diff --git a/unit_test/unit_test.cc b/unit_test/unit_test.cc
index c6febf87e..f5aeac543 100644
--- a/unit_test/unit_test.cc
+++ b/unit_test/unit_test.cc
@@ -36,7 +36,7 @@ DEFINE_int32(libyuv_cpu_info, -1,
 
 LibYUVConvertTest::LibYUVConvertTest() :
     benchmark_iterations_(BENCHMARK_ITERATIONS), benchmark_width_(130),
-    benchmark_height_(72), disable_cpu_flags_(0), benchmark_cpu_info_(-1) {
+    benchmark_height_(72), disable_cpu_flags_(1), benchmark_cpu_info_(-1) {
   const char* repeat = getenv("LIBYUV_REPEAT");
   if (repeat) {
     benchmark_iterations_ = atoi(repeat);  // NOLINT
@@ -88,7 +88,7 @@ LibYUVConvertTest::LibYUVConvertTest() :
 
 LibYUVColorTest::LibYUVColorTest() :
     benchmark_iterations_(BENCHMARK_ITERATIONS), benchmark_width_(128),
-    benchmark_height_(72), disable_cpu_flags_(0), benchmark_cpu_info_(-1) {
+    benchmark_height_(72), disable_cpu_flags_(1), benchmark_cpu_info_(-1) {
   const char* repeat = getenv("LIBYUV_REPEAT");
   if (repeat) {
     benchmark_iterations_ = atoi(repeat);  // NOLINT
@@ -140,7 +140,7 @@ LibYUVColorTest::LibYUVColorTest() :
 
 LibYUVScaleTest::LibYUVScaleTest() :
     benchmark_iterations_(BENCHMARK_ITERATIONS), benchmark_width_(128),
-    benchmark_height_(72), disable_cpu_flags_(0), benchmark_cpu_info_(-1) {
+    benchmark_height_(72), disable_cpu_flags_(1), benchmark_cpu_info_(-1) {
   const char* repeat = getenv("LIBYUV_REPEAT");
   if (repeat) {
     benchmark_iterations_ = atoi(repeat);  // NOLINT
@@ -192,7 +192,7 @@ LibYUVScaleTest::LibYUVScaleTest() :
 
 LibYUVRotateTest::LibYUVRotateTest() :
     benchmark_iterations_(BENCHMARK_ITERATIONS), benchmark_width_(128),
-    benchmark_height_(72), disable_cpu_flags_(0), benchmark_cpu_info_(-1) {
+    benchmark_height_(72), disable_cpu_flags_(1), benchmark_cpu_info_(-1) {
   const char* repeat = getenv("LIBYUV_REPEAT");
   if (repeat) {
     benchmark_iterations_ = atoi(repeat);  // NOLINT
@@ -244,7 +244,7 @@ LibYUVRotateTest::LibYUVRotateTest() :
 
 LibYUVPlanarTest::LibYUVPlanarTest() :
     benchmark_iterations_(BENCHMARK_ITERATIONS), benchmark_width_(128),
-    benchmark_height_(72), disable_cpu_flags_(0), benchmark_cpu_info_(-1) {
+    benchmark_height_(72), disable_cpu_flags_(1), benchmark_cpu_info_(-1) {
   const char* repeat = getenv("LIBYUV_REPEAT");
   if (repeat) {
     benchmark_iterations_ = atoi(repeat);  // NOLINT
@@ -296,7 +296,7 @@ LibYUVPlanarTest::LibYUVPlanarTest() :
 
