diff --git a/__tests__/cases/non-parallel/pjax.commits-page.ts b/__tests__/cases/non-parallel/pjax.commits-page.ts
index 17632a1..a37310a 100644
--- a/__tests__/cases/non-parallel/pjax.commits-page.ts
+++ b/__tests__/cases/non-parallel/pjax.commits-page.ts
@@ -1,5 +1,7 @@
 import { expectToFind, expectToNotFind, sleep, waitForRedirect } from '../../utils'
 
+jest.retryTimes(3)
+
 describe(`in Gitako project page`, () => {
   beforeAll(() => page.goto('https://github.com/EnixCoda/Gitako/commits/develop'))
 
diff --git a/__tests__/cases/non-parallel/pjax.files-page.ts b/__tests__/cases/non-parallel/pjax.files-page.ts
index 7415333..fd0915c 100644
--- a/__tests__/cases/non-parallel/pjax.files-page.ts
+++ b/__tests__/cases/non-parallel/pjax.files-page.ts
@@ -1,8 +1,6 @@
-import {
-  expectToFind,
-  expectToNotFind,
-  sleep, waitForRedirect
-} from '../../utils'
+import { expectToFind, expectToNotFind, sleep, waitForRedirect } from '../../utils'
+
+jest.retryTimes(3)
 
 describe(`in Gitako project page`, () => {
   beforeAll(() => page.goto('https://github.com/EnixCoda/Gitako/tree/develop/src'))
diff --git a/__tests__/cases/non-parallel/pjax.general.ts b/__tests__/cases/non-parallel/pjax.general.ts
index 50ad411..a30f51a 100644
--- a/__tests__/cases/non-parallel/pjax.general.ts
+++ b/__tests__/cases/non-parallel/pjax.general.ts
@@ -3,9 +3,12 @@ import {
   expandFloatModeSidebar,
   patientClick,
   selectFileTreeItem,
-  sleep, waitForRedirect
+  sleep,
+  waitForRedirect,
 } from '../../utils'
 
+jest.retryTimes(3)
+
 describe(`in Gitako project page`, () => {
   beforeAll(() => page.goto('https://github.com/EnixCoda/Gitako/tree/develop/src'))
 
diff --git a/__tests__/cases/non-parallel/pjax.internal.ts b/__tests__/cases/non-parallel/pjax.internal.ts
index 7357412..d291540 100644
--- a/__tests__/cases/non-parallel/pjax.internal.ts
+++ b/__tests__/cases/non-parallel/pjax.internal.ts
@@ -8,6 +8,8 @@ import {
   waitForRedirect,
 } from '../../utils'
 
+jest.retryTimes(3)
+
 describe(`in Gitako project page`, () => {
   beforeAll(() => page.goto('https://github.com/EnixCoda/Gitako/tree/test/multiple-changes'))
 
diff --git a/__tests__/cases/non-parallel/project-page.gitako.ts b/__tests__/cases/non-parallel/project-page.gitako.ts
index f4dc902..109b2a4 100644
--- a/__tests__/cases/non-parallel/project-page.gitako.ts
+++ b/__tests__/cases/non-parallel/project-page.gitako.ts
@@ -3,9 +3,11 @@ import {
   expectToFind,
   expectToNotFind,
   scroll,
-  selectFileTreeItem
+  selectFileTreeItem,
 } from '../../utils'
 
+jest.retryTimes(3)
+
 describe(`in Gitako project page`, () => {
   beforeAll(() =>
     page.goto('https://github.com/EnixCoda/Gitako/tree/test/200-changed-files-200-lines-each'),