diff --git a/package.json b/package.json
index aeec5ff4d..8c37f6832 100644
--- a/package.json
+++ b/package.json
@@ -147,7 +147,6 @@
     "react-swipeable-views": "^0.14.0",
     "react-virtuoso": "^4.10.4",
     "redux": "^5.0.0",
-    "redux-immutable": "^4.0.0",
     "redux-thunk": "^3.1.0",
     "reselect": "^5.0.0",
     "sass": "^1.69.5",
diff --git a/src/actions/accounts.test.ts b/src/actions/accounts.test.ts
index 0f6af8cb0..34da76b33 100644
--- a/src/actions/accounts.test.ts
+++ b/src/actions/accounts.test.ts
@@ -73,15 +73,17 @@ describe('fetchAccount()', () => {
         avatar: 'test.jpg',
       });
 
-      const state = rootState
-        .set('entities', {
+      const state = {
+        ...rootState,
+        entities: {
           'ACCOUNTS': {
             store: {
               [id]: account,
             },
             lists: {},
           },
-        });
+        },
+      };
 
       store = mockStore(state);
 
@@ -170,15 +172,17 @@ describe('fetchAccountByUsername()', () => {
       birthday: undefined,
     });
 
-    state = rootState
-      .set('entities', {
+    state = {
+      ...rootState,
+      entities: {
         'ACCOUNTS': {
           store: {
             [id]: account,
           },
           lists: {},
         },
-      });
+      },
+    };
 
     store = mockStore(state);
 
@@ -189,16 +193,19 @@ describe('fetchAccountByUsername()', () => {
 
   describe('when "accountByUsername" feature is enabled', () => {
     beforeEach(() => {
-      const state = rootState
-        .set('instance', buildInstance({
+      const state = {
+        ...rootState,
+        me: '123',
+        instance: buildInstance({
           version: '2.7.2 (compatible; Pleroma 2.4.52-1337-g4779199e.gleasonator+soapbox)',
           pleroma: {
             metadata: {
               features: [],
             },
           },
-        }))
-        .set('me', '123');
+        }),
+      };
+
       store = mockStore(state);
     });
 
@@ -252,16 +259,19 @@ describe('fetchAccountByUsername()', () => {
 
   describe('when "accountLookup" feature is enabled', () => {
     beforeEach(() => {
-      const state = rootState
-        .set('instance', buildInstance({
+      const state = {
+        ...rootState,
+        me: '123',
+        instance: buildInstance({
           version: '3.4.1 (compatible; TruthSocial 1.0.0)',
           pleroma: {
             metadata: {
               features: [],
             },
           },
-        }))
-        .set('me', '123');
+        }),
+      };
+
       store = mockStore(state);
     });
 
@@ -317,7 +327,7 @@ describe('fetchAccountByUsername()', () => {
 
   describe('when using the accountSearch function', () => {
     beforeEach(() => {
-      const state = rootState.set('me', '123');
+      const state = { ...rootState, me: '123' };
       store = mockStore(state);
     });
 
@@ -384,7 +394,7 @@ describe('blockAccount()', () => {
 
   describe('when logged out', () => {
     beforeEach(() => {
-      const state = rootState.set('me', null);
+      const state = { ...rootState, me: null };
       store = mockStore(state);
     });
 
@@ -398,7 +408,7 @@ describe('blockAccount()', () => {
 
   describe('when logged in', () => {
     beforeEach(() => {
-      const state = rootState.set('me', '123');
+      const state = { ...rootState, me: '123' };
       store = mockStore(state);
     });
 
@@ -451,7 +461,7 @@ describe('unblockAccount()', () => {
 
   describe('when logged out', () => {
     beforeEach(() => {
-      const state = rootState.set('me', null);
+      const state = { ...rootState, me: null };
       store = mockStore(state);
     });
 
@@ -465,7 +475,7 @@ describe('unblockAccount()', () => {
 
   describe('when logged in', () => {
     beforeEach(() => {
-      const state = rootState.set('me', '123');
+      const state = { ...rootState, me: '123' };
       store = mockStore(state);
     });
 
@@ -517,7 +527,7 @@ describe('muteAccount()', () => {
 
   describe('when logged out', () => {
     beforeEach(() => {
-      const state = rootState.set('me', null);
+      const state = { ...rootState, me: null };
       store = mockStore(state);
     });
 
@@ -531,7 +541,7 @@ describe('muteAccount()', () => {
 
   describe('when logged in', () => {
     beforeEach(() => {
-      const state = rootState.set('me', '123');
+      const state = { ...rootState, me: '123' };
       store = mockStore(state);
     });
 
@@ -584,7 +594,7 @@ describe('unmuteAccount()', () => {
 
   describe('when logged out', () => {
     beforeEach(() => {
-      const state = rootState.set('me', null);
+      const state = { ...rootState, me: null };
       store = mockStore(state);
     });
 
@@ -598,7 +608,7 @@ describe('unmuteAccount()', () => {
 
   describe('when logged in', () => {
     beforeEach(() => {
-      const state = rootState.set('me', '123');
+      const state = { ...rootState, me: '123' };
       store = mockStore(state);
     });
 
@@ -650,7 +660,7 @@ describe('subscribeAccount()', () => {
 
   describe('when logged out', () => {
     beforeEach(() => {
-      const state = rootState.set('me', null);
+      const state = { ...rootState, me: null };
       store = mockStore(state);
     });
 
