diff --git a/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinResourceRootType.kt b/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinResourceRootType.kt
index b9172990487..1ebd0ae647e 100644
--- a/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinResourceRootType.kt
+++ b/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinResourceRootType.kt
@@ -13,8 +13,6 @@ import org.jetbrains.jps.model.module.JpsModuleSourceRootType
 
 sealed class KotlinResourceRootType(val isTest: Boolean) : JpsElementTypeBase<JavaResourceRootProperties>(),
     JpsModuleSourceRootType<JavaResourceRootProperties>, KotlinRootType {
-    object Resource : KotlinResourceRootType(false)
-    object TestResource : KotlinResourceRootType(true)
 
     override fun createDefaultProperties() =
         JpsJavaExtensionService.getInstance().createResourceRootProperties("", false)
@@ -24,4 +22,7 @@ sealed class KotlinResourceRootType(val isTest: Boolean) : JpsElementTypeBase<Ja
     override fun isForTests() = isTest
 
     override fun equals(other: Any?) = if (super.equals(other)) true else isSameRootType(this, other)
-}
\ No newline at end of file
+}
+
+object ResourceKotlinRootType : KotlinResourceRootType(false)
+object TestResourceKotlinRootType : KotlinResourceRootType(true)
\ No newline at end of file
diff --git a/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinResourceRootType.kt.182 b/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinResourceRootType.kt.182
index fff8d020dea..f56429d6ec9 100644
--- a/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinResourceRootType.kt.182
+++ b/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinResourceRootType.kt.182
@@ -13,8 +13,6 @@ import org.jetbrains.jps.model.module.JpsModuleSourceRootType
 
 sealed class KotlinResourceRootType(val isTest: Boolean) : JpsElementTypeBase<JavaResourceRootProperties>(),
     JpsModuleSourceRootType<JavaResourceRootProperties>, KotlinRootType {
-    object Resource : KotlinResourceRootType(false)
-    object TestResource : KotlinResourceRootType(true)
 
     override fun createDefaultProperties() =
         JpsJavaExtensionService.getInstance().createResourceRootProperties("", false)
@@ -22,4 +20,7 @@ sealed class KotlinResourceRootType(val isTest: Boolean) : JpsElementTypeBase<Ja
     override fun isTestRoot() = isTest
 
     override fun equals(other: Any?) = if (super.equals(other)) true else isSameRootType(this, other)
-}
\ No newline at end of file
+}
+
+object ResourceKotlinRootType : KotlinResourceRootType(false)
+object TestResourceKotlinRootType : KotlinResourceRootType(true)
\ No newline at end of file
diff --git a/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinResourceRootType.kt.191 b/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinResourceRootType.kt.191
index 09884bf560a..8ca9dea92fc 100644
--- a/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinResourceRootType.kt.191
+++ b/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinResourceRootType.kt.191
@@ -13,12 +13,13 @@ import org.jetbrains.jps.model.module.JpsModuleSourceRootType
 
 sealed class KotlinResourceRootType() : JpsElementTypeBase<JavaResourceRootProperties>(),
     JpsModuleSourceRootType<JavaResourceRootProperties> {
-    object Resource : KotlinResourceRootType()
-
-    object TestResource : KotlinResourceRootType() {
-        override fun isForTests() = true
-    }
 
     override fun createDefaultProperties() =
         JpsJavaExtensionService.getInstance().createResourceRootProperties("", false)
+}
+
+object ResourceKotlinRootType : KotlinResourceRootType()
+
+object TestResourceKotlinRootType : KotlinResourceRootType() {
+    override fun isForTests() = true
 }
\ No newline at end of file
diff --git a/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinResourceRootType.kt.as34 b/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinResourceRootType.kt.as34
index fff8d020dea..f56429d6ec9 100644
--- a/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinResourceRootType.kt.as34
+++ b/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinResourceRootType.kt.as34
@@ -13,8 +13,6 @@ import org.jetbrains.jps.model.module.JpsModuleSourceRootType
 
 sealed class KotlinResourceRootType(val isTest: Boolean) : JpsElementTypeBase<JavaResourceRootProperties>(),
     JpsModuleSourceRootType<JavaResourceRootProperties>, KotlinRootType {
-    object Resource : KotlinResourceRootType(false)
-    object TestResource : KotlinResourceRootType(true)
 
     override fun createDefaultProperties() =
         JpsJavaExtensionService.getInstance().createResourceRootProperties("", false)
@@ -22,4 +20,7 @@ sealed class KotlinResourceRootType(val isTest: Boolean) : JpsElementTypeBase<Ja
     override fun isTestRoot() = isTest
 
