diff --git a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/ChecksTest.kt b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/ChecksTest.kt
index d08bc31654a..5b49d6f51a6 100644
--- a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/ChecksTest.kt
+++ b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/ChecksTest.kt
@@ -1,9 +1,12 @@
 // Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.debugger.streams.kotlin.exec.collection
 
+import org.junit.Ignore
+
 /**
  * @author Vitaliy.Bibaev
  */
+@Ignore("enable to test collection transform operations")
 class ChecksTest : CollectionTestCase("checks") {
   fun testAllMatchFalse() {
     doTestWithResult()
diff --git a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/DifferentSourceTest.kt b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/DifferentSourceTest.kt
index ad746fe89dc..e30abb6eef9 100644
--- a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/DifferentSourceTest.kt
+++ b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/DifferentSourceTest.kt
@@ -1,9 +1,12 @@
 // Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.debugger.streams.kotlin.exec.collection
 
+import org.junit.Ignore
+
 /**
  * @author Vitaliy.Bibaev
  */
+@Ignore("enable to test collection transform operations")
 class DifferentSourceTest : CollectionTestCase("source") {
   fun testCollectionAsSource() = doTestWithResult()
   fun testStringAsSource() = doTestWithResult()
diff --git a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/DistinctOperationsTest.kt b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/DistinctOperationsTest.kt
index 0e75931d860..47701eae128 100644
--- a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/DistinctOperationsTest.kt
+++ b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/DistinctOperationsTest.kt
@@ -1,9 +1,12 @@
 // Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.debugger.streams.kotlin.exec.collection
 
+import org.junit.Ignore
+
 /**
  * @author Vitaliy.Bibaev
  */
+@Ignore("enable to test collection transform operations")
 class DistinctOperationsTest : CollectionTestCase("distinct") {
   fun testDistinct() {
     doTestWithResult()
diff --git a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/FilterOperationsTest.kt b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/FilterOperationsTest.kt
index f027985c893..d5ca00beabc 100644
--- a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/FilterOperationsTest.kt
+++ b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/FilterOperationsTest.kt
@@ -1,9 +1,12 @@
 // Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.debugger.streams.kotlin.exec.collection
 
+import org.junit.Ignore
+
 /**
  * @author Vitaliy.Bibaev
  */
+@Ignore("enable to test collection transform operations")
 class FilterOperationsTest : CollectionTestCase("filter") {
   fun testFilterAsIntermediate() = doTestWithResult()
   fun testFilterAsTerminal() = doTestWithResult()
diff --git a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/FinalOperationsTest.kt b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/FinalOperationsTest.kt
index 0e28c3a982e..6542ae24803 100644
--- a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/FinalOperationsTest.kt
+++ b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/FinalOperationsTest.kt
@@ -1,9 +1,12 @@
 // Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.debugger.streams.kotlin.exec.collection
 
+import org.junit.Ignore
+
 /**
  * @author Vitaliy.Bibaev
  */
+@Ignore("enable to test collection transform operations")
 class FinalOperationsTest : CollectionTestCase("final") {
   fun testAverage() {
     doTestWithResult()
diff --git a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/FlatMapOperationsTest.kt b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/FlatMapOperationsTest.kt
index b0632d22b5d..1cf978a9df8 100644
--- a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/FlatMapOperationsTest.kt
+++ b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/FlatMapOperationsTest.kt
@@ -1,9 +1,12 @@
 // Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.debugger.streams.kotlin.exec.collection
 
+import org.junit.Ignore
+
 /**
  * @author Vitaliy.Bibaev
  */
+@Ignore("enable to test collection transform operations")
 class FlatMapOperationsTest : CollectionTestCase("flatMap") {
   fun testFlatMap() {
     doTestWithResult()
diff --git a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/GroupingOperationsTest.kt b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/GroupingOperationsTest.kt
index 4601d836dd7..e431fbf85c1 100644
--- a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/GroupingOperationsTest.kt
+++ b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/GroupingOperationsTest.kt
@@ -1,9 +1,12 @@
 // Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.debugger.streams.kotlin.exec.collection
 
+import org.junit.Ignore
+
 /**
  * @author Vitaliy.Bibaev
  */
+@Ignore("enable to test collection transform operations")
 class GroupingOperationsTest : CollectionTestCase("grouping") {
   fun testGroupBy() {
     doTestWithResult()
diff --git a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/MapOperationsTest.kt b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/MapOperationsTest.kt
index a20173e2c32..2a23cb83c80 100644
--- a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/MapOperationsTest.kt
+++ b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/MapOperationsTest.kt
@@ -1,9 +1,12 @@
 // Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.debugger.streams.kotlin.exec.collection
 
+import org.junit.Ignore
+
 /**
  * @author Vitaliy.Bibaev
  */
+@Ignore("enable to test collection transform operations")
 class MapOperationsTest : CollectionTestCase("map") {
   fun testMap() {
     doTestWithResult()
diff --git a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/MiscOperationsTest.kt b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/MiscOperationsTest.kt
index 93a526e05a5..16798ec725d 100644
--- a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/MiscOperationsTest.kt
+++ b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/MiscOperationsTest.kt
@@ -1,9 +1,12 @@
 // Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.debugger.streams.kotlin.exec.collection
 
+import org.junit.Ignore
+
 /**
  * @author Vitaliy.Bibaev
  */
+@Ignore("enable to test collection transform operations")
 class MiscOperationsTest : CollectionTestCase("misc") {
   fun testIndexOf() {
     doTestWithResult()
diff --git a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/ZipOperationsTest.kt b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/ZipOperationsTest.kt
index 294d4584051..cc97908b803 100644
--- a/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/ZipOperationsTest.kt
+++ b/idea/tests/com/intellij/debugger/streams/kotlin/exec/collection/ZipOperationsTest.kt
@@ -1,9 +1,12 @@
 // Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.debugger.streams.kotlin.exec.collection
 
+import org.junit.Ignore
+
 /**
  * @author Vitaliy.Bibaev
  */
+@Ignore("enable to test collection transform operations")
 class ZipOperationsTest : CollectionTestCase("zip") {
   fun testZipWithSame() {
     doTestWithResult()