diff --git a/tests/test_utils_sendmail.py b/tests/test_utils_sendmail.py
index c21d20f27..cf60edca5 100644
--- a/tests/test_utils_sendmail.py
+++ b/tests/test_utils_sendmail.py
@@ -25,7 +25,7 @@ def test_sendmail_mime_format_to_file():
     try:
         # Send message
         sendmail(
-            to_addr=f"| tee {tmp_path}",
+            to_addr=f"| cat > {tmp_path}",
             from_addr=from_addr,
             subject=subject,
             body=body
@@ -37,7 +37,7 @@ def test_sendmail_mime_format_to_file():
 
         # Expected message
         msg = MIMEText(body)
-        msg["To"] = f"| tee {tmp_path}"
+        msg["To"] = f"| cat > {tmp_path}"
         msg["From"] = from_addr
         msg["Subject"] = subject
         expected = msg.as_string()