diff --git a/packages/web-api/src/types/helpers.ts b/packages/web-api/src/types/helpers.ts
index 60bd446b4..d49aefdfc 100644
--- a/packages/web-api/src/types/helpers.ts
+++ b/packages/web-api/src/types/helpers.ts
@@ -1,2 +1,4 @@
 /** Omit all keys K from possible union types T */
 export type ExcludeFromUnion<T, K extends string> = T extends T ? Omit<T, K> : never;
+/** Allows to explicitly declare a function parameter as optional */
+export type OptionalArgument<T> = T | void;
diff --git a/packages/web-api/src/types/request/admin/apps.ts b/packages/web-api/src/types/request/admin/apps.ts
index c8ca8dc59..1f8c9366b 100644
--- a/packages/web-api/src/types/request/admin/apps.ts
+++ b/packages/web-api/src/types/request/admin/apps.ts
@@ -1,4 +1,5 @@
 import type { AppID, CursorPaginationEnabled, TokenOverridable } from '../common';
+import { OptionalArgument } from '../../helpers';
 
 interface RequestID {
   /** @description The id of the request. */
@@ -24,8 +25,8 @@ interface Certified {
 }
 
 // https://api.slack.com/methods/admin.apps.activities.list
-export interface AdminAppsActivitiesListArguments extends Partial<AppID>, Partial<TeamID>, TokenOverridable,
-  CursorPaginationEnabled {
+export type AdminAppsActivitiesListArguments = OptionalArgument<Partial<AppID> & Partial<TeamID> & TokenOverridable &
+CursorPaginationEnabled & {
   /**
    * @description The component ID of log events to be returned. Will be `FnXXXXXX` for functions,
    * and `WfXXXXXX` for worflows.
@@ -47,7 +48,7 @@ export interface AdminAppsActivitiesListArguments extends Partial<AppID>, Partia
   source?: 'slack' | 'developer';
   /** @description The trace ID of log events to be returned. */
   trace_id?: string;
-}
+}>;
 
 // https://api.slack.com/methods/admin.apps.approve
 export type AdminAppsApproveArguments = AppOrRequestID & TeamOrEnterpriseID & TokenOverridable;
diff --git a/packages/web-api/src/types/request/admin/barriers.ts b/packages/web-api/src/types/request/admin/barriers.ts
index 6b4b21cd3..6990e1037 100644
--- a/packages/web-api/src/types/request/admin/barriers.ts
+++ b/packages/web-api/src/types/request/admin/barriers.ts
@@ -1,4 +1,5 @@
 import type { CursorPaginationEnabled, TokenOverridable } from '../common';
+import { OptionalArgument } from '../../helpers';
 
 interface BarrierID {
   /** @description The ID of the barrier. */
@@ -22,7 +23,7 @@ export interface AdminBarriersCreateArguments extends TokenOverridable {
 export interface AdminBarriersDeleteArguments extends BarrierID, TokenOverridable {}
 
 // https://api.slack.com/methods/admin.barriers.list
-export interface AdminBarriersListArguments extends TokenOverridable, CursorPaginationEnabled { }
+export type AdminBarriersListArguments = OptionalArgument<TokenOverridable & CursorPaginationEnabled>;
 
 // https://api.slack.com/methods/admin.barriers.update
 export interface AdminBarriersUpdateArguments extends AdminBarriersCreateArguments, BarrierID {}
diff --git a/packages/web-api/src/types/request/admin/conversations.ts b/packages/web-api/src/types/request/admin/conversations.ts
index 8da69260d..ad605f68c 100644
--- a/packages/web-api/src/types/request/admin/conversations.ts
+++ b/packages/web-api/src/types/request/admin/conversations.ts
@@ -5,6 +5,7 @@ import type {
   TokenOverridable,
   UserIDs,
 } from '../common';
+import { OptionalArgument } from '../../helpers';
 
 interface ChannelID { // an identical interface exists in src/types/request/conversations.ts, but it is only for invites
   /** @description Encoded channel ID. */
@@ -95,11 +96,11 @@ export interface AdminConversationsDisconnectSharedArguments extends ChannelID,
 }
 
 // https://api.slack.com/methods/admin.conversations.ekm.listOriginalConnectedChannelInfo
-export interface AdminConversationsEKMListOriginalConnectedChannelInfoArguments
-  extends Partial<TeamIDs>, TokenOverridable, CursorPaginationEnabled {
+export type AdminConversationsEKMListOriginalConnectedChannelInfoArguments = OptionalArgument<Partial<TeamIDs> &
+TokenOverridable & CursorPaginationEnabled & {
   /** @description A comma-separated list of channels to filter to. */
   channel_ids?: string[];
-}
+}>;
 
 // https://api.slack.com/methods/admin.conversations.getConversationPrefs
 export interface AdminConversationsGetConversationPrefsArguments extends ChannelID, TokenOverridable {}
@@ -148,8 +149,8 @@ export interface AdminConversationsRestrictAccessRemoveGroupArguments extends Ch
   RestrictAccessTeamID, TokenOverridable {}
 
 // https://api.slack.com/methods/admin.conversations.search
-export interface AdminConversationsSearchArguments
-  extends SortDir, Partial<TeamIDs>, TokenOverridable, CursorPaginationEnabled {
+export type AdminConversationsSearchArguments = OptionalArgument<SortDir & Partial<TeamIDs> & TokenOverridable &
+CursorPaginationEnabled & {
   /** @description Array of encoded team IDs, signifying the external orgs to search through. */
   connected_team_ids?: string[];
   /** @description Name of the channel to query by. */
@@ -175,7 +176,7 @@ export interface AdminConversationsSearchArguments
    * Omits channel data and allows access for admins without channel manager permissions. Defaults to `false`.
    */
   total_count_only?: boolean;
-}
+}>;
 
 // https://api.slack.com/methods/admin.conversations.setConversationPrefs
 export interface AdminConversationsSetConversationPrefsArguments extends ChannelID, TokenOverridable {
diff --git a/packages/web-api/src/types/request/admin/emoji.ts b/packages/web-api/src/types/request/admin/emoji.ts
index c2cecd873..79088ae2e 100644
--- a/packages/web-api/src/types/request/admin/emoji.ts
+++ b/packages/web-api/src/types/request/admin/emoji.ts
@@ -1,4 +1,5 @@
 import type { CursorPaginationEnabled, TokenOverridable } from '../common';
+import { OptionalArgument } from '../../helpers';
 
 interface Name {
   /**
@@ -27,7 +28,7 @@ export interface AdminEmojiAddAliasArguments extends Name, TokenOverridable {
 }
 
 // https://api.slack.com/methods/admin.emoji.list
-export interface AdminEmojiListArguments extends TokenOverridable, CursorPaginationEnabled {}
+export type AdminEmojiListArguments = OptionalArgument<TokenOverridable & CursorPaginationEnabled>;
 