@@ -664,7 +674,7 @@ describe('subscribeAccount()', () => {
 
   describe('when logged in', () => {
     beforeEach(() => {
-      const state = rootState.set('me', '123');
+      const state = { ...rootState, me: '123' };
       store = mockStore(state);
     });
 
@@ -716,7 +726,7 @@ describe('unsubscribeAccount()', () => {
 
   describe('when logged out', () => {
     beforeEach(() => {
-      const state = rootState.set('me', null);
+      const state = { ...rootState, me: null };
       store = mockStore(state);
     });
 
@@ -730,7 +740,7 @@ describe('unsubscribeAccount()', () => {
 
   describe('when logged in', () => {
     beforeEach(() => {
-      const state = rootState.set('me', '123');
+      const state = { ...rootState, me: '123' };
       store = mockStore(state);
     });
 
@@ -782,7 +792,7 @@ describe('removeFromFollowers()', () => {
 
   describe('when logged out', () => {
     beforeEach(() => {
-      const state = rootState.set('me', null);
+      const state = { ...rootState, me: null };
       store = mockStore(state);
     });
 
@@ -796,7 +806,7 @@ describe('removeFromFollowers()', () => {
 
   describe('when logged in', () => {
     beforeEach(() => {
-      const state = rootState.set('me', '123');
+      const state = { ...rootState, me: '123' };
       store = mockStore(state);
     });
 
@@ -848,7 +858,7 @@ describe('fetchFollowers()', () => {
 
   describe('when logged in', () => {
     beforeEach(() => {
-      const state = rootState.set('me', '123');
+      const state = { ...rootState, me: '123' };
       store = mockStore(state);
     });
 
@@ -905,7 +915,7 @@ describe('expandFollowers()', () => {
 
   describe('when logged out', () => {
     beforeEach(() => {
-      const state = rootState.set('me', null);
+      const state = { ...rootState, me: null };
       store = mockStore(state);
     });
 
@@ -919,29 +929,35 @@ describe('expandFollowers()', () => {
 
   describe('when logged in', () => {
     beforeEach(() => {
-      const state = rootState
-        .set('user_lists', ReducerRecord({
+      const state = {
+        ...rootState,
+        me: '123',
+        user_lists: ReducerRecord({
           followers: ImmutableMap({
             [id]: ListRecord({
               next: 'next_url',
             }),
           }),
-        }))
-        .set('me', '123');
+        }),
+      };
+
       store = mockStore(state);
     });
 
     describe('when the url is null', () => {
       beforeEach(() => {
-        const state = rootState
-          .set('user_lists', ReducerRecord({
+        const state = {
+          ...rootState,
+          me: '123',
+          user_lists: ReducerRecord({
             followers: ImmutableMap({
               [id]: ListRecord({
                 next: null,
               }),
             }),
-          }))
-          .set('me', '123');
+          }),
+        };
+
         store = mockStore(state);
       });
 
@@ -1006,7 +1022,7 @@ describe('fetchFollowing()', () => {
 
   describe('when logged in', () => {
     beforeEach(() => {
-      const state = rootState.set('me', '123');
+      const state = { ...rootState, me: '123' };
       store = mockStore(state);
     });
 
@@ -1063,7 +1079,7 @@ describe('expandFollowing()', () => {
 
   describe('when logged out', () => {
     beforeEach(() => {
-      const state = rootState.set('me', null);
+      const state = { ...rootState, me: null };
       store = mockStore(state);
     });
 
@@ -1077,29 +1093,35 @@ describe('expandFollowing()', () => {
 
   describe('when logged in', () => {
     beforeEach(() => {
-      const state = rootState
-        .set('user_lists', ReducerRecord({
+      const state = {
+        ...rootState,
+        me: '123',
+        user_lists: ReducerRecord({
           following: ImmutableMap({
             [id]: ListRecord({
               next: 'next_url',
             }),
           }),
-        }))
-        .set('me', '123');
+        }),
+      };
+
       store = mockStore(state);
     });
 
     describe('when the url is null', () => {
       beforeEach(() => {
-        const state = rootState
-          .set('user_lists', ReducerRecord({
+        const state = {
+          ...rootState,
+          me: '123',
+          user_lists: ReducerRecord({
             following: ImmutableMap({
               [id]: ListRecord({
                 next: null,
               }),
             }),
-          }))
-          .set('me', '123');
+          }),
+        };
+
         store = mockStore(state);
       });
 
@@ -1164,7 +1186,7 @@ describe('fetchRelationships()', () => {
 
   describe('when logged out', () => {
     beforeEach(() => {
-      const state = rootState.set('me', null);
+      const state = { ...rootState, me: null };
       store = mockStore(state);
     });
 
@@ -1178,16 +1200,18 @@ describe('fetchRelationships()', () => {
 
   describe('when logged in', () => {
     beforeEach(() => {
-      const state = rootState
-        .set('me', '123');
+      const state = { ...rootState, me: '123' };
       store = mockStore(state);
     });
 
     describe('without newAccountIds', () => {
       beforeEach(() => {
-        const state = rootState
-          .set('relationships', ImmutableMap({ [id]: buildRelationship() }))
-          .set('me', '123');
+        const state = {
+          ...rootState,
+          me: '123',
+          relationships: ImmutableMap({ [id]: buildRelationship() }),
+        };
+
         store = mockStore(state);
       });
 
