diff --git a/typings/index.d.ts b/typings/index.d.ts
index 8e7a26244..7a5377b30 100644
--- a/typings/index.d.ts
+++ b/typings/index.d.ts
@@ -2406,7 +2406,7 @@ declare module 'discord.js' {
     ): Promise<ApplicationCommandType>;
     public fetch(
       id: Snowflake,
-      options: FetchApplicationCommandOptions & { guild: GuildResolvable },
+      options: FetchApplicationCommandOptions & { guildID: Snowflake },
     ): Promise<ApplicationCommand>;
     public fetch(id: Snowflake, options?: FetchApplicationCommandOptions): Promise<ApplicationCommandType>;
     public fetch(
@@ -2432,27 +2432,24 @@ declare module 'discord.js' {
     public guildID: Snowflake | null;
     public manager: ApplicationCommandManager | GuildApplicationCommandManager | ApplicationCommand;
     public add(
-      options: BaseOptions & { permissions: ApplicationCommandPermissionData[] },
+      options: FetchSingleOptions & { permissions: ApplicationCommandPermissionData[] },
     ): Promise<ApplicationCommandPermissions[]>;
-    public has(options: BaseOptions & { permissionsID: UserResolvable | RoleResolvable }): Promise<boolean>;
+    public has(options: FetchSingleOptions & { permissionsID: UserResolvable | RoleResolvable }): Promise<boolean>;
     public fetch(options: FetchSingleOptions): Promise<ApplicationCommandPermissions[]>;
     public fetch(options: BaseOptions): Promise<Collection<Snowflake, ApplicationCommandPermissions[]>>;
     public remove(
       options:
-        | (BaseOptions & {
+        | (FetchSingleOptions & {
             users: UserResolvable | UserResolvable[];
             roles?: RoleResolvable | RoleResolvable[];
           })
-        | (BaseOptions & {
+        | (FetchSingleOptions & {
             users?: UserResolvable | UserResolvable[];
             roles: RoleResolvable | RoleResolvable[];
           }),
     ): Promise<ApplicationCommandPermissions[]>;
     public set(
-      options: BaseOptions & {
-        command: ApplicationCommandResolvable;
-        permissions: ApplicationCommandPermissionData[];
-      },
+      options: FetchSingleOptions & { permissions: ApplicationCommandPermissionData[] },
     ): Promise<ApplicationCommandPermissions[]>;
     public set(
       options: BaseOptions & {
@@ -2481,16 +2478,7 @@ declare module 'discord.js' {
     public edit(command: ApplicationCommandResolvable, data: ApplicationCommandData): Promise<ApplicationCommand>;
     public fetch(id: Snowflake, options?: BaseFetchOptions): Promise<ApplicationCommand>;
     public fetch(id?: Snowflake, options?: BaseFetchOptions): Promise<Collection<Snowflake, ApplicationCommand>>;
-    public fetchPermissions(): Promise<Collection<Snowflake, ApplicationCommandPermissions[]>>;
-    public fetchPermissions(command: ApplicationCommandResolvable): Promise<ApplicationCommandPermissions[]>;
     public set(commands: ApplicationCommandData[]): Promise<Collection<Snowflake, ApplicationCommand>>;
-    public setPermissions(
-      command: ApplicationCommandResolvable,
-      permissions: ApplicationCommandPermissionData[],
-    ): Promise<ApplicationCommandPermissions[]>;
-    public setPermissions(
-      permissions: GuildApplicationCommandPermissionData[],
-    ): Promise<Collection<Snowflake, ApplicationCommandPermissions[]>>;
   }
 
   export class GuildChannelManager extends BaseManager<
diff --git a/typings/index.ts b/typings/index.ts
index 1934d54f3..cf71854b8 100644
--- a/typings/index.ts
+++ b/typings/index.ts
@@ -17,8 +17,330 @@ const client: Client = new Client({
   intents: Intents.NON_PRIVILEGED,
 });
 
-client.on('ready', () => {
+const testGuildID = '222078108977594368'; // DJS
+const testUserID = '987654321098765432'; // example ID
+const globalCommandID = '123456789012345678'; // example ID
+const guildCommandID = '234567890123456789'; // example ID
+
+client.on('ready', async () => {
   console.log(`Client is logged in as ${client.user!.tag} and ready!`);
+
+  // Test command manager methods
+  const globalCommand = await client.application?.commands.fetch(globalCommandID);
+  const guildCommandFromGlobal = await client.application?.commands.fetch(guildCommandID, { guildID: testGuildID });
+  const guildCommandFromGuild = await client.guilds.cache.get(testGuildID)?.commands.fetch(guildCommandID);
+
+  // @ts-expect-error
+  await client.guilds.cache.get(testGuildID)?.commands.fetch(guildCommandID, { guildID: testGuildID });
+
+  // Test command permissions
+  const globalPermissionsManager = client.application?.commands.permissions;
