diff --git a/src/components/Editor/AvatarParticipationStatus.vue b/src/components/Editor/AvatarParticipationStatus.vue
index fbcb58dbd0..f599791638 100644
--- a/src/components/Editor/AvatarParticipationStatus.vue
+++ b/src/components/Editor/AvatarParticipationStatus.vue
@@ -1,7 +1,10 @@
 <!--
   - @copyright Copyright (c) 2019 Georg Ehrke <oc.list@georgehrke.com>
+  - @copyright Copyright (c) 2023 Jonas Heinrich <heinrich@synyx.net>
   -
   - @author Georg Ehrke <oc.list@georgehrke.com>
+  - @author Jonas Heinrich <heinrich@synyx.net>
+
   -
   - @license AGPL-3.0-or-later
   -
@@ -22,110 +25,119 @@
 
 <template>
 	<div class="avatar-participation-status">
-		<Avatar :disable-tooltip="true"
+		<Avatar v-if="isGroup">
+			<template #icon>
+				<AccountMultiple :size="28" />
+			</template>
+		</Avatar>
+		<Avatar v-else
+			:disable-tooltip="true"
 			:user="commonName"
 			:display-name="commonName"
 			:is-no-user="true" />
-		<template v-if="participationStatus === 'ACCEPTED' && isViewedByOrganizer">
-			<IconCheck class="avatar-participation-status__indicator"
-				fill-color="#32CD32"
-				:size="20" />
-			<div class="avatar-participation-status__text">
-				{{ t('calendar', 'Invitation accepted') }}
-			</div>
-		</template>
-		<template v-else-if="isResource && participationStatus === 'ACCEPTED'">
-			<IconCheck class="avatar-participation-status__indicator"
-				fill-color="#32CD32"
-				:size="20" />
-			<div class="avatar-participation-status__text">
-				{{ t('calendar', 'Available') }}
-			</div>
-		</template>
-		<template v-else-if="isSuggestion">
-			<IconCheck class="avatar-participation-status__indicator"
-				fill-color="#32CD32"
-				:size="20" />
-			<div class="avatar-participation-status__text">
-				{{ t('calendar', 'Suggested') }}
-			</div>
-		</template>
-		<template v-else-if="participationStatus === 'TENTATIVE'">
-			<IconCheck class="avatar-participation-status__indicator"
-				fill-color="#32CD32"
-				:size="20" />
-			<div class="avatar-participation-status__text">
-				{{ t('calendar', 'Participation marked as tentative') }}
-			</div>
-		</template>
-		<template v-else-if="participationStatus === 'ACCEPTED' && !isViewedByOrganizer">
-			<IconCheck class="avatar-participation-status__indicator"
-				fill-color="#32CD32"
-				:size="20" />
-			<div class="avatar-participation-status__text">
-				{{ t('calendar', 'Accepted {organizerName}\'s invitation', {
-					organizerName: organizerDisplayName,
-				}) }}
-			</div>
-		</template>
-		<template v-else-if="isResource && participationStatus === 'DECLINED'">
-			<IconClose class="avatar-participation-status__indicator"
-				:size="20" />
-			<div class="avatar-participation-status__text">
-				{{ t('calendar', 'Not available') }}
-			</div>
-		</template>
-		<template v-else-if="participationStatus === 'DECLINED' && isViewedByOrganizer">
-			<IconClose class="avatar-participation-status__indicator"
-				:size="20" />
-			<div class="avatar-participation-status__text">
-				{{ t('calendar', 'Invitation declined') }}
-			</div>
-		</template>
-		<template v-else-if="participationStatus === 'DECLINED' && !isViewedByOrganizer">
-			<IconClose class="avatar-participation-status__indicator"
-				:size="20" />
-			<div class="avatar-participation-status__text">
-				{{ t('calendar', 'Declined {organizerName}\'s invitation', {
-					organizerName: organizerDisplayName,
-				}) }}
-			</div>
-		</template>
-		<template v-else-if="participationStatus === 'DELEGATED'">
-			<IconDelegated class="avatar-participation-status__indicator"
-				:size="20" />
-			<div class="avatar-participation-status__text">
-				{{ t('calendar', 'Invitation is delegated') }}
-			</div>
-		</template>
-		<template v-else-if="isResource">
-			<IconNoResponse class="avatar-participation-status__indicator"
-				:size="20" />
-			<div class="avatar-participation-status__text">
-				{{ t('calendar', 'Checking availability') }}
-			</div>
-		</template>
-		<template v-else-if="isViewedByOrganizer">
-			<IconNoResponse class="avatar-participation-status__indicator"
-				:size="20" />
-			<div class="avatar-participation-status__text">