 // https://api.slack.com/methods/admin.emoji.remove
 export interface AdminEmojiRemoveArguments extends Name, TokenOverridable {}
diff --git a/packages/web-api/src/types/request/admin/roles.ts b/packages/web-api/src/types/request/admin/roles.ts
index 5b53b7b57..7ddb552b9 100644
--- a/packages/web-api/src/types/request/admin/roles.ts
+++ b/packages/web-api/src/types/request/admin/roles.ts
@@ -1,4 +1,5 @@
 import type { CursorPaginationEnabled, SortDir, TokenOverridable, UserIDs } from '../common';
+import { OptionalArgument } from '../../helpers';
 
 interface EntityIDs {
   /**
@@ -20,14 +21,14 @@ interface RoleID {
 export interface AdminRolesAddAssignmentsArguments extends EntityIDs, RoleID, UserIDs, TokenOverridable {}
 
 // https://api.slack.com/methods/admin.roles.listAssignments
-export interface AdminRolesListAssignmentsArguments extends Partial<EntityIDs>, TokenOverridable,
-  CursorPaginationEnabled, SortDir {
+export type AdminRolesListAssignmentsArguments = OptionalArgument<Partial<EntityIDs> & TokenOverridable &
+CursorPaginationEnabled & SortDir & {
   /**
    * @description Collection of role ids to scope results by.
    * @see {@link https://api.slack.com/methods/admin.roles.addAssignments#markdown Admin Roles under Usage info}.
    */
   role_ids?: string[];
-}
+}>;
 
 // https://api.slack.com/methods/admin.roles.removeAssignments
 export interface AdminRolesRemoveAssignmentsArguments extends EntityIDs, RoleID, UserIDs, TokenOverridable {}
diff --git a/packages/web-api/src/types/request/admin/teams.ts b/packages/web-api/src/types/request/admin/teams.ts
index 6cdd3b8b9..77740c617 100644
--- a/packages/web-api/src/types/request/admin/teams.ts
+++ b/packages/web-api/src/types/request/admin/teams.ts
@@ -1,4 +1,5 @@
 import type { ChannelIDs, CursorPaginationEnabled, TeamID, TokenOverridable } from '../common';
+import { OptionalArgument } from '../../helpers';
 
 type TeamDiscoverability = 'open' | 'closed' | 'invite_only' | 'unlisted';
 
@@ -18,7 +19,7 @@ export interface AdminTeamsCreateArguments extends TokenOverridable {
 }
 
 // https://api.slack.com/methods/admin.teams.list
-export interface AdminTeamsListArguments extends TokenOverridable, CursorPaginationEnabled {}
+export type AdminTeamsListArguments = OptionalArgument<TokenOverridable & CursorPaginationEnabled>;
 
 // https://api.slack.com/methods/admin.teams.owners.list
 export interface AdminTeamsOwnersListArguments extends TeamID, TokenOverridable, CursorPaginationEnabled {}
diff --git a/packages/web-api/src/types/request/admin/users.ts b/packages/web-api/src/types/request/admin/users.ts
index 4f8e0eaa5..ed8795703 100644
--- a/packages/web-api/src/types/request/admin/users.ts
+++ b/packages/web-api/src/types/request/admin/users.ts
@@ -6,6 +6,7 @@ import type {
   TokenOverridable,
   UserIDs,
 } from '../common';
+import { OptionalArgument } from '../../helpers';
 
 interface UserID {
   /** @description The ID of the user. */
@@ -83,13 +84,14 @@ export interface AdminUsersInviteArguments extends ChannelIDs, TeamID, IsRestric
 }
 
 // https://api.slack.com/methods/admin.users.list
-export type AdminUsersListArguments = TeamIDOrDeactivatedWorkspaces & TokenOverridable & CursorPaginationEnabled & {
+export type AdminUsersListArguments = OptionalArgument<TeamIDOrDeactivatedWorkspaces & TokenOverridable &
+CursorPaginationEnabled & {
   /**
    * @description If `true`, only active users will be returned. If `false`, only deactivated users will be returned.
    * Default is `true`.
    */
   is_active?: boolean;
-};
+}>;
 
 // https://api.slack.com/methods/admin.users.remove
 export interface AdminUsersRemoveArguments extends TeamID, UserID, TokenOverridable {}
@@ -107,7 +109,8 @@ export interface AdminUsersSessionInvalidateArguments extends TeamID, TokenOverr
 }
 
 // https://api.slack.com/methods/admin.users.session.list
-export type AdminUsersSessionListArguments = EitherTeamAndUserIDOrNeither & TokenOverridable & CursorPaginationEnabled;
+export type AdminUsersSessionListArguments = OptionalArgument<EitherTeamAndUserIDOrNeither & TokenOverridable &
+CursorPaginationEnabled>;
 
 // https://api.slack.com/methods/admin.users.session.reset
 export interface AdminUsersSessionResetArguments extends UserID, SessionExpirationTarget, TokenOverridable {}
diff --git a/packages/web-api/src/types/request/admin/workflows.ts b/packages/web-api/src/types/request/admin/workflows.ts
index c7cabb9c4..56fbe7ddf 100644
--- a/packages/web-api/src/types/request/admin/workflows.ts
+++ b/packages/web-api/src/types/request/admin/workflows.ts
@@ -1,4 +1,5 @@
 import type { AppID, CursorPaginationEnabled, SortDir, TokenOverridable } from '../common';
+import { OptionalArgument } from '../../helpers';
 
 interface CollaboratorIDs {
   /** @description Array of collaborators (encoded user IDs) - maximum of 50 items. */
@@ -26,8 +27,8 @@ export interface AdminWorkflowsPermissionsLookupArguments extends WorkflowIDs, T
 }
 
 // https://api.slack.com/methods/admin.workflows.search
-export interface AdminWorkflowsSearchArguments extends Partial<AppID>, Partial<CollaboratorIDs>, SortDir,
-  TokenOverridable, CursorPaginationEnabled {
+export type AdminWorkflowsSearchArguments = OptionalArgument<Partial<AppID> & Partial<CollaboratorIDs> & SortDir &
+TokenOverridable & CursorPaginationEnabled & {
   /** @description Only include workflows with no collaborators in the result; default is `false`. */
   no_collaborators?: boolean;
   /** @description Number of trigger IDs to fetch for each workflow; default is `0`. */
@@ -38,7 +39,7 @@ export interface AdminWorkflowsSearchArguments extends Partial<AppID>, Partial<C
   sort?: 'premium_runs';
   /** @description Source of workflow creation, either from `code` or `workflow_builder`. */
   source?: 'code' | 'workflow_builder';
-}
+}>;
 