+  const guildPermissionsManager = client.guilds.cache.get(testGuildID)?.commands.permissions;
+  const originalPermissions = await client.application?.commands.permissions.fetch({ guild: testGuildID });
+
+  // Permissions from global manager
+  await globalPermissionsManager?.add({
+    command: globalCommandID,
+    guild: testGuildID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+  await globalPermissionsManager?.has({ command: globalCommandID, guild: testGuildID, permissionsID: testGuildID });
+  await globalPermissionsManager?.fetch({ guild: testGuildID });
+  await globalPermissionsManager?.fetch({ command: globalCommandID, guild: testGuildID });
+  await globalPermissionsManager?.remove({ command: globalCommandID, guild: testGuildID, roles: [testGuildID] });
+  await globalPermissionsManager?.remove({ command: globalCommandID, guild: testGuildID, users: [testUserID] });
+  await globalPermissionsManager?.remove({
+    command: globalCommandID,
+    guild: testGuildID,
+    roles: [testGuildID],
+    users: [testUserID],
+  });
+  await globalPermissionsManager?.set({
+    command: globalCommandID,
+    guild: testGuildID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+  await globalPermissionsManager?.set({
+    guild: testGuildID,
+    fullPermissions: [{ id: globalCommandID, permissions: [{ type: 'ROLE', id: testGuildID, permission: true }] }],
+  });
+
+  // @ts-expect-error
+  await globalPermissionsManager?.add({
+    command: globalCommandID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+  // @ts-expect-error
+  await globalPermissionsManager?.has({ command: globalCommandID, permissionsID: testGuildID });
+  // @ts-expect-error
+  await globalPermissionsManager?.fetch();
+  // @ts-expect-error
+  await globalPermissionsManager?.fetch({ command: globalCommandID });
+  // @ts-expect-error
+  await globalPermissionsManager?.remove({ command: globalCommandID, roles: [testGuildID] });
+  // @ts-expect-error
+  await globalPermissionsManager?.remove({ command: globalCommandID, users: [testUserID] });
+  // @ts-expect-error
+  await globalPermissionsManager?.remove({ command: globalCommandID, roles: [testGuildID], users: [testUserID] });
+  // @ts-expect-error
+  await globalPermissionsManager?.set({
+    command: globalCommandID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+  // @ts-expect-error
+  await globalPermissionsManager?.set({
+    fullPermissions: [{ id: globalCommandID, permissions: [{ type: 'ROLE', id: testGuildID, permission: true }] }],
+  });
+
+  // @ts-expect-error
+  await globalPermissionsManager?.add({
+    guild: testGuildID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+  // @ts-expect-error
+  await globalPermissionsManager?.has({ guild: testGuildID, permissionsID: testGuildID });
+  // @ts-expect-error
+  await globalPermissionsManager?.remove({ guild: testGuildID, roles: [testGuildID] });
+  // @ts-expect-error
+  await globalPermissionsManager?.remove({ guild: testGuildID, users: [testUserID] });
+  // @ts-expect-error
+  await globalPermissionsManager?.remove({ guild: testGuildID, roles: [testGuildID], users: [testUserID] });
+  // @ts-expect-error
+  await globalPermissionsManager?.set({
+    guild: testGuildID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+
+  // Permissions from guild manager
+  await guildPermissionsManager?.add({
+    command: globalCommandID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+  await guildPermissionsManager?.has({ command: globalCommandID, permissionsID: testGuildID });
+  await guildPermissionsManager?.fetch({});
+  await guildPermissionsManager?.fetch({ command: globalCommandID });
+  await guildPermissionsManager?.remove({ command: globalCommandID, roles: [testGuildID] });
+  await guildPermissionsManager?.remove({ command: globalCommandID, users: [testUserID] });
+  await guildPermissionsManager?.remove({ command: globalCommandID, roles: [testGuildID], users: [testUserID] });
+  await guildPermissionsManager?.set({
+    command: globalCommandID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+  await guildPermissionsManager?.set({
+    fullPermissions: [{ id: globalCommandID, permissions: [{ type: 'ROLE', id: testGuildID, permission: true }] }],
+  });
+
+  await guildPermissionsManager?.add({
+    command: globalCommandID,
+    // @ts-expect-error
+    guild: testGuildID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+  // @ts-expect-error
+  await guildPermissionsManager?.has({ command: globalCommandID, guild: testGuildID, permissionsID: testGuildID });
+  // @ts-expect-error