-				{{ t('calendar', 'Invitation sent') }}
-			</div>
-		</template>
-		<template v-else>
-			<IconNoResponse class="avatar-participation-status__indicator"
-				:size="20" />
-			<div class="avatar-participation-status__text">
-				{{ t('calendar', 'Has not responded to {organizerName}\'s invitation yet', {
-					organizerName: organizerDisplayName,
-				}) }}
-			</div>
+		<template v-if="!isGroup">
+			<template v-if="participationStatus === 'ACCEPTED' && isViewedByOrganizer">
+				<IconCheck class="avatar-participation-status__indicator"
+					fill-color="#32CD32"
+					:size="20" />
+				<div class="avatar-participation-status__text">
+					{{ t('calendar', 'Invitation accepted') }}
+				</div>
+			</template>
+			<template v-else-if="isResource && participationStatus === 'ACCEPTED'">
+				<IconCheck class="avatar-participation-status__indicator"
+					fill-color="#32CD32"
+					:size="20" />
+				<div class="avatar-participation-status__text">
+					{{ t('calendar', 'Available') }}
+				</div>
+			</template>
+			<template v-else-if="isSuggestion">
+				<IconCheck class="avatar-participation-status__indicator"
+					fill-color="#32CD32"
+					:size="20" />
+				<div class="avatar-participation-status__text">
+					{{ t('calendar', 'Suggested') }}
+				</div>
+			</template>
+			<template v-else-if="participationStatus === 'TENTATIVE'">
+				<IconCheck class="avatar-participation-status__indicator"
+					fill-color="#32CD32"
+					:size="20" />
+				<div class="avatar-participation-status__text">
+					{{ t('calendar', 'Participation marked as tentative') }}
+				</div>
+			</template>
+			<template v-else-if="participationStatus === 'ACCEPTED' && !isViewedByOrganizer">
+				<IconCheck class="avatar-participation-status__indicator"
+					fill-color="#32CD32"
+					:size="20" />
+				<div class="avatar-participation-status__text">
+					{{ t('calendar', 'Accepted {organizerName}\'s invitation', {
+						organizerName: organizerDisplayName,
+					}) }}
+				</div>
+			</template>
+			<template v-else-if="isResource && participationStatus === 'DECLINED'">
+				<IconClose class="avatar-participation-status__indicator"
+					:size="20" />
+				<div class="avatar-participation-status__text">
+					{{ t('calendar', 'Not available') }}
+				</div>
+			</template>
+			<template v-else-if="participationStatus === 'DECLINED' && isViewedByOrganizer">
+				<IconClose class="avatar-participation-status__indicator"
+					:size="20" />
+				<div class="avatar-participation-status__text">
+					{{ t('calendar', 'Invitation declined') }}
+				</div>
+			</template>
+			<template v-else-if="participationStatus === 'DECLINED' && !isViewedByOrganizer">
+				<IconClose class="avatar-participation-status__indicator"
+					:size="20" />
+				<div class="avatar-participation-status__text">
+					{{ t('calendar', 'Declined {organizerName}\'s invitation', {
+						organizerName: organizerDisplayName,
+					}) }}
+				</div>
+			</template>
+			<template v-else-if="participationStatus === 'DELEGATED'">
+				<IconDelegated class="avatar-participation-status__indicator"
+					:size="20" />
+				<div class="avatar-participation-status__text">
+					{{ t('calendar', 'Invitation is delegated') }}
+				</div>
+			</template>
+			<template v-else-if="isResource">
+				<IconNoResponse class="avatar-participation-status__indicator"
+					:size="20" />
+				<div class="avatar-participation-status__text">
+					{{ t('calendar', 'Checking availability') }}
+				</div>
+			</template>
+			<template v-else-if="isViewedByOrganizer">
+				<IconNoResponse class="avatar-participation-status__indicator"
+					:size="20" />
+				<div class="avatar-participation-status__text">
+					{{ t('calendar', 'Invitation sent') }}
+				</div>
+			</template>
+			<template v-else>
+				<IconNoResponse class="avatar-participation-status__indicator"
+					:size="20" />
+				<div class="avatar-participation-status__text">
+					{{ t('calendar', 'Has not responded to {organizerName}\'s invitation yet', {
+						organizerName: organizerDisplayName,
+					}) }}
+				</div>
+			</template>
 		</template>
 	</div>
 </template>
 
