diff --git a/.gitlab-ci/lava/lava_job_submitter.py b/.gitlab-ci/lava/lava_job_submitter.py
index 0d38b43fe2b..82867f1a3bc 100755
--- a/.gitlab-ci/lava/lava_job_submitter.py
+++ b/.gitlab-ci/lava/lava_job_submitter.py
@@ -58,7 +58,7 @@ except ImportError as e:
 
 # Timeout in seconds to decide if the device from the dispatched LAVA job has
 # hung or not due to the lack of new log output.
-DEVICE_HANGING_TIMEOUT_SEC = int(getenv("DEVICE_HANGING_TIMEOUT_SEC",  5*60))
+DEVICE_HANGING_TIMEOUT_SEC = int(getenv("DEVICE_HANGING_TIMEOUT_SEC", 5 * 60))
 
 # How many seconds the script should wait before try a new polling iteration to
 # check if the dispatched LAVA job is running or waiting in the job queue.
@@ -182,7 +182,6 @@ def is_job_hanging(job, max_idle_time):
 
 
 def parse_log_lines(job, log_follower, new_log_lines):
-
     if log_follower.feed(new_log_lines):
         # If we had non-empty log data, we can assure that the device is alive.
         job.heartbeat()
@@ -200,7 +199,6 @@ def parse_log_lines(job, log_follower, new_log_lines):
 
 
 def fetch_new_log_lines(job):
-
     # The XMLRPC binary packet may be corrupted, causing a YAML scanner error.
     # Retry the log fetching several times before exposing the error.
     for _ in range(5):
@@ -509,7 +507,6 @@ class StructuredLoggerWrapper:
     def logger_context(self):
         context = contextlib.nullcontext()
         try:
-
             global STRUCTURAL_LOG
             STRUCTURAL_LOG = StructuredLogger(
                 self.__submitter.structured_log_file, truncate=True
diff --git a/.gitlab-ci/tests/test_lava_job_submitter.py b/.gitlab-ci/tests/test_lava_job_submitter.py
index b599cbdd8ad..5116ea30545 100644
--- a/.gitlab-ci/tests/test_lava_job_submitter.py
+++ b/.gitlab-ci/tests/test_lava_job_submitter.py
@@ -83,7 +83,7 @@ def lava_job_submitter(
 def test_submit_and_follow_respects_exceptions(mock_sleep, mock_proxy, exception):
     with pytest.raises(MesaCIException):
         proxy = mock_proxy(side_effect=exception)
-        job = LAVAJob(proxy, '')
+        job = LAVAJob(proxy, "")
         log_follower = bootstrap_log_follower()
         follow_job_execution(job, log_follower)
 
@@ -165,21 +165,13 @@ PROXY_SCENARIOS = {
         mock_logs(result="pass"),
         does_not_raise(),
         "pass",
-        {
-            "testsuite_results": [
-                generate_testsuite_result(result="pass")
-            ]
-        },
+        {"testsuite_results": [generate_testsuite_result(result="pass")]},
     ),
     "no retries, but testsuite fails": (
         mock_logs(result="fail"),
         does_not_raise(),
         "fail",
-        {
-            "testsuite_results": [
-                generate_testsuite_result(result="fail")
-            ]
-        },
+        {"testsuite_results": [generate_testsuite_result(result="fail")]},
     ),
     "no retries, one testsuite fails": (
         generate_n_logs(n=1, tick_fn=0, result="fail"),
@@ -188,7 +180,7 @@ PROXY_SCENARIOS = {
         {
             "testsuite_results": [
                 generate_testsuite_result(result="fail"),
-                generate_testsuite_result(result="pass")
+                generate_testsuite_result(result="pass"),
             ]
         },
     ),
@@ -438,9 +430,7 @@ def test_job_combined_status(
         "lava.lava_job_submitter.retriable_follow_job"
     ) as mock_retriable_follow_job, patch(
         "lava.lava_job_submitter.LAVAJobSubmitter._LAVAJobSubmitter__prepare_submission"
-    ) as mock_prepare_submission, patch(
-        "sys.exit"
-    ):
+    ) as mock_prepare_submission, patch("sys.exit"):
         from lava.lava_job_submitter import STRUCTURAL_LOG
 
         mock_retriable_follow_job.return_value = MagicMock(status=finished_job_status)