diff --git a/compiler/testData/mockJDK/jre/lib/rt.jar b/compiler/testData/mockJDK/jre/lib/rt.jar
index 0077dce4512..e4c64fe4bc5 100644
Binary files a/compiler/testData/mockJDK/jre/lib/rt.jar and b/compiler/testData/mockJDK/jre/lib/rt.jar differ
diff --git a/compiler/testData/mockJDK/src.zip b/compiler/testData/mockJDK/src.zip
index 4ccea0710d6..c0685063fd0 100644
Binary files a/compiler/testData/mockJDK/src.zip and b/compiler/testData/mockJDK/src.zip differ
diff --git a/generators/src/org/jetbrains/kotlin/generators/mockJDK/GenerateMockJdk.java b/generators/src/org/jetbrains/kotlin/generators/mockJDK/GenerateMockJdk.java
index 5c0d49e04a4..6370efd88bb 100644
--- a/generators/src/org/jetbrains/kotlin/generators/mockJDK/GenerateMockJdk.java
+++ b/generators/src/org/jetbrains/kotlin/generators/mockJDK/GenerateMockJdk.java
@@ -254,6 +254,7 @@ public class GenerateMockJdk {
             "java/util/Properties.class",
             "java/util/Random.class",
             "java/util/RandomAccess.class",
+            "java/util/regex/Pattern.class",
             "java/util/Objects.class",
             "java/util/Set.class",
             "java/util/SortedMap.class",
diff --git a/j2k/testData/fileOrElement/methodCallExpression/stringMethods.kt b/j2k/testData/fileOrElement/methodCallExpression/stringMethods.kt
index f2ae873850e..198dd80001f 100644
--- a/j2k/testData/fileOrElement/methodCallExpression/stringMethods.kt
+++ b/j2k/testData/fileOrElement/methodCallExpression/stringMethods.kt
@@ -1,10 +1,3 @@
-// ERROR: Overload resolution ambiguity:  public fun kotlin.String.split(regex: [ERROR : java.util.regex.Pattern], limit: kotlin.Int = ...): kotlin.List<kotlin.String> defined in kotlin public fun kotlin.String.split(pattern: kotlin.text.Regex, limit: kotlin.Int = ...): kotlin.List<kotlin.String> defined in kotlin
-// ERROR: Unresolved reference: it
-// ERROR: Overload resolution ambiguity:  public fun kotlin.String.split(regex: [ERROR : java.util.regex.Pattern], limit: kotlin.Int = ...): kotlin.List<kotlin.String> defined in kotlin public fun kotlin.String.split(pattern: kotlin.text.Regex, limit: kotlin.Int = ...): kotlin.List<kotlin.String> defined in kotlin
-// ERROR: Unresolved reference: it
-// ERROR: Overload resolution ambiguity:  public fun kotlin.String.split(regex: [ERROR : java.util.regex.Pattern], limit: kotlin.Int = ...): kotlin.List<kotlin.String> defined in kotlin public fun kotlin.String.split(pattern: kotlin.text.Regex, limit: kotlin.Int = ...): kotlin.List<kotlin.String> defined in kotlin
-// ERROR: Overload resolution ambiguity:  public fun kotlin.String.split(regex: [ERROR : java.util.regex.Pattern], limit: kotlin.Int = ...): kotlin.List<kotlin.String> defined in kotlin public fun kotlin.String.split(pattern: kotlin.text.Regex, limit: kotlin.Int = ...): kotlin.List<kotlin.String> defined in kotlin
-// ERROR: Overload resolution ambiguity:  public fun kotlin.String.split(regex: [ERROR : java.util.regex.Pattern], limit: kotlin.Int = ...): kotlin.List<kotlin.String> defined in kotlin public fun kotlin.String.split(pattern: kotlin.text.Regex, limit: kotlin.Int = ...): kotlin.List<kotlin.String> defined in kotlin
 import java.nio.charset.Charset
 import java.util.*
 
@@ -84,8 +77,8 @@ internal class A {
         s.matches("\\w+".toRegex())
         s.replace("\\w+".toRegex(), "---")
         s.replaceFirst("([s-t])".toRegex(), "A$1")
-        useSplit(s.split("\\s+".toRegex()).dropLastWhile({ it.isEmpty() }).toTypedArray())
-        useSplit(s.split("\\s+".toRegex()).dropLastWhile({ it.isEmpty() }).toTypedArray())
+        useSplit(s.split("\\s+".toRegex()).dropLastWhile { it.isEmpty() }.toTypedArray())
+        useSplit(s.split("\\s+".toRegex()).dropLastWhile { it.isEmpty() }.toTypedArray())
         useSplit(s.split("\\s+".toRegex()).toTypedArray())
         useSplit(s.split("\\s+".toRegex(), 2).toTypedArray())
         val limit = 5