diff --git a/src/domains/reducers/domainsList.ts b/src/domains/reducers/domainsList.ts
index 40e0fcd6..1733384d 100644
--- a/src/domains/reducers/domainsList.ts
+++ b/src/domains/reducers/domainsList.ts
@@ -28,17 +28,21 @@ export interface DomainsList {
   errorData?: ProblemDetailsError;
 }
 
-type ListDomainsAction = PayloadAction<{
+interface ListDomains {
   domains: Domain[];
   defaultRedirects?: ShlinkDomainRedirects;
-}>;
+}
+
+type ListDomainsAction = PayloadAction<ListDomains>;
 
 type FilterDomainsAction = PayloadAction<string>;
 
-type ValidateDomain = PayloadAction<{
+interface ValidateDomain {
   domain: string;
   status: DomainStatus;
-}>;
+}
+
+type ValidateDomainAction = PayloadAction<ValidateDomain>;
 
 const initialState: DomainsList = {
   domains: [],
@@ -51,7 +55,7 @@ export type DomainsCombinedAction = ListDomainsAction
 & ApiErrorAction
 & FilterDomainsAction
 & EditDomainRedirectsAction
-& ValidateDomain;
+& ValidateDomainAction;
 
 export const replaceRedirectsOnDomain = (domain: string, redirects: ShlinkDomainRedirects) =>
   (d: Domain): Domain => (d.domain !== domain ? d : { ...d, redirects });
@@ -62,7 +66,7 @@ export const replaceStatusOnDomain = (domain: string, status: DomainStatus) =>
 const oldReducer = buildReducer<DomainsList, DomainsCombinedAction>({
   [LIST_DOMAINS_START]: () => ({ ...initialState, loading: true }),
   [LIST_DOMAINS_ERROR]: (_, { errorData }) => ({ ...initialState, error: true, errorData }),
-  [LIST_DOMAINS]: (_, { payload }) => ({ ...initialState, searchTerm: payload, filteredDomains: payload.domains }),
+  [LIST_DOMAINS]: (_, { payload }) => ({ ...initialState, domains: payload.domains, filteredDomains: payload.domains }),
   [FILTER_DOMAINS]: (state, { payload }) => ({
     ...state,
     filteredDomains: state.domains.filter(({ domain }) => domain.toLowerCase().match(payload.toLowerCase())),
@@ -112,7 +116,7 @@ export const checkDomainHealth = (buildShlinkApiClient: ShlinkApiClientBuilder)
   const { selectedServer } = getState();
 
   if (!hasServerData(selectedServer)) {
-    dispatch<ValidateDomain>({
+    dispatch<ValidateDomainAction>({
       type: VALIDATE_DOMAIN,
       payload: { domain, status: 'invalid' },
     });
@@ -129,12 +133,12 @@ export const checkDomainHealth = (buildShlinkApiClient: ShlinkApiClientBuilder)
 
     const { status } = await health();
 
-    dispatch<ValidateDomain>({
+    dispatch<ValidateDomainAction>({
       type: VALIDATE_DOMAIN,
       payload: { domain, status: status === 'pass' ? 'valid' : 'invalid' },
     });
   } catch (e) {
-    dispatch<ValidateDomain>({
+    dispatch<ValidateDomainAction>({
       type: VALIDATE_DOMAIN,
       payload: { domain, status: 'invalid' },
     });
@@ -143,10 +147,7 @@ export const checkDomainHealth = (buildShlinkApiClient: ShlinkApiClientBuilder)
 
 export const domainsReducerCreator = (buildShlinkApiClient: ShlinkApiClientBuilder) => {
   // eslint-disable-next-line @typescript-eslint/no-shadow
-  const listDomains = createAsyncThunk<{
-    domains: Domain[];
-    defaultRedirects?: ShlinkDomainRedirects;
-  }, void, { state: ShlinkState }>(
+  const listDomains = createAsyncThunk<ListDomains, void, { state: ShlinkState }>(
     LIST_DOMAINS,
     async (_, { getState }) => {
       const { listDomains: shlinkListDomains } = buildShlinkApiClient(getState);
@@ -160,7 +161,7 @@ export const domainsReducerCreator = (buildShlinkApiClient: ShlinkApiClientBuild
   );
 
