diff --git a/moto/cloudformation/models.py b/moto/cloudformation/models.py
index 0ae5d1ae4..b32d63b32 100644
--- a/moto/cloudformation/models.py
+++ b/moto/cloudformation/models.py
@@ -677,6 +677,8 @@ class CloudFormationBackend(BaseBackend):
 
     def list_stack_resources(self, stack_name_or_id):
         stack = self.get_stack(stack_name_or_id)
+        if stack is None:
+            return None
         return stack.stack_resources
 
     def delete_stack(self, name_or_stack_id):
diff --git a/moto/cloudformation/responses.py b/moto/cloudformation/responses.py
index bf68a6325..77a3051fd 100644
--- a/moto/cloudformation/responses.py
+++ b/moto/cloudformation/responses.py
@@ -229,6 +229,9 @@ class CloudFormationResponse(BaseResponse):
         stack_name_or_id = self._get_param("StackName")
         resources = self.cloudformation_backend.list_stack_resources(stack_name_or_id)
 
+        if resources is None:
+            raise ValidationError(stack_name_or_id)
+
         template = self.response_template(LIST_STACKS_RESOURCES_RESPONSE)
         return template.render(resources=resources)
 
diff --git a/tests/test_cloudformation/test_cloudformation_stack_crud_boto3.py b/tests/test_cloudformation/test_cloudformation_stack_crud_boto3.py
index 40fb2d669..b7e86a1d5 100644
--- a/tests/test_cloudformation/test_cloudformation_stack_crud_boto3.py
+++ b/tests/test_cloudformation/test_cloudformation_stack_crud_boto3.py
@@ -522,6 +522,13 @@ def test_boto3_list_stack_set_operations():
     list_operation["Summaries"][-1]["Action"].should.equal("UPDATE")
 
 
+@mock_cloudformation
+def test_boto3_bad_list_stack_resources():
+    cf_conn = boto3.client("cloudformation", region_name="us-east-1")
+    with assert_raises(ClientError):
+        cf_conn.list_stack_resources(StackName="test_stack_set")
+
+
 @mock_cloudformation
 def test_boto3_delete_stack_set():
     cf_conn = boto3.client("cloudformation", region_name="us-east-1")