diff --git a/swh/loader/svn/loader.py b/swh/loader/svn/loader.py
--- a/swh/loader/svn/loader.py
+++ b/swh/loader/svn/loader.py
@@ -641,7 +641,11 @@
             check_revision=check_revision,
             max_content_size=max_content_size,
         )
-        self.temp_dir = tempfile.mkdtemp(dir=self.temp_directory)
+        self.temp_dir = tempfile.mkdtemp(
+            dir=self.temp_directory,
+            prefix=TEMPORARY_DIR_PREFIX_PATTERN,
+            suffix="-%s" % os.getpid(),
+        )
         self.repo_path = None
         self.truncated_dump = False