diff --git a/octue/utils/files.py b/octue/utils/files.py
index 3d7139842..d3260ce74 100644
--- a/octue/utils/files.py
+++ b/octue/utils/files.py
@@ -1,6 +1,10 @@
+import logging
 import tempfile
 
 
+logger = logging.getLogger(__name__)
+
+
 temporary_directories = []
 
 
@@ -10,3 +14,4 @@ class RegisteredTemporaryDirectory(tempfile.TemporaryDirectory):
     def __init__(self, suffix=None, prefix=None, dir=None, ignore_cleanup_errors=False):
         super().__init__(suffix=suffix, prefix=prefix, dir=dir, ignore_cleanup_errors=ignore_cleanup_errors)
         temporary_directories.append(self)
+        logger.warning("DIAGNOSTICS! Using temporary directory %r.", self.name)