diff --git a/packager/media/filters/ec3_audio_util_unittest.cc b/packager/media/filters/ec3_audio_util_unittest.cc
index d1b7d2b375..64d3029198 100644
--- a/packager/media/filters/ec3_audio_util_unittest.cc
+++ b/packager/media/filters/ec3_audio_util_unittest.cc
@@ -6,6 +6,7 @@
 
 #include <gtest/gtest.h>
 
+#include "packager/base/macros.h"
 #include "packager/media/filters/ec3_audio_util.h"
 
 namespace edash_packager {
@@ -14,18 +15,22 @@ namespace media {
 TEST(EC3AudioUtilTest, CalculateEC3ChannelMapTest1) {
   // audio_coding_mode is 7, which is Left, Center, Right, Left surround, Right
   // surround. No dependent substreams. LFE channel on.
-  const std::vector<uint8_t> ec3_data = {0, 0, 0, 0x0f, 0};
+  const uint8_t kEc3Data[] = {0, 0, 0, 0x0f, 0};
   uint32_t channel_map;
-  EXPECT_TRUE(CalculateEC3ChannelMap(ec3_data, &channel_map));
+  EXPECT_TRUE(CalculateEC3ChannelMap(
+      std::vector<uint8_t>(kEc3Data, kEc3Data + arraysize(kEc3Data)),
+      &channel_map));
   EXPECT_EQ(0xF801u, channel_map);
 }
 
 TEST(EC3AudioUtilTest, CalculateEC3ChannelMapTest2) {
   // audio_coding_mode is 2, which is Left and Right. No dependent substreams.
   // LFE channel off.
-  const std::vector<uint8_t> ec3_data = {0, 0, 0, 0x04, 0};
+  const uint8_t kEc3Data[] = {0, 0, 0, 0x04, 0};
   uint32_t channel_map;
-  EXPECT_TRUE(CalculateEC3ChannelMap(ec3_data, &channel_map));
+  EXPECT_TRUE(CalculateEC3ChannelMap(
+      std::vector<uint8_t>(kEc3Data, kEc3Data + arraysize(kEc3Data)),
+      &channel_map));
   EXPECT_EQ(0xA000u, channel_map);
 }
 
@@ -33,9 +38,11 @@ TEST(EC3AudioUtilTest, CalculateEC3ChannelMapTest3) {
   // audio_coding_mode is 3, which is Left, Center, and Right. Dependent
   // substreams layout is 0b100000011, which is Left center/ Right center pair,
   // Left rear surround/ Right rear surround pair, LFE2 on. LFE channel on.
-  const std::vector<uint8_t> ec3_data = {0, 0, 0, 0x07, 0x07, 0x03};
+  const uint8_t kEc3Data[] = {0, 0, 0, 0x07, 0x07, 0x03};
   uint32_t channel_map;
-  EXPECT_TRUE(CalculateEC3ChannelMap(ec3_data, &channel_map));
+  EXPECT_TRUE(CalculateEC3ChannelMap(
+      std::vector<uint8_t>(kEc3Data, kEc3Data + arraysize(kEc3Data)),
+      &channel_map));
   EXPECT_EQ(0xE603u, channel_map);
 }