diff --git a/plinth/tests/coverage/test_coverage.py b/plinth/tests/coverage/test_coverage.py
index b513a26ff..c5657558e 100644
--- a/plinth/tests/coverage/test_coverage.py
+++ b/plinth/tests/coverage/test_coverage.py
@@ -35,13 +35,13 @@ import unittest
 from plinth import tests
 
 
-# project directories with testable source code
+# Project directories with testable source code
 SOURCE_DIRS = ['plinth'] + glob.glob('plinth/modules/*')
 
-# files to exclude from coverage analysis and reporting
+# Files to exclude from coverage analysis and reporting
 FILES_TO_OMIT = ['plinth/tests/*.py']
 
-# location of coverage HTML report files
+# Location of coverage HTML report files
 COVERAGE_REPORT_DIR = 'plinth/tests/coverage/report'
 
 
@@ -50,59 +50,55 @@ class TestCoverageCommand(setuptools.Command):
     Subclass of setuptools Command to perform code test coverage analysis.
     """
 
-    description = "Run test coverage analysis"
+    description = 'Run test coverage analysis'
     user_options = [
-        ('test-module=', 't', "Explicitly specify a single module to test")
+        ('test-module=', 't', 'Explicitly specify a single module to test')
     ]
 
     def initialize_options(self):
-        """
-        Initialize options to default values.
-        """
+        """Initialize options to default values."""
         self.test_module = None
 
     def finalize_options(self):
         pass
 
     def run(self):
-        """
-        Main command implementation.
-        """
+        """Main command implementation."""
         if self.distribution.install_requires:
             self.distribution.fetch_build_eggs(
                 self.distribution.install_requires)
 
-        # erase any existing HTML report files
         if self.distribution.tests_require:
             self.distribution.fetch_build_eggs(self.distribution.tests_require)
 
+        # Erase any existing HTML report files
         try:
             shutil.rmtree(COVERAGE_REPORT_DIR, True)
         except:
             pass
 
-        # initialize a test suite for one or all modules
+        # Initialize a test suite for one or all modules
         if self.test_module is None:
             test_suite = tests.TEST_SUITE
         else:
-            test = unittest.defaultTestLoader.\
-                loadTestsFromNames([self.test_module])
+            test = unittest.defaultTestLoader.loadTestsFromNames(
+                [self.test_module])
             test_suite = unittest.TestSuite(test)
 
-        # run the coverage analysis
+        # Run the coverage analysis
         runner = unittest.TextTestRunner()
         import coverage
         cov = coverage.coverage(auto_data=True, branch=True,
                                 source=SOURCE_DIRS, omit=FILES_TO_OMIT)
-        cov.erase()     # erase existing coverage data file
+        cov.erase()     # Erase existing coverage data file
         cov.start()
         runner.run(test_suite)
         cov.stop()
 
-        # generate an HTML report and print overall coverage
-        html_report_title = ("FreedomBox:Plinth -- Test Coverage as of " +
-                             time.strftime("%x %X %Z"))
+        # Generate an HTML report and print overall coverage
+        html_report_title = 'FreedomBox:Plinth -- Test Coverage as of ' + \
+                            time.strftime('%x %X %Z')
         _coverage = cov.html_report(directory=COVERAGE_REPORT_DIR,
                                     omit=FILES_TO_OMIT,
                                     title=html_report_title)
-        print('''\nOverall test coverage: {0:.2f} %\n'''.format(_coverage))
+        print('\nOverall test coverage: {0:.2f} %\n'.format(_coverage))