diff --git a/web/src/settings_emoji.js b/web/src/settings_emoji.js
index 7dd8386335..ac21247ac1 100644
--- a/web/src/settings_emoji.js
+++ b/web/src/settings_emoji.js
@@ -221,8 +221,6 @@ function show_modal() {
                 error(xhr) {
                     $("#dialog_error").hide();
                     dialog_widget.hide_dialog_spinner();
-                    const errors = JSON.parse(xhr.responseText).msg;
-                    xhr.responseText = JSON.stringify({msg: errors});
                     ui_report.error($t_html({defaultMessage: "Failed"}), xhr, $emoji_status);
                 },
             });
diff --git a/web/src/settings_user_groups_legacy.js b/web/src/settings_user_groups_legacy.js
index 2578d11894..065a2befc5 100644
--- a/web/src/settings_user_groups_legacy.js
+++ b/web/src/settings_user_groups_legacy.js
@@ -216,8 +216,6 @@ export function populate_user_groups() {
                     setTimeout(show_saved_button, 200);
                 },
                 error(xhr) {
-                    const errors = JSON.parse(xhr.responseText).msg;
-                    xhr.responseText = JSON.stringify({msg: errors});
                     ui_report.error($t_html({defaultMessage: "Failed"}), xhr, $user_group_status);
                     update_cancel_button();
                     $(`#user-groups #${CSS.escape(data.id)} .name`).text(group_data.name);
@@ -324,8 +322,6 @@ export function add_user_group() {
         },
         error(xhr) {
             $user_group_status.hide();
-            const errors = JSON.parse(xhr.responseText).msg;
-            xhr.responseText = JSON.stringify({msg: errors});
             ui_report.error($t_html({defaultMessage: "Failed"}), xhr, $user_group_status);
         },
     });
diff --git a/web/tests/settings_user_groups_legacy.test.js b/web/tests/settings_user_groups_legacy.test.js
index 67f033ba15..1fed7a0bb2 100644
--- a/web/tests/settings_user_groups_legacy.test.js
+++ b/web/tests/settings_user_groups_legacy.test.js
@@ -538,21 +538,14 @@ test_ui("on_events", ({override_rewire, mock_template}) => {
 
                 assert.ok(!$("#dialog_error").visible());
             })();
-
             (function test_post_error() {
                 $("#dialog_error").show();
                 ui_report.error = (error_msg, error_obj, ele) => {
-                    const xhr = {
-                        responseText: '{"msg":"fake-msg"}',
-                    };
                     assert.equal(error_msg, "translated HTML: Failed");
-                    assert.deepEqual(error_obj, xhr);
+                    assert.deepEqual(error_obj, {responseJson: {msg: "fake-msg"}});
                     assert.equal(ele, $("#dialog_error"));
                 };
-                const xhr = {
-                    responseText: '{"msg":"fake-msg", "attrib":"val"}',
-                };
-                opts.error(xhr);
+                opts.error({responseJson: {msg: "fake-msg"}});
 
                 assert.ok(!$("#dialog_error").visible());
             })();
@@ -763,17 +756,11 @@ test_ui("on_events", ({override_rewire, mock_template}) => {
                 const $user_group_error = $(user_group_selector + " .user-group-status");
                 $user_group_error.show();
                 ui_report.error = (error_msg, error_obj, ele) => {
-                    const xhr = {
-                        responseText: '{"msg":"fake-msg"}',
-                    };
                     assert.equal(error_msg, "translated HTML: Failed");
-                    assert.deepEqual(error_obj, xhr);
+                    assert.deepEqual(error_obj, {responseJson: {msg: "fake-msg"}});
                     assert.equal(ele, $user_group_error);
                 };
-                const xhr = {
-                    responseText: '{"msg":"fake-msg", "attrib":"val"}',
-                };
-                opts.error(xhr);
+                opts.error({responseJson: {msg: "fake-msg"}});
 
                 assert.ok($user_group_error.visible());
             })();