diff --git a/python/cuopt/cuopt/routing/utils.py b/python/cuopt/cuopt/routing/utils.py
index 942e0018a6..3060c8634e 100644
--- a/python/cuopt/cuopt/routing/utils.py
+++ b/python/cuopt/cuopt/routing/utils.py
@@ -789,9 +789,9 @@ def save_data_model_to_yaml(data_model, solver_settings, solution, fname):
     b_r_fp = solver_settings.get_best_results_file_path()
     b_r_i = solver_settings.get_best_results_interval()
     if b_r_fp:
-        if b_r_i:
-            yamldict.update({"best_result_path", b_r_fp})
-            yamldict.update({"best_result_interval", b_r_i})
+        if b_r_i is not None:
+            yamldict["best_result_path"] = b_r_fp
+            yamldict["best_result_interval"] = b_r_i
 
     if solution.get_status() == 0:
         sol_df = solution.get_route()
diff --git a/python/cuopt/cuopt/tests/routing/test_solver_settings.py b/python/cuopt/cuopt/tests/routing/test_solver_settings.py
index 0472b10a8b..8a79530332 100644
--- a/python/cuopt/cuopt/tests/routing/test_solver_settings.py
+++ b/python/cuopt/cuopt/tests/routing/test_solver_settings.py
@@ -2,6 +2,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 import numpy as np
+import yaml
 
 import cudf
 
@@ -52,7 +53,9 @@ def test_dump_config():
     """Test SolverSettings solve with config file"""
     s = routing.SolverSettings()
     config_file = "solver_cfg.yaml"
+    best_results_file = "best_results.txt"
     s.dump_config_file(config_file)
+    s.dump_best_results(best_results_file, 0)
     assert s.get_config_file_name() == config_file
 
     # Small example data model: 3 locations, 1 vehicle
@@ -66,6 +69,11 @@ def test_dump_config():
     routing_solution = routing.Solve(dm, s)
     assert routing_solution.get_status() == 0
 
+    with open(config_file) as f:
+        config = yaml.safe_load(f)
+    assert config["best_result_path"] == best_results_file
+    assert config["best_result_interval"] == 0
+
     # Load from written solver_cfg.yaml and solve again
     dm_from_yaml, s_from_yaml = utils.create_data_model_from_yaml(config_file)
     solution_from_yaml = routing.Solve(dm_from_yaml, s_from_yaml)