diff --git a/internal/infrastructure/http/auth_integration_test.go b/internal/infrastructure/http/auth_integration_test.go
index e703ddf..688178d 100644
--- a/internal/infrastructure/http/auth_integration_test.go
+++ b/internal/infrastructure/http/auth_integration_test.go
@@ -12,7 +12,7 @@ func TestAuthFlow(t *testing.T) {
 	t.Run("Register new user", func(t *testing.T) {
 		reqBody := RegisterRequest{
 			Email:    "test@example.com",
-			Password: "password123",
+			Password: "Password123!",
 			Timezone: "UTC",
 		}
 
@@ -36,7 +36,7 @@ func TestAuthFlow(t *testing.T) {
 	t.Run("Register duplicate email", func(t *testing.T) {
 		reqBody := RegisterRequest{
 			Email:    "duplicate@example.com",
-			Password: "password123",
+			Password: "Password123!",
 			Timezone: "UTC",
 		}
 
@@ -52,7 +52,7 @@ func TestAuthFlow(t *testing.T) {
 	t.Run("Register with invalid email", func(t *testing.T) {
 		reqBody := RegisterRequest{
 			Email:    "invalid-email",
-			Password: "password123",
+			Password: "Password123!",
 			Timezone: "UTC",
 		}
 
@@ -80,14 +80,14 @@ func TestAuthFlow(t *testing.T) {
 	t.Run("Login with valid credentials", func(t *testing.T) {
 		registerBody := RegisterRequest{
 			Email:    "login@example.com",
-			Password: "password123",
+			Password: "Password123!",
 			Timezone: "UTC",
 		}
 		makeRequest(t, *ts.Router, "POST", "/api/v1/auth/register", registerBody, "")
 
 		loginBody := LoginRequest{
 			Email:    "login@example.com",
-			Password: "password123",
+			Password: "Password123!",
 		}
 
 		rr := makeRequest(t, *ts.Router, "POST", "/api/v1/auth/login", loginBody, "")
@@ -107,7 +107,7 @@ func TestAuthFlow(t *testing.T) {
 	t.Run("Login with invalid password", func(t *testing.T) {
 		registerBody := RegisterRequest{
 			Email:    "wrongpass@example.com",
-			Password: "password123",
+			Password: "Password123!",
 			Timezone: "UTC",
 		}
 		makeRequest(t, *ts.Router, "POST", "/api/v1/auth/register", registerBody, "")
@@ -127,7 +127,7 @@ func TestAuthFlow(t *testing.T) {
 	t.Run("Login with non-existent user", func(t *testing.T) {
 		loginBody := LoginRequest{
 			Email:    "nonexistent@example.com",
-			Password: "password123",
+			Password: "Password123!",
 		}
 
 		rr := makeRequest(t, *ts.Router, "POST", "/api/v1/auth/login", loginBody, "")
diff --git a/internal/infrastructure/http/habit_entries_integration_test.go b/internal/infrastructure/http/habit_entries_integration_test.go
index 97a868b..b377742 100644
--- a/internal/infrastructure/http/habit_entries_integration_test.go
+++ b/internal/infrastructure/http/habit_entries_integration_test.go
@@ -12,7 +12,7 @@ func TestHabitEntriesFlow(t *testing.T) {
 
 	registerBody := RegisterRequest{
 		Email:    "entryuser@example.com",
-		Password: "password123",
+		Password: "Password123!",
 		Timezone: "UTC",
 	}
 	rr := makeRequest(t, *ts.Router, "POST", "/api/v1/auth/register", registerBody, "")
diff --git a/internal/infrastructure/http/habit_integration_test.go b/internal/infrastructure/http/habit_integration_test.go
index 2356686..86fef53 100644
--- a/internal/infrastructure/http/habit_integration_test.go
+++ b/internal/infrastructure/http/habit_integration_test.go
@@ -11,7 +11,7 @@ func TestHabitCRUDFlow(t *testing.T) {
 
 	registerBody := RegisterRequest{
 		Email:    "habituser@example.com",
-		Password: "password123",
+		Password: "Password123!",
 		Timezone: "UTC",
 	}
 	rr := makeRequest(t, *ts.Router, "POST", "/api/v1/auth/register", registerBody, "")
@@ -133,7 +133,7 @@ func TestHabitCRUDFlow(t *testing.T) {
 	t.Run("Access other user's habit", func(t *testing.T) {
 		registerBody := RegisterRequest{
 			Email:    "otheruser@example.com",
-			Password: "password123",
+			Password: "Password123!",
 			Timezone: "UTC",
 		}
 		rr := makeRequest(t, *ts.Router, "POST", "/api/v1/auth/register", registerBody, "")
diff --git a/internal/infrastructure/persistence/sqlite/migrations_test.go b/internal/infrastructure/persistence/sqlite/migrations_test.go
index ccc5168..065550d 100644
--- a/internal/infrastructure/persistence/sqlite/migrations_test.go
+++ b/internal/infrastructure/persistence/sqlite/migrations_test.go
@@ -94,7 +94,7 @@ func TestHabitEntriesTableSchema(t *testing.T) {
 		t.Fatalf("RunMigrations failed: %v", err)
 	}
 
-	columns := []string{"id", "habit_id", "scheduled_date", "completed_at", "value", "deleted_at"}
+	columns := []string{"id", "habit_id", "scheduled_date", "completed_at", "value"}
 	for _, col := range columns {
 		query := "SELECT " + col + " FROM habit_entries LIMIT 0"
 		rows, err := db.Query(query)