diff --git a/test/basetest/task.py b/test/basetest/task.py
index 72286f22d..501e84df6 100644
--- a/test/basetest/task.py
+++ b/test/basetest/task.py
@@ -31,7 +31,7 @@ class Task(object):
 
         # Configuration of the isolated environment
         self._original_pwd = os.getcwd()
-        self.datadir = tempfile.mkdtemp()
+        self.datadir = tempfile.mkdtemp(prefix="task_")
         self.taskrc = os.path.join(self.datadir, "test.rc")
 
         # Ensure any instance is properly destroyed at session end
diff --git a/test/basetest/taskd.py b/test/basetest/taskd.py
index 7616d7d39..c67ff3a6d 100644
--- a/test/basetest/taskd.py
+++ b/test/basetest/taskd.py
@@ -50,7 +50,7 @@ class Taskd(object):
 
         # Will hold the taskd subprocess if it's running
         self.proc = None
-        self.datadir = tempfile.mkdtemp()
+        self.datadir = tempfile.mkdtemp(prefix="taskd_")
         self.tasklog = os.path.join(self.datadir, "taskd.log")
         self.taskpid = os.path.join(self.datadir, "taskd.pid")