diff --git a/run.py b/run.py
index 3231cc7..5b8827e 100644
--- a/run.py
+++ b/run.py
@@ -7,10 +7,8 @@
 
 import argparse
 import copy
-import os
 import subprocess
 import sys
-import tempfile
 from typing import List
 
 from tritonbench.operator_loader import load_opbench_by_name_from_loader
@@ -36,6 +34,7 @@ def _run_in_task(op: str) -> None:
     copy_sys_argv = copy.deepcopy(sys.argv)
     copy_sys_argv = remove_cmd_parameter(copy_sys_argv, "--op")
     copy_sys_argv = remove_cmd_parameter(copy_sys_argv, "--isolate")
+    copy_sys_argv = remove_cmd_parameter(copy_sys_argv, "--op-collection")
     add_cmd_parameter(copy_sys_argv, "--op", op)
     op_task_cmd.extend(copy_sys_argv)
     try:
@@ -117,6 +116,10 @@ def run(args: List[str] = []):
     else:
         ops = list_operators_by_collection(args.op_collection)
 
+    # Force isolation in subprocess if testing more than one op.
+    if len(ops) >= 2:
+        args.isolate = True
+
     with gpu_lockdown(args.gpu_lockdown):
         for op in ops:
             args.op = op