diff --git a/reana_client/api/client.py b/reana_client/api/client.py
index ba0d83bb..ecdfd5e4 100644
--- a/reana_client/api/client.py
+++ b/reana_client/api/client.py
@@ -303,9 +303,9 @@ def create_workflow_from_json(
             reana_yaml["outputs"] = outputs
         if workflow_file:
             reana_yaml["workflow"]["file"] = workflow_file
-            reana_yaml["workflow"][
-                "specification"
-            ] = load_workflow_spec_from_reana_yaml(reana_yaml, workspace_path)
+            reana_yaml["workflow"]["specification"] = (
+                load_workflow_spec_from_reana_yaml(reana_yaml, workspace_path)
+            )
         else:
             reana_yaml["workflow"]["specification"] = workflow_json
         # The function below loads the input parameters into the reana_yaml dictionary
diff --git a/reana_client/utils.py b/reana_client/utils.py
index b8596bf2..16e2ac14 100644
--- a/reana_client/utils.py
+++ b/reana_client/utils.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 #
 # This file is part of REANA.
-# Copyright (C) 2017, 2018, 2019, 2020, 2021, 2022 CERN.
+# Copyright (C) 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 CERN.
 #
 # REANA is free software; you can redistribute it and/or modify it
 # under the terms of the MIT License; see LICENSE file for more details.
@@ -146,12 +146,15 @@ def fromisoformat(date_string):
     progress = workflow.get("progress", {})
     run_started_at = progress.get("run_started_at")
     run_finished_at = progress.get("run_finished_at")
+    run_stopped_at = progress.get("run_stopped_at")
 
     duration = None
     if run_started_at:
         start_time = fromisoformat(run_started_at)
         if run_finished_at:
             end_time = fromisoformat(run_finished_at)
+        elif run_stopped_at:
+            end_time = fromisoformat(run_stopped_at)
         else:
             end_time = datetime.utcnow()
         duration = round((end_time - start_time).total_seconds())
diff --git a/reana_client/validation/environments.py b/reana_client/validation/environments.py
index 878d9dda..0df707c8 100644
--- a/reana_client/validation/environments.py
+++ b/reana_client/validation/environments.py
@@ -434,9 +434,11 @@ def validate_environment(self):
         def _check_environment(environment):
             image = "{}{}".format(
                 environment["image"],
-                ":{}".format(environment["imagetag"])
-                if "imagetag" in environment
-                else "",
+                (
+                    ":{}".format(environment["imagetag"])
+                    if "imagetag" in environment
+                    else ""
+                ),
             )
             k8s_uid = next(
                 (
diff --git a/tests/test_utils.py b/tests/test_utils.py
index cbef171b..b982e9e6 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -34,6 +34,17 @@ def test_duration_finished_workflow():
     assert get_workflow_duration(workflow) == 60 + 11
 
 
+def test_duration_stopped_workflow():
+    workflow = {
+        "progress": {
+            "run_started_at": "2022-06-16T14:42:11",
+            "run_stopped_at": "2022-06-16T14:43:22",
+            "run_finished_at": None,
+        }
+    }
+    assert get_workflow_duration(workflow) == 60 + 11
+
+
 def test_duration_running_workflow():
     workflow = {
         "progress": {