 <script>
 import { NcAvatar as Avatar } from '@nextcloud/vue'
+import AccountMultiple from 'vue-material-design-icons/AccountMultiple.vue'
 import IconCheck from 'vue-material-design-icons/CheckCircle.vue'
 import IconNoResponse from 'vue-material-design-icons/HelpCircle.vue'
 import IconClose from 'vue-material-design-icons/CloseCircle.vue'
@@ -134,8 +146,9 @@ import IconDelegated from 'vue-material-design-icons/ArrowRightDropCircle.vue'
 export default {
 	name: 'AvatarParticipationStatus',
 	components: {
-		Avatar,
-		IconCheck,
+	  Avatar,
+	  AccountMultiple,
+	  IconCheck,
 	  IconNoResponse,
 	  IconClose,
 	  IconDelegated,
@@ -162,6 +175,10 @@ export default {
 			type: Boolean,
 			required: true,
 		},
+		isGroup: {
+			type: Boolean,
+			required: false,
+		},
 		isSuggestion: {
 			type: Boolean,
 			default: false,
diff --git a/src/components/Editor/Invitees/InviteesList.vue b/src/components/Editor/Invitees/InviteesList.vue
index 34217beb3b..50c5c9976a 100644
--- a/src/components/Editor/Invitees/InviteesList.vue
+++ b/src/components/Editor/Invitees/InviteesList.vue
@@ -1,8 +1,10 @@
 <!--
   - @copyright Copyright (c) 2019 Georg Ehrke <oc.list@georgehrke.com>
+  - @copyright Copyright (c) 2023 Jonas Heinrich <heinrich@synyx.net>
   -
   - @author Georg Ehrke <oc.list@georgehrke.com>
   - @author Richard Steinmetz <richard@steinmetz.cloud>
+  - @author Jonas Heinrich <heinrich@synyx.net>
   -
   - @license AGPL-3.0-or-later
   -
@@ -30,10 +32,12 @@
 			:is-read-only="isReadOnly || isSharedWithMe"
 			:organizer="calendarObjectInstance.organizer" />
 		<InviteesListItem v-for="invitee in inviteesWithoutOrganizer"
+			v-if="noGroupOrNoneEmpty(invitee)"
 			:key="invitee.email"
 			:attendee="invitee"
 			:is-read-only="isReadOnly || isSharedWithMe"
 			:organizer-display-name="organizerDisplayName"
+			:members="invitee.members"
 			@remove-attendee="removeAttendee" />
 		<NoAttendeesView v-if="isReadOnly && isListEmpty"
 			:message="noInviteesMessage" />
@@ -129,13 +133,42 @@ export default {
 				return !['RESOURCE', 'ROOM'].includes(attendee.attendeeProperty.userType)
 			})
 		},
+		groups() {
+			return this.calendarObjectInstance.attendees.filter(attendee => {
+				return attendee.attendeeProperty.userType === 'GROUP'
+			})
+		},
 		inviteesWithoutOrganizer() {
 			if (!this.calendarObjectInstance.organizer) {
 				return this.invitees
 			}
 
