diff --git a/python/pyspark/testing/connectutils.py b/python/pyspark/testing/connectutils.py
index 191505741eb4..e1ca681e93b2 100644
--- a/python/pyspark/testing/connectutils.py
+++ b/python/pyspark/testing/connectutils.py
@@ -170,6 +170,8 @@ def conf(cls):
         conf = SparkConf(loadDefaults=False)
         # Make the server terminate reattachable streams every 1 second and 123 bytes,
         # to make the tests exercise reattach.
+        if conf._jconf is not None:
+            conf._jconf.remove("spark.master")
         conf.set("spark.connect.execute.reattachable.senderMaxStreamDuration", "1s")
         conf.set("spark.connect.execute.reattachable.senderMaxStreamSize", "123")
         return conf