   // eslint-disable-next-line @typescript-eslint/no-shadow
-  const checkDomainHealth = createAsyncThunk<{ domain: string; status: DomainStatus }, string, { state: ShlinkState }>(
+  const checkDomainHealth = createAsyncThunk<ValidateDomain, string, { state: ShlinkState }>(
     VALIDATE_DOMAIN,
     async (domain: string, { getState }) => {
       const { selectedServer } = getState();
diff --git a/test/domains/reducers/domainsList.test.ts b/test/domains/reducers/domainsList.test.ts
index b00704bd..6d406e5e 100644
--- a/test/domains/reducers/domainsList.test.ts
+++ b/test/domains/reducers/domainsList.test.ts
@@ -52,13 +52,13 @@ describe('domainsListReducer', () => {
     });
 
     it('returns domains on LIST_DOMAINS', () => {
-      expect(reducer(undefined, action(LIST_DOMAINS, { domains }))).toEqual(
+      expect(reducer(undefined, action(LIST_DOMAINS, { payload: { domains } } as any))).toEqual(
         { domains, filteredDomains: domains, loading: false, error: false },
       );
     });
 
     it('filters domains on FILTER_DOMAINS', () => {
-      expect(reducer(Mock.of<DomainsList>({ domains }), action(FILTER_DOMAINS, { searchTerm: 'oO' }))).toEqual(
+      expect(reducer(Mock.of<DomainsList>({ domains }), action(FILTER_DOMAINS, { payload: 'oO' as any }))).toEqual(
         { domains, filteredDomains },
       );
     });
@@ -90,7 +90,7 @@ describe('domainsListReducer', () => {
     ])('replaces status on proper domain on VALIDATE_DOMAIN', (domain) => {
       expect(reducer(
         Mock.of<DomainsList>({ domains, filteredDomains }),
-        action(VALIDATE_DOMAIN, { domain, status: 'valid' }),
+        action(VALIDATE_DOMAIN, { payload: { domain, status: 'valid' } } as any),
       )).toEqual({
         domains: domains.map(replaceStatusOnDomain(domain, 'valid')),
         filteredDomains: filteredDomains.map(replaceStatusOnDomain(domain, 'valid')),
@@ -117,7 +117,10 @@ describe('domainsListReducer', () => {
 
       expect(dispatch).toHaveBeenCalledTimes(2);
       expect(dispatch).toHaveBeenNthCalledWith(1, { type: LIST_DOMAINS_START });
-      expect(dispatch).toHaveBeenNthCalledWith(2, { type: LIST_DOMAINS, domains, defaultRedirects: undefined });
+      expect(dispatch).toHaveBeenNthCalledWith(2, {
+        type: LIST_DOMAINS,
+        payload: { domains },
+      });
       expect(listDomains).toHaveBeenCalledTimes(1);
     });
   });
@@ -128,7 +131,7 @@ describe('domainsListReducer', () => {
       ['bar'],
       ['something'],
     ])('creates action as expected', (searchTerm) => {
-      expect(filterDomainsAction(searchTerm)).toEqual({ type: FILTER_DOMAINS, searchTerm });
+      expect(filterDomainsAction(searchTerm)).toEqual({ type: FILTER_DOMAINS, payload: searchTerm });
     });
   });
 
@@ -145,7 +148,10 @@ describe('domainsListReducer', () => {
       expect(getState).toHaveBeenCalledTimes(1);
       expect(health).not.toHaveBeenCalled();
       expect(dispatch).toHaveBeenCalledTimes(1);
-      expect(dispatch).toHaveBeenCalledWith({ type: VALIDATE_DOMAIN, domain, status: 'invalid' });
+      expect(dispatch).toHaveBeenCalledWith({
+        type: VALIDATE_DOMAIN,
+        payload: { domain, status: 'invalid' },
+      });
     });
 
     it('dispatches invalid status when health endpoint returns an error', async () => {
@@ -162,7 +168,10 @@ describe('domainsListReducer', () => {
       expect(getState).toHaveBeenCalledTimes(1);
       expect(health).toHaveBeenCalledTimes(1);
       expect(dispatch).toHaveBeenCalledTimes(1);
-      expect(dispatch).toHaveBeenCalledWith({ type: VALIDATE_DOMAIN, domain, status: 'invalid' });
+      expect(dispatch).toHaveBeenCalledWith({
+        type: VALIDATE_DOMAIN,
+        payload: { domain, status: 'invalid' },
+      });
     });
 
     it.each([
@@ -185,7 +194,10 @@ describe('domainsListReducer', () => {
       expect(getState).toHaveBeenCalledTimes(1);
       expect(health).toHaveBeenCalledTimes(1);
       expect(dispatch).toHaveBeenCalledTimes(1);
-      expect(dispatch).toHaveBeenCalledWith({ type: VALIDATE_DOMAIN, domain, status: expectedStatus });
+      expect(dispatch).toHaveBeenCalledWith({
+        type: VALIDATE_DOMAIN,
+        payload: { domain, status: expectedStatus },
+      });
     });
   });
 });