diff --git a/swh/lister/core/simple_lister.py b/swh/lister/core/simple_lister.py
--- a/swh/lister/core/simple_lister.py
+++ b/swh/lister/core/simple_lister.py
@@ -59,6 +59,12 @@
 
         return response, all_injected
 
+    def transport_response_simplified(self, response):
+        """Transform response to list for model manipulation
+
+        """
+        return [self.get_model_from_repo(repo_name) for repo_name in response]
+
     def run(self):
         """Query the server which answers in one query.  Stores the
            information, dropping actual redundant information we
diff --git a/swh/lister/cran/lister.py b/swh/lister/cran/lister.py
--- a/swh/lister/cran/lister.py
+++ b/swh/lister/cran/lister.py
@@ -93,9 +93,3 @@
             'origin_url': project_url,
             'origin_type': 'cran',
         }
-
-    def transport_response_simplified(self, response):
-        """Transform response to list for model manipulation
-
-        """
-        return [self.get_model_from_repo(repo) for repo in response]
diff --git a/swh/lister/gnu/lister.py b/swh/lister/gnu/lister.py
--- a/swh/lister/gnu/lister.py
+++ b/swh/lister/gnu/lister.py
@@ -129,12 +129,6 @@
             'origin_type': 'tar',
         }
 
-    def transport_response_simplified(self, response):
-        """Transform response to list for model manipulation
-
-        """
-        return [self.get_model_from_repo(repo) for repo in response]
-
 
 def find_tarballs(package_file_structure, url):
     '''Recursively lists tarballs present in the folder and subfolders for a
diff --git a/swh/lister/packagist/lister.py b/swh/lister/packagist/lister.py
--- a/swh/lister/packagist/lister.py
+++ b/swh/lister/packagist/lister.py
@@ -77,9 +77,3 @@
             'origin_url': url,
             'origin_type': 'packagist',
         }
-
-    def transport_response_simplified(self, response):
-        """Transform response to list for model manipulation
-
-        """
-        return [self.get_model_from_repo(repo_name) for repo_name in response]
diff --git a/swh/lister/pypi/lister.py b/swh/lister/pypi/lister.py
--- a/swh/lister/pypi/lister.py
+++ b/swh/lister/pypi/lister.py
@@ -68,9 +68,3 @@
             'origin_url': project_url,
             'origin_type': 'pypi',
         }
-
-    def transport_response_simplified(self, response):
-        """(Override) Transform response to list for model manipulation
-
-        """
-        return [self.get_model_from_repo(repo_name) for repo_name in response]