 // https://api.slack.com/methods/admin.workflows.unpublish
 export interface AdminWorkflowsUnpublishArguments extends WorkflowIDs, TokenOverridable {}
diff --git a/packages/web-api/src/types/request/api.ts b/packages/web-api/src/types/request/api.ts
index 709e2f211..4405b1abc 100644
--- a/packages/web-api/src/types/request/api.ts
+++ b/packages/web-api/src/types/request/api.ts
@@ -1,5 +1,7 @@
 // https://api.slack.com/methods/api.test
-export interface APITestArguments {
+import { OptionalArgument } from '../helpers';
+
+export type APITestArguments = OptionalArgument<{
   /** @description Error response to return. */
   error?: string;
-}
+}>;
diff --git a/packages/web-api/src/types/request/apps.ts b/packages/web-api/src/types/request/apps.ts
index 2e8d80a55..227b8cb17 100644
--- a/packages/web-api/src/types/request/apps.ts
+++ b/packages/web-api/src/types/request/apps.ts
@@ -1,8 +1,9 @@
 import type { AppID, CursorPaginationEnabled, TokenOverridable, OAuthCredentials } from './common';
 import type { Manifest } from './manifest';
+import { OptionalArgument } from '../helpers';
 
 // https://api.slack.com/methods/apps.connections.open
-export interface AppsConnectionsOpenArguments { }
+export type AppsConnectionsOpenArguments = OptionalArgument<object>;
 
 // https://api.slack.com/methods/apps.event.authorizations.list
 export interface AppsEventAuthorizationsListArguments
diff --git a/packages/web-api/src/types/request/auth.ts b/packages/web-api/src/types/request/auth.ts
index 3da060665..04be8b86c 100644
--- a/packages/web-api/src/types/request/auth.ts
+++ b/packages/web-api/src/types/request/auth.ts
@@ -1,23 +1,24 @@
 import type { CursorPaginationEnabled, TokenOverridable } from './common';
+import { OptionalArgument } from '../helpers';
 
 // https://api.slack.com/methods/auth.revoke
-export interface AuthRevokeArguments extends TokenOverridable {
+export type AuthRevokeArguments = OptionalArgument<TokenOverridable & {
   /**
    * @description Setting this parameter to `true` triggers a testing mode where the specified token
    * will not actually be revoked.
    */
   test?: boolean;
-}
+}>;
 
 // https://api.slack.com/methods/auth.teams.list
-export interface AuthTeamsListArguments extends TokenOverridable, CursorPaginationEnabled {
+export type AuthTeamsListArguments = OptionalArgument<TokenOverridable & CursorPaginationEnabled & {
   /**
    * @description Whether to return icon paths for each workspace.
    * An icon path represents a URI pointing to the image signifying the workspace.
    * Defaults to `false`.
    */
   include_icon?: boolean;
-}
+}>;
 
 // https://api.slack.com/methods/auth.test
-export interface AuthTestArguments extends TokenOverridable { }
+export type AuthTestArguments = OptionalArgument<TokenOverridable>;
diff --git a/packages/web-api/src/types/request/bots.ts b/packages/web-api/src/types/request/bots.ts
index 84f58240d..77ee5e4e0 100644
--- a/packages/web-api/src/types/request/bots.ts
+++ b/packages/web-api/src/types/request/bots.ts
@@ -1,7 +1,8 @@
 import type { OptionalTeamAssignable, TokenOverridable } from './common';
+import { OptionalArgument } from '../helpers';
 
 // https://api.slack.com/methods/bots.info
-export interface BotsInfoArguments extends TokenOverridable, OptionalTeamAssignable {
+export type BotsInfoArguments = OptionalArgument<TokenOverridable & OptionalTeamAssignable & {
   /** @description Bot ID, which starts with 'B', to retrieve information about. */
   bot?: string;
-}
+}>;
diff --git a/packages/web-api/src/types/request/chat.ts b/packages/web-api/src/types/request/chat.ts
index 70e21624f..3ffda58ce 100644
--- a/packages/web-api/src/types/request/chat.ts
+++ b/packages/web-api/src/types/request/chat.ts
@@ -11,6 +11,7 @@ import type {
   TimelinePaginationEnabled,
   TokenOverridable,
 } from './common';
+import { OptionalArgument } from '../helpers';
 
 interface Channel {
   /** @description Channel ID for the message. */
@@ -178,8 +179,8 @@ export type ChatScheduleMessageArguments = TokenOverridable & MessageContents &
 } & ReplyInThread & Parse & LinkNames & AsUser & Metadata & Unfurls;
 
 // https://api.slack.com/methods/chat.scheduledMessages.list
-export interface ChatScheduledMessagesListArguments extends TokenOverridable, CursorPaginationEnabled,
-  OptionalTeamAssignable, Pick<TimelinePaginationEnabled, 'latest' | 'oldest'>, Partial<Channel> {}
+export type ChatScheduledMessagesListArguments = OptionalArgument<TokenOverridable & CursorPaginationEnabled &
+OptionalTeamAssignable & Pick<TimelinePaginationEnabled, 'latest' | 'oldest'> & Partial<Channel>>;
 
 interface SourceAndUnfurlID {
   /**
diff --git a/packages/web-api/src/types/request/conversations.ts b/packages/web-api/src/types/request/conversations.ts
index 14892fdd3..22de1f1d3 100644
--- a/packages/web-api/src/types/request/conversations.ts
+++ b/packages/web-api/src/types/request/conversations.ts
@@ -5,6 +5,7 @@ import type {
   TimelinePaginationEnabled,
   TokenOverridable,
 } from './common';
+import { OptionalArgument } from '../helpers';
 
 interface Channel {
   /** @description ID of conversation. */
@@ -115,7 +116,8 @@ export interface ConversationsKickArguments extends Channel, TokenOverridable {
 export interface ConversationsLeaveArguments extends Channel, TokenOverridable {}
 
 // https://api.slack.com/methods/conversations.list
-export interface ConversationsListArguments extends TokenOverridable, CursorPaginationEnabled, OptionalTeamAssignable {
+export type ConversationsListArguments = OptionalArgument<TokenOverridable & CursorPaginationEnabled &
+OptionalTeamAssignable & {
   /** @description Set to `true` to exclude archived channels from the list. Defaults to `false`. */
   exclude_archived?: boolean;
   /**
@@ -123,15 +125,15 @@ export interface ConversationsListArguments extends TokenOverridable, CursorPagi
    * `public_channel`, `private_channel`, `mpim` or `im`. Defaults to `public_channel`.
    */
   types?: string;
-}
+}>;
 
 // https://api.slack.com/methods/conversations.listConnectInvites
-export interface ConversationsListConnectInvitesArguments extends TokenOverridable, OptionalTeamAssignable {
+export type ConversationsListConnectInvitesArguments = OptionalArgument<TokenOverridable & OptionalTeamAssignable & {
   /** @description Maximum number of invites to return. Defaults to `100`. */
   count?: number;
   /** @description Set to `next_cursor` returned by previous call to list items in subsequent page. */
   cursor?: string;
-}
+}>;
 
