diff --git a/tests/conftest.py b/tests/conftest.py
index 65ab500..576d959 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -14,14 +14,17 @@ from subprocess import run
 import pytest
 
 
-@pytest.fixture(scope='session')
-def sample_file(tmp_path_factory):
+#@pytest.fixture(scope='session')
+@pytest.fixture
+def sample_file(tmp_path_factory, aclin):
   directory = tmp_path_factory.mktemp('sample_files')
   file = directory / 'file_with_user_read_acl'
   file.touch()
   assert not file.read_text()  # file should exist
-  run(['setfacl', '-m', 'u:user:r', file], check=True)
+  requested_acl = aclin
+  print(requested_acl)
+  run(['setfacl', '-m', requested_acl, file], check=True)
   out = run(['getfacl', '-c', file], check=True, capture_output=True)
-  assert 'user:user:r--' in out.stdout.decode()  # file should have the ACL set
+  assert requested_acl in out.stdout.decode()  # file should have the ACL set
   yield file
   rmtree(directory)
diff --git a/tests/test_pyacl.py b/tests/test_pyacl.py
index c82b136..0bd9241 100644
--- a/tests/test_pyacl.py
+++ b/tests/test_pyacl.py
@@ -8,39 +8,80 @@ An English copy of the Licence is shipped in a file called LICENSE along with th
 You may obtain copies of the Licence in any of the official languages at https://joinup.ec.europa.eu/collection/eupl/eupl-text-eupl-12.
 """
 
+from pytest import mark
+
 from pyacl import acl
 
-
-def test_parse_acl(sample_file):
-  want = {
-    'user': {
+testdata = [
+  (
+    'user:user:r',
+    {
       'user': {
-        'read': True,
-        'write': False,
-        'execute': False,
+        'user': {
+          'read': True,
+          'write': False,
+          'execute': False,
+        },
+      },
+      'group': {
+        None: {
+          'read': True,
+          'write': False,
+          'execute': False,
+        },
+      },
+      'mask': {
+        None: {
+          'read': True,
+          'write': False,
+          'execute': False,
+        },
+      },
+      'other': {
+        None: {
+          'read': True,
+          'write': False,
+          'execute': False,
+        },
       },
     },
-    'group': {
-      None: {
-        'read': True,
-        'write': False,
-        'execute': False,
+  ),
+  (
+    'user:user:-w-',
+    {
+      'user': {
+        'user': {
+          'read': False,
+          'write': True,
+          'execute': False,
+        },
+      },
+      'group': {
+        None: {
+          'read': True,
+          'write': False,
+          'execute': False,
+        },
+      },
+      'mask': {
+        None: {
+          'read': True,
+          'write': True,
+          'execute': False,
+        },
+      },
+      'other': {
+        None: {
+          'read': True,
+          'write': False,
+          'execute': False,
+        },
       },
     },
-    'mask': {
-      None: {
-        'read': True,
-        'write': False,
-        'execute': False,
-      },
-    },
-    'other': {
-      None: {
-        'read': True,
-        'write': False,
-        'execute': False,
-      },
-    },
-  }
+  ),
+]
+
+@mark.parametrize('aclin, aclout', testdata)
+def test_parse_acl(sample_file, aclin, aclout):
   have = acl.parsefromfile(sample_file)
-  assert want == have
+  assert aclout == have