diff --git a/nucypher/policy/conditions/_utils.py b/nucypher/policy/conditions/_utils.py
index 2470269a4..5b4281ab0 100644
--- a/nucypher/policy/conditions/_utils.py
+++ b/nucypher/policy/conditions/_utils.py
@@ -92,7 +92,7 @@ def _deserialize_condition_lingo(data: Union[str, Dict[str, str]]) -> Union['Ope
 
 def evaluate_conditions(
     lingo: "ConditionLingo",
-    providers: Optional[Dict[str, BaseProvider]] = None,
+    providers: Optional[Dict[int, BaseProvider]] = None,
     context: Optional[Dict[Union[str, int], Union[str, int]]] = None,
     log: Logger = __LOGGER,
 ) -> Optional[EvalError]:
diff --git a/tests/unit/conditions/test_evaluate_conditions.py b/tests/unit/conditions/test_evaluate_conditions.py
new file mode 100644
index 000000000..28bfc9afb
--- /dev/null
+++ b/tests/unit/conditions/test_evaluate_conditions.py
@@ -0,0 +1,82 @@
+"""
+ This file is part of nucypher.
+
+ nucypher 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.
+
+ nucypher 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 nucypher.  If not, see <https://www.gnu.org/licenses/>.
+"""
+from http import HTTPStatus
+from typing import List, Tuple, Type
+from unittest.mock import Mock
+
+import pytest
+from web3.providers import BaseProvider
+
+from nucypher.policy.conditions._utils import evaluate_conditions
+from nucypher.policy.conditions.exceptions import *
+
+FAILURE_CASE_EXCEPTION_CODE_MATCHING = [
+    # (exception, constructor parameters, expected status code)
+    (ReturnValueEvaluationError, [], HTTPStatus.BAD_REQUEST),
+    (InvalidCondition, [], HTTPStatus.BAD_REQUEST),
+    (RequiredContextVariable, [], HTTPStatus.BAD_REQUEST),
+    (InvalidContextVariableData, [], HTTPStatus.BAD_REQUEST),
+    (ContextVariableVerificationFailed, [], HTTPStatus.FORBIDDEN),
+    (NoConnectionToChain, [1], HTTPStatus.NOT_IMPLEMENTED),
+    (ConditionEvaluationFailed, [], HTTPStatus.BAD_REQUEST),
+    (Exception, [], HTTPStatus.INTERNAL_SERVER_ERROR),
+]
+
+
+@pytest.mark.parametrize("failure_case", FAILURE_CASE_EXCEPTION_CODE_MATCHING)
+def test_evaluate_condition_exception_cases(
+    failure_case: Tuple[Type[Exception], List, int]
+):
+    exception_class = failure_case[0]
+    exception_constructor_params = failure_case[1]
+    expected_status_code = failure_case[2]
+
+    condition_lingo = Mock()
+    condition_lingo.eval.side_effect = exception_class(*exception_constructor_params)
+
+    eval_error = evaluate_conditions(
+        lingo=condition_lingo
+    )  # provider and context default to empty dicts
+    assert eval_error
+    assert eval_error.status_code == expected_status_code
+
+
+def test_evaluate_condition_eval_returns_false():
+    condition_lingo = Mock()
+    condition_lingo.eval.return_value = False
+    eval_error = evaluate_conditions(
+        lingo=condition_lingo,
+        providers={1: Mock(spec=BaseProvider)},  # fake provider
+        context={"key": "value"},  # fake context
+    )
+    assert eval_error
+    assert eval_error.status_code == HTTPStatus.FORBIDDEN
+
+
+def test_evaluate_condition_eval_returns_true():
+    condition_lingo = Mock()
+    condition_lingo.eval.return_value = True
+    eval_error = evaluate_conditions(
+        lingo=condition_lingo,
+        providers={
+            1: Mock(spec=BaseProvider),
+            2: Mock(spec=BaseProvider),
+        },  # multiple fake provider
+        context={"key1": "value1", "key2": "value2"},  # multiple values in fake context
+    )
+
+    assert not eval_error