diff --git a/atroposlib/tests/api_test_utils.py b/atroposlib/tests/api_test_utils.py
index c88d51f2..200ada8c 100644
--- a/atroposlib/tests/api_test_utils.py
+++ b/atroposlib/tests/api_test_utils.py
@@ -1,4 +1,5 @@
 import subprocess
+import sys
 import time
 
 import requests
@@ -16,7 +17,7 @@ def launch_api_for_testing(max_wait_for_api: int = 10) -> subprocess.Popen:
     # Use subprocess instead of multiprocessing to avoid inheriting pytest args
     api_proc = subprocess.Popen(
         [
-            "python",
+            sys.executable,
             "-m",
             "atroposlib.cli.run_api",
             "--host",
diff --git a/atroposlib/tests/test_api_compression.py b/atroposlib/tests/test_api_compression.py
index 25cbdfe0..0202c3ad 100644
--- a/atroposlib/tests/test_api_compression.py
+++ b/atroposlib/tests/test_api_compression.py
@@ -5,6 +5,7 @@ import json
 import os
 import signal
 import subprocess
+import sys
 import time
 
 import pytest
@@ -27,7 +28,7 @@ def wait_for_api_server(max_wait=10):
 def api_server():
     proc = subprocess.Popen(
         [
-            "python",
+            sys.executable,
             "-m",
             "atroposlib.cli.run_api",
             "--host",
diff --git a/atroposlib/tests/test_api_messages_handling.py b/atroposlib/tests/test_api_messages_handling.py
index 0f7ac922..228be3ea 100644
--- a/atroposlib/tests/test_api_messages_handling.py
+++ b/atroposlib/tests/test_api_messages_handling.py
@@ -5,6 +5,7 @@ Tests for API server message handling, particularly for SFT (Supervised Fine-Tun
 import os
 import signal
 import subprocess
+import sys
 import time
 
 import pytest
@@ -30,7 +31,7 @@ def api_server():
     # Start the API server as a subprocess
     proc = subprocess.Popen(
         [
-            "python",
+            sys.executable,
             "-m",
             "atroposlib.cli.run_api",
             "--host",