diff --git a/shell/store/__tests__/uiplugins.test.ts b/shell/store/__tests__/uiplugins.test.ts
new file mode 100644
index 00000000000..6494680b4eb
--- /dev/null
+++ b/shell/store/__tests__/uiplugins.test.ts
@@ -0,0 +1,171 @@
+import { state, getters, mutations } from '../uiplugins';
+
+/** Minimal stub with only the properties used by the store */
+interface PluginStub {
+  name: string;
+}
+
+function makeState() {
+  return state();
+}
+
+describe('uiplugins store', () => {
+  describe('state', () => {
+    it('returns empty plugins array', () => {
+      expect(makeState().plugins).toStrictEqual([]);
+    });
+
+    it('returns empty errors object', () => {
+      expect(makeState().errors).toStrictEqual({});
+    });
+
+    it('returns ready as false', () => {
+      expect(makeState().ready).toStrictEqual(false);
+    });
+
+    it('returns a fresh copy on each call', () => {
+      const s1 = makeState();
+      const s2 = makeState();
+
+      s1.plugins.push({ name: 'a' } as any);
+      expect(s2.plugins).toStrictEqual([]);
+    });
+  });
+
+  describe('getters', () => {
+    it('plugins returns state.plugins', () => {
+      const s = makeState();
+      const plugin = { name: 'foo' } as any;
+
+      s.plugins.push(plugin);
+      expect(getters.plugins(s)).toStrictEqual([plugin]);
+    });
+
+    it('errors returns state.errors', () => {
+      const s = makeState();
+
+      s.errors['bar'] = true;
+      expect(getters.errors(s)).toStrictEqual({ bar: true });
+    });
+
+    it('ready returns state.ready', () => {
+      const s = makeState();
+
+      s.ready = true;
+      expect(getters.ready(s)).toStrictEqual(true);
+    });
+  });
+
+  describe('mutations.setError', () => {
+    it('adds a new error entry by name', () => {
+      const s = makeState();
+
+      mutations.setError(s, { name: 'my-plugin', error: true });
+      expect(s.errors['my-plugin']).toStrictEqual(true);
+    });
+
+    it('stores a falsy error value (no error cleared)', () => {
+      const s = makeState();
+
+      mutations.setError(s, { name: 'my-plugin', error: false });
+      expect(s.errors['my-plugin']).toStrictEqual(false);
+    });
+
+    it('overwrites an existing error entry', () => {
+      const s = makeState();
+
+      mutations.setError(s, { name: 'plug', error: true });
+      mutations.setError(s, { name: 'plug', error: false });
+      expect(s.errors['plug']).toStrictEqual(false);
+    });
+
+    it('stores errors for distinct names independently', () => {
+      const s = makeState();
+
+      mutations.setError(s, { name: 'a', error: true });
+      mutations.setError(s, { name: 'b', error: false });
+      expect(s.errors).toStrictEqual({ a: true, b: false });
+    });
+  });
+
+  describe('mutations.addPlugin', () => {
+    it('appends a plugin to an empty list', () => {
+      const s = makeState();
+      const plugin: PluginStub = { name: 'alpha' };
+
+      mutations.addPlugin(s, plugin as any);
+      expect(s.plugins).toStrictEqual([plugin]);
+    });
+
+    it('appends a plugin to an existing list', () => {
+      const s = makeState();
+      const first: PluginStub = { name: 'first' };
+      const second: PluginStub = { name: 'second' };
+
+      mutations.addPlugin(s, first as any);
+      mutations.addPlugin(s, second as any);
+      expect(s.plugins).toStrictEqual([first, second]);
+    });
+  });
+
+  describe('mutations.removePlugin', () => {
+    it('removes a plugin whose name matches', () => {
+      const s = makeState();
+      const plugin: PluginStub = { name: 'target' };
+
+      mutations.addPlugin(s, plugin as any);
+      mutations.removePlugin(s, 'target');
+      expect(s.plugins).toStrictEqual([]);
+    });
+
+    it('does nothing when no plugin with the given name exists', () => {
+      const s = makeState();
+      const plugin: PluginStub = { name: 'present' };
+
+      mutations.addPlugin(s, plugin as any);
+      mutations.removePlugin(s, 'absent');
+      expect(s.plugins).toStrictEqual([plugin]);
+    });
+
+    it('removes only the matching plugin when multiple are present', () => {
+      const s = makeState();
+      const a: PluginStub = { name: 'a' };
+      const b: PluginStub = { name: 'b' };
+      const c: PluginStub = { name: 'c' };
+
+      mutations.addPlugin(s, a as any);
+      mutations.addPlugin(s, b as any);
+      mutations.addPlugin(s, c as any);
+      mutations.removePlugin(s, 'b');
+      expect(s.plugins).toStrictEqual([a, c]);
+    });
+
+    it('removes the first occurrence when names are duplicated', () => {
+      const s = makeState();
+      const first: PluginStub = { name: 'dup' };
+      const second: PluginStub = { name: 'dup' };
+
+      mutations.addPlugin(s, first as any);
+      mutations.addPlugin(s, second as any);
+      mutations.removePlugin(s, 'dup');
+      expect(s.plugins).toStrictEqual([second]);
+    });
+  });
+
+  describe('mutations.setReady', () => {
+    it('sets ready to true', () => {
+      const s = makeState();
+
+      mutations.setReady(s, true);
+      expect(s.ready).toStrictEqual(true);
+    });
+
+    it('sets ready to false', () => {
+      const s = makeState();
+
+      s.ready = true;
+      mutations.setReady(s, false);
+      expect(s.ready).toStrictEqual(false);
+    });
+  });
+});