 LibYUVBaseTest::LibYUVBaseTest() :
     benchmark_iterations_(BENCHMARK_ITERATIONS), benchmark_width_(128),
-    benchmark_height_(72), disable_cpu_flags_(0), benchmark_cpu_info_(-1) {
+    benchmark_height_(72), disable_cpu_flags_(1), benchmark_cpu_info_(-1) {
   const char* repeat = getenv("LIBYUV_REPEAT");
   if (repeat) {
     benchmark_iterations_ = atoi(repeat);  // NOLINT
diff --git a/unit_test/unit_test.h b/unit_test/unit_test.h
index dd8e4516e..f816ec711 100644
--- a/unit_test/unit_test.h
+++ b/unit_test/unit_test.h
@@ -81,7 +81,7 @@ class LibYUVColorTest : public ::testing::Test {
   int benchmark_height_;  // Default 720.  Use 360 for benchmarking VGA.
   int benchmark_pixels_div256_;  // Total pixels to benchmark / 256.
   int benchmark_pixels_div1280_;  // Total pixels to benchmark / 1280.
-  int disable_cpu_flags_;  // Default 0.  Use -1 for benchmarking.
+  int disable_cpu_flags_;  // Default 1.  Use -1 for benchmarking.
   int benchmark_cpu_info_;  // Default -1.  Use 1 to disable SIMD.
 };
 
@@ -94,7 +94,7 @@ class LibYUVConvertTest : public ::testing::Test {
   int benchmark_height_;  // Default 720.  Use 360 for benchmarking VGA.
   int benchmark_pixels_div256_;  // Total pixels to benchmark / 256.
   int benchmark_pixels_div1280_;  // Total pixels to benchmark / 1280.
-  int disable_cpu_flags_;  // Default 0.  Use -1 for benchmarking.
+  int disable_cpu_flags_;  // Default 1.  Use -1 for benchmarking.
   int benchmark_cpu_info_;  // Default -1.  Use 1 to disable SIMD.
 };
 
@@ -107,7 +107,7 @@ class LibYUVScaleTest : public ::testing::Test {
   int benchmark_height_;  // Default 720.  Use 360 for benchmarking VGA.
   int benchmark_pixels_div256_;  // Total pixels to benchmark / 256.
   int benchmark_pixels_div1280_;  // Total pixels to benchmark / 1280.
-  int disable_cpu_flags_;  // Default 0.  Use -1 for benchmarking.
+  int disable_cpu_flags_;  // Default 1.  Use -1 for benchmarking.
   int benchmark_cpu_info_;  // Default -1.  Use 1 to disable SIMD.
 };
 
@@ -120,7 +120,7 @@ class LibYUVRotateTest : public ::testing::Test {
   int benchmark_height_;  // Default 720.  Use 360 for benchmarking VGA.
   int benchmark_pixels_div256_;  // Total pixels to benchmark / 256.
   int benchmark_pixels_div1280_;  // Total pixels to benchmark / 1280.
-  int disable_cpu_flags_;  // Default 0.  Use -1 for benchmarking.
+  int disable_cpu_flags_;  // Default 1.  Use -1 for benchmarking.
   int benchmark_cpu_info_;  // Default -1.  Use 1 to disable SIMD.
 };
 
@@ -133,7 +133,7 @@ class LibYUVPlanarTest : public ::testing::Test {
   int benchmark_height_;  // Default 720.  Use 360 for benchmarking VGA.
   int benchmark_pixels_div256_;  // Total pixels to benchmark / 256.
   int benchmark_pixels_div1280_;  // Total pixels to benchmark / 1280.
-  int disable_cpu_flags_;  // Default 0.  Use -1 for benchmarking.
+  int disable_cpu_flags_;  // Default 1.  Use -1 for benchmarking.
   int benchmark_cpu_info_;  // Default -1.  Use 1 to disable SIMD.
 };
 
@@ -146,7 +146,7 @@ class LibYUVBaseTest : public ::testing::Test {
   int benchmark_height_;  // Default 720.  Use 360 for benchmarking VGA.
   int benchmark_pixels_div256_;  // Total pixels to benchmark / 256.
   int benchmark_pixels_div1280_;  // Total pixels to benchmark / 1280.
-  int disable_cpu_flags_;  // Default 0.  Use -1 for benchmarking.
+  int disable_cpu_flags_;  // Default 1.  Use -1 for benchmarking.
   int benchmark_cpu_info_;  // Default -1.  Use 1 to disable SIMD.
 };