diff --git a/ui/package-lock.json b/ui/package-lock.json
index e09004ed4..33326b5d6 100644
--- a/ui/package-lock.json
+++ b/ui/package-lock.json
@@ -6355,6 +6355,12 @@
         "p-map": "1.2.0"
       }
     },
+    "jest-localstorage-mock": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/jest-localstorage-mock/-/jest-localstorage-mock-2.2.0.tgz",
+      "integrity": "sha512-x+P0vcwr4540bCAYzTEpiD9rs+zh/QZzyiABV+MU6yM2OPwPlrrLyUx/6gValMyt6tg5lX6Z53o2rHWfUht5Xw==",
+      "dev": true
+    },
     "jest-matcher-utils": {
       "version": "20.0.3",
       "resolved": "https://registry.npmjs.org/jest-matcher-utils/-/jest-matcher-utils-20.0.3.tgz",
diff --git a/ui/package.json b/ui/package.json
index 372070f65..01417fb43 100644
--- a/ui/package.json
+++ b/ui/package.json
@@ -52,6 +52,7 @@
   },
   "devDependencies": {
     "eslint-plugin-react": "7.11.1",
+    "jest-localstorage-mock": "2.2.0",
     "markdownlint-cli": "0.13.0",
     "node-sass-chokidar": "1.3.3",
     "onchange": "4.1.0",
diff --git a/ui/src/Components/Fetcher/index.js b/ui/src/Components/Fetcher/index.js
index f1f85e896..e20f0332a 100644
--- a/ui/src/Components/Fetcher/index.js
+++ b/ui/src/Components/Fetcher/index.js
@@ -28,7 +28,7 @@ const Fetcher = observer(
 
         this.interval = newInterval;
         this.timer = setInterval(
-          () => alertStore.fetch(),
+          () => alertStore.fetchWithThrottle(),
           this.interval * 1000
         );
       }
@@ -37,7 +37,7 @@ const Fetcher = observer(
     componentDidUpdate() {
       const { alertStore } = this.props;
 
-      alertStore.fetch();
+      alertStore.fetchWithThrottle();
 
       this.setTimer();
     }
@@ -45,7 +45,7 @@ const Fetcher = observer(
     componentDidMount() {
       const { alertStore } = this.props;
 
-      alertStore.fetch();
+      alertStore.fetchWithThrottle();
 
