diff --git a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestPath.java b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestPath.java
index e775d1d069dcb..291e4a67482b2 100644
--- a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestPath.java
+++ b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestPath.java
@@ -404,6 +404,8 @@ public void testGetName() {
   
   @Test (timeout = 30000)
   public void testAvroReflect() throws Exception {
+    // Avro expects explicitely stated, trusted packages used for (de-)serialization
+    System.setProperty("org.apache.avro.SERIALIZABLE_PACKAGES", "org.apache.hadoop.fs.Path");
     AvroTestUtil.testReflect
       (new Path("foo"),
        "{\"type\":\"string\",\"java-class\":\"org.apache.hadoop.fs.Path\"}");
diff --git a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/TestText.java b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/TestText.java
index 4eb260c033596..473a2b0766d13 100644
--- a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/TestText.java
+++ b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/TestText.java
@@ -344,6 +344,8 @@ public void testConcurrentEncodeDecode() throws Exception{
 
   @Test
   public void testAvroReflect() throws Exception {
+    // Avro expects explicitely stated, trusted packages used for (de-)serialization
+    System.setProperty("org.apache.avro.SERIALIZABLE_PACKAGES", "org.apache.hadoop.io.Text");
     AvroTestUtil.testReflect
             (new Text("foo"),
                     "{\"type\":\"string\",\"java-class\":\"org.apache.hadoop.io.Text\"}");