testData/general/WrongArgument/kotlinProject.ipr
@@ -11,7 +11,7 @@
       <module fileurl="file://$PROJECT_DIR$/kotlinProject.iml" filepath="$PROJECT_DIR$/kotlinProject.iml" />
     </modules>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA_JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file