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diff --git a/spec/frontend/operation_settings/components/metrics_settings_spec.js b/spec/frontend/operation_settings/components/metrics_settings_spec.js
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+++ b/spec/frontend/operation_settings/components/metrics_settings_spec.js
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+import { mount, shallowMount } from '@vue/test-utils';
+import { GlDeprecatedButton, GlLink, GlFormGroup, GlFormInput, GlFormSelect } from '@gitlab/ui';
+import { TEST_HOST } from 'helpers/test_constants';
+import MetricsSettings from '~/operation_settings/components/metrics_settings.vue';
+
+import ExternalDashboard from '~/operation_settings/components/form_group/external_dashboard.vue';
+import DashboardTimezone from '~/operation_settings/components/form_group/dashboard_timezone.vue';
+import { timezones } from '~/monitoring/format_date';
+import store from '~/operation_settings/store';
+import axios from '~/lib/utils/axios_utils';
+import { refreshCurrentPage } from '~/lib/utils/url_utility';
+import createFlash from '~/flash';
+
+jest.mock('~/lib/utils/url_utility');
+jest.mock('~/flash');
+
+describe('operation settings external dashboard component', () => {
+  let wrapper;
+
+  const operationsSettingsEndpoint = `${TEST_HOST}/mock/ops/settings/endpoint`;
+  const helpPage = `${TEST_HOST}/help/metrics/page/path`;
+  const externalDashboardUrl = `http://mock-external-domain.com/external/dashboard/url`;
+  const dashboardTimezoneSetting = timezones.LOCAL;
+
+  const mountComponent = (shallow = true) => {
+    const config = [
+      MetricsSettings,
+      {
+        store: store({
+          operationsSettingsEndpoint,
+          helpPage,
+          externalDashboardUrl,
+          dashboardTimezoneSetting,
+        }),
+        stubs: {
+          ExternalDashboard,
+          DashboardTimezone,
+        },
+      },
+    ];
+    wrapper = shallow ? shallowMount(...config) : mount(...config);
+  };
+
+  beforeEach(() => {
+    jest.spyOn(axios, 'patch').mockImplementation();
+  });
+
+  afterEach(() => {
+    if (wrapper.destroy) {
+      wrapper.destroy();
+    }
+    axios.patch.mockReset();
+    refreshCurrentPage.mockReset();
+    createFlash.mockReset();
+  });
+
+  it('renders header text', () => {
+    mountComponent();
+    expect(wrapper.find('.js-section-header').text()).toBe('Metrics Dashboard');
+  });
+
+  describe('expand/collapse button', () => {
+    it('renders as an expand button by default', () => {
+      const button = wrapper.find(GlDeprecatedButton);
+
+      expect(button.text()).toBe('Expand');
+    });
+  });
+
+  describe('sub-header', () => {
+    let subHeader;
+
+    beforeEach(() => {
+      mountComponent();
+      subHeader = wrapper.find('.js-section-sub-header');
+    });
+
+    it('renders descriptive text', () => {
+      expect(subHeader.text()).toContain('Manage Metrics Dashboard settings.');
+    });
+
+    it('renders help page link', () => {
+      const link = subHeader.find(GlLink);
+
+      expect(link.text()).toBe('Learn more');
+      expect(link.attributes().href).toBe(helpPage);
+    });
+  });
+
+  describe('form', () => {
+    describe('dashboard timezone', () => {
+      describe('field label', () => {
+        let formGroup;
+
+        beforeEach(() => {
+          mountComponent(false);
+          formGroup = wrapper.find(DashboardTimezone).find(GlFormGroup);
+        });
+
+        it('uses label text', () => {
+          expect(formGroup.find('label').text()).toBe('Dashboard timezone');
+        });
+
+        it('uses description text', () => {
+          const description = formGroup.find('small');
+          expect(description.text()).not.toBeFalsy();
+        });
+      });
+
+      describe('select field', () => {
+        let select;
+
+        beforeEach(() => {
+          mountComponent();
+          select = wrapper.find(DashboardTimezone).find(GlFormSelect);
+        });
+
+        it('defaults to externalDashboardUrl', () => {
+          expect(select.attributes('value')).toBe(dashboardTimezoneSetting);
+        });
+      });
+    });
+
+    describe('external dashboard', () => {
+      describe('input label', () => {
+        let formGroup;
+
+        beforeEach(() => {
+          mountComponent(false);
+          formGroup = wrapper.find(ExternalDashboard).find(GlFormGroup);
+        });
+
+        it('uses label text', () => {
+          expect(formGroup.find('label').text()).toBe('External dashboard URL');
+        });
+
+        it('uses description text', () => {
+          const description = formGroup.find('small');
+          expect(description.text()).not.toBeFalsy();
+        });
+      });
+
+      describe('input field', () => {
+        let input;
+
+        beforeEach(() => {
+          mountComponent();
+          input = wrapper.find(ExternalDashboard).find(GlFormInput);
+        });
+
+        it('defaults to externalDashboardUrl', () => {
+          expect(input.attributes().value).toBeTruthy();
+          expect(input.attributes().value).toBe(externalDashboardUrl);
+        });
+
+        it('uses a placeholder', () => {
+          expect(input.attributes().placeholder).toBe('https://my-org.gitlab.io/my-dashboards');
+        });
+      });
+    });
+
+    describe('submit button', () => {
+      const findSubmitButton = () =>
+        wrapper.find('.settings-content form').find(GlDeprecatedButton);
+
+      const endpointRequest = [
+        operationsSettingsEndpoint,
+        {
+          project: {
+            metrics_setting_attributes: {
+              dashboard_timezone: dashboardTimezoneSetting,
+              external_dashboard_url: externalDashboardUrl,
+            },
+          },
+        },
+      ];
+
+      it('renders button label', () => {
+        mountComponent();
+        const submit = findSubmitButton();
+        expect(submit.text()).toBe('Save Changes');
+      });
+
+      it('submits form on click', () => {
+        mountComponent(false);
+        axios.patch.mockResolvedValue();
+        findSubmitButton().trigger('click');
+
+        expect(axios.patch).toHaveBeenCalledWith(...endpointRequest);
+
+        return wrapper.vm.$nextTick().then(() => expect(refreshCurrentPage).toHaveBeenCalled());
+      });
+
+      it('creates flash banner on error', () => {
+        mountComponent(false);
+        const message = 'mockErrorMessage';
+        axios.patch.mockRejectedValue({ response: { data: { message } } });
+        findSubmitButton().trigger('click');
+
+        expect(axios.patch).toHaveBeenCalledWith(...endpointRequest);
+
+        return wrapper.vm
+          .$nextTick()
+          .then(jest.runAllTicks)
+          .then(() =>
+            expect(createFlash).toHaveBeenCalledWith(
+              `There was an error saving your changes. ${message}`,
+              'alert',
+            ),
+          );
+      });
+    });
+  });
+});