diff --git a/packages/qvac-lib-infer-onnx-tts/addon/test/unit/CMakeLists.txt b/packages/qvac-lib-infer-onnx-tts/addon/test/unit/CMakeLists.txt
index a32a11e6b2..948c70ce59 100644
--- a/packages/qvac-lib-infer-onnx-tts/addon/test/unit/CMakeLists.txt
+++ b/packages/qvac-lib-infer-onnx-tts/addon/test/unit/CMakeLists.txt
@@ -11,6 +11,7 @@ target_sources(
   PRIVATE
     ${CMAKE_SOURCE_DIR}/addon/src/model-interface/PiperEngine.cpp
     ${CMAKE_SOURCE_DIR}/addon/src/model-interface/TTSModel.cpp
+    ${CMAKE_SOURCE_DIR}/addon/src/model-interface/TashkeelDiacritizer.cpp
     ${TEST_SOURCES}
     ${TEST_MOCKS}
 )
diff --git a/packages/qvac-lib-infer-onnx-tts/addon/test/unit/src/PiperEngineTest.cpp b/packages/qvac-lib-infer-onnx-tts/addon/test/unit/src/PiperEngineTest.cpp
index b88af39cb5..f218e0d77a 100644
--- a/packages/qvac-lib-infer-onnx-tts/addon/test/unit/src/PiperEngineTest.cpp
+++ b/packages/qvac-lib-infer-onnx-tts/addon/test/unit/src/PiperEngineTest.cpp
@@ -12,17 +12,17 @@ class PiperEngineTest : public ::testing::Test {
   const std::filesystem::path configJsonPath_ = basePath_ / "en_US-amy-low.onnx.json";
 
   TTSConfig validConfig_ {
-    modelPath_.string(), configJsonPath_.string(), "en", eSpeakDataPath_.string(), false
+    modelPath_.string(), configJsonPath_.string(), "en", eSpeakDataPath_.string(), "", false
   };
 
   TTSConfig emptyConfig_ {};
 
   TTSConfig invalidModelPathConfig_ {
-    "invalid", configJsonPath_.string(), "en", eSpeakDataPath_.string(), false
+    "invalid", configJsonPath_.string(), "en", eSpeakDataPath_.string(), "", false
   };
 
   TTSConfig invalidConfigJsonPathConfig_ {
-    modelPath_.string(), "invalid", "en", eSpeakDataPath_.string(), false
+    modelPath_.string(), "invalid", "en", eSpeakDataPath_.string(), "", false
   };
 
 };