diff --git a/scanpipe/models.py b/scanpipe/models.py
index 9407e2e22..3fa0b4bcb 100644
--- a/scanpipe/models.py
+++ b/scanpipe/models.py
@@ -3339,11 +3339,17 @@ def prefetch_for_serializer(self):
         `DiscoveredDependencySerializer`.
         Only the fields required by the serializer are fetched on the relations.
         """
-        manager = DiscoveredPackage.objects
         return self.prefetch_related(
-            Prefetch("for_package", queryset=manager.only("package_uid")),
-            Prefetch("resolved_to_package", queryset=manager.only("package_uid")),
-            Prefetch("datafile_resource", queryset=manager.only("path")),
+            Prefetch(
+                "for_package", queryset=DiscoveredPackage.objects.only("package_uid")
+            ),
+            Prefetch(
+                "resolved_to_package",
+                queryset=DiscoveredPackage.objects.only("package_uid"),
+            ),
+            Prefetch(
+                "datafile_resource", queryset=CodebaseResource.objects.only("path")
+            ),
         )
 
 
diff --git a/scanpipe/tests/pipes/test_output.py b/scanpipe/tests/pipes/test_output.py
index 664c82a8c..471d56c1b 100644
--- a/scanpipe/tests/pipes/test_output.py
+++ b/scanpipe/tests/pipes/test_output.py
@@ -294,7 +294,8 @@ def test_scanpipe_pipes_outputs_get_cyclonedx_bom_dependency_tree(self):
         make_dependency(project, for_package=a, resolved_to_package=b)
         make_dependency(project, for_package=b, resolved_to_package=c)
 
-        output_file = output.to_cyclonedx(project=project)
+        with self.assertNumQueries(2):
+            output_file = output.to_cyclonedx(project=project)
         results_json = json.loads(output_file.read_text())
 
         expected = [
@@ -455,7 +456,7 @@ def test_scanpipe_pipes_outputs_to_attribution(self):
         package_data["notice_text"] = "Notice text"
         pipes.update_or_create_package(project, package_data)
 
-        with self.assertNumQueries(1):
+        with self.assertNumQueries(2):
             output_file = output.to_attribution(project=project)
 
         expected_file = self.data_path / "outputs" / "expected_attribution.html"