diff --git a/tests/python/bl_bundled_modules.py b/tests/python/bl_bundled_modules.py
index 4602e87916e..0c0755ea6cb 100644
--- a/tests/python/bl_bundled_modules.py
+++ b/tests/python/bl_bundled_modules.py
@@ -25,6 +25,8 @@ import ssl
 import urllib3
 import zlib
 import zstandard
+import cattrs
+import fastjsonschema
 
 # Dynamically loaded modules, to ensure they have satisfactory dependencies.
 import _blake2