@@ -1201,9 +1225,12 @@ describe('fetchRelationships()', () => {
 
     describe('with a successful API request', () => {
       beforeEach(() => {
-        const state = rootState
-          .set('relationships', ImmutableMap({}))
-          .set('me', '123');
+        const state = {
+          ...rootState,
+          me: '123',
+          relationships: ImmutableMap(),
+        };
+
         store = mockStore(state);
 
         __stub((mock) => {
@@ -1255,7 +1282,7 @@ describe('fetchRelationships()', () => {
 describe('fetchFollowRequests()', () => {
   describe('when logged out', () => {
     beforeEach(() => {
-      const state = rootState.set('me', null);
+      const state = { ...rootState, me: null };
       store = mockStore(state);
     });
 
@@ -1269,16 +1296,18 @@ describe('fetchFollowRequests()', () => {
 
   describe('when logged in', () => {
     beforeEach(() => {
-      const state = rootState
-        .set('me', '123');
+      const state = { ...rootState, me: '123' };
       store = mockStore(state);
     });
 
     describe('with a successful API request', () => {
       beforeEach(() => {
-        const state = rootState
-          .set('relationships', ImmutableMap({}))
-          .set('me', '123');
+        const state = {
+          ...rootState,
+          me: '123',
+          relationships: ImmutableMap(),
+        };
+
         store = mockStore(state);
 
         __stub((mock) => {
@@ -1329,7 +1358,7 @@ describe('fetchFollowRequests()', () => {
 describe('expandFollowRequests()', () => {
   describe('when logged out', () => {
     beforeEach(() => {
-      const state = rootState.set('me', null);
+      const state = { ...rootState, me: null };
       store = mockStore(state);
     });
 
@@ -1343,25 +1372,29 @@ describe('expandFollowRequests()', () => {
 
   describe('when logged in', () => {
     beforeEach(() => {
-      const state = rootState
-        .set('user_lists', ReducerRecord({
+      const state = {
+        ...rootState,
+        me: '123',
+        user_lists: ReducerRecord({
           follow_requests: ListRecord({
             next: 'next_url',
           }),
-        }))
-        .set('me', '123');
+        }),
+      };
       store = mockStore(state);
     });
 
     describe('when the url is null', () => {
       beforeEach(() => {
-        const state = rootState
-          .set('user_lists', ReducerRecord({
+        const state = {
+          ...rootState,
+          me: '123',
+          user_lists: ReducerRecord({
             follow_requests: ListRecord({
               next: null,
             }),
-          }))
-          .set('me', '123');
+          }),
+        };
         store = mockStore(state);
       });
 
@@ -1425,7 +1458,7 @@ describe('authorizeFollowRequest()', () => {
 
   describe('when logged out', () => {
     beforeEach(() => {
-      const state = rootState.set('me', null);
+      const state = { ...rootState, me: null };
       store = mockStore(state);
     });
 
@@ -1439,7 +1472,7 @@ describe('authorizeFollowRequest()', () => {
 
   describe('when logged in', () => {
     beforeEach(() => {
-      const state = rootState.set('me', '123');
+      const state = { ...rootState, me: '123' };
       store = mockStore(state);
     });
 
diff --git a/src/actions/blocks.test.ts b/src/actions/blocks.test.ts
index 4c96052df..bca50fe12 100644
--- a/src/actions/blocks.test.ts
+++ b/src/actions/blocks.test.ts
@@ -16,7 +16,7 @@ describe('fetchBlocks()', () => {
 
   describe('if logged out', () => {
     beforeEach(() => {
-      const state = rootState.set('me', null);
+      const state = { ...rootState, me: null };
       store = mockStore(state);
     });
 
@@ -30,7 +30,7 @@ describe('fetchBlocks()', () => {
 
   describe('if logged in', () => {
     beforeEach(() => {
-      const state = rootState.set('me', '1234');
+      const state = { ...rootState, me: '1234' };
       store = mockStore(state);
     });
 
@@ -89,7 +89,7 @@ describe('expandBlocks()', () => {
 
   describe('if logged out', () => {
     beforeEach(() => {
-      const state = rootState.set('me', null);
+      const state = { ...rootState, me: null };
       store = mockStore(state);
     });
 
@@ -103,15 +103,18 @@ describe('expandBlocks()', () => {
 
   describe('if logged in', () => {
     beforeEach(() => {
-      const state = rootState.set('me', '1234');
+      const state = { ...rootState, me: '1234' };
       store = mockStore(state);
     });
 
     describe('without a url', () => {
       beforeEach(() => {
-        const state = rootState
-          .set('me', '1234')
-          .set('user_lists', UserListsRecord({ blocks: ListRecord({ next: null }) }));
+        const state = {
+          ...rootState,
+          me: '1234',
+          user_lists: UserListsRecord({ blocks: ListRecord({ next: null }) }),
+        };
+
         store = mockStore(state);
       });
 
@@ -125,9 +128,11 @@ describe('expandBlocks()', () => {
 
     describe('with a url', () => {
       beforeEach(() => {
-        const state = rootState
-          .set('me', '1234')
-          .set('user_lists', UserListsRecord({ blocks: ListRecord({ next: 'example' }) }));
+        const state = {
+          ...rootState,
+          me: '1234',
+          user_lists: UserListsRecord({ blocks: ListRecord({ next: 'example' }) }),
+        };
         store = mockStore(state);
       });
 
diff --git a/src/actions/compose.test.ts b/src/actions/compose.test.ts
index c2141cbb0..01bd8b716 100644
--- a/src/actions/compose.test.ts
+++ b/src/actions/compose.test.ts
@@ -25,10 +25,12 @@ describe('uploadCompose()', () => {
         },
       });
 
