diff --git a/libraries/matrix/impl/src/test/kotlin/io/element/android/libraries/matrix/impl/fixtures/FakeRustRoom.kt b/libraries/matrix/impl/src/test/kotlin/io/element/android/libraries/matrix/impl/fixtures/FakeRustRoom.kt
index f8f8b88a98..a9321bf347 100644
--- a/libraries/matrix/impl/src/test/kotlin/io/element/android/libraries/matrix/impl/fixtures/FakeRustRoom.kt
+++ b/libraries/matrix/impl/src/test/kotlin/io/element/android/libraries/matrix/impl/fixtures/FakeRustRoom.kt
@@ -7,29 +7,27 @@
 
 package io.element.android.libraries.matrix.impl.fixtures
 
+import io.element.android.libraries.matrix.api.core.RoomId
 import io.element.android.libraries.matrix.test.A_ROOM_ID
+import io.element.android.tests.testutils.lambda.lambdaError
 import org.matrix.rustcomponents.sdk.NoPointer
 import org.matrix.rustcomponents.sdk.Room
 import org.matrix.rustcomponents.sdk.RoomMembersIterator
 
 class FakeRustRoom(
-    private val getMembers: () -> RoomMembersIterator = { FakeRustRoomMembersIterator() },
-    private val getMembersNoSync: () -> RoomMembersIterator = { FakeRustRoomMembersIterator() },
+    private val roomId: RoomId = A_ROOM_ID,
+    private val getMembers: () -> RoomMembersIterator = { lambdaError() },
+    private val getMembersNoSync: () -> RoomMembersIterator = { lambdaError() },
 ) : Room(NoPointer) {
-    var membersCallCount = 0
-    var membersNoSyncCallCount = 0
-
     override fun id(): String {
-        return A_ROOM_ID.value
+        return roomId.value
     }
 
     override suspend fun members(): RoomMembersIterator {
-        membersCallCount++
         return getMembers()
     }
 
     override suspend fun membersNoSync(): RoomMembersIterator {
-        membersNoSyncCallCount++
         return getMembersNoSync()
     }
 
diff --git a/libraries/matrix/impl/src/test/kotlin/io/element/android/libraries/matrix/impl/room/member/RoomMemberListFetcherTest.kt b/libraries/matrix/impl/src/test/kotlin/io/element/android/libraries/matrix/impl/room/member/RoomMemberListFetcherTest.kt
index 87e2f5a0b7..dc8489e48f 100644
--- a/libraries/matrix/impl/src/test/kotlin/io/element/android/libraries/matrix/impl/room/member/RoomMemberListFetcherTest.kt
+++ b/libraries/matrix/impl/src/test/kotlin/io/element/android/libraries/matrix/impl/room/member/RoomMemberListFetcherTest.kt
@@ -50,10 +50,6 @@ class RoomMemberListFetcherTest {
             val cachedItemsState = awaitItem()
             assertThat(cachedItemsState).isInstanceOf(MatrixRoomMembersState.Ready::class.java)
             assertThat((cachedItemsState as? MatrixRoomMembersState.Ready)?.roomMembers).hasSize(3)
-
-            // Assert only the 'no sync' method was called, so no new member sync happened
-            assertThat(room.membersNoSyncCallCount).isEqualTo(1)
-            assertThat(room.membersCallCount).isEqualTo(0)
         }
     }
 
@@ -133,10 +129,6 @@ class RoomMemberListFetcherTest {
             assertThat(awaitItem()).isInstanceOf(MatrixRoomMembersState.Unknown::class.java)
             assertThat(awaitItem()).isInstanceOf(MatrixRoomMembersState.Pending::class.java)
             assertThat((awaitItem() as? MatrixRoomMembersState.Ready)?.roomMembers?.size).isEqualTo(3)
-
-            // Assert only the 'sync' method was called, so a new member sync happened
-            assertThat(room.membersNoSyncCallCount).isEqualTo(0)
-            assertThat(room.membersCallCount).isEqualTo(1)
         }
     }
 
@@ -191,10 +183,6 @@ class RoomMemberListFetcherTest {
                 assertThat(ready).isInstanceOf(MatrixRoomMembersState.Ready::class.java)
                 assertThat(ready.roomMembers()).hasSize(3)
             }
-
-            // Assert both member methods were called, so both the cache was hit and a new member sync happened
-            assertThat(room.membersNoSyncCallCount).isEqualTo(1)
-            assertThat(room.membersCallCount).isEqualTo(1)
         }
     }
 }