diff --git a/apps/backend/internal/auth/http_integration_test.go b/apps/backend/internal/auth/http_integration_test.go
index 81f1b8d..40c1a7f 100644
--- a/apps/backend/internal/auth/http_integration_test.go
+++ b/apps/backend/internal/auth/http_integration_test.go
@@ -17,6 +17,7 @@ import (
 	"github.com/get-drexa/drexa/internal/account"
 	"github.com/get-drexa/drexa/internal/auth"
 	"github.com/get-drexa/drexa/internal/database"
+	"github.com/get-drexa/drexa/internal/httperr"
 	"github.com/get-drexa/drexa/internal/organization"
 	"github.com/get-drexa/drexa/internal/password"
 	"github.com/get-drexa/drexa/internal/user"
@@ -247,7 +248,9 @@ func newAuthApp(t *testing.T, ctx context.Context) *fiber.App {
 		SecretKey: []byte("drexa-test-secret"),
 	})
 
-	app := fiber.New()
+	app := fiber.New(fiber.Config{
+		ErrorHandler: httperr.ErrorHandler,
+	})
 	api := app.Group("/api")
 	auth.NewHTTPHandler(authSvc, orgSvc, db, auth.CookieConfig{}).RegisterRoutes(api)
 
diff --git a/apps/backend/internal/organization/http_integration_test.go b/apps/backend/internal/organization/http_integration_test.go
index f09cfea..72637e1 100644
--- a/apps/backend/internal/organization/http_integration_test.go
+++ b/apps/backend/internal/organization/http_integration_test.go
@@ -18,6 +18,7 @@ import (
 	"github.com/get-drexa/drexa/internal/blob"
 	"github.com/get-drexa/drexa/internal/database"
 	"github.com/get-drexa/drexa/internal/drive"
+	"github.com/get-drexa/drexa/internal/httperr"
 	"github.com/get-drexa/drexa/internal/organization"
 	"github.com/get-drexa/drexa/internal/registration"
 	"github.com/get-drexa/drexa/internal/user"
@@ -91,7 +92,9 @@ func TestHTTP_OrganizationEndpoints(t *testing.T) {
 
 	authMiddleware := auth.NewAuthMiddleware(authSvc, db, auth.CookieConfig{})
 
-	app := fiber.New()
+	app := fiber.New(fiber.Config{
+		ErrorHandler: httperr.ErrorHandler,
+	})
 	api := app.Group("/api")
 	usersAPI := user.NewHTTPHandler(userSvc, db, authMiddleware).RegisterRoutes(api)
 
diff --git a/apps/backend/internal/registration/http_integration_test.go b/apps/backend/internal/registration/http_integration_test.go
index 30c6935..dba3111 100644
--- a/apps/backend/internal/registration/http_integration_test.go
+++ b/apps/backend/internal/registration/http_integration_test.go
@@ -19,6 +19,7 @@ import (
 	"github.com/get-drexa/drexa/internal/blob"
 	"github.com/get-drexa/drexa/internal/database"
 	"github.com/get-drexa/drexa/internal/drive"
+	"github.com/get-drexa/drexa/internal/httperr"
 	"github.com/get-drexa/drexa/internal/organization"
 	"github.com/get-drexa/drexa/internal/registration"
 	"github.com/get-drexa/drexa/internal/user"
@@ -76,7 +77,9 @@ func TestHTTP_RegisterAccount_TokenDeliveryBody(t *testing.T) {
 		SecretKey: []byte("drexa-test-secret"),
 	})
 
-	app := fiber.New()
+	app := fiber.New(fiber.Config{
+		ErrorHandler: httperr.ErrorHandler,
+	})
 	api := app.Group("/api")
 	registration.NewHTTPHandler(regSvc, authSvc, db, auth.CookieConfig{}).RegisterRoutes(api)
 
@@ -176,7 +179,9 @@ func TestHTTP_RegisterAccount_TokenDeliveryCookie(t *testing.T) {
 		SecretKey: []byte("drexa-test-secret"),
 	})
 
-	app := fiber.New()
+	app := fiber.New(fiber.Config{
+		ErrorHandler: httperr.ErrorHandler,
+	})
 	api := app.Group("/api")
 	registration.NewHTTPHandler(regSvc, authSvc, db, auth.CookieConfig{}).RegisterRoutes(api)