diff --git a/test/test_units.py b/test/test_units.py
index ce5a9250..8edef5c9 100644
--- a/test/test_units.py
+++ b/test/test_units.py
@@ -12,7 +12,7 @@ def test_units(container):
     """Various units tests
     Add a py file in the {image}/test/units dir and it will be automatically tested
     """
-    short_image_name = container.image_name[container.image_name.find('/') + 1:]
+    short_image_name = container.image_name[container.image_name.rfind('/') + 1:]
     host_data_dir = os.path.join(THIS_DIR, f"../{short_image_name}/test/units")
     LOGGER.info(f"Searching for units tests in {host_data_dir}")
     cont_data_dir = "/home/jovyan/data"