     override fun equals(other: Any?) = if (super.equals(other)) true else isSameRootType(this, other)
-}
\ No newline at end of file
+}
+
+object ResourceKotlinRootType : KotlinResourceRootType(false)
+object TestResourceKotlinRootType : KotlinResourceRootType(true)
\ No newline at end of file
diff --git a/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinSourceRootType.kt b/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinSourceRootType.kt
index 8b5b3d94565..f517867f2c3 100644
--- a/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinSourceRootType.kt
+++ b/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinSourceRootType.kt
@@ -12,14 +12,10 @@ import org.jetbrains.jps.model.java.JpsJavaExtensionService
 import org.jetbrains.jps.model.module.JpsModuleSourceRootType
 
 sealed class KotlinSourceRootType(val isTest: Boolean) : JpsElementTypeBase<JavaSourceRootProperties>(), JpsModuleSourceRootType<JavaSourceRootProperties>, KotlinRootType {
-    object Source : KotlinSourceRootType(false)
-    object TestSource : KotlinSourceRootType(true)
+
 
     override fun createDefaultProperties() = JpsJavaExtensionService.getInstance().createSourceRootProperties("")
 
-    companion object {
-        val ALL_SOURCES = setOf(Source, TestSource)
-    }
 
     override fun isTestRoot() = isTest
 
@@ -28,3 +24,8 @@ sealed class KotlinSourceRootType(val isTest: Boolean) : JpsElementTypeBase<Java
     override fun equals(other: Any?) = if (super.equals(other)) true else isSameRootType(this, other)
 }
 
+object SourceKotlinRootType : KotlinSourceRootType(false)
+
+object TestSourceKotlinRootType : KotlinSourceRootType(true)
+
+val ALL_KOTLIN_SOURCE_ROOT_TYPES = setOf(SourceKotlinRootType, TestSourceKotlinRootType)
diff --git a/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinSourceRootType.kt.182 b/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinSourceRootType.kt.182
index d6b6b689287..1771dcfdf20 100644
--- a/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinSourceRootType.kt.182
+++ b/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinSourceRootType.kt.182
@@ -12,17 +12,18 @@ import org.jetbrains.jps.model.java.JpsJavaExtensionService
 import org.jetbrains.jps.model.module.JpsModuleSourceRootType
 
 sealed class KotlinSourceRootType(val isTest: Boolean) : JpsElementTypeBase<JavaSourceRootProperties>(), JpsModuleSourceRootType<JavaSourceRootProperties>, KotlinRootType {
-    object Source : KotlinSourceRootType(false)
-    object TestSource : KotlinSourceRootType(true)
+
 
     override fun createDefaultProperties() = JpsJavaExtensionService.getInstance().createSourceRootProperties("")
 
-    companion object {
-        val ALL_SOURCES = setOf(Source, TestSource)
-    }
 
     override fun isTestRoot() = isTest
 
     override fun equals(other: Any?) = if (super.equals(other)) true else isSameRootType(this, other)
 }
 
+object SourceKotlinRootType : KotlinSourceRootType(false)
+
+object TestSourceKotlinRootType : KotlinSourceRootType(true)
+
+val ALL_KOTLIN_SOURCE_ROOT_TYPES = setOf(SourceKotlinRootType, TestSourceKotlinRootType)
diff --git a/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinSourceRootType.kt.191 b/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinSourceRootType.kt.191
index 551c8d26307..834e7921dbe 100644
--- a/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinSourceRootType.kt.191
+++ b/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinSourceRootType.kt.191
@@ -12,16 +12,15 @@ import org.jetbrains.jps.model.java.JpsJavaExtensionService
 import org.jetbrains.jps.model.module.JpsModuleSourceRootType
 
 sealed class KotlinSourceRootType() : JpsElementTypeBase<JavaSourceRootProperties>(), JpsModuleSourceRootType<JavaSourceRootProperties> {
-    object Source : KotlinSourceRootType()
-
-    object TestSource : KotlinSourceRootType() {
-        override fun isForTests() = true
-    }
 
     override fun createDefaultProperties() = JpsJavaExtensionService.getInstance().createSourceRootProperties("")
 
-    companion object {
-        val ALL_SOURCES = setOf(Source, TestSource)
-    }
 }
 