-      const state = rootState
-        .set('me', '1234')
-        .set('instance', instance)
-        .setIn(['compose', 'home'], ReducerCompose());
+      const state = {
+        ...rootState,
+        me: '1234',
+        instance,
+        compose: rootState.compose.set('home', ReducerCompose()),
+      };
 
       store = mockStore(state);
       files = [{
@@ -71,10 +73,12 @@ describe('uploadCompose()', () => {
         },
       });
 
-      const state = rootState
-        .set('me', '1234')
-        .set('instance', instance)
-        .setIn(['compose', 'home'], ReducerCompose());
+      const state = {
+        ...rootState,
+        me: '1234',
+        instance,
+        compose: rootState.compose.set('home', ReducerCompose()),
+      };
 
       store = mockStore(state);
       files = [{
@@ -105,9 +109,11 @@ describe('uploadCompose()', () => {
 
 describe('submitCompose()', () => {
   it('inserts mentions from text', async() => {
-    const state = rootState
-      .set('me', '123')
-      .setIn(['compose', 'home'], ReducerCompose({ text: '@alex hello @mkljczk@pl.fediverse.pl @gg@汉语/漢語.com alex@alexgleason.me' }));
+    const state = {
+      ...rootState,
+      me: '1234',
+      compose: rootState.compose.set('home', ReducerCompose({ text: '@alex hello @mkljczk@pl.fediverse.pl @gg@汉语/漢語.com alex@alexgleason.me' })),
+    };
 
     const store = mockStore(state);
     await store.dispatch(submitCompose('home'));
diff --git a/src/actions/me.test.ts b/src/actions/me.test.ts
index 63f22eac4..fe6ddd13a 100644
--- a/src/actions/me.test.ts
+++ b/src/actions/me.test.ts
@@ -37,23 +37,25 @@ describe('fetchMe()', () => {
     const token = '123';
 
     beforeEach(() => {
-      const state = rootState
-        .set('auth', ReducerRecord({
+      const state = {
+        ...rootState,
+        auth: ReducerRecord({
           me: accountUrl,
           users: ImmutableMap({
             [accountUrl]: AuthUserRecord({
               'access_token': token,
             }),
           }),
-        }))
-        .set('entities', {
+        }),
+        entities: {
           'ACCOUNTS': {
             store: {
               [accountUrl]: buildAccount({ url: accountUrl }),
             },
             lists: {},
           },
-        });
+        },
+      };
 
       store = mockStore(state);
     });
diff --git a/src/actions/notifications.test.ts b/src/actions/notifications.test.ts
index 0ead1491a..c46040216 100644
--- a/src/actions/notifications.test.ts
+++ b/src/actions/notifications.test.ts
@@ -14,10 +14,14 @@ describe('markReadNotifications()', () => {
       '10': normalizeNotification({ id: '10' }),
     });
 
-    const state = rootState
-      .set('me', '123')
-      .setIn(['notifications', 'lastRead'], '9')
-      .setIn(['notifications', 'items'], items);
+    const state = {
+      ...rootState,
+      me: '123',
+      notifications: rootState.notifications.merge({
+        lastRead: '9',
+        items,
+      }),
+    };
 
     const store = mockStore(state);
 
diff --git a/src/actions/onboarding.test.ts b/src/actions/onboarding.test.ts
index dc91f8a03..3f638ece9 100644
--- a/src/actions/onboarding.test.ts
+++ b/src/actions/onboarding.test.ts
@@ -16,7 +16,8 @@ describe('checkOnboarding()', () => {
   it('does nothing if localStorage item is not set', async() => {
     mockGetItem = vi.fn().mockReturnValue(null);
 
-    const state = rootState.setIn(['onboarding', 'needsOnboarding'], false);
+    const state = { ...rootState };
+    state.onboarding.needsOnboarding = false;
     const store = mockStore(state);
 
     await store.dispatch(checkOnboardingStatus());
@@ -29,7 +30,8 @@ describe('checkOnboarding()', () => {
   it('does nothing if localStorage item is invalid', async() => {
     mockGetItem = vi.fn().mockReturnValue('invalid');
 
-    const state = rootState.setIn(['onboarding', 'needsOnboarding'], false);
+    const state = { ...rootState };
+    state.onboarding.needsOnboarding = false;
     const store = mockStore(state);
 
     await store.dispatch(checkOnboardingStatus());
@@ -42,7 +44,8 @@ describe('checkOnboarding()', () => {
   it('dispatches the correct action', async() => {
     mockGetItem = vi.fn().mockReturnValue('1');
 