 			return this.invitees
-				.filter(attendee => attendee.uri !== this.calendarObjectInstance.organizer.uri)
+				.filter(attendee => {
+					// Filter attendees which are part of an invited group
+					let isMemberOfGroup = false
+					if (attendee.attendeeProperty.member) {
+						isMemberOfGroup = this.groups.some(function(group) {
+							return attendee.attendeeProperty.member.includes(group.uri)
+								&& attendee.attendeeProperty.userType === 'INDIVIDUAL'
+						})
+					}
+
+					// Add attendee to group member list
+					if (isMemberOfGroup) {
+						this.groups.forEach(group => {
+							if (attendee.member.includes(group.uri)) {
+								if (!group.members) {
+									group.members = []
+								}
+								group.members.push(attendee)
+							}
+						})
+					}
+
+					return attendee.uri !== this.calendarObjectInstance.organizer.uri
+						&& !isMemberOfGroup
+				})
 		},
 		isOrganizer() {
 			return this.calendarObjectInstance.organizer !== null
@@ -204,6 +237,19 @@ export default {
 			})
 		},
 		removeAttendee(attendee) {
+			// Remove attendee from participating group
+			if (attendee.member) {
+				this.groups.forEach(group => {
+					if (attendee.member.includes(group.uri)) {
+						group.members = group.members.filter(member => {
+							if (!attendee.member.includes(group.uri)) {
+								return true
+							}
+							return false
+						})
+					}
+				})
+			}
 			this.$store.commit('removeAttendee', {
 				calendarObjectInstance: this.calendarObjectInstance,
 				attendee,
@@ -251,6 +297,11 @@ export default {
 				this.creatingTalkRoom = false
 			}
 		},
+		noGroupOrNoneEmpty(attendee) {
+			return attendee.attendeeProperty.userType !== 'GROUP'
+				|| (attendee.attendeeProperty.userType === 'GROUP' && attendee.members
+				&& attendee.members.length !== 0)
+		}
 	},
 }
 </script>
diff --git a/src/components/Editor/Invitees/InviteesListItem.vue b/src/components/Editor/Invitees/InviteesListItem.vue
index 1fbf11d221..405065fd21 100644
--- a/src/components/Editor/Invitees/InviteesListItem.vue
+++ b/src/components/Editor/Invitees/InviteesListItem.vue
@@ -1,8 +1,10 @@
 <!--
   - @copyright Copyright (c) 2019 Georg Ehrke <oc.list@georgehrke.com>
+  - @copyright Copyright (c) 2023 Jonas Heinrich <heinrich@synyx.net>
   -
   - @author Georg Ehrke <oc.list@georgehrke.com>
   - @author Richard Steinmetz <richard@steinmetz.cloud>
+  - @author Jonas Heinrich <heinrich@synyx.net>
   -
   - @license AGPL-3.0-or-later
   -
@@ -29,11 +31,29 @@
 			:avatar-link="avatarLink"
 			:participation-status="attendee.participationStatus"
 			:organizer-display-name="organizerDisplayName"
-			:common-name="commonName" />
-		<div class="invitees-list-item__displayname">
+			:common-name="commonName"
+			:is-group="isGroup" />
+		<div class="invitees-list-item__displayname"
+			:class="{ 'invitees-list-item__groupname':members.length }">
 			{{ commonName }}
+			<span v-if="members.length"
+				class="invitees-list-item__member-count">
+				({{ $n('calendar', '%n member', '%n members', members.length) }})
+			</span>
 		</div>
 		<div class="invitees-list-item__actions">
+			<NcButton v-if="members.length"
+				class="icon-collapse"
+				:class="{ 'icon-collapse--open':memberListExpaneded }"
+				type="tertiary"
+				@click="toggleMemberList">
+				<template #icon>
+					<ChevronUp v-if="memberListExpaneded"
+						:size="20" />
+					<ChevronDown v-else
+						:size="20" />
+				</template>
+			</NcButton>
 			<Actions v-if="isViewedByOrganizer">
 				<ActionCheckbox :checked="attendee.rsvp"
 					@change="toggleRSVP">
@@ -61,14 +81,25 @@
 					{{ $t('calendar', 'Non-participant') }}
 				</ActionRadio>
 
-				<ActionButton @click="removeAttendee">
+				<ActionButton @click="removeAttendee(attendee)">
 					<template #icon>
 						<Delete :size="20" decorative />
 					</template>
-					{{ $t('calendar', 'Remove attendee') }}
+					{{ removeAttendeeText }}
 				</ActionButton>
 			</Actions>
 		</div>
+		<div v-if="members.length"
+			class="member-list"
+			:class="{ 'member-list--open':memberListExpaneded }">
+			<InviteesListItem v-for="member in members"
+				:key="member.email"
+				:attendee="member"
+				:is-read-only="isReadOnly"
+				:organizer-display-name="organizerDisplayName"
+				:members="member.members"
+				@remove-attendee="removeAttendee(member)" />
+		</div>
 	</div>
 </template>
 
@@ -79,8 +110,11 @@ import {
 	NcActionButton as ActionButton,
 	NcActionRadio as ActionRadio,
 	NcActionCheckbox as ActionCheckbox,
+	NcButton,
 } from '@nextcloud/vue'
 import { removeMailtoPrefix } from '../../../utils/attendee.js'
+import ChevronDown from 'vue-material-design-icons/ChevronDown.vue'
+import ChevronUp from 'vue-material-design-icons/ChevronUp.vue'
 
 import Delete from 'vue-material-design-icons/Delete.vue'
 
