diff --git a/tests/test_enc_passthrough.py b/tests/test_enc_passthrough.py
index 17bd6cb8aa507403e3916c1d93ac267d16e6ddd8..509f5e3c3e3e6880ee2160e7de68a4941510d398 100644
--- a/tests/test_enc_passthrough.py
+++ b/tests/test_enc_passthrough.py
@@ -33,11 +33,15 @@ Execute tests specified via a parameter file.
 """
 import pytest
 import glob
+import sys
 from pathlib import Path
 
 from tests.codec_be_on_mr_nonselection.test_param_file import run_test
 from tests.conftest import DecoderFrontend, EncoderFrontend
-from tests.constants import TESTV_DIR
+from tests.constants import TESTV_DIR, SCRIPTS_DIR
+
+sys.path.append(str(SCRIPTS_DIR))
+import prepare_combined_format_inputs
 
 NUMBER_OF_MASA_TCS = 2
 NUMBER_OF_MASA_DIRS = 2
@@ -48,6 +52,8 @@ test_dict = {}
 sim_opts = ""
 eid_opts = ""
 
+# Prepare combined formats input before building the testv_files to ensure files are created for both ref and dut.
+prepare_combined_format_inputs.main()
 testv_files = [Path(f).name for f in glob.glob(str(TESTV_DIR.joinpath("*.wav")))]
 
 # Stereo