diff --git a/ui/src/Stores/SilenceFormStore.test.js b/ui/src/Stores/SilenceFormStore.test.js
new file mode 100644
index 000000000..581ad2fa4
--- /dev/null
+++ b/ui/src/Stores/SilenceFormStore.test.js
@@ -0,0 +1,123 @@
+import moment from "moment";
+
+import { MockAlert, MockAlertGroup } from "__mocks__/Alerts.js";
+import { SilenceFormStore } from "./SilenceFormStore";
+
+let store;
+beforeEach(() => {
+  store = new SilenceFormStore();
+});
+
+describe("SilenceFormStore.toggle", () => {
+  it("toggle() toggles 'visible' correctly", () => {
+    expect(store.toggle.visible).toBe(false);
+    store.toggle.toggle();
+    expect(store.toggle.visible).toBe(true);
+    store.toggle.toggle();
+    expect(store.toggle.visible).toBe(false);
+  });
+
+  it("show() set 'visible' to true", () => {
+    expect(store.toggle.visible).toBe(false);
+    store.toggle.show();
+    expect(store.toggle.visible).toBe(true);
+  });
+
+  it("hide() set 'visible' to false", () => {
+    expect(store.toggle.visible).toBe(false);
+    store.toggle.visible = true;
+    expect(store.toggle.visible).toBe(true);
+    store.toggle.hide();
+    expect(store.toggle.visible).toBe(false);
+  });
+});
+
+const MockGroup = () => {
+  const alerts = [
+    MockAlert([], { instance: "prod1", cluster: "prod" }),
+    MockAlert([], { instance: "prod2", cluster: "prod" }),
+    MockAlert([], { instance: "dev1", cluster: "dev" })
+  ];
+  const group = MockAlertGroup({ alertname: "FakeAlert" }, alerts, [], {
+    job: "mock"
+  });
+  return group;
+};
+
+describe("SilenceFormStore.data", () => {
+  it("resetProgress() sets 'inProgress' to false", () => {
+    store.data.inProgress = true;
+    expect(store.data.inProgress).toBe(true);
+    store.data.resetProgress();
+    expect(store.data.inProgress).toBe(false);
+  });
+
+  it("addEmptyMatcher() appends a matcher", () => {
+    expect(store.data.matchers).toHaveLength(0);
+    store.data.addEmptyMatcher();
+    expect(store.data.matchers).toHaveLength(1);
+  });
+
+  it("deleteMatcher() removes a matcher with passed id", () => {
+    store.data.addEmptyMatcher();
+    store.data.addEmptyMatcher();
+    store.data.addEmptyMatcher();
+    const matcherID = store.data.matchers[1].id;
+    store.data.deleteMatcher(matcherID);
+    expect(store.data.matchers).toHaveLength(2);
+    expect(store.data.matchers).not.toContainEqual(
+      expect.objectContaining({ id: matcherID })
+    );
+  });
+
+  it("fillMatchersFromGroup() creates correct matcher object for a group", () => {
+    const group = MockGroup();
+    store.data.fillMatchersFromGroup(group);
+    expect(store.data.matchers).toHaveLength(4);
+    expect(store.data.matchers).toContainEqual(
+      expect.objectContaining({
+        name: "alertname",
+        values: [{ label: "FakeAlert", value: "FakeAlert" }],
+        isRegex: false
+      })
+    );
+    expect(store.data.matchers).toContainEqual(
+      expect.objectContaining({
+        name: "job",
+        values: [{ label: "mock", value: "mock" }],
+        isRegex: false
+      })
+    );
+    expect(store.data.matchers).toContainEqual(
+      expect.objectContaining({
+        name: "instance",
+        values: [
+          { label: "dev1", value: "dev1" },
+          { label: "prod1", value: "prod1" },
+          { label: "prod2", value: "prod2" }
+        ],
+        isRegex: true
+      })
+    );
+    expect(store.data.matchers).toContainEqual(
+      expect.objectContaining({
+        name: "cluster",
+        values: [
+          { label: "dev", value: "dev" },
+          { label: "prod", value: "prod" }
+        ],
+        isRegex: true
+      })
+    );
+  });
+
+  it("toAlertmanagerPayload creates payload that matches snapshot", () => {
+    const group = MockGroup();
+    store.data.fillMatchersFromGroup(group);
+    store.data.startsAt = moment([2000, 1, 1, 0, 0, 0]);
+    store.data.endsAt = moment([2000, 1, 1, 1, 0, 0]);
+    store.data.createdBy = "me@example.com";
+    store.data.comment = "toAlertmanagerPayload test";
+    expect(store.data.toAlertmanagerPayload).toMatchSnapshot();
+  });
+});
diff --git a/ui/src/Stores/__snapshots__/SilenceFormStore.test.js.snap b/ui/src/Stores/__snapshots__/SilenceFormStore.test.js.snap
new file mode 100644
index 000000000..39e22419b
--- /dev/null
+++ b/ui/src/Stores/__snapshots__/SilenceFormStore.test.js.snap
@@ -0,0 +1,32 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`SilenceFormStore.data toAlertmanagerPayload creates payload that matches snapshot 1`] = `
+Object {
+  "comment": "toAlertmanagerPayload test",
+  "createdBy": "",
+  "endsAt": "2000-02-01T01:00:00.000Z",
+  "matchers": Array [
+    Object {
+      "isRegex": false,
+      "name": "alertname",
+      "value": "FakeAlert",
+    },
+    Object {
+      "isRegex": false,
+      "name": "job",
+      "value": "mock",
+    },
+    Object {
+      "isRegex": true,
+      "name": "instance",
+      "value": "(dev1|prod1|prod2)",
+    },
+    Object {
+      "isRegex": true,
+      "name": "cluster",
+      "value": "(dev|prod)",
+    },
+  ],
+  "startsAt": "2000-02-01T00:00:00.000Z",
+}
+`;
diff --git a/ui/src/__mocks__/Alerts.js b/ui/src/__mocks__/Alerts.js
new file mode 100644
index 000000000..2dae2c5a9
--- /dev/null
+++ b/ui/src/__mocks__/Alerts.js
@@ -0,0 +1,53 @@
+const MockAnnotation = (name, value, visible, isLink) => ({
+  name: name,
+  value: value,
+  visible: visible,
+  isLink: isLink
+});
+
+const MockAlert = (annotations, labels, state) => ({
+  annotations: annotations,
+  labels: labels,
+  startsAt: "2018-08-14T17:36:40.017867056Z",
+  endsAt: "0001-01-01T00:00:00Z",
+  state: state,
+  alertmanager: [
+    {
+      name: "default",
+      uri: "file:///mock",
+      state: "active",
+      startsAt: "2018-08-14T17:36:40.017867056Z",
+      endsAt: "0001-01-01T00:00:00Z",
+      source: "localhost/prometheus",
+      silencedBy: []
+    }
+  ],
+  receiver: "by-name"
+});
+
+const MockAlertGroup = (
+  rootLabels,
+  alerts,
+  sharedAnnotations,
+  sharedLabels
+) => ({
+  receiver: "by-name",
+  labels: rootLabels,
+  alerts: alerts,
+  id: "099c5ca6d1c92f615b13056b935d0c8dee70f18c",
+  hash: "53a4bb3d7e916450b3bda550976f9578db5b2ad3",
+  alertmanagerCount: {
+    default: 1
+  },
+  stateCount: {
+    active: 1,
+    suppressed: 0,
+    unprocessed: 0
+  },
+  shared: {
+    annotations: sharedAnnotations,
+    labels: sharedLabels
+  }
+});
+
+export { MockAnnotation, MockAlert, MockAlertGroup };