diff --git a/veza-backend-api/internal/handlers/upload_test.go b/veza-backend-api/internal/handlers/upload_test.go
index 9c5fcf676..6c23966e4 100644
--- a/veza-backend-api/internal/handlers/upload_test.go
+++ b/veza-backend-api/internal/handlers/upload_test.go
@@ -17,6 +17,7 @@ import (
 	"github.com/google/uuid"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/mock"
+	"github.com/stretchr/testify/require"
 	"go.uber.org/zap"
 )
 
@@ -301,6 +302,10 @@ func TestGetUploadStats_Success(t *testing.T) {
 	assert.Equal(t, http.StatusOK, w.Code)
 
 	var resp map[string]interface{}
-	json.Unmarshal(w.Body.Bytes(), &resp)
-	assert.Equal(t, float64(5), resp["stats"].(map[string]interface{})["total_uploads"])
+	require.NoError(t, json.Unmarshal(w.Body.Bytes(), &resp))
+	data, ok := resp["data"].(map[string]interface{})
+	require.True(t, ok, "response should have data field")
+	stats, statsOk := data["stats"].(map[string]interface{})
+	require.True(t, statsOk, "data should have stats field")
+	assert.Equal(t, float64(5), stats["total_uploads"])
 }
diff --git a/veza-backend-api/internal/services/user_service_search.go b/veza-backend-api/internal/services/user_service_search.go
index 4038af8d0..6433e3489 100644
--- a/veza-backend-api/internal/services/user_service_search.go
+++ b/veza-backend-api/internal/services/user_service_search.go
@@ -9,6 +9,15 @@ import (
 	"veza-backend-api/internal/models"
 )
 
+// buildSearchClause returns the SQL fragment for case-insensitive search.
+// SQLite: LIKE (case-insensitive for ASCII), PostgreSQL: ILIKE
+func (s *UserService) buildSearchClause() string {
+	if s.db != nil && s.db.Dialector.Name() == "sqlite" {
+		return "username LIKE ? OR email LIKE ? OR first_name LIKE ? OR last_name LIKE ?"
+	}
+	return "username ILIKE ? OR email ILIKE ? OR first_name ILIKE ? OR last_name ILIKE ?"
+}
+
 // SearchUsersParams représente les paramètres de recherche d'utilisateurs
 // BE-API-008: Implement user search endpoint
 type SearchUsersParams struct {
@@ -43,7 +52,7 @@ func (s *UserService) SearchUsers(ctx context.Context, params SearchUsersParams)
 	if params.Query != "" {
 		searchPattern := "%" + params.Query + "%"
 		query = query.Where(
-			"username ILIKE ? OR email ILIKE ? OR first_name ILIKE ? OR last_name ILIKE ?",
+			s.buildSearchClause(),
 			searchPattern, searchPattern, searchPattern, searchPattern,
 		)
 	}
@@ -118,7 +127,7 @@ func (s *UserService) ListUsers(ctx context.Context, params ListUsersParams) ([]
 	if params.Search != "" {
 		searchPattern := "%" + params.Search + "%"
 		query = query.Where(
-			"username ILIKE ? OR email ILIKE ? OR first_name ILIKE ? OR last_name ILIKE ?",
+			s.buildSearchClause(),
 			searchPattern, searchPattern, searchPattern, searchPattern,
 		)
 	}