diff --git a/tests/providers/aws/services/iam/iam_policy_passrole_to_bedrock_agentcore_restricted/iam_policy_passrole_to_bedrock_agentcore_restricted_test.py b/tests/providers/aws/services/iam/iam_policy_passrole_to_bedrock_agentcore_restricted/iam_policy_passrole_to_bedrock_agentcore_restricted_test.py
index 04962eade6..1e3f1eb362 100644
--- a/tests/providers/aws/services/iam/iam_policy_passrole_to_bedrock_agentcore_restricted/iam_policy_passrole_to_bedrock_agentcore_restricted_test.py
+++ b/tests/providers/aws/services/iam/iam_policy_passrole_to_bedrock_agentcore_restricted/iam_policy_passrole_to_bedrock_agentcore_restricted_test.py
@@ -105,7 +105,8 @@ def _run(policies: list, scan_unused_services: bool = True):
     iam_client = mock.MagicMock()
     iam_client.policies = {policy.arn: policy for policy in policies}
     iam_client.region = AWS_REGION_US_EAST_1
-    iam_client.provider.scan_unused_services = scan_unused_services
+    # Own mock: other test files set MagicMock.provider at class level to a real AwsProvider.
+    iam_client.provider = mock.MagicMock(scan_unused_services=scan_unused_services)
 
     aws_provider = set_mocked_aws_provider([AWS_REGION_US_EAST_1])