diff --git a/tests/cts/net/src/android/net/cts/TunUtils.java b/tests/cts/net/src/android/net/cts/TunUtils.java
index adaba9d398..7887385234 100644
--- a/tests/cts/net/src/android/net/cts/TunUtils.java
+++ b/tests/cts/net/src/android/net/cts/TunUtils.java
@@ -47,7 +47,7 @@ public class TunUtils {
     protected static final int IP6_PROTO_OFFSET = 6;
 
     private static final int DATA_BUFFER_LEN = 4096;
-    private static final int TIMEOUT = 1000;
+    private static final int TIMEOUT = 2000;
 
     private final List<byte[]> mPackets = new ArrayList<>();
     private final ParcelFileDescriptor mTunFd;