diff --git a/tests/unit/test_ptx_runner.py b/tests/unit/test_ptx_runner.py
index 9fc9bf3b..3b843f58 100644
--- a/tests/unit/test_ptx_runner.py
+++ b/tests/unit/test_ptx_runner.py
@@ -7,7 +7,7 @@ for approach in ["arith", "nvvm_ptx", "nvvm_multiline"]:
     print(f"Testing: {approach}")
     print(f"{'='*50}")
     result = subprocess.run(
-        [sys.executable, "test_ptx_subproc.py", approach],
+        [sys.executable, "tests/unit/test_ptx_subproc.py", approach],
         capture_output=True,
         text=True,
         timeout=120,