+  await guildPermissionsManager?.fetch({ guild: testGuildID });
+  // @ts-expect-error
+  await guildPermissionsManager?.fetch({ command: globalCommandID, guild: testGuildID });
+  // @ts-expect-error
+  await guildPermissionsManager?.remove({ command: globalCommandID, guild: testGuildID, roles: [testGuildID] });
+  // @ts-expect-error
+  await guildPermissionsManager?.remove({ command: globalCommandID, guild: testGuildID, users: [testUserID] });
+  await guildPermissionsManager?.remove({
+    command: globalCommandID,
+    // @ts-expect-error
+    guild: testGuildID,
+    roles: [testGuildID],
+    users: [testUserID],
+  });
+  await guildPermissionsManager?.set({
+    command: globalCommandID,
+    // @ts-expect-error
+    guild: testGuildID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+  await guildPermissionsManager?.set({
+    // @ts-expect-error
+    guild: testGuildID,
+    fullPermissions: [{ id: globalCommandID, permissions: [{ type: 'ROLE', id: testGuildID, permission: true }] }],
+  });
+
+  // @ts-expect-error
+  await guildPermissionsManager?.add({ permissions: [{ type: 'ROLE', id: testGuildID, permission: true }] });
+  // @ts-expect-error
+  await guildPermissionsManager?.has({ permissionsID: testGuildID });
+  // @ts-expect-error
+  await guildPermissionsManager?.remove({ roles: [testGuildID] });
+  // @ts-expect-error
+  await guildPermissionsManager?.remove({ users: [testUserID] });
+  // @ts-expect-error
+  await guildPermissionsManager?.remove({ roles: [testGuildID], users: [testUserID] });
+  // @ts-expect-error
+  await guildPermissionsManager?.set({ permissions: [{ type: 'ROLE', id: testGuildID, permission: true }] });
+
+  // Permissions from cached global ApplicationCommand
+  await globalCommand?.permissions.add({
+    guild: testGuildID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+  await globalCommand?.permissions.has({ guild: testGuildID, permissionsID: testGuildID });
+  await globalCommand?.permissions.fetch({ guild: testGuildID });
+  await globalCommand?.permissions.remove({ guild: testGuildID, roles: [testGuildID] });
+  await globalCommand?.permissions.remove({ guild: testGuildID, users: [testUserID] });
+  await globalCommand?.permissions.remove({ guild: testGuildID, roles: [testGuildID], users: [testUserID] });
+  await globalCommand?.permissions.set({
+    guild: testGuildID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+
+  await globalCommand?.permissions.add({
+    // @ts-expect-error
+    command: globalCommandID,
+    guild: testGuildID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+  // @ts-expect-error
+  await globalCommand?.permissions.has({ command: globalCommandID, guild: testGuildID, permissionsID: testGuildID });
+  // @ts-expect-error
+  await globalCommand?.permissions.fetch({ command: globalCommandID, guild: testGuildID });
+  // @ts-expect-error
+  await globalCommand?.permissions.remove({ command: globalCommandID, guild: testGuildID, roles: [testGuildID] });
+  // @ts-expect-error
+  await globalCommand?.permissions.remove({ command: globalCommandID, guild: testGuildID, users: [testUserID] });
+  await globalCommand?.permissions.remove({
+    // @ts-expect-error
+    command: globalCommandID,
+    guild: testGuildID,
+    roles: [testGuildID],
+    users: [testUserID],
+  });
+  await globalCommand?.permissions.set({
+    // @ts-expect-error
+    command: globalCommandID,
+    guild: testGuildID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+
+  // @ts-expect-error
+  await globalCommand?.permissions.add({ permissions: [{ type: 'ROLE', id: testGuildID, permission: true }] });
+  // @ts-expect-error
+  await globalCommand?.permissions.has({ permissionsID: testGuildID });
+  // @ts-expect-error
+  await globalCommand?.permissions.fetch({});
+  // @ts-expect-error
+  await globalCommand?.permissions.remove({ roles: [testGuildID] });
+  // @ts-expect-error
+  await globalCommand?.permissions.remove({ users: [testUserID] });
+  // @ts-expect-error
+  await globalCommand?.permissions.remove({ roles: [testGuildID], users: [testUserID] });
+  // @ts-expect-error
+  await globalCommand?.permissions.set({ permissions: [{ type: 'ROLE', id: testGuildID, permission: true }] });
+
+  // Permissions from cached guild ApplicationCommand
+  await guildCommandFromGlobal?.permissions.add({ permissions: [{ type: 'ROLE', id: testGuildID, permission: true }] });
+  await guildCommandFromGlobal?.permissions.has({ permissionsID: testGuildID });
+  await guildCommandFromGlobal?.permissions.fetch({});
+  await guildCommandFromGlobal?.permissions.remove({ roles: [testGuildID] });