 // https://api.slack.com/methods/conversations.mark
 export interface ConversationsMarkArguments extends Message, TokenOverridable { }
diff --git a/packages/web-api/src/types/request/dnd.ts b/packages/web-api/src/types/request/dnd.ts
index 81f66ebc9..a530f7167 100644
--- a/packages/web-api/src/types/request/dnd.ts
+++ b/packages/web-api/src/types/request/dnd.ts
@@ -1,14 +1,15 @@
 import { OptionalTeamAssignable, TokenOverridable } from './common';
+import { OptionalArgument } from '../helpers';
 
 // https://api.slack.com/methods/dnd.endDnd
-export interface DndEndDndArguments extends TokenOverridable { }
+export type DndEndDndArguments = OptionalArgument<TokenOverridable>;
 // https://api.slack.com/methods/dnd.endSnooze
-export interface DndEndSnoozeArguments extends TokenOverridable { }
+export type DndEndSnoozeArguments = OptionalArgument<TokenOverridable>;
 // https://api.slack.com/methods/dnd.info
-export interface DndInfoArguments extends TokenOverridable, OptionalTeamAssignable {
+export type DndInfoArguments = OptionalArgument<TokenOverridable & OptionalTeamAssignable & {
   /** @description User to fetch status for (defaults to authed user). */
   user?: string;
-}
+}>;
 // https://api.slack.com/methods/dnd.setSnooze
 export interface DndSetSnoozeArguments extends TokenOverridable {
   /** @description Number of minutes, from now, to snooze until. */
diff --git a/packages/web-api/src/types/request/emoji.ts b/packages/web-api/src/types/request/emoji.ts
index 3f59549bd..f63b0c515 100644
--- a/packages/web-api/src/types/request/emoji.ts
+++ b/packages/web-api/src/types/request/emoji.ts
@@ -1,6 +1,7 @@
 import { TokenOverridable } from './common';
+import { OptionalArgument } from '../helpers';
 // https://api.slack.com/methods/emoji.list
-export interface EmojiListArguments extends TokenOverridable {
+export type EmojiListArguments = OptionalArgument<TokenOverridable & {
   /** @description Include a list of categories for Unicode emoji and the emoji in each category. */
   include_categories?: boolean;
-}
+}>;
diff --git a/packages/web-api/src/types/request/openid.ts b/packages/web-api/src/types/request/openid.ts
index 9415ffa7e..723cbaa76 100644
--- a/packages/web-api/src/types/request/openid.ts
+++ b/packages/web-api/src/types/request/openid.ts
@@ -1,7 +1,7 @@
 import type { OAuthCredentials, OAuthGrantRefresh } from './common';
+import { OptionalArgument } from '../helpers';
 
 // https://api.slack.com/methods/openid.connect.token
 export interface OpenIDConnectTokenArguments extends OAuthCredentials, OAuthGrantRefresh {}
 // https://api.slack.com/methods/openid.connect.userInfo
-// eslint-disable-next-line @typescript-eslint/no-empty-interface
-export interface OpenIDConnectUserInfoArguments {}
+export type OpenIDConnectUserInfoArguments = OptionalArgument<object>;
diff --git a/packages/web-api/src/types/request/reactions.ts b/packages/web-api/src/types/request/reactions.ts
index 97509fa13..10225bf33 100644
--- a/packages/web-api/src/types/request/reactions.ts
+++ b/packages/web-api/src/types/request/reactions.ts
@@ -7,6 +7,7 @@ import {
   TokenOverridable,
   TraditionalPagingEnabled,
 } from './common';
+import { OptionalArgument } from '../helpers';
 
 interface ReactionsFull {
   /** @description If `true`, return the complete reaction list. */
@@ -23,11 +24,11 @@ export type ReactionsGetArguments = ReactionsFull & TokenOverridable &
 (MessageArgument | FileArgument | FileCommentArgument);
 
 // https://api.slack.com/methods/reactions.list
-export interface ReactionsListArguments extends ReactionsFull, TokenOverridable, TraditionalPagingEnabled,
-  CursorPaginationEnabled, OptionalTeamAssignable {
+export type ReactionsListArguments = OptionalArgument<ReactionsFull & TokenOverridable & TraditionalPagingEnabled &
+CursorPaginationEnabled & OptionalTeamAssignable & {
   /** @description Show reactions made by this user. Defaults to the authed user. */
   user?: string;
-}
+}>;
 // https://api.slack.com/methods/reactions.remove
 export type ReactionsRemoveArguments = TokenOverridable & ReactionName &
 (MessageArgument | FileArgument | FileCommentArgument);
diff --git a/packages/web-api/src/types/request/reminders.ts b/packages/web-api/src/types/request/reminders.ts
index db71a40c0..1ad0d5868 100644
--- a/packages/web-api/src/types/request/reminders.ts
+++ b/packages/web-api/src/types/request/reminders.ts
@@ -1,4 +1,5 @@
 import { OptionalTeamAssignable, TokenOverridable } from './common';
+import { OptionalArgument } from '../helpers';
 
 interface ReminderRecurrenceDailyMonthlyYearly {
   /** @description Specifies the repeating behavior of a reminder. */
@@ -51,4 +52,4 @@ export interface RemindersInfoArguments extends TokenOverridable, OptionalTeamAs
   reminder: string;
 }
 // https://api.slack.com/methods/reminders.list
-export interface RemindersListArguments extends TokenOverridable, OptionalTeamAssignable { }
+export type RemindersListArguments = OptionalArgument<TokenOverridable & OptionalTeamAssignable>;
diff --git a/packages/web-api/src/types/request/rtm.ts b/packages/web-api/src/types/request/rtm.ts
index 2cb243e7b..26e5ea92a 100644
--- a/packages/web-api/src/types/request/rtm.ts
+++ b/packages/web-api/src/types/request/rtm.ts
@@ -1,7 +1,8 @@
 import { LocaleAware, TokenOverridable } from './common';
+import { OptionalArgument } from '../helpers';
 
