diff --git a/packages/grafana-data/src/dataframe/FieldCache.test.ts b/packages/grafana-data/src/dataframe/FieldCache.test.ts
index c35d89961ef..80423614fb2 100644
--- a/packages/grafana-data/src/dataframe/FieldCache.test.ts
+++ b/packages/grafana-data/src/dataframe/FieldCache.test.ts
@@ -69,24 +69,33 @@ describe('FieldCache', () => {
   });
 
   describe('field retrieval', () => {
-    const frame = toDataFrame({
-      fields: [
-        { name: 'time', type: FieldType.time, values: [100, 200, 300] },
-        { name: 'name', type: FieldType.string, values: ['a', 'b', 'c'] },
-        { name: 'value', type: FieldType.number, values: [1, 2, 3] },
-        { name: 'value', type: FieldType.number, values: [4, 5, 6] },
-      ],
+    let fieldCache: FieldCache;
+
+    beforeEach(() => {
+      const frame = toDataFrame({
+        fields: [
+          { name: 'time', type: FieldType.time, values: [100, 200, 300] },
+          { name: 'name', type: FieldType.string, values: ['a', 'b', 'c'] },
+          { name: 'value', type: FieldType.number, values: [1, 2, 3] },
+          { name: 'value', type: FieldType.number, values: [4, 5, 6] },
+        ],
+      });
+
+      // Because we're using duplicate field names in the test case, we need to disable the warning,
+      // so it doesn't show up in the test output
+      const consoleWarnSpy = jest.spyOn(console, 'warn').mockImplementation(() => {});
+      fieldCache = new FieldCache(frame);
+      consoleWarnSpy.mockRestore();
     });
-    const ext = new FieldCache(frame);
 
     it('should get the first field with a duplicate name', () => {
-      const field = ext.getFieldByName('value');
+      const field = fieldCache.getFieldByName('value');
       expect(field!.name).toEqual('value');
       expect(field!.values.toArray()).toEqual([1, 2, 3]);
     });
 
     it('should return index of the field', () => {
-      const field = ext.getFirstFieldOfType(FieldType.number);
+      const field = fieldCache.getFirstFieldOfType(FieldType.number);
       expect(field!.index).toEqual(2);
     });
   });