diff --git a/spec/javascripts/filtered_search/filtered_search_manager_spec.js.es6 b/spec/javascripts/filtered_search/filtered_search_manager_spec.js.es6
index c8b5c2b36ad..a508dacf7f0 100644
--- a/spec/javascripts/filtered_search/filtered_search_manager_spec.js.es6
+++ b/spec/javascripts/filtered_search/filtered_search_manager_spec.js.es6
@@ -23,6 +23,7 @@
         `);
 
         spyOn(gl.FilteredSearchManager.prototype, 'bindEvents').and.callFake(() => {});
+        spyOn(gl.FilteredSearchManager.prototype, 'cleanup').and.callFake(() => {});
         spyOn(gl.FilteredSearchManager.prototype, 'loadSearchParamsFromURL').and.callFake(() => {});
         spyOn(gl.FilteredSearchDropdownManager.prototype, 'setDropdown').and.callFake(() => {});
         spyOn(gl.utils, 'getParameterByName').and.returnValue(null);