diff --git a/lib/galaxy/tool_shed/metadata/metadata_generator.py b/lib/galaxy/tool_shed/metadata/metadata_generator.py
index 39d40555b841..d797d1eba98c 100644
--- a/lib/galaxy/tool_shed/metadata/metadata_generator.py
+++ b/lib/galaxy/tool_shed/metadata/metadata_generator.py
@@ -1009,10 +1009,7 @@ def handle_repository_elem(self, repository_elem, only_if_compiling_contained_td
                 # if an installed repository cannot be found.  This may not be ideal because the tool
                 # shed may have simply been inaccessible when metadata was being generated for the
                 # installed tool shed repository.
-                error_message = (
-                    "Ignoring invalid repository dependency definition for tool shed %s, name %s, owner %s, "
-                    % (toolshed, name, owner)
-                )
+                error_message = f"Ignoring invalid repository dependency definition for tool shed {toolshed}, name {name}, owner {owner}, "
                 error_message += f"changeset revision {changeset_revision}."
                 log.debug(error_message)
                 is_valid = False
diff --git a/lib/tool_shed/metadata/repository_metadata_manager.py b/lib/tool_shed/metadata/repository_metadata_manager.py
index 89d26bae3015..9ec1b29271b2 100644
--- a/lib/tool_shed/metadata/repository_metadata_manager.py
+++ b/lib/tool_shed/metadata/repository_metadata_manager.py
@@ -208,10 +208,7 @@ def handle_repository_elem(self, repository_elem, only_if_compiling_contained_td
                         found = True
                         break
                 if not found:
-                    error_message = (
-                        "Ignoring repository dependency definition for tool shed %s, name %s, owner %s, "
-                        % (toolshed, name, owner)
-                    )
+                    error_message = f"Ignoring repository dependency definition for tool shed {toolshed}, name {name}, owner {owner}, "
                     error_message += (
                         f"changeset revision {changeset_revision} because the changeset revision is invalid.  "
                     )
@@ -221,10 +218,7 @@ def handle_repository_elem(self, repository_elem, only_if_compiling_contained_td
         else:
             # Repository dependencies are currently supported within a single tool shed.
             error_message = "Repository dependencies are currently supported only within the same tool shed.  Ignoring "
-            error_message += (
-                "repository dependency definition  for tool shed %s, name %s, owner %s, changeset revision %s.  "
-                % (toolshed, name, owner, changeset_revision)
-            )
+            error_message += f"repository dependency definition  for tool shed {toolshed}, name {name}, owner {owner}, changeset revision {changeset_revision}.  "
             log.debug(error_message)
             is_valid = False
             return repository_dependency_tup, is_valid, error_message