+object SourceKotlinRootType : KotlinSourceRootType()
+
+object TestSourceKotlinRootType : KotlinSourceRootType() {
+    override fun isForTests() = true
+}
+
+val ALL_KOTLIN_SOURCE_ROOT_TYPES = setOf(SourceKotlinRootType, TestSourceKotlinRootType)
diff --git a/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinSourceRootType.kt.as34 b/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinSourceRootType.kt.as34
index d6b6b689287..4e4b32e0e59 100644
--- a/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinSourceRootType.kt.as34
+++ b/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinSourceRootType.kt.as34
@@ -12,17 +12,20 @@ import org.jetbrains.jps.model.java.JpsJavaExtensionService
 import org.jetbrains.jps.model.module.JpsModuleSourceRootType
 
 sealed class KotlinSourceRootType(val isTest: Boolean) : JpsElementTypeBase<JavaSourceRootProperties>(), JpsModuleSourceRootType<JavaSourceRootProperties>, KotlinRootType {
-    object Source : KotlinSourceRootType(false)
-    object TestSource : KotlinSourceRootType(true)
+
 
     override fun createDefaultProperties() = JpsJavaExtensionService.getInstance().createSourceRootProperties("")
 
-    companion object {
-        val ALL_SOURCES = setOf(Source, TestSource)
-    }
 
     override fun isTestRoot() = isTest
 
+    fun isForTests() = isTest
+
     override fun equals(other: Any?) = if (super.equals(other)) true else isSameRootType(this, other)
 }
 
+object SourceKotlinRootType : KotlinSourceRootType(false)
+
+object TestSourceKotlinRootType : KotlinSourceRootType(true)
+
+val ALL_KOTLIN_SOURCE_ROOT_TYPES = setOf(SourceKotlinRootType, TestSourceKotlinRootType)
diff --git a/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinSourceRootType.kt.as35 b/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinSourceRootType.kt.as35
new file mode 100644
index 00000000000..4e4b32e0e59
--- /dev/null
+++ b/jps/jps-common/src/org/jetbrains/kotlin/config/KotlinSourceRootType.kt.as35
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.config
+
+import org.jetbrains.jps.model.ex.JpsElementTypeBase
+import org.jetbrains.jps.model.java.JavaSourceRootProperties
+import org.jetbrains.jps.model.java.JavaSourceRootType
+import org.jetbrains.jps.model.java.JpsJavaExtensionService
+import org.jetbrains.jps.model.module.JpsModuleSourceRootType
+
+sealed class KotlinSourceRootType(val isTest: Boolean) : JpsElementTypeBase<JavaSourceRootProperties>(), JpsModuleSourceRootType<JavaSourceRootProperties>, KotlinRootType {
+
+
+    override fun createDefaultProperties() = JpsJavaExtensionService.getInstance().createSourceRootProperties("")
+
+
+    override fun isTestRoot() = isTest
+
+    fun isForTests() = isTest
+
+    override fun equals(other: Any?) = if (super.equals(other)) true else isSameRootType(this, other)
+}
+
+object SourceKotlinRootType : KotlinSourceRootType(false)
+
+object TestSourceKotlinRootType : KotlinSourceRootType(true)
+
+val ALL_KOTLIN_SOURCE_ROOT_TYPES = setOf(SourceKotlinRootType, TestSourceKotlinRootType)
diff --git a/jps/jps-common/src/org/jetbrains/kotlin/config/moduleSourceRootPropertiesSerializers.kt b/jps/jps-common/src/org/jetbrains/kotlin/config/moduleSourceRootPropertiesSerializers.kt
index 77d487c457d..99c8f408a38 100644
--- a/jps/jps-common/src/org/jetbrains/kotlin/config/moduleSourceRootPropertiesSerializers.kt
+++ b/jps/jps-common/src/org/jetbrains/kotlin/config/moduleSourceRootPropertiesSerializers.kt
@@ -27,12 +27,12 @@ sealed class KotlinSourceRootPropertiesSerializer(
     typeId: String
 ) : JpsModuleSourceRootPropertiesSerializer<JavaSourceRootProperties>(type, typeId) {
     object Source : KotlinSourceRootPropertiesSerializer(
-            KotlinSourceRootType.Source,
+            SourceKotlinRootType,
             KOTLIN_SOURCE_ROOT_TYPE_ID
     )
 
     object TestSource : KotlinSourceRootPropertiesSerializer(
-            KotlinSourceRootType.TestSource,
+            TestSourceKotlinRootType,
             KOTLIN_TEST_ROOT_TYPE_ID
     )
 