 // https://api.slack.com/methods/rtm.connect
-export interface RTMConnectArguments extends TokenOverridable {
+export type RTMConnectArguments = OptionalArgument<TokenOverridable & {
   /**
    * @description Batch presence deliveries via subscription. Enabling changes the shape of `presence_change` events.
    * @see {@link https://api.slack.com/docs/presence-and-status#batching batch presence}.
@@ -12,9 +13,9 @@ export interface RTMConnectArguments extends TokenOverridable {
    * @see {@link Only deliver presence events when requested by subscription. presence subscriptions}.
    */
   presence_sub?: boolean;
-}
+}>;
 // https://api.slack.com/methods/rtm.start
-export interface RTMStartArguments extends RTMConnectArguments, LocaleAware {
+export type RTMStartArguments = OptionalArgument<RTMConnectArguments & LocaleAware & {
   /** @description Returns MPIMs to the client in the API response. */
   mpim_aware?: boolean;
   /**
@@ -26,4 +27,4 @@ export interface RTMStartArguments extends RTMConnectArguments, LocaleAware {
   no_unreads?: boolean;
   /** @description Return timestamp only for latest message object of each channel (improves performance). */
   simple_latest?: boolean;
-}
+}>;
diff --git a/packages/web-api/src/types/request/team.ts b/packages/web-api/src/types/request/team.ts
index ed12b997d..d1104255d 100644
--- a/packages/web-api/src/types/request/team.ts
+++ b/packages/web-api/src/types/request/team.ts
@@ -5,25 +5,27 @@ import {
   CursorPaginationEnabled,
   TraditionalPagingEnabled,
 } from './common';
+import { OptionalArgument } from '../helpers';
 
 // https://api.slack.com/methods/team.accessLogs
-export interface TeamAccessLogsArguments extends TokenOverridable, CursorPaginationEnabled,
-  TraditionalPagingEnabled, OptionalTeamAssignable {
+export type TeamAccessLogsArguments = OptionalArgument<TokenOverridable & CursorPaginationEnabled &
+TraditionalPagingEnabled & OptionalTeamAssignable & {
   /**
    * @description End of time range of logs to include in results (inclusive) as a UNIX timestamp in seconds.
    * Default to now.
    */
   before?: number;
-}
+}>;
 // https://api.slack.com/methods/team.billableInfo
-export interface TeamBillableInfoArguments extends TokenOverridable, CursorPaginationEnabled, OptionalTeamAssignable {
+export type TeamBillableInfoArguments = OptionalArgument<TokenOverridable & CursorPaginationEnabled &
+OptionalTeamAssignable & {
   /** @description A user to retrieve the billable information for. Defaults to all users. */
   user?: string;
-}
+}>;
 // https://api.slack.com/methods/team.billing.info
-export interface TeamBillingInfoArguments extends TokenOverridable {}
+export type TeamBillingInfoArguments = OptionalArgument<TokenOverridable>;
 // https://api.slack.com/methods/team.info
-export interface TeamInfoArguments extends TokenOverridable {
+export type TeamInfoArguments = OptionalArgument<TokenOverridable & {
   /**
    * @description Query by domain instead of team (only when `team` is null). This only works for domains in the same
    * enterprise as the querying team token.
@@ -32,21 +34,21 @@ export interface TeamInfoArguments extends TokenOverridable {
   domain?: string; // available only for Enterprise Grid
   /** @description Team to get info about; if omitted, will return information about the current team. */
   team?: string;
-}
+}>;
 // https://api.slack.com/methods/team.integrationLogs
-export interface TeamIntegrationLogsArguments extends Partial<AppID>, TokenOverridable,
-  OptionalTeamAssignable, TraditionalPagingEnabled {
+export type TeamIntegrationLogsArguments = OptionalArgument<Partial<AppID> & TokenOverridable &
+OptionalTeamAssignable & TraditionalPagingEnabled & {
   /** @description Filter logs with this change type. Defaults to all logs. */
   change_type?: 'added' | 'removed' | 'enabled' | 'disabled' | 'updated';
   /** @description Filter logs to this service. Defaults to all logs. */
   service_id?: string;
   /** @description Filter logs generated by this user’s actions. Defaults to all logs. */
   user?: string;
-}
+}>;
 // https://api.slack.com/methods/team.profile.get
-export interface TeamProfileGetArguments extends TokenOverridable {
+export type TeamProfileGetArguments = OptionalArgument<TokenOverridable & {
   /** @description Filter by visibility. */
   visibility?: 'all' | 'visible' | 'hidden';
-}
+}>;
 // https://api.slack.com/methods/team.preferences.list
-export interface TeamPreferencesListArguments extends TokenOverridable { }
+export type TeamPreferencesListArguments = OptionalArgument<TokenOverridable>;
diff --git a/packages/web-api/src/types/request/usergroups.ts b/packages/web-api/src/types/request/usergroups.ts
index 3cbdb1234..9b26e4c9e 100644
--- a/packages/web-api/src/types/request/usergroups.ts
+++ b/packages/web-api/src/types/request/usergroups.ts
@@ -1,4 +1,5 @@
 import { OptionalTeamAssignable, TokenOverridable } from './common';
+import { OptionalArgument } from '../helpers';
 
 interface UsergroupsIncludeCount {
   /** @description Include the number of users in each User Group. */
@@ -27,12 +28,14 @@ export interface UsergroupsEnableArguments extends TokenOverridable, OptionalTea
   usergroup: string;
 }
 // https://api.slack.com/methods/usergroups.list
-export interface UsergroupsListArguments extends TokenOverridable, OptionalTeamAssignable, UsergroupsIncludeCount {
+export type UsergroupsListArguments = OptionalArgument<TokenOverridable & OptionalTeamAssignable &
+UsergroupsIncludeCount & {
   /** @description Include disabled User Groups. */
   include_disabled?: boolean;
   /** @description Include the list of users for each User Group. */
   include_users?: boolean;
-}
+}>;
+
 // https://api.slack.com/methods/usergroups.update
 export interface UsergroupsUpdateArguments extends TokenOverridable, OptionalTeamAssignable,
   Partial<UsergroupsCreateArguments> {
diff --git a/packages/web-api/test/types/methods/admin.apps.test-d.ts b/packages/web-api/test/types/methods/admin.apps.test-d.ts
index 989834cab..54a48a826 100644
--- a/packages/web-api/test/types/methods/admin.apps.test-d.ts
+++ b/packages/web-api/test/types/methods/admin.apps.test-d.ts
@@ -5,9 +5,9 @@ const web = new WebClient('TOKEN');
 
 // admin.apps.activities.list
 // -- sad path
-expectError(web.admin.apps.activities.list()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.admin.apps.activities.list>>([{}]); // all optional args
+expectAssignable<Parameters<typeof web.admin.apps.activities.list>>([]); // no arg is fine
 
 // admin.apps.approve
 // -- sad path
diff --git a/packages/web-api/test/types/methods/admin.barriers.test-d.ts b/packages/web-api/test/types/methods/admin.barriers.test-d.ts
index 9cfe78077..7534848ca 100644
--- a/packages/web-api/test/types/methods/admin.barriers.test-d.ts
+++ b/packages/web-api/test/types/methods/admin.barriers.test-d.ts
@@ -51,9 +51,9 @@ expectAssignable<Parameters<typeof web.admin.barriers.delete>>([{
 