+  await guildCommandFromGlobal?.permissions.remove({ users: [testUserID] });
+  await guildCommandFromGlobal?.permissions.remove({ roles: [testGuildID], users: [testUserID] });
+  await guildCommandFromGlobal?.permissions.set({ permissions: [{ type: 'ROLE', id: testGuildID, permission: true }] });
+
+  await guildCommandFromGlobal?.permissions.add({
+    // @ts-expect-error
+    command: globalCommandID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+  // @ts-expect-error
+  await guildCommandFromGlobal?.permissions.has({ command: guildCommandID, permissionsID: testGuildID });
+  // @ts-expect-error
+  await guildCommandFromGlobal?.permissions.remove({ command: guildCommandID, roles: [testGuildID] });
+  // @ts-expect-error
+  await guildCommandFromGlobal?.permissions.remove({ command: guildCommandID, users: [testUserID] });
+  await guildCommandFromGlobal?.permissions.remove({
+    // @ts-expect-error
+    command: guildCommandID,
+    roles: [testGuildID],
+    users: [testUserID],
+  });
+  await guildCommandFromGlobal?.permissions.set({
+    // @ts-expect-error
+    command: guildCommandID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+
+  await guildCommandFromGlobal?.permissions.add({
+    // @ts-expect-error
+    guild: testGuildID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+  // @ts-expect-error
+  await guildCommandFromGlobal?.permissions.has({ guild: testGuildID, permissionsID: testGuildID });
+  // @ts-expect-error
+  await guildCommandFromGlobal?.permissions.remove({ guild: testGuildID, roles: [testGuildID] });
+  // @ts-expect-error
+  await guildCommandFromGlobal?.permissions.remove({ guild: testGuildID, users: [testUserID] });
+  // @ts-expect-error
+  await guildCommandFromGlobal?.permissions.remove({ guild: testGuildID, roles: [testGuildID], users: [testUserID] });
+  await guildCommandFromGlobal?.permissions.set({
+    // @ts-expect-error
+    guild: testGuildID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+
+  await guildCommandFromGuild?.permissions.add({ permissions: [{ type: 'ROLE', id: testGuildID, permission: true }] });
+  await guildCommandFromGuild?.permissions.has({ permissionsID: testGuildID });
+  await guildCommandFromGuild?.permissions.fetch({});
+  await guildCommandFromGuild?.permissions.remove({ roles: [testGuildID] });
+  await guildCommandFromGuild?.permissions.remove({ users: [testUserID] });
+  await guildCommandFromGuild?.permissions.remove({ roles: [testGuildID], users: [testUserID] });
+  await guildCommandFromGuild?.permissions.set({ permissions: [{ type: 'ROLE', id: testGuildID, permission: true }] });
+
+  await guildCommandFromGuild?.permissions.add({
+    // @ts-expect-error
+    command: globalCommandID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+  // @ts-expect-error
+  await guildCommandFromGuild?.permissions.has({ command: guildCommandID, permissionsID: testGuildID });
+  // @ts-expect-error
+  await guildCommandFromGuild?.permissions.remove({ command: guildCommandID, roles: [testGuildID] });
+  // @ts-expect-error
+  await guildCommandFromGuild?.permissions.remove({ command: guildCommandID, users: [testUserID] });
+  await guildCommandFromGuild?.permissions.remove({
+    // @ts-expect-error
+    command: guildCommandID,
+    roles: [testGuildID],
+    users: [testUserID],
+  });
+  await guildCommandFromGuild?.permissions.set({
+    // @ts-expect-error
+    command: guildCommandID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+
+  await guildCommandFromGuild?.permissions.add({
+    // @ts-expect-error
+    guild: testGuildID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+  // @ts-expect-error
+  await guildCommandFromGuild?.permissions.has({ guild: testGuildID, permissionsID: testGuildID });
+  // @ts-expect-error
+  await guildCommandFromGuild?.permissions.remove({ guild: testGuildID, roles: [testGuildID] });
+  // @ts-expect-error
+  await guildCommandFromGuild?.permissions.remove({ guild: testGuildID, users: [testUserID] });
+  // @ts-expect-error
+  await guildCommandFromGuild?.permissions.remove({ guild: testGuildID, roles: [testGuildID], users: [testUserID] });
+  await guildCommandFromGuild?.permissions.set({
+    // @ts-expect-error
+    guild: testGuildID,
+    permissions: [{ type: 'ROLE', id: testGuildID, permission: true }],
+  });
+
+  client.application?.commands.permissions.set({
+    guild: testGuildID,
+    fullPermissions: originalPermissions?.map((permissions, id) => ({ permissions, id })) ?? [],
+  });
 });
 
 client.on('guildCreate', g => {