@@ -93,6 +127,9 @@ export default {
 		ActionRadio,
 		Actions,
 		Delete,
+		NcButton,
+		ChevronDown,
+		ChevronUp,
 	},
 	props: {
 		attendee: {
@@ -107,6 +144,16 @@ export default {
 			type: Boolean,
 			required: true,
 		},
+		members: {
+			type: Array,
+			default: () => [],
+			required: false,
+		},
+	},
+	data() {
+		return {
+			memberListExpaneded: false,
+		}
 	},
 	computed: {
 		/**
@@ -116,6 +163,16 @@ export default {
 			// return this.$store.getters.getAvatarForContact(this.uri) || this.commonName
 			return this.commonName
 		},
+		/**
+		 * @return {string}
+		 */
+		removeAttendeeText() {
+			if (this.isGroup) {
+				return this.$t('calendar', 'Remove group')
+			} else {
+				return this.$t('calendar', 'Remove attendee')
+			}
+		},
 		/**
 		 * Common name of the organizer or the uri without the 'mailto:' prefix.
 		 *
@@ -151,6 +208,9 @@ export default {
 			// TODO: check if also viewed by organizer
 			return !this.isReadOnly
 		},
+		isGroup() {
+			return this.attendee.attendeeProperty.userType === 'GROUP'
+		},
 	},
 	methods: {
 		/**
@@ -174,15 +234,30 @@ export default {
 		},
 		/**
 		 * Removes an attendee from the event
+		 *
+		 * @param {object} attendee Attendee object to remove
+		 */
+		removeAttendee(attendee) {
+			this.$emit('remove-attendee', attendee)
+		},
+		/**
+		 * Toggle member list if attendee is a group
 		 */
-		removeAttendee() {
-			this.$emit('remove-attendee', this.attendee)
+		toggleMemberList() {
+			this.memberListExpaneded = !this.memberListExpaneded
 		},
 	},
 }
 </script>
 
 <style lang="scss" scoped>
+.invitees-list-item {
+	flex-wrap: wrap;
+}
+.invitees-list-item__actions {
+	display: flex;
+}
+
 .invitees-list-item__displayname {
 	margin-bottom: 17px;
 	text-overflow: ellipsis;
@@ -190,7 +265,33 @@ export default {
 	white-space: nowrap;
 }
 
+.invitees-list-item__groupname {
+	margin-bottom: 0px;
+}
+
 .avatar-participation-status {
 	margin-top: 5px;
 }
+
+.invitees-list-item__member-count {
+	color: var(--color-text-maxcontrast);
+	font-weight: 300;
+}
+
+.member-list {
+	height: auto;
+	max-height: 0;
+	flex-basis: 100%;
+	overflow: hidden;
+	transition: all 0.3s ease;
+	padding: 0;
+	opacity: 0;
+}
+
+.member-list--open {
+	max-height: 1000px;
+	transition: all 0.3s ease;
+	padding: 0 0 10px 15px;
+	opacity: 1;
+}
 </style>
diff --git a/src/models/attendee.js b/src/models/attendee.js
index 79f68c30b5..7af6c55cc6 100644
--- a/src/models/attendee.js
+++ b/src/models/attendee.js
@@ -1,7 +1,9 @@
 /**
  * @copyright Copyright (c) 2020 Georg Ehrke
+ * @copyright Copyright (c) 2023 Jonas Heinrich
  *
  * @author Georg Ehrke <oc.list@georgehrke.com>
+ * @author Jonas Heinrich <heinrich@synyx.net>
  *
  * @license AGPL-3.0-or-later
  *
@@ -44,6 +46,8 @@ const getDefaultAttendeeObject = (props = {}) => Object.assign({}, {
 	rsvp: false,
 	// The uri of the attendee
 	uri: null,
+	// Member address of the attendee
+	member: null,
 }, props)
 
 /**
@@ -61,6 +65,7 @@ const mapAttendeePropertyToAttendeeObject = (attendeeProperty) => {
 		role: attendeeProperty.role,
 		rsvp: attendeeProperty.rsvp,
 		uri: attendeeProperty.email,
+		member: attendeeProperty.member,
 	})
 }
 
diff --git a/src/store/calendarObjectInstance.js b/src/store/calendarObjectInstance.js
index 3441672921..493bc8d996 100644
--- a/src/store/calendarObjectInstance.js
+++ b/src/store/calendarObjectInstance.js
@@ -1,7 +1,9 @@
 /**
  * @copyright Copyright (c) 2019 Georg Ehrke
+ * @copyright Copyright (c) 2023 Jonas Heinrich
  *
  * @author Georg Ehrke <oc.list@georgehrke.com>
+ * @author Jonas Heinrich <heinrich@synyx.net>
  *
  * @license AGPL-3.0-or-later
  *
@@ -482,6 +484,17 @@ const mutations = {
 	removeAttendee(state, { calendarObjectInstance, attendee }) {
 		calendarObjectInstance.eventComponent.removeAttendee(attendee.attendeeProperty)
 
