diff --git a/tests/test_plugin.py b/tests/test_plugin.py
index c2aba1bff4b3c2b483debb34b131d7b5a599491a..f64d1b9b6ddd153ed940e9201f11ab9d4026ec87 100644
--- a/tests/test_plugin.py
+++ b/tests/test_plugin.py
@@ -18,24 +18,39 @@ import pytest
 
 from . import testutil
 
-from conservancy_beancount import beancount_types, plugin
+from conservancy_beancount import beancount_types, errors as errormod, plugin
 
 HOOK_REGISTRY = plugin.HookRegistry()
 
+class NonError(errormod.Error):
+    pass
+
+
 class TransactionHook:
     DIRECTIVE = beancount_types.Transaction
     HOOK_GROUPS = frozenset()
 
+    def __init__(self, config):
+        self.config = config
+
     def run(self, txn):
         assert False, "something called base class run method"
 
 
+@HOOK_REGISTRY.add_hook
+class ConfigurationError(TransactionHook):
+    HOOK_GROUPS = frozenset(['unconfigured'])
+
+    def __init__(self, config):
+        raise errormod.ConfigurationError("testing error")
+
+
 @HOOK_REGISTRY.add_hook
 class TransactionError(TransactionHook):
     HOOK_GROUPS = frozenset(['configured'])
 
     def run(self, txn):
-        return ['txn:{}'.format(id(txn))]
+        return [NonError('txn:{}'.format(id(txn)), txn)]
 
 
 @HOOK_REGISTRY.add_hook
@@ -43,7 +58,8 @@ class PostingError(TransactionHook):
     HOOK_GROUPS = frozenset(['configured', 'posting'])
 
     def run(self, txn):
-        return ['post:{}'.format(id(post)) for post in txn.postings]
+        return [NonError('post:{}'.format(id(post)), txn)
+                for post in txn.postings]
 
 
 @pytest.fixture
@@ -65,8 +81,8 @@ def easy_entries():
 
 def map_errors(errors):
     retval = {}
-    for errkey in errors:
-        key, _, errid = errkey.partition(':')
+    for error in errors:
+        key, _, errid = error.message.partition(':')
         retval.setdefault(key, set()).add(errid)
     return retval