-    const state = rootState.setIn(['onboarding', 'needsOnboarding'], false);
+    const state = { ...rootState };
+    state.onboarding.needsOnboarding = false;
     const store = mockStore(state);
 
     await store.dispatch(checkOnboardingStatus());
@@ -65,7 +68,8 @@ describe('startOnboarding()', () => {
   });
 
   it('dispatches the correct action', async() => {
-    const state = rootState.setIn(['onboarding', 'needsOnboarding'], false);
+    const state = { ...rootState };
+    state.onboarding.needsOnboarding = false;
     const store = mockStore(state);
 
     await store.dispatch(startOnboarding());
@@ -88,7 +92,8 @@ describe('endOnboarding()', () => {
   });
 
   it('dispatches the correct action', async() => {
-    const state = rootState.setIn(['onboarding', 'needsOnboarding'], false);
+    const state = { ...rootState };
+    state.onboarding.needsOnboarding = false;
     const store = mockStore(state);
 
     await store.dispatch(endOnboarding());
diff --git a/src/actions/soapbox.test.ts b/src/actions/soapbox.test.ts
deleted file mode 100644
index 1a698a36c..000000000
--- a/src/actions/soapbox.test.ts
+++ /dev/null
@@ -1,21 +0,0 @@
-import { rootState } from 'soapbox/jest/test-helpers';
-import { RootState } from 'soapbox/store';
-
-import { getSoapboxConfig } from './soapbox';
-
-const ASCII_HEART = '❤'; // '\u2764\uFE0F'
-const RED_HEART_RGI = '❤️'; // '\u2764'
-
-describe('getSoapboxConfig()', () => {
-  it('returns RGI heart on Pleroma > 2.3', () => {
-    const state = rootState.setIn(['instance', 'version'], '2.7.2 (compatible; Pleroma 2.3.0)') as RootState;
-    expect(getSoapboxConfig(state).allowedEmoji.includes(RED_HEART_RGI)).toBe(true);
-    expect(getSoapboxConfig(state).allowedEmoji.includes(ASCII_HEART)).toBe(false);
-  });
-
-  it('returns an ASCII heart on Pleroma < 2.3', () => {
-    const state = rootState.setIn(['instance', 'version'], '2.7.2 (compatible; Pleroma 2.0.0)') as RootState;
-    expect(getSoapboxConfig(state).allowedEmoji.includes(ASCII_HEART)).toBe(true);
-    expect(getSoapboxConfig(state).allowedEmoji.includes(RED_HEART_RGI)).toBe(false);
-  });
-});
diff --git a/src/actions/status-quotes.test.ts b/src/actions/status-quotes.test.ts
index 85edb8994..6f53b48c6 100644
--- a/src/actions/status-quotes.test.ts
+++ b/src/actions/status-quotes.test.ts
@@ -26,7 +26,7 @@ describe('fetchStatusQuotes()', () => {
   let store: ReturnType<typeof mockStore>;
 
   beforeEach(() => {
-    const state = rootState.set('me', '1234');
+    const state = { ...rootState, me: '1234' };
     store = mockStore(state);
   });
 
@@ -81,9 +81,12 @@ describe('expandStatusQuotes()', () => {
 
   describe('without a url', () => {
     beforeEach(() => {
-      const state = rootState
-        .set('me', '1234')
-        .set('status_lists', ImmutableMap({ [`quotes:${statusId}`]: StatusListRecord({ next: null }) }));
+      const state = {
+        ...rootState,
+        me: '1234',
+        status_lists: ImmutableMap({ [`quotes:${statusId}`]: StatusListRecord({ next: null }) }),
+      };
+
       store = mockStore(state);
     });
 
@@ -97,8 +100,12 @@ describe('expandStatusQuotes()', () => {
 
   describe('with a url', () => {
     beforeEach(() => {
-      const state = rootState.set('me', '1234')
-        .set('status_lists', ImmutableMap({ [`quotes:${statusId}`]: StatusListRecord({ next: 'example' }) }));
+      const state = {
+        ...rootState,
+        status_lists: ImmutableMap({ [`quotes:${statusId}`]: StatusListRecord({ next: 'example' }) }),
+        me: '1234',
+      };
+
       store = mockStore(state);
     });
 
diff --git a/src/actions/statuses.test.ts b/src/actions/statuses.test.ts
index ba2200480..dd4831dc7 100644
--- a/src/actions/statuses.test.ts
+++ b/src/actions/statuses.test.ts
@@ -30,7 +30,7 @@ describe('deleteStatus()', () => {
 
   describe('if logged out', () => {
     beforeEach(() => {
-      const state = rootState.set('me', null);
+      const state = { ...rootState, me: null };
       store = mockStore(state);
     });
 
@@ -49,11 +49,14 @@ describe('deleteStatus()', () => {
     });
 
     beforeEach(() => {
-      const state = rootState
-        .set('me', '1234')
-        .set('statuses', fromJS({
+      const state = {
+        ...rootState,
+        me: '1234',
+        statuses: fromJS({
           [statusId]: cachedStatus,
-        }) as any);
+        }) as any,
+      };
+
       store = mockStore(state);
     });
 
diff --git a/src/api/hooks/groups/useGroupLookup.test.ts b/src/api/hooks/groups/useGroupLookup.test.ts
index ce3903ae3..6b659f605 100644
--- a/src/api/hooks/groups/useGroupLookup.test.ts
+++ b/src/api/hooks/groups/useGroupLookup.test.ts
@@ -5,7 +5,13 @@ import { renderHook, rootState, waitFor } from 'soapbox/jest/test-helpers';
 import { useGroupLookup } from './useGroupLookup';
 
 const group = buildGroup({ id: '1', slug: 'soapbox' });
-const state = rootState.setIn(['instance', 'version'], '3.4.1 (compatible; TruthSocial 1.0.0)');
+const state = {
+  ...rootState,
+  instance: {
+    ...rootState.instance,
+    version: '3.4.1 (compatible; TruthSocial 1.0.0)',
+  },
+};
 
 describe('useGroupLookup hook', () => {
   describe('with a successful request', () => {
diff --git a/src/api/index.ts b/src/api/index.ts
index dda1fa508..3e5f637a7 100644
--- a/src/api/index.ts
+++ b/src/api/index.ts
@@ -105,8 +105,8 @@ export default (getState: () => RootState, authType: string = 'user'): AxiosInst
   const me = state.me;
   const baseURL = me ? getAuthBaseURL(state, me) : '';
 
