diff --git a/public/app/plugins/panel/candlestick/fields.test.ts b/public/app/plugins/panel/candlestick/fields.test.ts
index d5702bff7ef..a92b8ecaad4 100644
--- a/public/app/plugins/panel/candlestick/fields.test.ts
+++ b/public/app/plugins/panel/candlestick/fields.test.ts
@@ -162,7 +162,7 @@ describe('Candlestick data', () => {
       ],
       options,
       theme
-    );
+    )!;
 
     expect(info.open).toBeDefined();
     expect(info.close).toBeDefined();
@@ -224,7 +224,7 @@ describe('Candlestick data', () => {
       ],
       options,
       theme
-    );
+    )!;
 
     expect(info.open).toBeDefined();
     expect(info.close).toBeDefined();
@@ -278,7 +278,7 @@ describe('Candlestick data', () => {
       ],
       options,
       theme
-    );
+    )!;
 
     expect(info.open).toBeDefined();
     expect(info.close).toBeDefined();