 // admin.barriers.list
 // -- sad path
-expectError(web.admin.barriers.list()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.admin.barriers.list>>([{}]); // all optional args
+expectAssignable<Parameters<typeof web.admin.barriers.list>>([]); // no arg is fine
 
 // admin.barriers.update
 // -- sad path
diff --git a/packages/web-api/test/types/methods/admin.conversations.test-d.ts b/packages/web-api/test/types/methods/admin.conversations.test-d.ts
index eb1c517e2..14a7a8ba3 100644
--- a/packages/web-api/test/types/methods/admin.conversations.test-d.ts
+++ b/packages/web-api/test/types/methods/admin.conversations.test-d.ts
@@ -154,10 +154,10 @@ expectAssignable<Parameters<typeof web.admin.conversations.disconnectShared>>([{
 
 // admin.conversations.ekm.listOriginalConnectedChannelInfo
 // -- sad path
-expectError(web.admin.conversations.ekm.listOriginalConnectedChannelInfo()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.admin.conversations.ekm.listOriginalConnectedChannelInfo>>([{
 }]); // all optional args
+expectAssignable<Parameters<typeof web.admin.conversations.ekm.listOriginalConnectedChannelInfo>>([]); // all optional args
 
 // admin.conversations.getConversationPrefs
 // -- sad path
@@ -287,10 +287,10 @@ expectAssignable<Parameters<typeof web.admin.conversations.restrictAccess.remove
 
 // admin.conversations.search
 // -- sad path
-expectError(web.admin.conversations.search()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.admin.conversations.search>>([{
 }]); // all optional args
+expectAssignable<Parameters<typeof web.admin.conversations.search>>([]); // no arg is fine
 
 // admin.conversations.setConversationPrefs
 // -- sad path
diff --git a/packages/web-api/test/types/methods/admin.emoji.test-d.ts b/packages/web-api/test/types/methods/admin.emoji.test-d.ts
index b04a7c3f9..b16361dc5 100644
--- a/packages/web-api/test/types/methods/admin.emoji.test-d.ts
+++ b/packages/web-api/test/types/methods/admin.emoji.test-d.ts
@@ -37,9 +37,9 @@ expectAssignable<Parameters<typeof web.admin.emoji.addAlias>>([{
 
 // admin.emoji.list
 // -- sad path
-expectError(web.admin.emoji.list()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.admin.emoji.list>>([{}]); // all optional args
+expectAssignable<Parameters<typeof web.admin.emoji.list>>([]); // no arg is fine
 
 // admin.emoji.remove
 // -- sad path
diff --git a/packages/web-api/test/types/methods/admin.roles.test-d.ts b/packages/web-api/test/types/methods/admin.roles.test-d.ts
index 6e670b2c7..de8510707 100644
--- a/packages/web-api/test/types/methods/admin.roles.test-d.ts
+++ b/packages/web-api/test/types/methods/admin.roles.test-d.ts
@@ -47,9 +47,9 @@ expectAssignable<Parameters<typeof web.admin.roles.addAssignments>>([{
 
 // admin.roles.listAssignments
 // -- sad path
-expectError(web.admin.roles.listAssignments()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.admin.roles.listAssignments>>([{}]); // all optional
+expectAssignable<Parameters<typeof web.admin.roles.listAssignments>>([]); // no arg is fine
 
 // admin.roles.removeAssignments
 // -- sad path
diff --git a/packages/web-api/test/types/methods/admin.teams.test-d.ts b/packages/web-api/test/types/methods/admin.teams.test-d.ts
index 7c037bb5e..16580afd8 100644
--- a/packages/web-api/test/types/methods/admin.teams.test-d.ts
+++ b/packages/web-api/test/types/methods/admin.teams.test-d.ts
@@ -30,9 +30,9 @@ expectAssignable<Parameters<typeof web.admin.teams.create>>([{
 
 // admin.teams.list
 // -- sad path
-expectError(web.admin.teams.list()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.admin.teams.list>>([{}]); // all optional
+expectAssignable<Parameters<typeof web.admin.teams.list>>([]); // no arg is fine
 
 // admin.teams.owners.list
 // -- sad path
diff --git a/packages/web-api/test/types/methods/admin.users.test-d.ts b/packages/web-api/test/types/methods/admin.users.test-d.ts
index 5c1ef1b43..b882db662 100644
--- a/packages/web-api/test/types/methods/admin.users.test-d.ts
+++ b/packages/web-api/test/types/methods/admin.users.test-d.ts
@@ -67,7 +67,6 @@ expectAssignable<Parameters<typeof web.admin.users.invite>>([{
 
 // admin.users.list
 // -- sad path
-expectError(web.admin.users.list()); // lacking argument
 expectError(web.admin.users.list({
   team_id: 'T1234',
   include_deactivated_user_workspaces: true, // cannot set both team_id and include_deactivated=true
@@ -77,6 +76,7 @@ expectError(web.admin.users.list({
 }));
 // -- happy path
 expectAssignable<Parameters<typeof web.admin.users.list>>([{}]); // all optional args is ok
+expectAssignable<Parameters<typeof web.admin.users.list>>([]); // no args is fine
 expectAssignable<Parameters<typeof web.admin.users.list>>([{
   team_id: 'T1234',
   include_deactivated_user_workspaces: false, // team_id and include_deactivated=false is ok
@@ -146,7 +146,6 @@ expectAssignable<Parameters<typeof web.admin.users.session.invalidate>>([{
 
 // admin.users.session.list
 // -- sad path
-expectError(web.admin.users.session.list()); // lacking argument
 expectError(web.admin.users.session.list({
   team_id: 'T1234', // if team_id is provided, must also provide user_id
 }));
@@ -155,6 +154,7 @@ expectError(web.admin.users.session.list({
 }));
 // -- happy path
 expectAssignable<Parameters<typeof web.admin.users.session.list>>([{}]); // all optional args is OK
+expectAssignable<Parameters<typeof web.admin.users.session.list>>([]); // no arg is fine
 expectAssignable<Parameters<typeof web.admin.users.session.list>>([{
   team_id: 'T1234',
   user_id: 'U1234', // also providing both team and user id - but has to be both
diff --git a/packages/web-api/test/types/methods/admin.workflows.test-d.ts b/packages/web-api/test/types/methods/admin.workflows.test-d.ts
index 1947d925e..f459961b1 100644
--- a/packages/web-api/test/types/methods/admin.workflows.test-d.ts
+++ b/packages/web-api/test/types/methods/admin.workflows.test-d.ts
@@ -65,12 +65,12 @@ expectAssignable<Parameters<typeof web.admin.workflows.permissions.lookup>>([{
 
 // admin.workflows.search
 // -- sad path
-expectError(web.admin.workflows.search()); // lacking argument
 expectError(web.admin.workflows.search({
   collaborator_ids: [], // must provide at least 1 ID
 }));
 // -- happy path
 expectAssignable<Parameters<typeof web.admin.workflows.search>>([{}]); // all optional args OK
+expectAssignable<Parameters<typeof web.admin.workflows.search>>([]); // no arg is fine
 
