diff --git a/plugins/devkit/src/testAssistant/TestDataGroupEditorProvider.java b/plugins/devkit/src/testAssistant/TestDataGroupEditorProvider.java
index 75b17e33dcfc..1096b3fcb7d9 100644
--- a/plugins/devkit/src/testAssistant/TestDataGroupEditorProvider.java
+++ b/plugins/devkit/src/testAssistant/TestDataGroupEditorProvider.java
@@ -19,6 +19,7 @@ import com.intellij.openapi.fileEditor.FileEditor;
 import com.intellij.openapi.fileEditor.FileEditorPolicy;
 import com.intellij.openapi.fileEditor.FileEditorProvider;
 import com.intellij.openapi.fileEditor.FileEditorState;
+import com.intellij.openapi.project.DumbAware;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.Disposer;
 import com.intellij.openapi.vfs.VirtualFile;
@@ -28,7 +29,7 @@ import org.jetbrains.annotations.NotNull;
 /**
  * @author yole
  */
-public class TestDataGroupEditorProvider implements FileEditorProvider {
+public class TestDataGroupEditorProvider implements FileEditorProvider, DumbAware {
   public boolean accept(@NotNull Project project, @NotNull VirtualFile file) {
     return file instanceof TestDataGroupVirtualFile;
   }
diff --git a/plugins/ui-designer/src/com/intellij/uiDesigner/editor/UIFormEditorProvider.java b/plugins/ui-designer/src/com/intellij/uiDesigner/editor/UIFormEditorProvider.java
index 73f40c0aa8b2..1e043a3be4af 100644
--- a/plugins/ui-designer/src/com/intellij/uiDesigner/editor/UIFormEditorProvider.java
+++ b/plugins/ui-designer/src/com/intellij/uiDesigner/editor/UIFormEditorProvider.java
@@ -22,6 +22,7 @@ import com.intellij.openapi.fileEditor.FileEditorProvider;
 import com.intellij.openapi.fileEditor.FileEditorState;
 import com.intellij.openapi.fileTypes.StdFileTypes;
 import com.intellij.openapi.module.ModuleUtil;
+import com.intellij.openapi.project.DumbAware;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.Disposer;
 import com.intellij.openapi.vfs.VirtualFile;
@@ -30,7 +31,7 @@ import com.intellij.util.ArrayUtil;
 import org.jdom.Element;
 import org.jetbrains.annotations.NotNull;
 
-public final class UIFormEditorProvider implements FileEditorProvider {
+public final class UIFormEditorProvider implements FileEditorProvider, DumbAware {
   private static final Logger LOG = Logger.getInstance("#com.intellij.uiDesigner.editor.UIFormEditorProvider");
 
   public boolean accept(@NotNull final Project project, @NotNull final VirtualFile file){