diff --git a/ultralytics/engine/tuner.py b/ultralytics/engine/tuner.py
index 0330abb8..336e62dc 100644
--- a/ultralytics/engine/tuner.py
+++ b/ultralytics/engine/tuner.py
@@ -191,7 +191,7 @@ class Tuner:
             try:
                 # Train YOLO model with mutated hyperparameters (run in subprocess to avoid dataloader hang)
                 cmd = ["yolo", "train", *(f"{k}={v}" for k, v in train_args.items())]
-                return_code = subprocess.run(cmd, check=True).returncode
+                return_code = subprocess.run(" ".join(cmd), check=True, shell=True).returncode
                 ckpt_file = weights_dir / ("best.pt" if (weights_dir / "best.pt").exists() else "last.pt")
                 metrics = torch.load(ckpt_file)["train_metrics"]
                 assert return_code == 0, "training failed"