+		// Also remove members if attendee is a group
+		if (attendee.attendeeProperty.userType === 'GROUP') {
+			attendee.members.forEach(function(member) {
+				calendarObjectInstance.eventComponent.removeAttendee(member.attendeeProperty)
+				const index = calendarObjectInstance.attendees.indexOf(member)
+				if (index !== -1) {
+					calendarObjectInstance.attendees.splice(index, 1)
+				}
+			})
+		}
+
 		const index = calendarObjectInstance.attendees.indexOf(attendee)
 		if (index !== -1) {
 			calendarObjectInstance.attendees.splice(index, 1)
diff --git a/tests/javascript/unit/models/attendee.test.js b/tests/javascript/unit/models/attendee.test.js
index ba83c20da9..b559930141 100644
--- a/tests/javascript/unit/models/attendee.test.js
+++ b/tests/javascript/unit/models/attendee.test.js
@@ -28,6 +28,7 @@ describe('Test suite: Attendee model (models/attendee.js)', () => {
 		expect(getDefaultAttendeeObject()).toEqual({
 			attendeeProperty: null,
 			commonName: null,
+			member: null,
 			calendarUserType: 'INDIVIDUAL',
 			participationStatus: 'NEEDS-ACTION',
 			role: 'REQ-PARTICIPANT',
@@ -43,6 +44,7 @@ describe('Test suite: Attendee model (models/attendee.js)', () => {
 		})).toEqual({
 			attendeeProperty: null,
 			commonName: null,
+			member: null,
 			calendarUserType: 'INDIVIDUAL',
 			participationStatus: 'ACCEPTED',
 			role: 'REQ-PARTICIPANT',
@@ -59,6 +61,7 @@ describe('Test suite: Attendee model (models/attendee.js)', () => {
 		expect(attendeeModel).toEqual({
 			attendeeProperty,
 			commonName: null,
+			member: null,
 			calendarUserType: 'INDIVIDUAL',
 			participationStatus: 'NEEDS-ACTION',
 			role: 'REQ-PARTICIPANT',
@@ -74,6 +77,7 @@ describe('Test suite: Attendee model (models/attendee.js)', () => {
 		expect(attendeeModel).toEqual({
 			attendeeProperty,
 			commonName: null,
+			member: null,
 			calendarUserType: 'GROUP',
 			participationStatus: 'NEEDS-ACTION',
 			role: 'REQ-PARTICIPANT',
@@ -89,6 +93,7 @@ describe('Test suite: Attendee model (models/attendee.js)', () => {
 		expect(attendeeModel).toEqual({
 			attendeeProperty,
 			commonName: null,
+			member: null,
 			calendarUserType: 'INDIVIDUAL',
 			participationStatus: 'DECLINED',
 			role: 'REQ-PARTICIPANT',
@@ -104,6 +109,7 @@ describe('Test suite: Attendee model (models/attendee.js)', () => {
 		expect(attendeeModel).toEqual({
 			attendeeProperty,
 			commonName: null,
+			member: null,
 			calendarUserType: 'INDIVIDUAL',
 			participationStatus: 'NEEDS-ACTION',
 			role: 'CHAIR',
@@ -119,6 +125,7 @@ describe('Test suite: Attendee model (models/attendee.js)', () => {
 		expect(attendeeModel).toEqual({
 			attendeeProperty,
 			commonName: 'Henry Cabot',
+			member: null,
 			calendarUserType: 'INDIVIDUAL',
 			participationStatus: 'TENTATIVE',
 			role: 'REQ-PARTICIPANT',
@@ -134,6 +141,7 @@ describe('Test suite: Attendee model (models/attendee.js)', () => {
 		expect(attendeeModel).toEqual({
 			attendeeProperty,
 			commonName: 'The Big Cheese',
+			member: null,
 			calendarUserType: 'INDIVIDUAL',
 			participationStatus: 'DELEGATED',
 			role: 'NON-PARTICIPANT',
@@ -149,6 +157,7 @@ describe('Test suite: Attendee model (models/attendee.js)', () => {
 		expect(attendeeModel).toEqual({
 			attendeeProperty,
 			commonName: 'Jane Doe',
+			member: null,
 			calendarUserType: 'INDIVIDUAL',
 			participationStatus: 'ACCEPTED',
 			role: 'REQ-PARTICIPANT',