diff --git a/test/unit/file-list.spec.js b/test/unit/file-list.spec.js
index 716d39a1d..ba2617b2b 100644
--- a/test/unit/file-list.spec.js
+++ b/test/unit/file-list.spec.js
@@ -596,13 +596,13 @@ describe('FileList', () => {
       emitter.on('file_list_modified', modified)
 
       return list.refresh().then((files) => {
-        mockFs._touchFile('/some/b.js', '2020-01-01')
+        mockFs._touchFile('/some/b.js', '3020-01-01')
         modified.resetHistory()
 
         return list.changeFile('/some/b.js').then((files) => {
           clock.tick(101)
           expect(modified).to.have.been.calledOnce
-          expect(findFile('/some/b.js', files.served).mtime).to.be.eql(new Date('2020-01-01'))
+          expect(findFile('/some/b.js', files.served).mtime).to.be.eql(new Date('3020-01-01'))
         })
       })
     })
@@ -615,7 +615,7 @@ describe('FileList', () => {
       emitter.on('file_list_modified', modified)
 
       return list.refresh().then((files) => {
-        mockFs._touchFile('/some/b.js', '2020-01-01')
+        mockFs._touchFile('/some/b.js', '3020-01-01')
         modified.resetHistory()
 
         return list.changeFile('/some/b.js').then(() => {
@@ -665,7 +665,7 @@ describe('FileList', () => {
 
       return list.refresh().then((files) => {
         preprocess.resetHistory()
-        mockFs._touchFile('/some/a.js', '2020-01-01')
+        mockFs._touchFile('/some/a.js', '3020-01-01')
         return list.changeFile('/some/a.js').then(() => {
           expect(preprocess).to.have.been.called
           expect(preprocess.lastCall.args[0]).to.have.property('path', '/some/a.js')
@@ -855,7 +855,7 @@ describe('FileList', () => {
           expect(modified).to.not.have.been.called
 
           // Modify file, must change mtime too, or change is ignored
-          mockFs._touchFile('/some/0.js', '2020-01-01')
+          mockFs._touchFile('/some/0.js', '3020-01-01')
           list.changeFile('/some/0.js').then(() => {
             // Ensure that the debounce timer was reset
             clock.tick(2)
@@ -870,7 +870,7 @@ describe('FileList', () => {
 
             // Modify file (one hour later mtime)
             expect(modified).to.have.been.calledOnce
-            mockFs._touchFile('/some/0.js', '2020-01-02')
+            mockFs._touchFile('/some/0.js', '3020-01-02')
             list.changeFile('/some/0.js').then(() => {
               clock.tick(99)
               expect(modified).to.have.been.calledOnce
@@ -892,7 +892,7 @@ describe('FileList', () => {
 
       return list.refresh().then((files) => {
         modified.resetHistory()
-        mockFs._touchFile('/some/b.js', '2020-01-01')
+        mockFs._touchFile('/some/b.js', '3020-01-01')
         list.changeFile('/some/b.js')
         list.removeFile('/some/a.js') // /some/b.js, /a.txt
         list.removeFile('/a.txt') // /some/b.js
@@ -901,7 +901,7 @@ describe('FileList', () => {
           // /some/0.js, /some/b.js, /a.txt
           clock.tick(99)
           expect(modified).to.not.have.been.called
-          mockFs._touchFile('/a.txt', '2020-01-01')
+          mockFs._touchFile('/a.txt', '3020-01-01')
           list.changeFile('/a.txt').then(() => {
             clock.tick(2)
             expect(modified).to.not.have.been.called