diff --git a/tests/split_rendering/utils.py b/tests/split_rendering/utils.py
index f2125bcc909b528b355d26f5063dca8b3aa9da9c..ca7a5143c581d181f895fed3914c6a3a760484f1 100644
--- a/tests/split_rendering/utils.py
+++ b/tests/split_rendering/utils.py
@@ -260,7 +260,7 @@ def run_full_chain_split_rendering(
         run_ivas_isar_enc_cmd(enc_cmd)
 
         if delay_profile:
-            rtp_bitstream = ivas_bitstream.with_suffix(".rtpg192")
+            rtp_bitstream = ivas_bitstream.with_suffix(".netsimout")
             netsim_cmd = [
                 str(TOOLS_DIR / f"networkSimulator_g192{EXE_SUFFIX}"),
                 str(delay_profile),