diff --git a/tests/test_grid_based_sweep_coverage_path_planner.py b/tests/test_grid_based_sweep_coverage_path_planner.py
index c4401ebd..3caaac89 100644
--- a/tests/test_grid_based_sweep_coverage_path_planner.py
+++ b/tests/test_grid_based_sweep_coverage_path_planner.py
@@ -3,6 +3,7 @@ import sys
 from unittest import TestCase
 
 sys.path.append(os.path.dirname(os.path.abspath(__file__)) + "/../PathPlanning/GridBasedSweepCPP")
+sys.path.append(os.path.dirname(os.path.abspath(__file__)) + "/../Mapping/grid_map_lib")
 try:
     import grid_based_sweep_coverage_path_planner
 except: