diff --git a/platform/external-system-api/src/com/intellij/openapi/externalSystem/task/ExternalSystemTaskManager.java b/platform/external-system-api/src/com/intellij/openapi/externalSystem/task/ExternalSystemTaskManager.java
index c65c7a45fc26..1c51b5a58041 100644
--- a/platform/external-system-api/src/com/intellij/openapi/externalSystem/task/ExternalSystemTaskManager.java
+++ b/platform/external-system-api/src/com/intellij/openapi/externalSystem/task/ExternalSystemTaskManager.java
@@ -32,19 +32,14 @@ import java.util.List;
  */
 public interface ExternalSystemTaskManager<S extends ExternalSystemExecutionSettings> {
 
-  /**
-   *
-   * @deprecated will be removed in 13.1
-   */
-  @Deprecated
   void executeTasks(@NotNull ExternalSystemTaskId id,
                     @NotNull List<String> taskNames,
                     @NotNull String projectPath,
                     @Nullable S settings,
-                    @Nullable String vmOptions,
+                    @NotNull final List<String> vmOptions,
+                    @NotNull List<String> scriptParameters,
                     @Nullable String debuggerSetup,
-                    @NotNull ExternalSystemTaskNotificationListener listener)
-    throws ExternalSystemException;
+                    @NotNull ExternalSystemTaskNotificationListener listener) throws ExternalSystemException;
 
   boolean cancelTask(@NotNull ExternalSystemTaskId id,
                   @NotNull ExternalSystemTaskNotificationListener listener)
diff --git a/platform/external-system-impl/src/com/intellij/openapi/externalSystem/service/remote/RemoteExternalSystemTaskManagerImpl.java b/platform/external-system-impl/src/com/intellij/openapi/externalSystem/service/remote/RemoteExternalSystemTaskManagerImpl.java
index 566695a524f6..f132e43d1102 100644
--- a/platform/external-system-impl/src/com/intellij/openapi/externalSystem/service/remote/RemoteExternalSystemTaskManagerImpl.java
+++ b/platform/external-system-impl/src/com/intellij/openapi/externalSystem/service/remote/RemoteExternalSystemTaskManagerImpl.java
@@ -18,10 +18,8 @@ package com.intellij.openapi.externalSystem.service.remote;
 import com.intellij.openapi.externalSystem.model.ExternalSystemException;
 import com.intellij.openapi.externalSystem.model.settings.ExternalSystemExecutionSettings;
 import com.intellij.openapi.externalSystem.model.task.ExternalSystemTaskId;
-import com.intellij.openapi.externalSystem.task.AbstractExternalSystemTaskManager;
 import com.intellij.openapi.externalSystem.task.ExternalSystemTaskManager;
 import com.intellij.util.Producer;
-import com.intellij.util.execution.ParametersListUtil;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -55,12 +53,8 @@ public class RemoteExternalSystemTaskManagerImpl<S extends ExternalSystemExecuti
       @Nullable
       @Override
       public Object produce() {
-        if(myDelegate instanceof AbstractExternalSystemTaskManager) {
-          ((AbstractExternalSystemTaskManager<S>)myDelegate)
-            .executeTasks(id, taskNames, projectPath, settings, vmOptions, scriptParameters, debuggerSetup, getNotificationListener());
-        } else {
-          myDelegate.executeTasks(id, taskNames, projectPath, settings, ParametersListUtil.join(vmOptions), debuggerSetup, getNotificationListener());
-        }
+        myDelegate.executeTasks(
+          id, taskNames, projectPath, settings, vmOptions, scriptParameters, debuggerSetup, getNotificationListener());
         return null;
       }
     });
diff --git a/plugins/gradle/src/org/jetbrains/plugins/gradle/service/task/GradleTaskManager.java b/plugins/gradle/src/org/jetbrains/plugins/gradle/service/task/GradleTaskManager.java
index b59668e63c2e..5837c5c103ce 100644
--- a/plugins/gradle/src/org/jetbrains/plugins/gradle/service/task/GradleTaskManager.java
+++ b/plugins/gradle/src/org/jetbrains/plugins/gradle/service/task/GradleTaskManager.java
@@ -49,20 +49,6 @@ public class GradleTaskManager extends AbstractExternalSystemTaskManager<GradleE
 
   private final GradleExecutionHelper myHelper = new GradleExecutionHelper();
 
-  /**
-   * TODO: remove the method in 13.1
-   */
-  @Override
-  public void executeTasks(@NotNull ExternalSystemTaskId id,
-                           @NotNull List<String> taskNames,
-                           @NotNull String projectPath,
-                           @Nullable GradleExecutionSettings settings,
-                           @Nullable String vmOptions,
-                           @Nullable String debuggerSetup,
-                           @NotNull ExternalSystemTaskNotificationListener listener) throws ExternalSystemException {
-    throw new UnsupportedOperationException();
-  }
-
   @Override
   public void executeTasks(@NotNull final ExternalSystemTaskId id,
                            @NotNull final List<String> taskNames,