diff --git a/test/test_gridfs.py b/test/test_gridfs.py
index 35a574a1d..cfa6e43e8 100644
--- a/test/test_gridfs.py
+++ b/test/test_gridfs.py
@@ -47,7 +47,7 @@ class JustWrite(threading.Thread):
         threading.Thread.__init__(self)
         self.fs = fs
         self.n = n
-        self.setDaemon(True)
+        self.daemon = True
 
     def run(self):
         for _ in range(self.n):
@@ -62,7 +62,7 @@ class JustRead(threading.Thread):
         self.fs = fs
         self.n = n
         self.results = results
-        self.setDaemon(True)
+        self.daemon = True
 
     def run(self):
         for _ in range(self.n):
diff --git a/test/test_gridfs_bucket.py b/test/test_gridfs_bucket.py
index d9bf0cf05..b6a33b4ec 100644
--- a/test/test_gridfs_bucket.py
+++ b/test/test_gridfs_bucket.py
@@ -44,7 +44,7 @@ class JustWrite(threading.Thread):
         threading.Thread.__init__(self)
         self.gfs = gfs
         self.num = num
-        self.setDaemon(True)
+        self.daemon = True
 
     def run(self):
         for _ in range(self.num):
@@ -59,7 +59,7 @@ class JustRead(threading.Thread):
         self.gfs = gfs
         self.num = num
         self.results = results
-        self.setDaemon(True)
+        self.daemon = True
 
     def run(self):
         for _ in range(self.num):
diff --git a/test/test_threads.py b/test/test_threads.py
index 2c73de52e..899392e1a 100644
--- a/test/test_threads.py
+++ b/test/test_threads.py
@@ -30,7 +30,7 @@ class AutoAuthenticateThreads(threading.Thread):
         self.coll = collection
         self.num = num
         self.success = False
-        self.setDaemon(True)
+        self.daemon = True
 
     def run(self):
         for i in range(self.num):
@@ -44,7 +44,7 @@ class SaveAndFind(threading.Thread):
     def __init__(self, collection):
         threading.Thread.__init__(self)
         self.collection = collection
-        self.setDaemon(True)
+        self.daemon = True
         self.passed = False
 
     def run(self):
@@ -62,7 +62,7 @@ class Insert(threading.Thread):
         self.collection = collection
         self.n = n
         self.expect_exception = expect_exception
-        self.setDaemon(True)
+        self.daemon = True
 
     def run(self):
         for _ in range(self.n):
@@ -85,7 +85,7 @@ class Update(threading.Thread):
         self.collection = collection
         self.n = n
         self.expect_exception = expect_exception
-        self.setDaemon(True)
+        self.daemon = True
 
     def run(self):
         for _ in range(self.n):
diff --git a/test/utils_spec_runner.py b/test/utils_spec_runner.py
index 8528ecb8c..425242090 100644
--- a/test/utils_spec_runner.py
+++ b/test/utils_spec_runner.py
@@ -52,7 +52,7 @@ class SpecRunnerThread(threading.Thread):
         super(SpecRunnerThread, self).__init__()
         self.name = name
         self.exc = None
-        self.setDaemon(True)
+        self.daemon = True
         self.cond = threading.Condition()
         self.ops = []
         self.stopped = False