diff --git a/python/cuopt_server/cuopt_server/tests/test_bill_logging.py b/python/cuopt_server/cuopt_server/tests/test_bill_logging.py
index bd41b48ca..199e6d1b1 100644
--- a/python/cuopt_server/cuopt_server/tests/test_bill_logging.py
+++ b/python/cuopt_server/cuopt_server/tests/test_bill_logging.py
@@ -1,7 +1,8 @@
-# SPDX-FileCopyrightText: Copyright (c) 2023-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-FileCopyrightText: Copyright (c) 2023-2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 
 import json
+import os
 import platform
 import shutil
 import signal
@@ -29,16 +30,12 @@ def test_time_limit_logs():
     )
     dataset = json.load(open(dataset_path))
     client = RequestClient(port=5010)
-    env = {
-        "CUOPT_SERVER_IP": "127.0.0.1",
-        "CUOPT_SERVER_PORT": "5010",
-        "CUOPT_SERVER_LOG_LEVEL": "debug",
-        "CUOPT_MAX_SOLVE_TIME_LIMIT": "5",
-    }
+    env = os.environ.copy()
+    env["CUOPT_MAX_SOLVE_TIME_LIMIT"] = "5"
 
     url = "/cuopt/"
 
-    cmd = python_path + " " + server_script
+    cmd = python_path + " " + server_script + " -i 127.0.0.1 -p 5010 -l debug"
     process = pexpect.spawn(cmd, env=env)
 
     try:
diff --git a/python/cuopt_server/cuopt_server/tests/test_server_health.py b/python/cuopt_server/cuopt_server/tests/test_server_health.py
index e6c12866c..06d16e0b8 100644
--- a/python/cuopt_server/cuopt_server/tests/test_server_health.py
+++ b/python/cuopt_server/cuopt_server/tests/test_server_health.py
@@ -1,6 +1,7 @@
-# SPDX-FileCopyrightText: Copyright (c) 2023-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-FileCopyrightText: Copyright (c) 2023-2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 
+import os
 import shutil
 
 import pexpect
@@ -18,11 +19,14 @@
 def test_server_health(args):
     env = None
     if args == "env":
-        env = {
-            "CUOPT_SERVER_IP": "127.0.0.1",
-            "CUOPT_SERVER_PORT": "5001",
-            "CUOPT_SERVER_LOG_LEVEL": "error",
-        }
+        env = os.environ.copy()
+        env.update(
+            {
+                "CUOPT_SERVER_IP": "127.0.0.1",
+                "CUOPT_SERVER_PORT": "5001",
+                "CUOPT_SERVER_LOG_LEVEL": "error",
+            }
+        )
         url = (
             "http://"
             + env["CUOPT_SERVER_IP"]
diff --git a/python/cuopt_server/cuopt_server/tests/utils/utils.py b/python/cuopt_server/cuopt_server/tests/utils/utils.py
index 8252e6d9c..022f5aac8 100644
--- a/python/cuopt_server/cuopt_server/tests/utils/utils.py
+++ b/python/cuopt_server/cuopt_server/tests/utils/utils.py
@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: Copyright (c) 2022-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-FileCopyrightText: Copyright (c) 2022-2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 
 import os
@@ -315,12 +315,19 @@ def spinup_wait():
 @pytest.fixture(scope="session")
 def cuoptproc(request):
     global cuoptmain
-    env = {
-        "CUOPT_SERVER_IP": "0.0.0.0",
-        "CUOPT_SERVER_PORT": "5555",
-        "CUOPT_SERVER_LOG_LEVEL": "debug",
-    }
-    cuoptmain = Popen([python_path, server_script, server_module], env=env)
+    cuoptmain = Popen(
+        [
+            python_path,
+            server_script,
+            server_module,
+            "-i",
+            "0.0.0.0",
+            "-p",
+            "5555",
+            "-l",
+            "debug",
+        ]
+    )
     spinup_wait()
 
     def shutdown():