@@ -59,12 +59,12 @@ sealed class KotlinResourceRootPropertiesSerializer(
     typeId: String
 ) : JpsModuleSourceRootPropertiesSerializer<JavaResourceRootProperties>(type, typeId) {
     object Resource : KotlinResourceRootPropertiesSerializer(
-            KotlinResourceRootType.Resource,
+            ResourceKotlinRootType,
             KOTLIN_RESOURCE_ROOT_TYPE_ID
     )
     object TestResource : KotlinResourceRootPropertiesSerializer(
-            KotlinResourceRootType.TestResource,
-            KOTLIN_TEST_RESOURCE_ROOT_TYPE_ID
+        TestResourceKotlinRootType,
+        KOTLIN_TEST_RESOURCE_ROOT_TYPE_ID
     )
 
     override fun loadProperties(sourceRootTag: Element): JavaResourceRootProperties {
diff --git a/jps/jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinResourcesRootProvider.kt b/jps/jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinResourcesRootProvider.kt
index cd6be0fbc51..5b1aae8e5a4 100644
--- a/jps/jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinResourcesRootProvider.kt
+++ b/jps/jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinResourcesRootProvider.kt
@@ -12,7 +12,8 @@ import org.jetbrains.jps.builders.java.ResourcesTargetType
 import org.jetbrains.jps.builders.storage.BuildDataPaths
 import org.jetbrains.jps.incremental.ResourcesTarget
 import org.jetbrains.jps.model.java.JavaResourceRootProperties
-import org.jetbrains.kotlin.config.KotlinResourceRootType
+import org.jetbrains.kotlin.config.ResourceKotlinRootType
+import org.jetbrains.kotlin.config.TestResourceKotlinRootType
 
 class KotlinResourcesRootProvider : AdditionalRootsProviderService<ResourceRootDescriptor>(ResourcesTargetType.ALL_TYPES) {
     override fun getAdditionalRoots(
@@ -26,7 +27,7 @@ class KotlinResourcesRootProvider : AdditionalRootsProviderService<ResourceRootD
 
         // Add source roots with type KotlinResourceRootType.
         // See the note in KotlinSourceRootProvider
-        val kotlinResourceRootType = if (target.isTests) KotlinResourceRootType.TestResource else KotlinResourceRootType.Resource
+        val kotlinResourceRootType = if (target.isTests) TestResourceKotlinRootType else ResourceKotlinRootType
         module.getSourceRoots(kotlinResourceRootType).forEach {
             result.add(
                 ResourceRootDescriptor(
diff --git a/jps/jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinSourceRootProvider.kt b/jps/jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinSourceRootProvider.kt
index 307e75b6df6..ad68046dd04 100644
--- a/jps/jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinSourceRootProvider.kt
+++ b/jps/jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinSourceRootProvider.kt
@@ -16,8 +16,7 @@ import org.jetbrains.jps.model.java.JavaSourceRootProperties
 import org.jetbrains.jps.model.java.JavaSourceRootType
 import org.jetbrains.jps.model.module.JpsModule
 import org.jetbrains.jps.model.module.JpsModuleSourceRootType
-import org.jetbrains.kotlin.config.KotlinResourceRootType
-import org.jetbrains.kotlin.config.KotlinSourceRootType
+import org.jetbrains.kotlin.config.*
 import org.jetbrains.kotlin.jps.model.expectedByModules
 import org.jetbrains.kotlin.jps.model.isTestModule
 import org.jetbrains.kotlin.jps.model.sourceSetModules
@@ -39,7 +38,7 @@ class KotlinSourceRootProvider : AdditionalRootsProviderService<JavaSourceRootDe
         // `ModuleBuildTarget.computeAllTargets`. `ModuleBuildTarget` is required for incremental compilation.
         // We cannot define our own `ModuleBuildTarget` since it is final and `ModuleBuildTarget` supports only `JavaSourceRootDescriptor`.
         // So the only one way to support `KotlinSourceRootType` is to add a fake `JavaSourceRootDescriptor` for each source root with that type.
-        val kotlinSourceRootType = if (target.isTests) KotlinSourceRootType.TestSource else KotlinSourceRootType.Source
+        val kotlinSourceRootType = if (target.isTests) TestSourceKotlinRootType else SourceKotlinRootType
         module.getSourceRoots(kotlinSourceRootType).forEach {
             result.add(
                 JavaSourceRootDescriptor(
@@ -95,8 +94,8 @@ class KotlinSourceRootProvider : AdditionalRootsProviderService<JavaSourceRootDe
 
 private val JpsModuleSourceRootType<*>.isTestsRootType
     get() = when (this) {
-        is KotlinSourceRootType -> this == KotlinSourceRootType.TestSource
-        is KotlinResourceRootType -> this == KotlinResourceRootType.TestResource
+        is KotlinSourceRootType -> this == TestSourceKotlinRootType
+        is KotlinResourceRootType -> this == TestResourceKotlinRootType
         // for compatibility:
         is JavaSourceRootType -> this == JavaSourceRootType.TEST_SOURCE
         is JavaResourceRootType -> this == JavaResourceRootType.TEST_RESOURCE