diff --git a/server/models/index.js b/server/models/index.js
index 10e0e57..b4bee75 100644
--- a/server/models/index.js
+++ b/server/models/index.js
@@ -8,10 +8,10 @@ if (process.env.NODE_ENV !== 'test') {
 // Configure database based on environment
 let sequelize;
 if (process.env.NODE_ENV === 'test') {
-  // Use SQLite in-memory database for testing
+  // Use SQLite file database for testing to allow sharing between modules
   sequelize = new Sequelize({
     dialect: 'sqlite',
-    storage: ':memory:',
+    storage: './test.db',
     logging: false
   });
 } else {
diff --git a/server/tests/setup.js b/server/tests/setup.js
index 4bd8db1..8399ba2 100644
--- a/server/tests/setup.js
+++ b/server/tests/setup.js
@@ -20,7 +20,7 @@ afterEach(() => {
 // Test database configuration
 const testDatabase = {
   dialect: 'sqlite',
-  storage: ':memory:', // In-memory database for fast tests
+  storage: './test.db', // Use same file database as models/index.js
   logging: false, // Disable SQL logging in tests
   sync: { force: true } // Always recreate tables for tests
 };