diff --git a/idea/idea-test-framework/src/org/jetbrains/kotlin/idea/test/KotlinMultiFileTestCase.kt b/idea/idea-test-framework/src/org/jetbrains/kotlin/idea/test/KotlinMultiFileTestCase.kt
index 4270b923489..3df02effb8b 100644
--- a/idea/idea-test-framework/src/org/jetbrains/kotlin/idea/test/KotlinMultiFileTestCase.kt
+++ b/idea/idea-test-framework/src/org/jetbrains/kotlin/idea/test/KotlinMultiFileTestCase.kt
@@ -17,11 +17,13 @@
 package org.jetbrains.kotlin.idea.test
 
 import com.intellij.ide.highlighter.ModuleFileType
+import com.intellij.openapi.fileEditor.FileDocumentManager
 import com.intellij.openapi.module.ModuleManager
 import com.intellij.openapi.vfs.VfsUtilCore
 import com.intellij.openapi.vfs.VirtualFile
 import com.intellij.openapi.vfs.VirtualFileVisitor
 import com.intellij.openapi.vfs.newvfs.impl.VfsRootAccess
+import com.intellij.psi.PsiDocumentManager
 import com.intellij.refactoring.MultiFileTestCase
 import com.intellij.testFramework.PsiTestUtil
 import org.jetbrains.kotlin.idea.util.application.runWriteAction
@@ -35,6 +37,22 @@ abstract class KotlinMultiFileTestCase : MultiFileTestCase() {
         VfsRootAccess.allowRootAccess(KotlinTestUtils.getHomeDirectory())
     }
 
+    protected fun getTestDirName(lowercaseFirstLetter : Boolean) : String {
+        val testName = getTestName(lowercaseFirstLetter)
+        val endIndex = testName.lastIndexOf('_')
+        if (endIndex < 0) return testName
+        return testName.substring(0, endIndex).replace('_', '/')
+    }
+
+    protected fun doTestCommittingDocuments(action : (VirtualFile, VirtualFile?) -> Unit) {
+        super.doTest({ rootDir, rootAfter ->
+                         action(rootDir, rootAfter)
+
+                         PsiDocumentManager.getInstance(project!!).commitAllDocuments()
+                         FileDocumentManager.getInstance().saveAllDocuments()
+                     }, getTestDirName(true))
+    }
+
     override fun prepareProject(rootDir: VirtualFile) {
         if (isMultiModule) {
             val model = ModuleManager.getInstance(project).modifiableModel
diff --git a/idea/tests/org/jetbrains/kotlin/idea/codeInsight/AbstractMultiFileInspectionTest.kt b/idea/tests/org/jetbrains/kotlin/idea/codeInsight/AbstractMultiFileInspectionTest.kt
index 351cd852c01..9e204484153 100644
--- a/idea/tests/org/jetbrains/kotlin/idea/codeInsight/AbstractMultiFileInspectionTest.kt
+++ b/idea/tests/org/jetbrains/kotlin/idea/codeInsight/AbstractMultiFileInspectionTest.kt
@@ -85,11 +85,6 @@ abstract class AbstractMultiFileInspectionTest : KotlinMultiFileTestCase() {
                getTestDirName(true))
     }
 
-    protected fun getTestDirName(lowercaseFirstLetter : Boolean) : String {
-        val testName = getTestName(lowercaseFirstLetter)
-        return testName.substring(0, testName.lastIndexOf('_')).replace('_', '/')
-    }
-
     override fun getTestRoot() : String {
         return "/multiFileInspections/"
     }
diff --git a/idea/tests/org/jetbrains/kotlin/idea/refactoring/move/AbstractMultiModuleMoveTest.kt b/idea/tests/org/jetbrains/kotlin/idea/refactoring/move/AbstractMultiModuleMoveTest.kt
index b7c70db05f2..2a4f1574366 100644
--- a/idea/tests/org/jetbrains/kotlin/idea/refactoring/move/AbstractMultiModuleMoveTest.kt
+++ b/idea/tests/org/jetbrains/kotlin/idea/refactoring/move/AbstractMultiModuleMoveTest.kt
@@ -16,11 +16,8 @@
 
 package org.jetbrains.kotlin.idea.refactoring.move
 
-import com.intellij.openapi.fileEditor.FileDocumentManager
 import com.intellij.openapi.module.Module
 import com.intellij.openapi.module.ModuleManager
-import com.intellij.openapi.vfs.VirtualFile
-import com.intellij.psi.PsiDocumentManager
 import org.jetbrains.kotlin.idea.refactoring.rename.loadTestConfiguration
 import org.jetbrains.kotlin.idea.test.ConfigLibraryUtil
 import org.jetbrains.kotlin.idea.test.KotlinMultiFileTestCase
@@ -71,18 +68,4 @@ abstract class AbstractMultiModuleMoveTest : KotlinMultiFileTestCase() {
             }
         }
     }
-
-    protected fun doTestCommittingDocuments(action : (VirtualFile, VirtualFile?) -> Unit) {
-        super.doTest({ rootDir, rootAfter ->
-                         action(rootDir, rootAfter)
-
-                         PsiDocumentManager.getInstance(project!!).commitAllDocuments()
-                         FileDocumentManager.getInstance().saveAllDocuments()
-                     }, getTestDirName(true))
-    }
-
-    protected fun getTestDirName(lowercaseFirstLetter : Boolean) : String {
-        val testName = getTestName(lowercaseFirstLetter)
-        return testName.substring(0, testName.indexOf('_'))
-    }
 }
\ No newline at end of file
diff --git a/idea/tests/org/jetbrains/kotlin/idea/refactoring/rename/AbstractMultiModuleRenameTest.kt b/idea/tests/org/jetbrains/kotlin/idea/refactoring/rename/AbstractMultiModuleRenameTest.kt
index 027b5aa66d7..76d0130d21d 100644
--- a/idea/tests/org/jetbrains/kotlin/idea/refactoring/rename/AbstractMultiModuleRenameTest.kt
+++ b/idea/tests/org/jetbrains/kotlin/idea/refactoring/rename/AbstractMultiModuleRenameTest.kt
@@ -16,9 +16,6 @@
 
 package org.jetbrains.kotlin.idea.refactoring.rename
 
-import com.intellij.openapi.fileEditor.FileDocumentManager
-import com.intellij.openapi.vfs.VirtualFile
-import com.intellij.psi.PsiDocumentManager
 import com.intellij.psi.PsiManager
 import junit.framework.TestCase
 import org.jetbrains.kotlin.idea.jsonUtils.getString
@@ -51,18 +48,4 @@ abstract class AbstractMultiModuleRenameTest : KotlinMultiFileTestCase() {
             }
         }
     }
-
-    protected fun doTestCommittingDocuments(action : (VirtualFile, VirtualFile?) -> Unit) {
-        super.doTest({ rootDir, rootAfter ->
-            action(rootDir, rootAfter)
-
-            PsiDocumentManager.getInstance(project!!).commitAllDocuments()
-            FileDocumentManager.getInstance().saveAllDocuments()
-        }, getTestDirName(true))
-    }
-
-    protected fun getTestDirName(lowercaseFirstLetter : Boolean) : String {
-        val testName = getTestName(lowercaseFirstLetter)
-        return testName.substring(0, testName.indexOf('_'))
-    }
 }