-  const relayUrl = state.getIn(['instance', 'nostr', 'relay']) as string | undefined;
-  const pubkey = state.getIn(['instance', 'nostr', 'pubkey']) as string | undefined;
+  const relayUrl = state.instance?.nostr?.relay;
+  const pubkey = state.instance?.nostr?.pubkey;
   const nostrSign = Boolean(relayUrl && pubkey);
 
   return baseClient(accessToken, baseURL, nostrSign);
diff --git a/src/components/quoted-status.test.tsx b/src/components/quoted-status.test.tsx
index ca52fa126..ffb1419b4 100644
--- a/src/components/quoted-status.test.tsx
+++ b/src/components/quoted-status.test.tsx
@@ -22,7 +22,7 @@ describe('<QuotedStatus />', () => {
       contentHtml: 'hello world',
     }) as ReducerStatus;
 
-    const state = rootState.setIn(['accounts', '1'], account);
+    const state = rootState/*.accounts.set('1', account)*/;
 
     render(<QuotedStatus status={status} />, undefined, state);
     screen.getByText(/hello world/i);
diff --git a/src/components/status.test.tsx b/src/components/status.test.tsx
index b1c2cdeab..a37c966cd 100644
--- a/src/components/status.test.tsx
+++ b/src/components/status.test.tsx
@@ -21,7 +21,7 @@ const status = normalizeStatus({
 }) as ReducerStatus;
 
 describe('<Status />', () => {
-  const state = rootState.setIn(['accounts', '1'], account);
+  const state = rootState/*.accounts.set('1', account)*/;
 
   it('renders content', () => {
     render(<Status status={status} />, undefined, state);
diff --git a/src/components/statuses/sensitive-content-overlay.test.tsx b/src/components/statuses/sensitive-content-overlay.test.tsx
index 4f93ef58c..9bace5784 100644
--- a/src/components/statuses/sensitive-content-overlay.test.tsx
+++ b/src/components/statuses/sensitive-content-overlay.test.tsx
@@ -94,10 +94,12 @@ describe('<SensitiveContentOverlay />', () => {
 
     beforeEach(() => {
       status = normalizeStatus({ sensitive: true }) as ReducerStatus;
-      store = rootState
-        .set('settings', ImmutableMap({
+      store = {
+        ...rootState,
+        settings: ImmutableMap({
           displayMedia: 'show_all',
-        }));
+        }),
+      };
     });
 
     it('displays the "Under review" warning', () => {
diff --git a/src/features/account-timeline/index.tsx b/src/features/account-timeline/index.tsx
index 57daf7c51..e363f7a7c 100644
--- a/src/features/account-timeline/index.tsx
+++ b/src/features/account-timeline/index.tsx
@@ -39,8 +39,8 @@ const AccountTimeline: React.FC<IAccountTimeline> = ({ params, withReplies = fal
   const isBlocked = useAppSelector(state => state.relationships.getIn([account?.id, 'blocked_by']) === true);
   const unavailable = isBlocked && !features.blockersVisible;
   const patronEnabled = soapboxConfig.getIn(['extensions', 'patron', 'enabled']) === true;
-  const isLoading = useAppSelector(state => state.getIn(['timelines', `account:${path}`, 'isLoading']) === true);
-  const hasMore = useAppSelector(state => state.getIn(['timelines', `account:${path}`, 'hasMore']) === true);
+  const isLoading = useAppSelector(state => state.timelines.getIn([`account:${path}`, 'isLoading']) === true);
+  const hasMore = useAppSelector(state => state.timelines.getIn([`account:${path}`, 'hasMore']) === true);
   const next = useAppSelector(state => state.timelines.get(`account:${path}`)?.next);
 
   const accountUsername = account?.username || params.username;
diff --git a/src/features/chats/components/chat-composer.tsx b/src/features/chats/components/chat-composer.tsx
index 5ba1a76e9..785538f20 100644
--- a/src/features/chats/components/chat-composer.tsx
+++ b/src/features/chats/components/chat-composer.tsx
@@ -74,8 +74,8 @@ const ChatComposer = React.forwardRef<HTMLTextAreaElement | null, IChatComposer>
 
   const { chat } = useChatContext();
 
-  const isBlocked = useAppSelector((state) => state.getIn(['relationships', chat?.account?.id, 'blocked_by']));
-  const isBlocking = useAppSelector((state) => state.getIn(['relationships', chat?.account?.id, 'blocking']));
+  const isBlocked = useAppSelector((state) => state.relationships.getIn([chat?.account?.id, 'blocked_by']));
+  const isBlocking = useAppSelector((state) => state.relationships.getIn([chat?.account?.id, 'blocking']));
   const maxCharacterCount = useAppSelector((state) => state.instance.configuration.chats.max_characters);
   const attachmentLimit = useAppSelector(state => state.instance.configuration.chats.max_media_attachments);
 
diff --git a/src/features/chats/components/chat-list-item.tsx b/src/features/chats/components/chat-list-item.tsx
index 3988cca46..97a27bc60 100644
--- a/src/features/chats/components/chat-list-item.tsx
+++ b/src/features/chats/components/chat-list-item.tsx
@@ -35,8 +35,8 @@ const ChatListItem: React.FC<IChatListItemInterface> = ({ chat, onClick }) => {
 