 // admin.workflows.unpublish
 // -- sad path
diff --git a/packages/web-api/test/types/methods/api.test-d.ts b/packages/web-api/test/types/methods/api.test-d.ts
index 87aa8a0ac..6eaa29986 100644
--- a/packages/web-api/test/types/methods/api.test-d.ts
+++ b/packages/web-api/test/types/methods/api.test-d.ts
@@ -1,10 +1,10 @@
-import { expectAssignable, expectError } from 'tsd';
+import { expectAssignable } from 'tsd';
 import { WebClient } from '../../../src/WebClient';
 
 const web = new WebClient('TOKEN');
 
 // api.test
 // -- sad path
-expectError(web.api.test()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.api.test>>([{}]); // all optional args
+expectAssignable<Parameters<typeof web.api.test>>([]); // no arg is fine
diff --git a/packages/web-api/test/types/methods/apps.test-d.ts b/packages/web-api/test/types/methods/apps.test-d.ts
index d97492041..63810d8db 100644
--- a/packages/web-api/test/types/methods/apps.test-d.ts
+++ b/packages/web-api/test/types/methods/apps.test-d.ts
@@ -5,9 +5,9 @@ const web = new WebClient('TOKEN');
 
 // apps.connections.open
 // -- sad path
-expectError(web.apps.connections.open()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.apps.connections.open>>([{}]); // all optional args
+expectAssignable<Parameters<typeof web.apps.connections.open>>([]); // no arg is fine
 
 // apps.event.authorizations.list
 // -- sad path
diff --git a/packages/web-api/test/types/methods/auth.test-d.ts b/packages/web-api/test/types/methods/auth.test-d.ts
index 68d817a92..9c5e5f2b8 100644
--- a/packages/web-api/test/types/methods/auth.test-d.ts
+++ b/packages/web-api/test/types/methods/auth.test-d.ts
@@ -1,22 +1,22 @@
-import { expectAssignable, expectError } from 'tsd';
+import { expectAssignable } from 'tsd';
 import { WebClient } from '../../../src/WebClient';
 
 const web = new WebClient('TOKEN');
 
 // auth.revoke
 // -- sad path
-expectError(web.auth.revoke()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.auth.revoke>>([{}]); // all optional args
+expectAssignable<Parameters<typeof web.auth.revoke>>([]); // no arg is fine
 
 // auth.teams.list
 // -- sad path
-expectError(web.auth.teams.list()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.auth.teams.list>>([{}]); // all optional args
+expectAssignable<Parameters<typeof web.auth.teams.list>>([]); // no arg is fine
 
 // auth.test
 // -- sad path
-expectError(web.auth.test()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.auth.test>>([{}]); // all optional args
+expectAssignable<Parameters<typeof web.auth.test>>([]); // no arg is fine
diff --git a/packages/web-api/test/types/methods/bots.test-d.ts b/packages/web-api/test/types/methods/bots.test-d.ts
index 99ab5f04f..582a03f8c 100644
--- a/packages/web-api/test/types/methods/bots.test-d.ts
+++ b/packages/web-api/test/types/methods/bots.test-d.ts
@@ -1,10 +1,10 @@
-import { expectAssignable, expectError } from 'tsd';
+import { expectAssignable } from 'tsd';
 import { WebClient } from '../../../src/WebClient';
 
 const web = new WebClient('TOKEN');
 
 // bots.info
 // -- sad path
-expectError(web.bots.info()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.bots.info>>([{}]); // all optional args
+expectAssignable<Parameters<typeof web.bots.info>>([]); // no arg is fine
diff --git a/packages/web-api/test/types/methods/chat.test-d.ts b/packages/web-api/test/types/methods/chat.test-d.ts
index b30f0e676..602974b6f 100644
--- a/packages/web-api/test/types/methods/chat.test-d.ts
+++ b/packages/web-api/test/types/methods/chat.test-d.ts
@@ -370,9 +370,9 @@ expectAssignable<Parameters<typeof web.chat.scheduleMessage>>([{
 
 // chat.scheduledMessages.list
 // -- sad path
-expectError(web.chat.scheduledMessages.list()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.chat.scheduledMessages.list>>([{}]); // all optional args
+expectAssignable<Parameters<typeof web.chat.scheduledMessages.list>>([]); // no arg is fine
 
 // chat.unfurl
 // -- sad path
diff --git a/packages/web-api/test/types/methods/conversations.test-d.ts b/packages/web-api/test/types/methods/conversations.test-d.ts
index e2d142530..4d5f5f305 100644
--- a/packages/web-api/test/types/methods/conversations.test-d.ts
+++ b/packages/web-api/test/types/methods/conversations.test-d.ts
@@ -169,15 +169,15 @@ expectAssignable<Parameters<typeof web.conversations.leave>>([{
 
 // conversations.list
 // -- sad path
-expectError(web.conversations.list()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.conversations.list>>([{}]); // all optional args
+expectAssignable<Parameters<typeof web.conversations.list>>([]); // no arg is fine
 
 // conversations.listConnectInvites
 // -- sad path
-expectError(web.conversations.listConnectInvites()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.conversations.listConnectInvites>>([{}]); // all optional args
+expectAssignable<Parameters<typeof web.conversations.listConnectInvites>>([]); // no arg is fine
 
 // conversations.mark
 // -- sad path
diff --git a/packages/web-api/test/types/methods/dnd.test-d.ts b/packages/web-api/test/types/methods/dnd.test-d.ts
index a7244d258..ecc891413 100644
--- a/packages/web-api/test/types/methods/dnd.test-d.ts
+++ b/packages/web-api/test/types/methods/dnd.test-d.ts
@@ -5,21 +5,21 @@ const web = new WebClient('TOKEN');
 
 // dnd.endDnd
 // -- sad path
-expectError(web.dnd.endDnd()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.dnd.endDnd>>([{}]); // all optional args
+expectAssignable<Parameters<typeof web.dnd.endDnd>>([]); // no arg is fine
 
 // dnd.endSnooze
 // -- sad path
-expectError(web.dnd.endSnooze()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.dnd.endSnooze>>([{}]); // all optional args
+expectAssignable<Parameters<typeof web.dnd.endSnooze>>([]); // no arg is fine
 
 // dnd.info
 // -- sad path
-expectError(web.dnd.info()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.dnd.info>>([{}]); // all optional args
+expectAssignable<Parameters<typeof web.dnd.info>>([]); // no arg is fine
 
