diff --git a/backend/tests/login.test.ts b/backend/tests/login.test.ts
index 18ace5c..1cdf964 100644
--- a/backend/tests/login.test.ts
+++ b/backend/tests/login.test.ts
@@ -53,7 +53,7 @@ describe("Tests", () => {
     const { status, body } = await request(app).post("/auth/register").send({
         username: "shinjisatoo",
         password: "testpassword",
-        email: "longseason1996@gmail.com",
+        email: "longseason1997@gmail.com",
         userType: "ATTENDEE",
       });
   
diff --git a/backend/tests/register.test.ts b/backend/tests/register.test.ts
index cef43b6..12e81a8 100644
--- a/backend/tests/register.test.ts
+++ b/backend/tests/register.test.ts
@@ -18,7 +18,7 @@ describe("Tests", () => {
     const { status, body } = await request(app).post("/auth/register").send({
       username: "shinjisatoo",
       password: "testpassword",
-      email: "longseason1996@gmail.com",
+      email: "longseason1997@gmail.com",
       userType: "ATTENDEE",
     });
 
diff --git a/backend/vitest.config.integration.ts b/backend/vitest.config.integration.ts
index 0d6261f..c18baf9 100644
--- a/backend/vitest.config.integration.ts
+++ b/backend/vitest.config.integration.ts
@@ -6,6 +6,7 @@ export default defineConfig({
     poolOptions: {
       threads: {
         maxThreads: 1,
+        singleThread: true
       }
     },
     setupFiles: ['./tests/helpers/setup.ts']