diff --git a/public/app/plugins/panel/candlestick/fields.test.ts b/public/app/plugins/panel/candlestick/fields.test.ts
index 82e552b3e6c..01e8abd6e7b 100644
--- a/public/app/plugins/panel/candlestick/fields.test.ts
+++ b/public/app/plugins/panel/candlestick/fields.test.ts
@@ -163,7 +163,7 @@ describe('Candlestick data', () => {
       ],
       options,
       theme
-    );
+    )!;
 
     expect(info.open).toBeDefined();
     expect(info.close).toBeDefined();
@@ -225,7 +225,7 @@ describe('Candlestick data', () => {
       ],
       options,
       theme
-    );
+    )!;
 
     expect(info.open).toBeDefined();
     expect(info.close).toBeDefined();
@@ -279,7 +279,7 @@ describe('Candlestick data', () => {
       ],
       options,
       theme
-    );
+    )!;
 
     expect(info.open).toBeDefined();
     expect(info.close).toBeDefined();