diff --git a/src/cdk-experimental/ui-patterns/listbox/BUILD.bazel b/src/cdk-experimental/ui-patterns/listbox/BUILD.bazel
index 7d5ff173e7ed..bd856fecdf4a 100644
--- a/src/cdk-experimental/ui-patterns/listbox/BUILD.bazel
+++ b/src/cdk-experimental/ui-patterns/listbox/BUILD.bazel
@@ -1,3 +1,4 @@
+load("//tools:defaults.bzl", "ng_web_test_suite")
 load("//tools:defaults2.bzl", "ts_project")
 
 package(default_visibility = ["//visibility:public"])
@@ -18,3 +19,20 @@ ts_project(
         "//src/cdk-experimental/ui-patterns/behaviors/signal-like",
     ],
 )
+
+ts_project(
+    name = "unit_test_sources",
+    testonly = True,
+    srcs = glob(["**/*.spec.ts"]),
+    deps = [
+        ":listbox",
+        "//:node_modules/@angular/core",
+        "//src/cdk/keycodes",
+        "//src/cdk/testing/private",
+    ],
+)
+
+ng_web_test_suite(
+    name = "unit_tests",
+    deps = [":unit_test_sources"],
+)
diff --git a/src/cdk-experimental/ui-patterns/listbox/listbox.spec.ts b/src/cdk-experimental/ui-patterns/listbox/listbox.spec.ts
new file mode 100644
index 000000000000..0c4fd44af81f
--- /dev/null
+++ b/src/cdk-experimental/ui-patterns/listbox/listbox.spec.ts
@@ -0,0 +1,154 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.dev/license
+ */
+
+import {signal} from '@angular/core';
+import {ListboxInputs, ListboxPattern} from './listbox';
+import {OptionPattern} from './option';
+import {createKeyboardEvent} from '@angular/cdk/testing/private';
+
+type TestInputs = ListboxInputs<string>;
+type TestOption = OptionPattern<string>;
+type TestListbox = ListboxPattern<string>;
+
+describe('Listbox Pattern', () => {
+  function getListbox(inputs: Partial<TestInputs> & Pick<TestInputs, 'items'>) {
+    return new ListboxPattern({
+      items: inputs.items,
+      value: inputs.value ?? signal([]),
+      activeIndex: inputs.activeIndex ?? signal(0),
+      typeaheadDelay: inputs.typeaheadDelay ?? signal(0.5),
+      wrap: inputs.wrap ?? signal(true),
+      disabled: inputs.disabled ?? signal(false),
+      skipDisabled: inputs.skipDisabled ?? signal(true),
+      multiselectable: inputs.multiselectable ?? signal(false),
+      focusMode: inputs.focusMode ?? signal('roving'),
+      textDirection: inputs.textDirection ?? signal('ltr'),
+      orientation: inputs.orientation ?? signal('vertical'),
+      selectionMode: inputs.selectionMode ?? signal('explicit'),
+    });
+  }
+
+  function getOptions(listbox: TestListbox, values: string[]): TestOption[] {
+    return values.map((value, index) => {
+      return new OptionPattern({
+        value: signal(value),
+        id: signal(`option-${index}`),
+        disabled: signal(false),
+        searchTerm: signal(value),
+        listbox: signal(listbox),
+        element: signal({focus: () => {}} as HTMLElement),
+      });
+    });
+  }
+
+  function getPatterns(values: string[], inputs: Partial<TestInputs> = {}) {
+    const options = signal<TestOption[]>([]);
+    const listbox = getListbox({...inputs, items: options});
+    options.set(getOptions(listbox, values));
+    return {listbox, options};
+  }
+
+  function getDefaultPatterns(inputs: Partial<TestInputs> = {}) {
+    return getPatterns(
+      [
+        'Apple',
+        'Apricot',
+        'Banana',
+        'Blackberry',
+        'Blueberry',
+        'Cantaloupe',
+        'Cherry',
+        'Clementine',
+        'Cranberry',
+      ],
+      inputs,
+    );
+  }
+
+  describe('Navigation', () => {
+    it('should navigate next on ArrowDown', () => {
+      const {listbox} = getDefaultPatterns();
+      const event = createKeyboardEvent('keydown', 40, 'ArrowDown');
+      expect(listbox.inputs.activeIndex()).toBe(0);
+      listbox.onKeydown(event);
+      expect(listbox.inputs.activeIndex()).toBe(1);
+    });
+
+    it('should navigate prev on ArrowUp', () => {
+      const event = createKeyboardEvent('keydown', 38, 'ArrowUp');
+      const {listbox} = getDefaultPatterns({
+        activeIndex: signal(1),
+      });
+      expect(listbox.inputs.activeIndex()).toBe(1);
+      listbox.onKeydown(event);
+      expect(listbox.inputs.activeIndex()).toBe(0);
+    });
+
+    it('should navigate next on ArrowRight (horizontal)', () => {
+      const event = createKeyboardEvent('keydown', 39, 'ArrowRight');
+      const {listbox} = getDefaultPatterns({
+        orientation: signal('horizontal'),
+      });
+      expect(listbox.inputs.activeIndex()).toBe(0);
+      listbox.onKeydown(event);
+      expect(listbox.inputs.activeIndex()).toBe(1);
+    });
+
+    it('should navigate prev on ArrowLeft (horizontal)', () => {
+      const event = createKeyboardEvent('keydown', 37, 'ArrowLeft');
+      const {listbox} = getDefaultPatterns({
+        activeIndex: signal(1),
+        orientation: signal('horizontal'),
+      });
+      expect(listbox.inputs.activeIndex()).toBe(1);
+      listbox.onKeydown(event);
+      expect(listbox.inputs.activeIndex()).toBe(0);
+    });
+
+    it('should navigate next on ArrowLeft (horizontal & rtl)', () => {
+      const event = createKeyboardEvent('keydown', 38, 'ArrowLeft');
+      const {listbox} = getDefaultPatterns({
+        textDirection: signal('rtl'),
+        orientation: signal('horizontal'),
+      });
+      expect(listbox.inputs.activeIndex()).toBe(0);
+      listbox.onKeydown(event);
+      expect(listbox.inputs.activeIndex()).toBe(1);
+    });
+
+    it('should navigate prev on ArrowRight (horizontal & rtl)', () => {
+      const event = createKeyboardEvent('keydown', 39, 'ArrowRight');
+      const {listbox} = getDefaultPatterns({
+        activeIndex: signal(1),
+        textDirection: signal('rtl'),
+        orientation: signal('horizontal'),
+      });
+      expect(listbox.inputs.activeIndex()).toBe(1);
+      listbox.onKeydown(event);
+      expect(listbox.inputs.activeIndex()).toBe(0);
+    });
+
+    it('should navigate to the first option on Home', () => {
+      const event = createKeyboardEvent('keydown', 36, 'Home');
+      const {listbox} = getDefaultPatterns({
+        activeIndex: signal(8),
+      });
+      expect(listbox.inputs.activeIndex()).toBe(8);
+      listbox.onKeydown(event);
+      expect(listbox.inputs.activeIndex()).toBe(0);
+    });
+
+    it('should navigate to the last option on End', () => {
+      const event = createKeyboardEvent('keydown', 35, 'End');
+      const {listbox} = getDefaultPatterns();
+      expect(listbox.inputs.activeIndex()).toBe(0);
+      listbox.onKeydown(event);
+      expect(listbox.inputs.activeIndex()).toBe(8);
+    });
+  });
+});