diff --git a/examples/input_data_callback.py b/examples/input_data_callback.py
index 92fe7d56..ccce25ee 100644
--- a/examples/input_data_callback.py
+++ b/examples/input_data_callback.py
@@ -56,5 +56,6 @@ class MyPipeline(Pipen):
     data = [prepare_input_data()]
     forks = 3
 
+
 if __name__ == "__main__":
     MyPipeline().run()
diff --git a/examples/mako-templating.py b/examples/mako-templating.py
index 0068bc82..e21cf25b 100644
--- a/examples/mako-templating.py
+++ b/examples/mako-templating.py
@@ -4,6 +4,7 @@
 from pipen.template import Template
 from pipen import Proc, Pipen
 
+
 class TemplateMako(Template):
 
     name = "mako"
diff --git a/examples/multijobs.py b/examples/multijobs.py
index 062f0045..a44d86a6 100644
--- a/examples/multijobs.py
+++ b/examples/multijobs.py
@@ -1,6 +1,7 @@
 """An example for a process to have multiple jobs and run jobs in parallel"""
 from pipen import Proc, Pipen
 
+
 class MultiJobProc(Proc):
     """A process with multiple jobs"""
     input = "i"
@@ -12,5 +13,6 @@ class MultiJobProc(Proc):
     # Let the job takes long the see the parallelization from the progressbar
     script = "sleep 1; echo {{in.i}} > {{out.outfile}}"
 
+
 if __name__ == "__main__":
     Pipen().set_starts(MultiJobProc).run()
diff --git a/examples/plugin-example.py b/examples/plugin-example.py
index a3cd764a..5d27318e 100644
--- a/examples/plugin-example.py
+++ b/examples/plugin-example.py
@@ -5,6 +5,7 @@
 
 logger = get_logger("notify", "info")
 
+
 class NotifyPlugin:
     version = "0.0.0"
 
@@ -28,8 +29,10 @@ async def on_proc_start(proc):
     async def on_proc_done(proc, succeeded):
         logger.info("Calling on_proc_done, succeeded = %s", succeeded)
 
+
 class AProcess(Proc):
     input = "a"
 
+
 if __name__ == "__main__":
     Pipen(plugins=[NotifyPlugin]).set_starts(AProcess).run()
diff --git a/examples/python-script.py b/examples/python-script.py
index 09ba98e1..0b5f2963 100644
--- a/examples/python-script.py
+++ b/examples/python-script.py
@@ -2,6 +2,7 @@
 
 from pipen import Pipen, Proc
 
+
 class PythonScriptProc(Proc):
     """A process using python interpreter for script"""
     input = "a"
@@ -13,5 +14,6 @@ class PythonScriptProc(Proc):
         Path("{{out.outfile}}").write_text("{{in.a}}")
     """
 
+
 if __name__ == "__main__":
     Pipen().set_starts(PythonScriptProc).run()
diff --git a/examples/retry.py b/examples/retry.py
index ebbb378b..e4064a07 100644
--- a/examples/retry.py
+++ b/examples/retry.py
@@ -2,6 +2,7 @@
 import time
 from pipen import Pipen, Proc
 
+
 class RetryProc(Proc):
     """Retry the jobs when fail"""
     input = "starttime"
@@ -10,13 +11,19 @@ class RetryProc(Proc):
     # Make sure the job succeeds finally
     num_retries = 10
     script = """
-        if [[ $(date +"%s") -gt {{in.starttime + 3}} ]]; then
+        timefile="{{job.outdir}}/time.txt"
+        now=$(date +"%s")
+        expect={{in.starttime + 10}}
+        if [[ $now -gt $expect ]]; then
+            echo $now $expect 0 >> "$timefile"
             exit 0
         else
+            echo $now $expect 1 >> "$timefile"
             exit 1
         fi
     """
 
+
 if __name__ == "__main__":
     # Show debug information so we see the retrying message
     Pipen(loglevel="debug").set_starts(RetryProc).run()