diff --git a/tests/use_case/asr/InferenceTestWav2Letter.cc b/tests/use_case/asr/InferenceTestWav2Letter.cc
index 1fa4092..0943db8 100644
--- a/tests/use_case/asr/InferenceTestWav2Letter.cc
+++ b/tests/use_case/asr/InferenceTestWav2Letter.cc
@@ -22,6 +22,8 @@
 #include <catch.hpp>
 #include <random>
 
+using namespace test;
+
 bool RunInference(arm::app::Model& model, const int8_t vec[], const size_t copySz)
 {
     TfLiteTensor* inputTensor = model.GetInputTensor(0);