diff --git a/patacrep/songbook/__main__.py b/patacrep/songbook/__main__.py
index daafc9f5..bac1c5ea 100644
--- a/patacrep/songbook/__main__.py
+++ b/patacrep/songbook/__main__.py
@@ -113,9 +113,8 @@ def argument_parser(args):
     return options
 
 
-def main():
+def main(args):
     """Main function:"""
-
     # set script locale to match user's
     try:
         locale.setlocale(locale.LC_ALL, '')
@@ -123,7 +122,7 @@ def main():
         # Locale is not installed on user's system, or wrongly configured.
         LOGGER.error("Locale error: {}\n".format(str(error)))
 
-    options = argument_parser(sys.argv[1:])
+    options = argument_parser(args[1:])
 
     try:
         songbook = patacrep.songbook.open_songbook(options.book[-1])
@@ -152,4 +151,4 @@ def main():
     sys.exit(0)
 
 if __name__ == '__main__':
-    main()
+    main(sys.argv)
diff --git a/patacrep/tools/__main__.py b/patacrep/tools/__main__.py
index d9202633..669dcec7 100644
--- a/patacrep/tools/__main__.py
+++ b/patacrep/tools/__main__.py
@@ -104,12 +104,11 @@ def commandline_parser():
 
     return parser
 
-def main():
+def main(args):
     """Main function"""
-
     parser = commandline_parser()
-    args = parser.parse_args()
-    args.function(args.remainder)
+    args = parser.parse_args(args[1:])
+    args.function(["patatools-{}".format(args.subcommand)] + args.remainder)
 
 if __name__ == "__main__":
-    main()
+    main(sys.argv)
diff --git a/patacrep/tools/cache/__main__.py b/patacrep/tools/cache/__main__.py
index 8dc2ee07..4aa8b2ec 100644
--- a/patacrep/tools/cache/__main__.py
+++ b/patacrep/tools/cache/__main__.py
@@ -37,32 +37,32 @@ def commandline_parser():
         )
     subparsers.required = True
 
-    clear = subparsers.add_parser(
-        "clear",
+    clean = subparsers.add_parser(
+        "clean",
         description="Delete cache.",
         help="Delete cache.",
         )
-    clear.add_argument(
+    clean.add_argument(
         'songbook',
         metavar="SONGBOOK",
         help=textwrap.dedent("""Songbook file to be used to look for cache path."""),
         type=filename,
         )
-    clear.set_defaults(command=do_clear)
+    clean.set_defaults(command=do_clean)
 
     return parser
 
-def do_clear(namespace):
-    """Execute the `patatools cache clear` command."""
+def do_clean(namespace):
+    """Execute the `patatools cache clean` command."""
     for datadir in songbook.open_songbook(namespace.songbook)['datadir']:
         cachedir = os.path.join(datadir, ".cache")
         LOGGER.info("Deleting cache directory '{}'...".format(cachedir))
         if os.path.isdir(cachedir):
             shutil.rmtree(cachedir)
 
-def main(args=None):
+def main(args):
     """Main function: run from command line."""
-    options = commandline_parser().parse_args(args)
+    options = commandline_parser().parse_args(args[1:])
     try:
         options.command(options)
     except errors.SongbookError as error:
@@ -70,4 +70,4 @@ def main(args=None):
         sys.exit(1)
 
 if __name__ == "__main__":
-    main()
+    main(sys.argv)
diff --git a/test/test_patatools/test_cache.py b/test/test_patatools/test_cache.py
index daa47af1..6b22a74d 100644
--- a/test/test_patatools/test_cache.py
+++ b/test/test_patatools/test_cache.py
@@ -6,9 +6,12 @@ import os
 import shutil
 import unittest
 
-from patacrep.tools import convert
+from patacrep.files import chdir
+from patacrep.tools.__main__ import main as tools_main
+from patacrep.tools.cache.__main__ import main as cache_main
+from patacrep.songbook.__main__ import main as songbook_main
 
-CACHEDIR = os.path.join(os.path.dirname(__file__), "test_cache_datadir", "songs", ".cache")
+CACHEDIR = os.path.join(os.path.dirname(__file__), "test_cache_datadir", ".cache")
 
 class TestCache(unittest.TestCase):
     """Test of the "patatools cache" subcommand"""
@@ -16,26 +19,49 @@ class TestCache(unittest.TestCase):
     def setUp(self):
         """Remove cache."""
         self._remove_cache()
+        self.assertFalse(os.path.exists(CACHEDIR))
 
     def tearDown(self):
         """Remove cache."""
         self._remove_cache()
+        self.assertFalse(os.path.exists(CACHEDIR))
 
-    def _remove_cache(self):
+    @staticmethod
+    def _remove_cache():
         """Delete cache."""
         shutil.rmtree(CACHEDIR, ignore_errors=True)
 
-    def test_clean(self):
+    def _system(self, main, args):
+        with chdir(os.path.dirname(__file__)):
+            try:
+                main(args)
+            except SystemExit as systemexit:
+                self.assertEqual(systemexit.code, 0)
+
+    def test_clean_exists(self):
         """Test of the "patatools cache clean" subcommand"""
-        # Cache does not exist
-        self.assertFalse(os.path.exists(CACHEDIR))
+        for main, args in [
+                (tools_main, ["patatools", "cache", "clean", "test_cache.sb"]),
+                (cache_main, ["patatools-cache", "clean", "test_cache.sb"]),
+            ]:
+            with self.subTest(main=main, args=args):
+                # First compilation. Ensure that cache exists afterwards
+                self._system(songbook_main, ["songbook", "test_cache.sb"])
+                self.assertTrue(os.path.exists(CACHEDIR))
 
-        # First compilation. Ensure that cache exists afterwards
-        TODO
-        self.assertTrue(os.path.exists(CACHEDIR))
+                # Clean cache
+                self._system(main, args)
 
-        # Clean cache
-        TODO
+                # Ensure that cache does not exist
+                self.assertFalse(os.path.exists(CACHEDIR))
 
-        # Ensure that cache does not exist
-        self.assertFalse(os.path.exists(CACHEDIR))
+    def test_clean_not_exists(self):
+        """Test of the "patatools cache clean" subcommand"""
+        # Clean non-existent cache
+        for main, args in [
+                (tools_main, ["patatools", "cache", "clean", "test_cache.sb"]),
+                (cache_main, ["patatools-cache", "clean", "test_cache.sb"]),
+            ]:
+            with self.subTest(main=main, args=args):
+                # Clean cache
+                self._system(main, args)