diff --git a/src/__test__/redux/reducers/samplesReducer.test.js b/src/__test__/redux/reducers/samplesReducer.test.js
index f88770da75..d839040d2d 100644
--- a/src/__test__/redux/reducers/samplesReducer.test.js
+++ b/src/__test__/redux/reducers/samplesReducer.test.js
@@ -111,7 +111,10 @@ describe('samplesReducer', () => {
     });
 
     expect(newState[sample1.uuid].fileNames).toEqual([fileName]);
-    expect(newState[sample1.uuid].files[fileName]).toEqual(mockFile);
+    expect(newState[sample1.uuid].files[fileName]).toEqual({
+      ...mockFile,
+      lastModified: 'newLastModified',
+    });
     expect(newState).toMatchSnapshot();
   });
 
@@ -139,7 +142,10 @@ describe('samplesReducer', () => {
     });
 
     expect(newState[sample1.uuid].fileNames).toEqual([fileName]);
-    expect(newState[sample1.uuid].files[fileName]).toEqual(mockFile);
+    expect(newState[sample1.uuid].files[fileName]).toEqual({
+      ...mockFile,
+      lastModified: 'newLastModified',
+    });
     expect(newState).toMatchSnapshot();
   });