diff --git a/src/domains/reducers/domainsList.ts b/src/domains/reducers/domainsList.ts
index abb8c15f..4a51acab 100644
--- a/src/domains/reducers/domainsList.ts
+++ b/src/domains/reducers/domainsList.ts
@@ -16,7 +16,7 @@ export interface DomainsList {
   error: boolean;
 }
 
-interface ListDomainsAction extends Action<string> {
+export interface ListDomainsAction extends Action<string> {
   domains: ShlinkDomain[];
 }
 
diff --git a/test/domains/reducers/domainsList.test.ts b/test/domains/reducers/domainsList.test.ts
new file mode 100644
index 00000000..1e090770
--- /dev/null
+++ b/test/domains/reducers/domainsList.test.ts
@@ -0,0 +1,63 @@
+import { Mock } from 'ts-mockery';
+import reducer, {
+  LIST_DOMAINS,
+  LIST_DOMAINS_ERROR,
+  LIST_DOMAINS_START,
+  ListDomainsAction,
+  listDomains as listDomainsAction,
+} from '../../../src/domains/reducers/domainsList';
+import { ShlinkDomain } from '../../../src/utils/services/types';
+import ShlinkApiClient from '../../../src/utils/services/ShlinkApiClient';
+
+describe('domainsList', () => {
+  const domains = [ Mock.all<ShlinkDomain>(), Mock.all<ShlinkDomain>(), Mock.all<ShlinkDomain>() ];
+
+  describe('reducer', () => {
+    const action = (type: string, args: Partial<ListDomainsAction> = {}) => Mock.of<ListDomainsAction>(
+      { type, ...args },
+    );
+
+    it('returns loading on LIST_DOMAINS_START', () => {
+      expect(reducer(undefined, action(LIST_DOMAINS_START))).toEqual({ domains: [], loading: true, error: false });
+    });
+
+    it('returns error on LIST_DOMAINS_ERROR', () => {
+      expect(reducer(undefined, action(LIST_DOMAINS_ERROR))).toEqual({ domains: [], loading: false, error: true });
+    });
+
+    it('returns domains on LIST_DOMAINS', () => {
+      expect(reducer(undefined, action(LIST_DOMAINS, { domains }))).toEqual({ domains, loading: false, error: false });
+    });
+  });
+
+  describe('listDomains', () => {
+    const dispatch = jest.fn();
+    const getState = jest.fn();
+    const listDomains = jest.fn();
+    const buildShlinkApiClient = () => Mock.of<ShlinkApiClient>({ listDomains });
+
+    beforeEach(jest.clearAllMocks);
+
+    it('dispatches error when loading domains fails', async () => {
+      listDomains.mockRejectedValue(new Error('error'));
+
+      await listDomainsAction(buildShlinkApiClient)()(dispatch, getState);
+
+      expect(dispatch).toHaveBeenCalledTimes(2);
+      expect(dispatch).toHaveBeenNthCalledWith(1, { type: LIST_DOMAINS_START });
+      expect(dispatch).toHaveBeenNthCalledWith(2, { type: LIST_DOMAINS_ERROR });
+      expect(listDomains).toHaveBeenCalledTimes(1);
+    });
+
+    it('dispatches domains once loaded', async () => {
+      listDomains.mockResolvedValue(domains);
+
+      await listDomainsAction(buildShlinkApiClient)()(dispatch, getState);
+
+      expect(dispatch).toHaveBeenCalledTimes(2);
+      expect(dispatch).toHaveBeenNthCalledWith(1, { type: LIST_DOMAINS_START });
+      expect(dispatch).toHaveBeenNthCalledWith(2, { type: LIST_DOMAINS, domains });
+      expect(listDomains).toHaveBeenCalledTimes(1);
+    });
+  });
+});