diff --git a/src/authentication/__tests__/abax-auth.test.ts b/src/authentication/__tests__/abax-auth.test.ts
index ede668f..287be6a 100644
--- a/src/authentication/__tests__/abax-auth.test.ts
+++ b/src/authentication/__tests__/abax-auth.test.ts
@@ -69,7 +69,7 @@ describe('abax auth', async () => {
     `);
   });
 
-  it('should refresh access token automatically', async () => {
+  it('should refresh expired access token', async () => {
     const date = new Date(2000, 1, 1, 13);
     vi.setSystemTime(date);
 
@@ -116,4 +116,101 @@ describe('abax auth', async () => {
       }
     `);
   });
+
+  it('should refresh access token with less than 60 seconds left ', async () => {
+    const date = new Date(2000, 1, 1, 13);
+    vi.setSystemTime(date);
+
+    const auth = new AbaxAuth({
+      clientId: 'not-a-secret',
+      clientSecret: 'not-a-secret',
+      redirectUri: 'https://redirect.uri',
+    });
+
+    const refreshFun = vi.spyOn(auth, 'refreshCredentials');
+
+    auth.setCredentials({
+      accessToken: 'access_token',
+      expiresAt: new Date(2000, 1, 1, 13, 0, 30),
+      refreshToken: 'refresh_token',
+      idToken: 'id_token',
+      tokenType: 'Bearer',
+    });
+
+    agent
+      .get('https://identity.abax.cloud')
+      .intercept({
+        path: '/connect/token',
+        method: 'POST',
+      })
+      .reply(200, {
+        access_token: 'new_access_token',
+        expires_in: 3600,
+        id_token: 'id_token',
+        token_type: 'Bearer',
+        refresh_token: 'new_refresh_token',
+      });
+
+    const token = await auth.getAccessToken();
+    expect(refreshFun).toHaveBeenCalled();
+    expect(token).toBe('new_access_token');
+    expect(auth.getCredentials()).toMatchInlineSnapshot(`
+      {
+        "accessToken": "new_access_token",
+        "expiresAt": 2000-02-01T14:00:00.000Z,
+        "idToken": "id_token",
+        "refreshToken": "new_refresh_token",
+        "tokenType": "Bearer",
+      }
+    `);
+  });
+
+  it('should refresh access token with custom minimumTokenLifetime', async () => {
+    const date = new Date(2000, 1, 1, 13);
+    vi.setSystemTime(date);
+
+    const auth = new AbaxAuth({
+      clientId: 'not-a-secret',
+      clientSecret: 'not-a-secret',
+      redirectUri: 'https://redirect.uri',
+      minimumTokenLifetime: 1200,
+    });
+
+    const refreshFun = vi.spyOn(auth, 'refreshCredentials');
+
+    auth.setCredentials({
+      accessToken: 'access_token',
+      expiresAt: new Date(2000, 1, 1, 13, 19),
+      refreshToken: 'refresh_token',
+      idToken: 'id_token',
+      tokenType: 'Bearer',
+    });
+
+    agent
+      .get('https://identity.abax.cloud')
+      .intercept({
+        path: '/connect/token',
+        method: 'POST',
+      })
+      .reply(200, {
+        access_token: 'new_access_token',
+        expires_in: 3600,
+        id_token: 'id_token',
+        token_type: 'Bearer',
+        refresh_token: 'new_refresh_token',
+      });
+
+    const token = await auth.getAccessToken();
+    expect(refreshFun).toHaveBeenCalled();
+    expect(token).toBe('new_access_token');
+    expect(auth.getCredentials()).toMatchInlineSnapshot(`
+      {
+        "accessToken": "new_access_token",
+        "expiresAt": 2000-02-01T14:00:00.000Z,
+        "idToken": "id_token",
+        "refreshToken": "new_refresh_token",
+        "tokenType": "Bearer",
+      }
+    `);
+  });
 });