diff --git a/platform/platform-impl/src/com/intellij/diagnostic/TestMessageBoxAction.java b/platform/platform-impl/src/com/intellij/diagnostic/TestMessageBoxAction.java
new file mode 100644
index 000000000000..1ce1caf68d7f
--- /dev/null
+++ b/platform/platform-impl/src/com/intellij/diagnostic/TestMessageBoxAction.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2000-2010 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.diagnostic;
+
+import com.intellij.openapi.actionSystem.AnAction;
+import com.intellij.openapi.actionSystem.AnActionEvent;
+import com.intellij.openapi.ui.Messages;
+
+
+public class TestMessageBoxAction extends AnAction {
+  public TestMessageBoxAction() {
+    super("Test message box");
+  }
+
+  @Override
+  public void actionPerformed(final AnActionEvent e) {
+    final long l = System.currentTimeMillis();
+    if (l % 3 == 0) {
+      Messages.showErrorDialog("Test error message.", "Test");
+    }
+    else if (l % 5 == 0) {
+      Messages.showWarningDialog("Test warning message.", "Test");
+    }
+    else {
+      Messages.showInfoMessage("Test info message.", "Test");
+    }
+  }
+}
diff --git a/platform/platform-resources/src/idea/PlatformActions.xml b/platform/platform-resources/src/idea/PlatformActions.xml
index b9b94ee9e6da..aa0719c09fb5 100644
--- a/platform/platform-resources/src/idea/PlatformActions.xml
+++ b/platform/platform-resources/src/idea/PlatformActions.xml
@@ -428,7 +428,7 @@
       <separator/>
       <action id="NotificationTestAction" internal="true" class="com.intellij.notification.impl.actions.NotificationTestAction"
               text="Add Test Notification"/>
-
+      <action id="TestMessageBoxAction" internal="true" class="com.intellij.diagnostic.TestMessageBoxAction" text="Show Test Dialog"/>
       <separator/>
       <reference ref="MaintenanceGroup"/>