       this.setTimer();
     }
diff --git a/ui/src/Components/Fetcher/index.test.js b/ui/src/Components/Fetcher/index.test.js
new file mode 100644
index 000000000..02c2c7cfa
--- /dev/null
+++ b/ui/src/Components/Fetcher/index.test.js
@@ -0,0 +1,124 @@
+import React from "react";
+import renderer from "react-test-renderer";
+
+import { FetchMock, EmptyAPIResponse } from "__mocks__/Fetch";
+
+import { AlertStore } from "Stores/AlertStore";
+import { Settings } from "Stores/Settings";
+
+import { Fetcher } from ".";
+
+beforeAll(() => {
+  jest.useFakeTimers();
+});
+
+let alertStore;
+let settingsStore;
+
+beforeEach(() => {
+  const response = EmptyAPIResponse();
+  global.fetch = FetchMock(response);
+
+  alertStore = new AlertStore(["label=value"]);
+  settingsStore = new Settings();
+});
+
+afterEach(() => {
+  jest.clearAllTimers();
+
+  global.fetch.mockRestore();
+});
+
+describe("<Fetcher />", () => {
+  it("renders correctly with 'label=value' filter", () => {
+    const tree = renderer
+      .create(<Fetcher alertStore={alertStore} settingsStore={settingsStore} />)
+      .toJSON();
+
+    expect(tree.props["data-filters"]).toBe("label=value");
+    expect(tree.props["data-interval"]).toBe(30);
+  });
+
+  it("re-renders on fetch interval change", () => {
+    const fetcher = renderer.create(
+      <Fetcher alertStore={alertStore} settingsStore={settingsStore} />
+    );
+
+    expect(fetcher.toJSON().props["data-interval"]).toBe(30);
+    settingsStore.fetchConfig.config.interval = 60;
+    expect(fetcher.toJSON().props["data-interval"]).toBe(60);
+  });
+
+  it("re-renders on filters change", () => {
+    const fetcher = renderer.create(
+      <Fetcher alertStore={alertStore} settingsStore={settingsStore} />
+    );
+
+    expect(fetcher.toJSON().props["data-filters"]).toBe("label=value");
+    alertStore.filters.values = [];
+    expect(fetcher.toJSON().props["data-filters"]).toBe("");
+  });
+
+  it("calls alertStore.fetchWithThrottle on mount", () => {
+    const fetchSpy = jest.spyOn(alertStore, "fetchWithThrottle");
+
+    renderer.create(
+      <Fetcher alertStore={alertStore} settingsStore={settingsStore} />
+    );
+
+    expect(fetchSpy).toHaveBeenCalledTimes(1);
+  });
+
+  it("calls alertStore.fetchWithThrottle again after interval change", () => {
+    const fetchSpy = jest.spyOn(alertStore, "fetchWithThrottle");
+
+    renderer.create(
+      <Fetcher alertStore={alertStore} settingsStore={settingsStore} />
+    );
+    settingsStore.fetchConfig.config.interval = 60;
+
+    expect(fetchSpy).toHaveBeenCalledTimes(2);
+  });
+
+  it("calls alertStore.fetchWithThrottle again after filter change", () => {
+    const fetchSpy = jest.spyOn(alertStore, "fetchWithThrottle");
+
+    renderer.create(
+      <Fetcher alertStore={alertStore} settingsStore={settingsStore} />
+    );
+    alertStore.filters.values = [];
+
+    expect(fetchSpy).toHaveBeenCalledTimes(2);
+  });
+
+  it("keeps calling alertStore.fetchWithThrottle after running pending timers", () => {
+    const fetchSpy = jest.spyOn(alertStore, "fetchWithThrottle");
+
+    renderer.create(
+      <Fetcher alertStore={alertStore} settingsStore={settingsStore} />
+    );
+    jest.runOnlyPendingTimers();
+    expect(fetchSpy).toHaveBeenCalledTimes(2);
+    jest.runOnlyPendingTimers();
+    expect(fetchSpy).toHaveBeenCalledTimes(3);
+    jest.runOnlyPendingTimers();
+    expect(fetchSpy).toHaveBeenCalledTimes(4);
+  });
+
+  it("internal timer is armed after render", () => {
+    const fetcher = renderer.create(
+      <Fetcher alertStore={alertStore} settingsStore={settingsStore} />
+    );
+    const instance = fetcher.getInstance();
+    expect(instance.timer).toBeGreaterThanOrEqual(0);
+  });
+
+  it("internal timer is null after unmount", () => {
+    const fetcher = renderer.create(
+      <Fetcher alertStore={alertStore} settingsStore={settingsStore} />
+    );
+    const instance = fetcher.getInstance();
+    instance.componentWillUnmount();
+    expect(instance.timer).toBeNull();
+  });
+});
diff --git a/ui/src/Components/Labels/FilteringCounterBadge/index.test.js b/ui/src/Components/Labels/FilteringCounterBadge/index.test.js
new file mode 100644
index 000000000..45f15921d
--- /dev/null
+++ b/ui/src/Components/Labels/FilteringCounterBadge/index.test.js
@@ -0,0 +1,112 @@
+import React from "react";
+import renderer from "react-test-renderer";
+
+import { AlertStore } from "Stores/AlertStore";
+
+import { FilteringCounterBadge } from ".";
+
+let alertStore;
+
+beforeEach(() => {
+  alertStore = new AlertStore([]);
+});
+
+const validateClassName = (value, className) => {
+  const tree = renderer
+    .create(
+      <FilteringCounterBadge
+        alertStore={alertStore}
+        name="@state"
+        value={value}
+        counter={1}
+      />
+    )
+    .toJSON();
+  expect(tree.props.className.split(" ")).toContain(className);
+};
+
+const validateStyle = value => {
+  const tree = renderer
+    .create(
+      <FilteringCounterBadge
+        alertStore={alertStore}
+        name="@state"
+        value={value}
+        counter={1}
+      />
+    )
+    .toJSON();
+  expect(tree.props.style).toMatchObject({});
+};
+
+const validateOnClick = value => {
+  const tree = renderer
+    .create(
+      <FilteringCounterBadge
+        alertStore={alertStore}
+        name="@state"
+        value={value}
+        counter={1}
+      />
+    )
+    .toJSON();
+
+  tree.props.onClick({ preventDefault: () => {} });
+
+  expect(alertStore.filters.values).toHaveLength(1);
+  expect(alertStore.filters.values).toContainEqual({
+    applied: false,
+    isValid: true,
+    raw: `@state=${value}`,
+    hits: 0,
+    name: "",
+    matcher: "",
+    value: ""
+  });
+};
+
+describe("<FilteringCounterBadge />", () => {
+  it("@state=unprocessed counter badge should have className 'badge-secondary'", () => {
+    validateClassName("unprocessed", "badge-secondary");
+  });
+  it("@state=active counter badge should have className 'badge-secondary'", () => {
+    validateClassName("active", "badge-danger");
+  });
+  it("@state=suppressed counter badge should have className 'badge-secondary'", () => {
+    validateClassName("suppressed", "badge-success");
+  });
+
+  it("@state=unprocessed counter badge should have empty style", () => {
+    validateStyle("unprocessed");
+  });
+  it("@state=active counter badge should have empty style", () => {
+    validateStyle("active");
+  });
+  it("@state=suppressed counter badge should have empty style", () => {
+    validateStyle("suppressed");
+  });
+
+  it("counter badge should have correct children based on the counter prop value", () => {
+    const tree = renderer
+      .create(
+        <FilteringCounterBadge
+          alertStore={alertStore}
+          name="@state"
+          value="active"
+          counter={123}
+        />
+      )
+      .toJSON();
+    expect(tree.children).toEqual(["123"]);
+  });
+
+  it("onClick method on @state=unprocessed counter badge should add a new filter", () => {
+    validateOnClick("unprocessed");
+  });
+  it("onClick method on @state=active counter badge should add a new filter", () => {
+    validateOnClick("active");
+  });
+  it("onClick method on @state=suppressed counter badge should add a new filter", () => {
+    validateOnClick("suppressed");
+  });
+});
diff --git a/ui/src/Stores/AlertStore.js b/ui/src/Stores/AlertStore.js
index fea8bcc69..419ebd4e1 100644
--- a/ui/src/Stores/AlertStore.js
+++ b/ui/src/Stores/AlertStore.js
@@ -212,7 +212,7 @@ class AlertStore {
       });
   });
 
