diff --git a/tests/validation/reference/ChannelExtract.cpp b/tests/validation/reference/ChannelExtract.cpp
index 6f17fc0..fc7ae7d 100644
--- a/tests/validation/reference/ChannelExtract.cpp
+++ b/tests/validation/reference/ChannelExtract.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018 ARM Limited.
+ * Copyright (c) 2017-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -61,7 +61,7 @@
             const auto *src_pixel = reinterpret_cast<const T *>(src(src_coord));
             auto       *dst_pixel = reinterpret_cast<T *>(dst(dst_coord));
 
-            dst_pixel[0] = src_pixel[channel_idx];
+            dst_pixel[0] = src_pixel[channel_idx]; // NOLINT
         }
     }
 
diff --git a/tests/validation/reference/ColorConvertHelper.h b/tests/validation/reference/ColorConvertHelper.h
index b2ae6f2..abd1f5d 100644
--- a/tests/validation/reference/ColorConvertHelper.h
+++ b/tests/validation/reference/ColorConvertHelper.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018 ARM Limited.
+ * Copyright (c) 2017-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -9,14 +9,14 @@
  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  * sell copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
- *asymm_int_mult
+ *
  * The above copyright notice and this permission notice shall be included in all
  * copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, asymm_int_multDAMAGES OR OTHER
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
@@ -70,7 +70,7 @@
             auto       *gvec_pixel = reinterpret_cast<T *>(gvec(vec_coord));
             auto       *bvec_pixel = reinterpret_cast<T *>(bvec(vec_coord));
 
-            rvec_pixel[0] = src_pixel[0];
+            rvec_pixel[0] = src_pixel[0]; // NOLINT
             gvec_pixel[0] = src_pixel[1];
             bvec_pixel[0] = src_pixel[2];
         }
diff --git a/tests/validation/reference/PixelWiseMultiplication.cpp b/tests/validation/reference/PixelWiseMultiplication.cpp
index ea058ec..7dc32d0 100644
--- a/tests/validation/reference/PixelWiseMultiplication.cpp
+++ b/tests/validation/reference/PixelWiseMultiplication.cpp
@@ -128,7 +128,8 @@
 } // namespace
 
 template <typename T1, typename T2>
-SimpleTensor<T2> pixel_wise_multiplication(const SimpleTensor<T1> &src1, const SimpleTensor<T2> &src2, float scale, ConvertPolicy convert_policy, RoundingPolicy rounding_policy, QuantizationInfo qout)
+SimpleTensor<T2> pixel_wise_multiplication(const SimpleTensor<T1> &src1, const SimpleTensor<T2> &src2, float scale, ConvertPolicy convert_policy, RoundingPolicy rounding_policy,
+                                           const QuantizationInfo &qout)
 {
     ARM_COMPUTE_UNUSED(qout);
 
@@ -150,7 +151,7 @@
 
 template <>
 SimpleTensor<uint8_t> pixel_wise_multiplication(const SimpleTensor<uint8_t> &src1, const SimpleTensor<uint8_t> &src2, float scale, ConvertPolicy convert_policy, RoundingPolicy rounding_policy,
-                                                QuantizationInfo qout)
+                                                const QuantizationInfo &qout)
 {
     SimpleTensor<uint8_t> dst(TensorShape::broadcast_shape(src1.shape(), src2.shape()), src2.data_type(), 1, qout);
 
@@ -177,10 +178,10 @@
 }
 // *INDENT-OFF*
 // clang-format off
-template SimpleTensor<int16_t> pixel_wise_multiplication(const SimpleTensor<uint8_t> &src1, const SimpleTensor<int16_t> &src2, float scale, ConvertPolicy convert_policy, RoundingPolicy rounding_policy, QuantizationInfo qout);
-template SimpleTensor<int16_t> pixel_wise_multiplication(const SimpleTensor<int16_t> &src1, const SimpleTensor<int16_t> &src2, float scale, ConvertPolicy convert_policy, RoundingPolicy rounding_policy, QuantizationInfo qout);
-template SimpleTensor<float> pixel_wise_multiplication(const SimpleTensor<float> &src1, const SimpleTensor<float> &src2, float scale, ConvertPolicy convert_policy, RoundingPolicy rounding_policy, QuantizationInfo qout);
-template SimpleTensor<half_float::half> pixel_wise_multiplication(const SimpleTensor<half_float::half> &src1, const SimpleTensor<half_float::half> &src2, float scale, ConvertPolicy convert_policy, RoundingPolicy rounding_policy, QuantizationInfo qout);
+template SimpleTensor<int16_t> pixel_wise_multiplication(const SimpleTensor<uint8_t> &src1, const SimpleTensor<int16_t> &src2, float scale, ConvertPolicy convert_policy, RoundingPolicy rounding_policy, const QuantizationInfo &qout);
+template SimpleTensor<int16_t> pixel_wise_multiplication(const SimpleTensor<int16_t> &src1, const SimpleTensor<int16_t> &src2, float scale, ConvertPolicy convert_policy, RoundingPolicy rounding_policy, const QuantizationInfo &qout);
+template SimpleTensor<float> pixel_wise_multiplication(const SimpleTensor<float> &src1, const SimpleTensor<float> &src2, float scale, ConvertPolicy convert_policy, RoundingPolicy rounding_policy, const QuantizationInfo &qout);
+template SimpleTensor<half_float::half> pixel_wise_multiplication(const SimpleTensor<half_float::half> &src1, const SimpleTensor<half_float::half> &src2, float scale, ConvertPolicy convert_policy, RoundingPolicy rounding_policy, const QuantizationInfo &qout);
 // clang-format on
 // *INDENT-ON*
 } // namespace reference
diff --git a/tests/validation/reference/PixelWiseMultiplication.h b/tests/validation/reference/PixelWiseMultiplication.h
index 787a7b2..39d2bc7 100644
--- a/tests/validation/reference/PixelWiseMultiplication.h
+++ b/tests/validation/reference/PixelWiseMultiplication.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018 ARM Limited.
+ * Copyright (c) 2017-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -36,7 +36,7 @@
 {
 template <typename T1, typename T2>
 SimpleTensor<T2> pixel_wise_multiplication(const SimpleTensor<T1> &src1, const SimpleTensor<T2> &src2, float scale,
-                                           ConvertPolicy convert_policy, RoundingPolicy rounding_policy, QuantizationInfo qout = QuantizationInfo());
+                                           ConvertPolicy convert_policy, RoundingPolicy rounding_policy, const QuantizationInfo &qout = QuantizationInfo());
 } // namespace reference
 } // namespace validation
 } // namespace test