diff --git a/test/api/test_yuv_to_rgb.cpp b/test/api/test_yuv_to_rgb.cpp
index ded75ec26ffce5fa4a3c55e95e8bf86d6c923ded..5e7bae8925ed62bdde1032b97cda100ed4108da6 100644
--- a/test/api/test_yuv_to_rgb.cpp
+++ b/test/api/test_yuv_to_rgb.cpp
@@ -54,6 +54,7 @@ class YuvTest final {
 
     test::Array2D<uint8_t> expected{logical_width * channel_number_,
                                     input_y.height(), padding};
+    expected.fill(0);
     calculate_expected(input_y, input_uv, expected, is_nv21);
 
     test::Array2D<uint8_t> actual{logical_width * channel_number_,
diff --git a/test/framework/test_array2d.cpp b/test/framework/test_array2d.cpp
index cc5a9d50e489d03bd7d4adf1950ff74fcc1f808c..b3114ea0a60d090812de0fb0bf92ee24e6f178c2 100644
--- a/test/framework/test_array2d.cpp
+++ b/test/framework/test_array2d.cpp
@@ -28,6 +28,7 @@ TEST(Array2D, DefaultConstructor) {
 TEST(Array2D, Constructor) {
   size_t width = 5, height = 5;
   test::Array2D<uint32_t> array_1{width, height};
+  array_1.fill(0);
   EXPECT_EQ(array_1.width(), width);
   EXPECT_EQ(array_1.height(), height);
   EXPECT_EQ(array_1.channels(), 1);
@@ -35,6 +36,7 @@ TEST(Array2D, Constructor) {
   EXPECT_TRUE(array_1.valid());
 
   test::Array2D<uint32_t> array_2{width, height};
+  array_2.fill(0);
   EXPECT_EQ_ARRAY2D(array_1, array_2);
 }