diff --git a/casimport/__init__.py b/casimport/__init__.py
index 13520c0..c290e92 100644
--- a/casimport/__init__.py
+++ b/casimport/__init__.py
@@ -144,6 +144,7 @@ class FileDirCAS(object):
 
 	def __init__(self, path):
 		self._path = pathlib.Path(path)
+		self._path.mkdir(exist_ok=True)
 		self._hashes = {}
 
 	def refresh_dir(self):
@@ -343,10 +344,10 @@ class CASFinder(MetaPathFinder, Loader):
 
 def defaultinit(casf):
 	basedir = pathlib.Path.home() / '.casimport'
+	basedir.mkdir(exist_ok=True)
 
 	conffile = basedir / 'casimport.conf'
 	if not conffile.exists():
-		basedir.mkdir(exist_ok=True)
 		import casimport
 		with importlib.resources.path(casimport,
 		    'default.conf') as defconf:
@@ -434,6 +435,12 @@ class Test(unittest.TestCase):
 		shutil.rmtree(self.basetempdir)
 		self.tempdir = None
 
+	def test_filedircas(self):
+		cachedir = self.tempdir / 'cache'
+		fd = FileDirCAS(cachedir)
+
+		self.assertTrue(cachedir.exists())
+
 	def test_filedircas_limit_refresh(self):
 		# XXX - only refresh when the dir has changed, and each
 		# file has changed
@@ -529,7 +536,8 @@ class Test(unittest.TestCase):
 		# setup the cache
 		temphome = self.tempdir / 'home'
 		temphome.mkdir()
-		cachedir = temphome / '.casimport_cache'
+		cachedir = temphome / '.casimport' / 'cache'
+		cachedir.mkdir(parents=True)
 
 		# add the test module's path
 		fixdir = str(self.fixtures)
@@ -540,11 +548,7 @@ class Test(unittest.TestCase):
 				with CASFinder() as f, \
 				    tempattrset(sys.modules[__name__],
 				    'load_mod_aliases', f.load_mod_aliases):
-					defaultinit(f)
-
-					# XXX - fix this so this is properly
-					# used.  It's using other methods to
-					# work currently
+					f.register(FileDirCAS(cachedir))
 
 					# and that hello.py is in the cache
 					shutil.copy(self.fixtures / 'hello.py',
@@ -588,6 +592,8 @@ class Test(unittest.TestCase):
 
 				f.register(fakeipfsloader)
 
+				self.assertNotIn('randpkg', sys.modules)
+
 				# that the import is successful
 				import randpkg