diff --git a/test_tools/process_client.py b/test_tools/process_client.py
index 1a06af67f..f3b0761d6 100644
--- a/test_tools/process_client.py
+++ b/test_tools/process_client.py
@@ -46,6 +46,7 @@
                                                        'patch_workspace_publication_url',
                                                        'get_workspace_publications_url',
                                                        'get_workspace_publication_url',
+                                                       'get_workspace_publication_thumbnail_url',
                                                        'delete_workspace_publication_url',
                                                        'delete_workspace_publications_url',
                                                        'keys_to_check',
@@ -59,6 +60,7 @@
                                                       'rest_workspace_map.patch',
                                                       'rest_workspace_maps.get',
                                                       'rest_workspace_map.get',
+                                                      'rest_workspace_map_thumbnail.get',
                                                       'rest_workspace_map.delete_map',
                                                       'rest_workspace_maps.delete',
                                                       map_keys_to_check,
@@ -72,6 +74,7 @@
                                                         'rest_workspace_layer.patch',
                                                         'rest_workspace_layers.get',
                                                         'rest_workspace_layer.get',
+                                                        'rest_workspace_layer_thumbnail.get',
                                                         'rest_workspace_layer.delete_layer',
                                                         'rest_workspace_layers.delete',
                                                         layer_keys_to_check,
@@ -91,6 +94,7 @@
                                                   None,
                                                   None,
                                                   None,
+                                                  None,
                                                   ),
                          }
 
@@ -738,3 +742,19 @@ def get_workspace_map_file(publication_type, workspace, name, headers=None, acto
     response = requests.get(r_url, headers=headers, timeout=HTTP_TIMEOUT)
     raise_layman_error(response)
     return response.json()
+
+
+def get_workspace_publication_thumbnail(publication_type, workspace, name, *, actor_name=None):
+    headers = {}
+    publication_type_def = PUBLICATION_TYPES_DEF[publication_type]
+    if actor_name:
+        assert TOKEN_HEADER not in headers
+
+    if actor_name and actor_name != settings.ANONYM_USER:
+        headers.update(get_authz_headers(actor_name))
+
+    with app.app_context():
+        r_url = url_for(publication_type_def.get_workspace_publication_thumbnail_url, **{publication_type_def.url_param_name: name}, workspace=workspace)
+    response = requests.get(r_url, headers=headers, timeout=HTTP_TIMEOUT)
+    raise_layman_error(response)
+    return response.content