diff --git a/cmd/gateway/main.go b/cmd/gateway/main.go
index 2b34553..7aa627a 100644
--- a/cmd/gateway/main.go
+++ b/cmd/gateway/main.go
@@ -37,7 +37,7 @@ func main() {
 	http.HandleFunc("/register", gateway.Register(client))
 	http.HandleFunc("/login", gateway.Login(client))
 	http.HandleFunc("/authorize", gateway.Authorize(client, serverSecret))
-	http.HandleFunc("/reset_password", gateway.ResetPassword(client))
+	http.HandleFunc("/reset_password", gateway.ResetPassword(client, port))
 	http.HandleFunc("/change_password", gateway.ChangePassword(client))
 
 	// Listen for requests.
diff --git a/flake.nix b/flake.nix
index d71be06..b322b1c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -8,6 +8,7 @@
   outputs = inputs @ { self, nixpkgs, ... }:
     inputs.flake-utils.lib.eachDefaultSystem (system:
       let pkgs = nixpkgs.legacyPackages.${system};
+          myGo = "${pkgs.go}/bin/go";
           myProtoc = "${pkgs.grpc-tools}/bin/protoc";
           myUsersDir = "$MY_USERS_DIR";
           myUsersBuild = pkgs.writeShellScriptBin "users-build" ''
@@ -16,6 +17,13 @@
                         --go_out=. --go_opt=paths=source_relative \
                         --go-grpc_out=. --go-grpc_opt=paths=source_relative \
                         proto/users.proto &&
+            ${myGo} build -o ${myUsersDir}/bin/users-server ${myUsersDir}/cmd/server/main.go &&
+            ${myGo} build -o ${myUsersDir}/bin/users-gateway ${myUsersDir}/cmd/gateway/main.go &&
+            popd > /dev/null
+          '';
+          myUsersTest = pkgs.writeShellScriptBin "users-test" ''
+            pushd ${myUsersDir} > /dev/null &&
+            ${pkgs.parallel}/bin/parallel :: ${myUsersDir}/bin/users-server ${myUsersDir}/bin/users-gateway
             popd > /dev/null
           '';
       in
@@ -33,10 +41,15 @@
               grpc-tools
 
               myUsersBuild
+              myUsersTest
             ];
 
             shellHook = ''
               export MY_USERS_DIR="$(pwd)"
+              export GO111MODULE=on
+              export GOPATH=$XDG_DATA_HOME/go
+              export PATH=$GOPATH/bin:$PATH
+              export PATH=$MY_USERS_DIR/bin:$PATH
             '';
           };
         }
diff --git a/gateway/gateway.go b/gateway/gateway.go
index 0ba5fdf..ab17126 100644
--- a/gateway/gateway.go
+++ b/gateway/gateway.go
@@ -71,7 +71,7 @@ func Authorize(client proto.UsersClient, serverSecret *string) http.HandlerFunc
 	})
 }
 
-func ResetPassword(client proto.UsersClient) http.HandlerFunc {
+func ResetPassword(client proto.UsersClient, port *int) http.HandlerFunc {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		res, err := client.ResetPassword(r.Context(), &proto.ResetPasswordRequest{
 			Form: &proto.UserForm{