diff --git a/build-relocatable-install.py b/build-relocatable-install.py
index 7e33e3bfd047f14d2835dca3734ee55d8543fe63..e74b7e80c2afeb2a9fb27dd15b89e3f0eba9fcf4 100755
--- a/build-relocatable-install.py
+++ b/build-relocatable-install.py
@@ -351,7 +351,8 @@ def main():
         installed_binaries = set()      # type: typing.Set[str]
 
         for package, source in (
-            list(DEPENDENCIES.items()) + list(PRIMARY_ARCH_DEPENDENCIES.items())
+            list(DEPENDENCIES.items())
+            + list(PRIMARY_ARCH_DEPENDENCIES.items())
         ):
             if os.path.exists('/usr/share/doc/{}/copyright'.format(package)):
                 installed_binaries.add(package)
@@ -373,7 +374,8 @@ def main():
                         package,
                     ], universal_newlines=True).splitlines()
                 ):
-                    source_to_download.add(re.sub(r'[+]srt[0-9a-z.]+$', '', expr))
+                    source_to_download.add(
+                        re.sub(r'[+]srt[0-9a-z.]+$', '', expr))
             else:
                 install(
                     '{}/build-relocatable/usr/share/doc/{}/copyright'.format(
@@ -398,7 +400,8 @@ def main():
                 'dpkg-query',
                 '-W',
                 '-f',
-                r'${binary:Package}\t${Version}\t${Source}\t${Installed-Size}\n',
+                (r'${binary:Package}\t${Version}\t'
+                 r'${Source}\t${Installed-Size}\n'),
             ] + sorted(installed_binaries), stdout=writer)
 
         with open(
diff --git a/pressure-vessel-test-ui b/pressure-vessel-test-ui
index cc638f19f5a82e5ed87cc41265da90c43d93d922..30340030c7cd30fdfb0cb4555a930e361c150956 100755
--- a/pressure-vessel-test-ui
+++ b/pressure-vessel-test-ui
@@ -64,7 +64,6 @@ class Gui:
                     os.path.join(source_of_runtimes, member)
                 )
                 files = os.path.join(path, 'files')
-                metadata = os.path.join(path, 'metadata')
 
                 if os.path.isdir(files):
                     description = self._describe_runtime(path)
@@ -180,6 +179,7 @@ class Gui:
             except GLib.Error:
                 pass
             else:
+                assert name is not None
                 variant = name.split('.')[-1]
         except GLib.Error:
             pass
diff --git a/tests/relocatable-install.py b/tests/relocatable-install.py
index edaaba0282ba45cadc7ed666720019b932845df0..9875842bcd038fcb4c20c6dba2b551c7f45728b5 100755
--- a/tests/relocatable-install.py
+++ b/tests/relocatable-install.py
@@ -23,7 +23,6 @@
 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 import argparse
-import json
 import os
 import subprocess
 import sys