diff --git a/rpmbuild/bin/copr-builder b/rpmbuild/bin/copr-builder
index 4d0aa984f..31aa09fc5 100755
--- a/rpmbuild/bin/copr-builder
+++ b/rpmbuild/bin/copr-builder
@@ -5,7 +5,6 @@ Allow users to control their Copr builder instance
 https://github.com/fedora-copr/debate/tree/main/user-ssh-builders
 """
 
-import time
 import argparse
 from datetime import datetime, timedelta
 from contextlib import suppress
@@ -72,11 +71,17 @@ class CMDShow:
       - The user for which the instance was spawned
     """
     def run(self):
+        """
+        Print the information
+        """
         print("Remaining time for the machine: {0}".format(self.remaining_time))
         print("Current copr-rpmbuild PID: {0}".format(self.copr_rpmbuild_pid))
 
     @property
     def copr_rpmbuild_pid(self):
+        """
+        PID of the current/last `copr-rpmbuild` process
+        """
         with suppress(OSError), open(RPMBUILD_PID_PATH, "r") as fp:
             pid = fp.read()
             if pid.isdecimal():
@@ -85,6 +90,9 @@ class CMDShow:
 
     @property
     def expiration(self):
+        """
+        The user preference of when the VM should expire
+        """
         try:
             with open(EXPIRATION_PATH, "r") as fp:
                 timestamp = float(fp.read())
@@ -92,7 +100,6 @@ class CMDShow:
         except (OSError, ValueError):
             return None
 
-
     @property
     def remaining_time(self):
         """
@@ -105,6 +112,7 @@ class CMDShow:
         if delta.total_seconds() < 0:
             return "expired"
 
+        # TODO Print reasonable value when `copr-builder prolong --hours 666`
         days, hours, minutes, seconds = timedelta_to_dhms(delta)
         return ("{0} days, {1} hours, {2} minutes, {3} seconds"
                 .format(days, hours, minutes, seconds))
@@ -114,6 +122,7 @@ def cmd_prolong(args):
     """
     Prolong the VM expiration time
     """
+    # TODO Validate against `copr-builder prolong --hours 666`
     expiration = CMDShow().expiration + timedelta(hours=args.hours)
     with open(EXPIRATION_PATH, "w+") as fp:
         fp.write(str(expiration.timestamp()))
@@ -131,6 +140,9 @@ def cmd_release():
 
 
 def get_parser():
+    """
+    Return argument parser
+    """
     parser = argparse.ArgumentParser(
         "copr-builder",
         description="Control a Copr builder",
@@ -180,6 +192,9 @@ def get_parser():
 
 
 def main():
+    """
+    Main
+    """
     parser = get_parser()
     args = parser.parse_args()
 
@@ -190,7 +205,6 @@ def main():
         cmd_help()
 
     elif args.command == "show":
-        # cmd_show()
         cmd = CMDShow()
         cmd.run()