diff --git a/media/base/aes_encryptor_unittest.cc b/media/base/aes_encryptor_unittest.cc
index 4629271e17..261aa8a3ee 100644
--- a/media/base/aes_encryptor_unittest.cc
+++ b/media/base/aes_encryptor_unittest.cc
@@ -60,7 +60,7 @@ const uint8 kSubsampleTest2[] = {13, 51};
 const uint8 kSubsampleTest3[] = {52, 12};
 const uint8 kSubsampleTest4[] = {16, 48};
 const uint8 kSubsampleTest5[] = {3, 16, 45};
-const uint8 kSubsampleTest6[] = {18, 16, 34};
+const uint8 kSubsampleTest6[] = {18, 12, 34};
 const uint8 kSubsampleTest7[] = {8, 16, 2, 38};
 const uint8 kSubsampleTest8[] = {10, 1, 33, 20};
 const uint8 kSubsampleTest9[] = {7, 19, 6, 32};