 // dnd.setSnooze
 // -- sad path
diff --git a/packages/web-api/test/types/methods/emoji.test-d.ts b/packages/web-api/test/types/methods/emoji.test-d.ts
index 11b603657..89acc4ebd 100644
--- a/packages/web-api/test/types/methods/emoji.test-d.ts
+++ b/packages/web-api/test/types/methods/emoji.test-d.ts
@@ -1,10 +1,10 @@
-import { expectAssignable, expectError } from 'tsd';
+import { expectAssignable } from 'tsd';
 import { WebClient } from '../../../src/WebClient';
 
 const web = new WebClient('TOKEN');
 
 // emoji.list
 // -- sad path
-expectError(web.emoji.list()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.emoji.list>>([{}]); // all optional args
+expectAssignable<Parameters<typeof web.emoji.list>>([]); // no arg is fine
diff --git a/packages/web-api/test/types/methods/openid.test-d.ts b/packages/web-api/test/types/methods/openid.test-d.ts
index 2e1f748aa..0871960e4 100644
--- a/packages/web-api/test/types/methods/openid.test-d.ts
+++ b/packages/web-api/test/types/methods/openid.test-d.ts
@@ -23,6 +23,6 @@ expectAssignable<Parameters<typeof web.openid.connect.token>>([{
 
 // openid.connect.userInfo
 // -- sad path
-expectError(web.openid.connect.userInfo()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.openid.connect.userInfo>>([{}]); // all optional args
+expectAssignable<Parameters<typeof web.openid.connect.userInfo>>([]); // no arg is fine
diff --git a/packages/web-api/test/types/methods/reactions.test-d.ts b/packages/web-api/test/types/methods/reactions.test-d.ts
index 1251d3540..b7e14a850 100644
--- a/packages/web-api/test/types/methods/reactions.test-d.ts
+++ b/packages/web-api/test/types/methods/reactions.test-d.ts
@@ -53,9 +53,9 @@ expectAssignable<Parameters<typeof web.reactions.get>>([{
 
 // reactions.list
 // -- sad path
-expectError(web.reactions.list()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.reactions.list>>([{}]); // all optional args
+expectAssignable<Parameters<typeof web.reactions.list>>([]); // no arg is fine
 
 // reactions.remove
 // -- sad path
diff --git a/packages/web-api/test/types/methods/reminders.test-d.ts b/packages/web-api/test/types/methods/reminders.test-d.ts
index a193a4e4e..4c815c22f 100644
--- a/packages/web-api/test/types/methods/reminders.test-d.ts
+++ b/packages/web-api/test/types/methods/reminders.test-d.ts
@@ -74,6 +74,6 @@ expectAssignable<Parameters<typeof web.reminders.info>>([{
 
 // reminders.list
 // -- sad path
-expectError(web.reminders.list()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.reminders.list>>([{}]); // all optional args
+expectAssignable<Parameters<typeof web.reminders.list>>([]); // no arg is fine
diff --git a/packages/web-api/test/types/methods/rtm.test-d.ts b/packages/web-api/test/types/methods/rtm.test-d.ts
index 1aa91a7ce..f450abf89 100644
--- a/packages/web-api/test/types/methods/rtm.test-d.ts
+++ b/packages/web-api/test/types/methods/rtm.test-d.ts
@@ -1,16 +1,16 @@
-import { expectAssignable, expectError } from 'tsd';
+import { expectAssignable } from 'tsd';
 import { WebClient } from '../../../src/WebClient';
 
 const web = new WebClient('TOKEN');
 
 // rtm.connect
 // -- sad path
-expectError(web.rtm.connect()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.rtm.connect>>([{}]); // all optional arguments
+expectAssignable<Parameters<typeof web.rtm.connect>>([]); // no arg is fine
 
 // rtm.start
 // -- sad path
-expectError(web.rtm.start()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.rtm.start>>([{}]); // all optional arguments
+expectAssignable<Parameters<typeof web.rtm.start>>([]); // no arg is fine
diff --git a/packages/web-api/test/types/methods/team.test-d.ts b/packages/web-api/test/types/methods/team.test-d.ts
index d332fb684..c454f9f57 100644
--- a/packages/web-api/test/types/methods/team.test-d.ts
+++ b/packages/web-api/test/types/methods/team.test-d.ts
@@ -1,40 +1,46 @@
-import { expectAssignable, expectError } from 'tsd';
+import { expectAssignable } from 'tsd';
 import { WebClient } from '../../../src/WebClient';
 
 const web = new WebClient('TOKEN');
 
 // team.accessLogs
 // -- sad path
-expectError(web.team.accessLogs()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.team.accessLogs>>([{}]); // all optional arguments
+expectAssignable<Parameters<typeof web.team.accessLogs>>([]); // no arg is fine
 
 // team.billableInfo
 // -- sad path
-expectError(web.team.billableInfo()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.team.billableInfo>>([{}]); // all optional arguments
+expectAssignable<Parameters<typeof web.team.billableInfo>>([]); // no arg is fine
 
 // team.billing.info
 // -- sad path
-expectError(web.team.billing.info()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.team.billing.info>>([{}]); // all optional arguments
+expectAssignable<Parameters<typeof web.team.billing.info>>([]); // no arg is fine
+
+// team.info
+// -- sad path
+// -- happy path
+expectAssignable<Parameters<typeof web.team.info>>([{}]); // all optional arguments
+expectAssignable<Parameters<typeof web.team.info>>([]); // no arg is fine
 
 // team.integrationLogs
 // -- sad path
-expectError(web.team.integrationLogs()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.team.integrationLogs>>([{}]); // all optional arguments
+expectAssignable<Parameters<typeof web.team.integrationLogs>>([]); // no arg is fine
 
 // team.profile.get
 // -- sad path
-expectError(web.team.profile.get()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.team.profile.get>>([{}]); // all optional arguments
+expectAssignable<Parameters<typeof web.team.profile.get>>([]); // no arg is fine
 
 // team.preferences.list
 // -- sad path
-expectError(web.team.preferences.list()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.team.preferences.list>>([{}]); // all optional arguments
+expectAssignable<Parameters<typeof web.team.preferences.list>>([]); // no arg is fine
diff --git a/packages/web-api/test/types/methods/usergroups.test-d.ts b/packages/web-api/test/types/methods/usergroups.test-d.ts
index fd1746873..009737c30 100644
--- a/packages/web-api/test/types/methods/usergroups.test-d.ts
+++ b/packages/web-api/test/types/methods/usergroups.test-d.ts
@@ -32,9 +32,9 @@ expectAssignable<Parameters<typeof web.usergroups.enable>>([{
 
 // usergroups.list
 // -- sad path
-expectError(web.usergroups.list()); // lacking argument
 // -- happy path
 expectAssignable<Parameters<typeof web.usergroups.list>>([{}]); // all optional properties
+expectAssignable<Parameters<typeof web.usergroups.list>>([]); // no arg is fine
 
 // usergroups.update
 // -- sad path