-  fetchWithThrottle = throttle(this.fetch, 500);
+  fetchWithThrottle = throttle(this.fetch, 300);
 
   parseAPIResponse = action(result => {
     if (result.error) {
@@ -220,18 +220,20 @@ class AlertStore {
       return;
     }
 
-    const queryFilters = new Set(
-      this.filters.values
-        .map(f => f.raw)
-        .slice()
-        .sort()
-    );
-    const responseFilters = new Set(result.filters.map(m => m.text).sort());
-    if (
-      JSON.stringify([...queryFilters]) !== JSON.stringify([...responseFilters])
-    ) {
+    const queryFilters = [
+      ...new Set(
+        this.filters.values
+          .map(f => f.raw)
+          .slice()
+          .sort()
+      )
+    ];
+    const responseFilters = [
+      ...new Set(result.filters.map(m => m.text).sort())
+    ];
+    if (JSON.stringify(queryFilters) !== JSON.stringify(responseFilters)) {
       console.info(
-        `Got response with filters=${responseFilters} while expecting results for ${queryFilters}, ignoring`
+        `Got response with filters '${responseFilters}' while expecting results for '${queryFilters}', ignoring`
       );
       return;
     }
diff --git a/ui/src/setupTests.js b/ui/src/setupTests.js
new file mode 100644
index 000000000..5b9840092
--- /dev/null
+++ b/ui/src/setupTests.js
@@ -0,0 +1 @@
+require("jest-localstorage-mock");