diff --git a/tests/validation/fixtures/DirectConvolution3DFixture.h b/tests/validation/fixtures/DirectConvolution3DFixture.h
index 6aad549..e80ad2f 100644
--- a/tests/validation/fixtures/DirectConvolution3DFixture.h
+++ b/tests/validation/fixtures/DirectConvolution3DFixture.h
@@ -21,7 +21,12 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
+
+#ifndef ACL_TESTS_VALIDATION_FIXTURES_DIRECTCONVOLUTION3DFIXTURE_H
+#define ACL_TESTS_VALIDATION_FIXTURES_DIRECTCONVOLUTION3DFIXTURE_H
+
 #include "arm_compute/core/utils/misc/ShapeCalculator.h"
+#include "tests/framework/Asserts.h" // Required for ARM_COMPUTE_ASSERT
 #include "tests/framework/Fixture.h"
 #include "tests/validation/reference/ActivationLayer.h"
 #include "tests/validation/reference/Conv3D.h"
@@ -180,3 +185,5 @@
 } // namespace validation
 } // namespace test
 } // namespace arm_compute
+
+#endif // ACL_TESTS_VALIDATION_FIXTURES_DIRECTCONVOLUTION3DFIXTURE_H
diff --git a/tests/validation/fixtures/FullyConnectedLayerFixture.h b/tests/validation/fixtures/FullyConnectedLayerFixture.h
index fb1cb4d..7cfe6e4 100644
--- a/tests/validation/fixtures/FullyConnectedLayerFixture.h
+++ b/tests/validation/fixtures/FullyConnectedLayerFixture.h
@@ -21,8 +21,8 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-#ifndef ARM_COMPUTE_TEST_FULLY_CONNECTED_LAYER_FIXTURE
-#define ARM_COMPUTE_TEST_FULLY_CONNECTED_LAYER_FIXTURE
+#ifndef ACL_TESTS_VALIDATION_FIXTURES_FULLYCONNECTEDLAYERFIXTURE_H
+#define ACL_TESTS_VALIDATION_FIXTURES_FULLYCONNECTEDLAYERFIXTURE_H
 
 #include "arm_compute/core/TensorShape.h"
 #include "arm_compute/core/Types.h"
@@ -34,6 +34,7 @@
 #include "tests/framework/Asserts.h"
 #include "tests/framework/Fixture.h"
 #include "tests/validation/Helpers.h"
+#include "tests/validation/Validation.h"
 #include "tests/validation/reference/ActivationLayer.h"
 #include "tests/validation/reference/FullyConnectedLayer.h"
 #include "tests/validation/reference/Utils.h"
@@ -526,4 +527,4 @@
 } // namespace validation
 } // namespace test
 } // namespace arm_compute
-#endif /* ARM_COMPUTE_TEST_FULLY_CONNECTED_LAYER_FIXTURE */
+#endif // ACL_TESTS_VALIDATION_FIXTURES_FULLYCONNECTEDLAYERFIXTURE_H
diff --git a/tests/validation/fixtures/MatMulFixture.h b/tests/validation/fixtures/MatMulFixture.h
index e6b28f5..2e79612 100644
--- a/tests/validation/fixtures/MatMulFixture.h
+++ b/tests/validation/fixtures/MatMulFixture.h
@@ -21,14 +21,16 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-#ifndef ACL_TESTS_VALIDATION_FIXTURES_MATMULFIXTURE
-#define ACL_TESTS_VALIDATION_FIXTURES_MATMULFIXTURE
+#ifndef ACL_TESTS_VALIDATION_FIXTURES_MATMULFIXTURE_H
+#define ACL_TESTS_VALIDATION_FIXTURES_MATMULFIXTURE_H
 
 #include "arm_compute/core/Types.h"
 #include "arm_compute/core/Utils.h"
 #include "arm_compute/core/utils/quantization/AsymmHelpers.h"
 #include "src/core/utils/quantization/AsymmHelpers.h"
+#include "tests/framework/Asserts.h" // Required for ARM_COMPUTE_ASSERT
 #include "tests/framework/Fixture.h"
+#include "tests/validation/Validation.h"
 #include "tests/validation/reference/ActivationLayer.h"
 #include "tests/validation/reference/GEMM.h"
 #include "tests/validation/reference/GEMMLowp.h"
@@ -338,4 +340,4 @@
 } // namespace validation
 } // namespace test
 } // namespace arm_compute
-#endif /* ACL_TESTS_VALIDATION_FIXTURES_MATMULFIXTURE */
+#endif // ACL_TESTS_VALIDATION_FIXTURES_MATMULFIXTURE_H
diff --git a/tests/validation/fixtures/MatMulKernelFixture.h b/tests/validation/fixtures/MatMulKernelFixture.h
index 50d194c..26072df 100644
--- a/tests/validation/fixtures/MatMulKernelFixture.h
+++ b/tests/validation/fixtures/MatMulKernelFixture.h
@@ -30,8 +30,10 @@
 
 #include "tests/CL/CLAccessor.h"
 #include "tests/CL/Helper.h"
+#include "tests/framework/Asserts.h" // Required for ARM_COMPUTE_ASSERT
 #include "tests/framework/Fixture.h"
 #include "tests/validation/Helpers.h"
+#include "tests/validation/Validation.h"
 #include "tests/validation/reference/GEMM.h"
 #include "tests/validation/reference/GEMMLowp.h"
 #include "tests/validation/reference/Permute.h"
diff --git a/tests/validation/fixtures/ScaleFixture.h b/tests/validation/fixtures/ScaleFixture.h
index b00a86f..86d89d7 100644
--- a/tests/validation/fixtures/ScaleFixture.h
+++ b/tests/validation/fixtures/ScaleFixture.h
@@ -21,9 +21,10 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-#ifndef ARM_COMPUTE_TEST_SCALE_FIXTURE
-#define ARM_COMPUTE_TEST_SCALE_FIXTURE
+#ifndef ACL_TESTS_VALIDATION_FIXTURES_SCALEFIXTURE_H
+#define ACL_TESTS_VALIDATION_FIXTURES_SCALEFIXTURE_H
 
+#include "tests/framework/Asserts.h" // Required for ARM_COMPUTE_ASSERT
 #include "tests/framework/Fixture.h"
 #include "tests/validation/reference/Permute.h"
 #include "tests/validation/reference/Scale.h"
@@ -266,4 +267,4 @@
 } // namespace validation
 } // namespace test
 } // namespace arm_compute
-#endif /* ARM_COMPUTE_TEST_SCALE_FIXTURE */
+#endif // ACL_TESTS_VALIDATION_FIXTURES_SCALEFIXTURE_H