diff --git a/tests/backend/compare/compare-view.test.ts b/tests/backend/compare/compare-view.test.ts
index 04dc6be6..459bde68 100644
--- a/tests/backend/compare/compare-view.test.ts
+++ b/tests/backend/compare/compare-view.test.ts
@@ -30,8 +30,10 @@ import {
   loadCompareViewJsSomPayload,
   loadCompareViewTSomPayload
 } from '../../payload.js';
+import { initChartJS } from '../../../src/backend/compare/charts.js';
 
 initJestMatchers();
+initChartJS();
 
 const dataJsSOM = loadCompareViewJsSomPayload();
 const dataTruffleSOM = loadCompareViewTSomPayload();
diff --git a/tests/backend/compare/prep-data.test.ts b/tests/backend/compare/prep-data.test.ts
index 51c8cab6..8fa20709 100644
--- a/tests/backend/compare/prep-data.test.ts
+++ b/tests/backend/compare/prep-data.test.ts
@@ -46,8 +46,10 @@ import {
   loadCompareViewJsSomPayload,
   loadCompareViewTSomPayload
 } from '../../payload.js';
+import { initChartJS } from '../../../src/backend/compare/charts.js';
 
 initJestMatchers();
+initChartJS();
 
 describe('compareStringOrNull()', () => {
   it('should compare null and null', () => {