diff --git a/tests/test_plugin_HookRegistry.py b/tests/test_plugin_HookRegistry.py
new file mode 100644
index 0000000000000000000000000000000000000000..b7fd0b9521b6c461d0726c840e5203f0d2378bd3
--- /dev/null
+++ b/tests/test_plugin_HookRegistry.py
@@ -0,0 +1,53 @@
+"""Test main plugin's HookRegistry"""
+# Copyright © 2020  Brett Smith
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+import pytest
+
+from . import testutil
+
+from conservancy_beancount import plugin
+
+def hook_names(hooks, key):
+    return {type(hook).__name__ for hook in hooks[key]}
+
+def test_default_registrations():
+    hooks = plugin.HOOK_REGISTRY.group_by_directive()
+    post_hook_names = hook_names(hooks, 'Posting')
+    assert len(post_hook_names) >= 2
+    assert 'MetaExpenseAllocation' in post_hook_names
+    assert 'MetaTaxImplication' in post_hook_names
+
+def test_exclude_single():
+    hooks = plugin.HOOK_REGISTRY.group_by_directive('-expenseAllocation')
+    post_hook_names = hook_names(hooks, 'Posting')
+    assert post_hook_names
+    assert 'MetaExpenseAllocation' not in post_hook_names
+
+def test_exclude_group_then_include_single():
+    hooks = plugin.HOOK_REGISTRY.group_by_directive('-metadata expenseAllocation')
+    post_hook_names = hook_names(hooks, 'Posting')
+    assert 'MetaExpenseAllocation' in post_hook_names
+    assert 'MetaTaxImplication' not in post_hook_names
+
+def test_include_group_then_exclude_single():
+    hooks = plugin.HOOK_REGISTRY.group_by_directive('metadata -taxImplication')
+    post_hook_names = hook_names(hooks, 'Posting')
+    assert 'MetaExpenseAllocation' in post_hook_names
+    assert 'MetaTaxImplication' not in post_hook_names
+
+def test_unknown_group_name():
+    with pytest.raises(ValueError):
+        plugin.HOOK_REGISTRY.group_by_directive('UnKnownTestGroup')