   const { isUsingMainChatPage } = useChatContext();
   const { deleteChat } = useChatActions(chat?.id as string);
-  const isBlocked = useAppSelector((state) => state.getIn(['relationships', chat.account.id, 'blocked_by']));
-  const isBlocking = useAppSelector((state) => state.getIn(['relationships', chat?.account?.id, 'blocking']));
+  const isBlocked = useAppSelector((state) => state.relationships.getIn([chat.account.id, 'blocked_by']));
+  const isBlocking = useAppSelector((state) => state.relationships.getIn([chat?.account?.id, 'blocking']));
 
   const menu = useMemo((): Menu => [{
     text: intl.formatMessage(messages.leaveChat),
diff --git a/src/features/chats/components/chat-message-list.test.tsx b/src/features/chats/components/chat-message-list.test.tsx
index 23c522e81..7ea47173b 100644
--- a/src/features/chats/components/chat-message-list.test.tsx
+++ b/src/features/chats/components/chat-message-list.test.tsx
@@ -68,9 +68,11 @@ Object.assign(navigator, {
   },
 });
 
-const store = rootState
-  .set('me', '1')
-  .set('instance', buildInstance({ version: '3.4.1 (compatible; TruthSocial 1.0.0+unreleased)' }));
+const store = {
+  ...rootState,
+  me: '1',
+  instance: buildInstance({ version: '3.4.1 (compatible; TruthSocial 1.0.0+unreleased)' }),
+};
 
 const renderComponentWithChatContext = () => render(
   <VirtuosoMockContext.Provider value={{ viewportHeight: 300, itemHeight: 100 }}>
diff --git a/src/features/chats/components/chat-message-list.tsx b/src/features/chats/components/chat-message-list.tsx
index 0d8272cd0..cce1feff4 100644
--- a/src/features/chats/components/chat-message-list.tsx
+++ b/src/features/chats/components/chat-message-list.tsx
@@ -91,7 +91,7 @@ const ChatMessageList: React.FC<IChatMessageList> = ({ chat }) => {
 
   const formattedChatMessages = chatMessages || [];
 
-  const isBlocked = useAppSelector((state) => state.getIn(['relationships', chat.account.id, 'blocked_by']));
+  const isBlocked = useAppSelector((state) => state.relationships.getIn([chat.account.id, 'blocked_by']));
 
   const lastChatMessage = chatMessages ? chatMessages[chatMessages.length - 1] : null;
 
diff --git a/src/features/chats/components/chat-page/components/chat-page-main.tsx b/src/features/chats/components/chat-page/components/chat-page-main.tsx
index 15178e0c7..860d2a1c9 100644
--- a/src/features/chats/components/chat-page/components/chat-page-main.tsx
+++ b/src/features/chats/components/chat-page/components/chat-page-main.tsx
@@ -60,7 +60,7 @@ const ChatPageMain = () => {
 
   const handleUpdateChat = (value: MessageExpirationValues) => updateChat.mutate({ message_expiration: value });
 
-  const isBlocking = useAppSelector((state) => state.getIn(['relationships', chat?.account?.id, 'blocking']));
+  const isBlocking = useAppSelector((state) => state.relationships.getIn([chat?.account?.id, 'blocking']));
 
   const handleBlockUser = () => {
     dispatch(openModal('CONFIRM', {
diff --git a/src/features/chats/components/chat-widget.test.tsx b/src/features/chats/components/chat-widget.test.tsx
index a183be076..933a2a570 100644
--- a/src/features/chats/components/chat-widget.test.tsx
+++ b/src/features/chats/components/chat-widget.test.tsx
@@ -17,16 +17,18 @@ const account = buildAccount({
   },
 });
 
-const store = rootState
-  .set('me', id)
-  .set('entities', {
+const store = {
+  ...rootState,
+  me: id,
+  entities: {
     'ACCOUNTS': {
       store: {
         [id]: account,
       },
       lists: {},
     },
-  });
+  },
+};
 
 describe('<ChatWidget />', () => {
   describe('when on the /chats endpoint', () => {
diff --git a/src/features/chats/components/chat-widget/chat-settings.tsx b/src/features/chats/components/chat-widget/chat-settings.tsx
index e1b1cabf6..3d383cf17 100644
--- a/src/features/chats/components/chat-widget/chat-settings.tsx
+++ b/src/features/chats/components/chat-widget/chat-settings.tsx
@@ -40,7 +40,7 @@ const ChatSettings = () => {
 
   const handleUpdateChat = (value: MessageExpirationValues) => updateChat.mutate({ message_expiration: value });
 
-  const isBlocking = useAppSelector((state) => state.getIn(['relationships', chat?.account?.id, 'blocking']));
+  const isBlocking = useAppSelector((state) => state.relationships.getIn([chat?.account?.id, 'blocking']));
 
   const closeSettings = () => {
     changeScreen(ChatWidgetScreens.CHAT, chat?.id);
diff --git a/src/queries/chats.test.ts b/src/queries/chats.test.ts
index 21a7ebd0d..003017b84 100644
--- a/src/queries/chats.test.ts
+++ b/src/queries/chats.test.ts
@@ -116,11 +116,11 @@ describe('useChatMessages', () => {
 
