diff --git a/cypress/integration/modal.spec.ts b/cypress/integration/modal.spec.ts
new file mode 100644
index 0000000..3fbe6aa
--- /dev/null
+++ b/cypress/integration/modal.spec.ts
@@ -0,0 +1,98 @@
+describe('Modal', () => {
+  const clickCorrectNumberKey = () => {
+    cy.get('.bg-focused').children().children('.invisible').then(($correctNumberTile) => {
+      const correctNumber = $correctNumberTile.text()
+      cy.findByTestId(`number-key-${correctNumber}`).click()
+    })
+  }
+  
+  const clearWordplayByClicking = () => {
+    for (let i = 0; i < 2; i++) {
+      clickCorrectNumberKey();
+    }
+  }
+  
+  const clearStage = () => {
+    let level = 0;
+    for (const number of [5, 3, 3, 3, 1]) {
+      level++;
+      for (let i = 0; i < number; i++) {
+        cy.findByTestId('start-answering').click()
+        for (let j = 0; j < level; j++) {
+          clearWordplayByClicking();
+        }
+      }
+    }
+  }
+  
+  const clearReview = () => {
+    for (let i = 0; i < 10; i++) {
+      cy.findByTestId('start-answering').click()
+      for (let j = 0; j < 5; j++) {
+        clearWordplayByClicking();
+      }
+    }
+  }
+  
+  context('when the user clears stage 1', () => {
+    context('when the user clicks "move to stage select" button', () => {
+      it('moves to stage select page', () => {
+        cy.visit('/stages/1')
+        cy.wait(500)
+        clearStage()
+        cy.findByTestId('move-to-stage-select-button').click()
+        cy.url().should('eq', Cypress.config().baseUrl + '/')
+      })
+    })
+    
+    context('when the user clicks "move to next stage" button', () => {
+      it('moves to stage 2', () => {
+        cy.visit('/stages/1')
+        cy.wait(500)
+        clearStage()
+        cy.findByTestId('move-to-next-stage-button').click()
+        cy.wait(500)
+        cy.url().should('eq', Cypress.config().baseUrl + '/stages/2')
+      })
+    })
+  })
+  
+  context('when the user clears stage 10', () => {
+    context('when the user clicks "move to next stage" button', () => {
+      it('moves to review 1', () => {
+        cy.setLocalStorage('gorogoropanda.com/clearedStage', 'u51');
+        cy.visit('/stages/10')
+        cy.wait(500)
+        clearStage()
+        cy.findByTestId('move-to-next-stage-button').click()
+        cy.wait(500)
+        cy.url().should('eq', Cypress.config().baseUrl + '/reviews/1')
+      })
+    })
+  })
+  
+  context('when the user clears review 1', () => {
+    context('when the user clicks "move to stage select" button', () => {
+      it('moves to stage select page', () => {
+        cy.setLocalStorage('gorogoropanda.com/clearedStage', 'ttw');
+        cy.visit('/reviews/1')
+        cy.wait(500)
+        clearReview()
+        cy.findByTestId('move-to-stage-select-button').click()
+        cy.url().should('eq', Cypress.config().baseUrl + '/')
+      })
+    })
+    
+    context('when the user clicks "move to next stage" button', () => {
+      it('moves to the finale page', () => {
+        cy.setLocalStorage('gorogoropanda.com/clearedStage', 'ttw');
+        cy.visit('/reviews/1')
+        cy.wait(500)
+        clearReview()
+        cy.findByTestId('move-to-next-stage-button').click()
+        cy.wait(500)
+        cy.url().should('eq', Cypress.config().baseUrl + '/thank-you-for-playing')
+      })
+    })
+  })
+})
diff --git a/src/components/stages/Modal.tsx b/src/components/stages/Modal.tsx
index e149160..584dd3d 100644
--- a/src/components/stages/Modal.tsx
+++ b/src/components/stages/Modal.tsx
@@ -152,6 +152,7 @@ const Modal = memo(function Modal({
     <Link href="/">
       <a
         className={`${linkButtonClass} bg-gradient-to-b from-navy-darkest to-navy-darker sm:hover:bg-gray-500 active:bg-gray-500`}
+        data-testid="move-to-stage-select-button"
       >
         {buttonLight}
         ステージをえらぶ
@@ -171,6 +172,7 @@ const Modal = memo(function Modal({
     <Link href={nextStagePath()}>
       <a
         className={`${linkButtonClass} bg-gradient-to-b from-ok-dark to-ok-light sm:hover:bg-green-500 active:bg-green-500`}
+        data-testid="move-to-next-stage-button"
       >
         {buttonLight}
         次に進む