diff --git a/src/test/java/org/apache/sling/servlets/get/impl/DefaultGetServletTest.java b/src/test/java/org/apache/sling/servlets/get/impl/DefaultGetServletTest.java
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+++ b/src/test/java/org/apache/sling/servlets/get/impl/DefaultGetServletTest.java
@@ -0,0 +1,57 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 org.apache.sling.servlets.get.impl;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+
+import java.lang.reflect.Field;
+import java.util.Map;
+
+import javax.servlet.Servlet;
+
+import org.junit.Test;
+import org.mockito.Mockito;
+
+public class DefaultGetServletTest {
+
+    @Test public void testDisabledAlias() throws Exception {
+        final DefaultGetServlet servlet = new DefaultGetServlet();
+        final DefaultGetServlet.Config config = Mockito.mock(DefaultGetServlet.Config.class);
+        Mockito.when(config.enable_html()).thenReturn(true);
+        Mockito.when(config.enable_json()).thenReturn(true);
+        Mockito.when(config.enable_xml()).thenReturn(false);
+        Mockito.when(config.enable_txt()).thenReturn(false);
+        Mockito.when(config.aliases()).thenReturn(new String[] {"xml:pdf"});
+        servlet.activate(config);
+
+        servlet.init();
+
+        final Field field = DefaultGetServlet.class.getDeclaredField("rendererMap");
+        field.setAccessible(true);
+
+        @SuppressWarnings("unchecked")
+        final Map<String, Servlet> map = (Map<String, Servlet>) field.get(servlet);
+        assertEquals(4, map.size());
+        assertNotNull(map.get("res"));
+        assertNotNull(map.get("html"));
+        assertNotNull(map.get("json"));
+        assertNotNull(map.get("pdf"));
+    }
+}