diff --git a/pytests/test_pytensoroperator.py b/pytests/test_pytensoroperator.py
index caec04df5..02a3431a4 100644
--- a/pytests/test_pytensoroperator.py
+++ b/pytests/test_pytensoroperator.py
@@ -1,4 +1,5 @@
 import os
+import platform
 
 import numpy as np
 import pytest
@@ -12,6 +13,10 @@
 if pytensor_message is None:
     import pytensor
 
+    # avoid compile error on mac
+    if platform.system() == "Darwin":
+        pytensor.config.gcc__cxxflags = "-Wno-c++11-narrowing"
+
 
 par1 = {"ny": 11, "nx": 11, "dtype": np.float32}  # square
 par2 = {"ny": 21, "nx": 11, "dtype": np.float32}  # overdetermined