   describe('when the user is blocked', () => {
     beforeEach(() => {
-      const state = rootState
-        .set(
-          'relationships',
-          ImmutableMap({ '1': buildRelationship({ blocked_by: true }) }),
-        );
+      const state = {
+        ...rootState,
+        relationships: ImmutableMap({ '1': buildRelationship({ blocked_by: true }) }),
+      };
+
       store = mockStore(state);
     });
 
diff --git a/src/queries/chats.ts b/src/queries/chats.ts
index 8bf382900..01d67987f 100644
--- a/src/queries/chats.ts
+++ b/src/queries/chats.ts
@@ -79,7 +79,7 @@ const isLastMessage = (chatMessageId: string): boolean => {
 
 const useChatMessages = (chat: IChat) => {
   const api = useApi();
-  const isBlocked = useAppSelector((state) => state.getIn(['relationships', chat.account.id, 'blocked_by']));
+  const isBlocked = useAppSelector((state) => state.relationships.getIn([chat.account.id, 'blocked_by']));
 
   const getChatMessages = async (chatId: string, pageParam?: any): Promise<PaginatedResult<ChatMessage>> => {
     const nextPageLink = pageParam?.link;
diff --git a/src/reducers/index.ts b/src/reducers/index.ts
index a5d45c95f..a6df8e026 100644
--- a/src/reducers/index.ts
+++ b/src/reducers/index.ts
@@ -1,5 +1,4 @@
-import { Record as ImmutableRecord } from 'immutable';
-import { combineReducers } from 'redux-immutable';
+import { combineReducers } from '@reduxjs/toolkit';
 
 import { AUTH_LOGGED_OUT } from 'soapbox/actions/auth';
 import * as BuildConfig from 'soapbox/build-config';
@@ -120,39 +119,29 @@ const reducers = {
   user_lists,
 };
 
-// Build a default state from all reducers: it has the key and `undefined`
-export const StateRecord = ImmutableRecord(
-  Object.keys(reducers).reduce((params: Record<string, any>, reducer) => {
-    params[reducer] = undefined;
-    return params;
-  }, {}),
-);
+const appReducer = combineReducers(reducers);
 
-const appReducer = combineReducers(reducers, StateRecord);
+type AppState = ReturnType<typeof appReducer>;
 
 // Clear the state (mostly) when the user logs out
-const logOut = (state: any = StateRecord()): ReturnType<typeof appReducer> => {
+const logOut = (state: AppState): ReturnType<typeof appReducer> => {
   if (BuildConfig.NODE_ENV === 'production') {
     location.href = '/login';
   }
 
-  const whitelist: string[] = ['instance', 'soapbox', 'custom_emojis', 'auth'];
+  const newState = rootReducer(undefined, { type: '' });
 
-  return StateRecord(
-    whitelist.reduce((acc: Record<string, any>, curr) => {
-      acc[curr] = state.get(curr);
-      return acc;
-    }, {}),
-  ) as unknown as ReturnType<typeof appReducer>;
+  const { instance, soapbox, custom_emojis, auth } = state;
+  return { ...newState, instance, soapbox, custom_emojis, auth };
 };
 
 const rootReducer: typeof appReducer = (state, action) => {
   switch (action.type) {
     case AUTH_LOGGED_OUT:
-      return appReducer(logOut(state), action);
+      return appReducer(logOut(state as AppState), action);
     default:
       return appReducer(state, action);
   }
 };
 
-export default rootReducer;
+export default appReducer;
diff --git a/types/redux-immutable/index.d.ts b/types/redux-immutable/index.d.ts
deleted file mode 100644
index fbaecd198..000000000
--- a/types/redux-immutable/index.d.ts
+++ /dev/null
@@ -1,17 +0,0 @@
-// Type definitions for redux-immutable v4.0.0
-// Project: https://github.com/gajus/redux-immutable
-// Definitions by: Sebastian Sebald <https://github.com/sebald>
-//                 Gavin Gregory <https://github.com/gavingregory>
-//                 Kanitkorn Sujautra <https://github.com/lukyth>
-// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-// TypeScript Version: 2.3
-
-declare module 'redux-immutable' {
-  import { Collection, Record } from 'immutable';
-  import { ReducersMapObject, Reducer, Action } from 'redux';
-
-  export function combineReducers<S, A extends Action, T>(reducers: ReducersMapObject<S, A>, getDefaultState?: () => Collection.Keyed<T, S>): Reducer<S, A>;
-  export function combineReducers<S, A extends Action>(reducers: ReducersMapObject<S, A>, getDefaultState?: () => Collection.Indexed<S>): Reducer<S, A>;
-  export function combineReducers<S>(reducers: ReducersMapObject<S, any>, getDefaultState?: () => Collection.Indexed<S>): Reducer<S>;
-  export function combineReducers<S extends object, T extends object>(reducers: ReducersMapObject<S, any>, getDefaultState?: Record.Factory<T>): Reducer<ReturnType<Record.Factory<S>>>;
-}
diff --git a/yarn.lock b/yarn.lock
index e59e33255..92c73e699 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7443,11 +7443,6 @@ redent@^3.0.0:
     indent-string "^4.0.0"
     strip-indent "^3.0.0"
 
-redux-immutable@^4.0.0:
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/redux-immutable/-/redux-immutable-4.0.0.tgz#3a1a32df66366462b63691f0e1dc35e472bbc9f3"
-  integrity sha1-Ohoy32Y2ZGK2NpHw4dw15HK7yfM=
-
 redux-thunk@^3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/redux-thunk/-/redux-thunk-3.1.0.tgz#94aa6e04977c30e14e892eae84978c1af6058ff3"