diff --git a/dependencies.list b/dependencies.list
index eb618c86ba..19abf07b21 100644
--- a/dependencies.list
+++ b/dependencies.list
@@ -1,11 +1,11 @@
 # Version of MongoDB Realm used by integration tests
 # See https://github.com/realm/ci/packages/147854 for available versions
-MONGODB_REALM_SERVER=2023-05-15
+MONGODB_REALM_SERVER=2023-09-07
 
 # `BAAS` and `BAAS-UI` projects commit hashes matching MONGODB_REALM_SERVER image version
 # note that the MONGODB_REALM_SERVER image is a nightly build, find the matching commits
 # for that date within the following repositories:
 # https://github.com/10gen/baas/
 # https://github.com/10gen/baas-ui/
-REALM_BAAS_GIT_HASH=92fc646871b507c73e48cc05ebec54fc9a134ae7
-REALM_BAAS_UI_GIT_HASH=67ad3606ec1137640ea84dcfe7a1a1b29aa7508f
+REALM_BAAS_GIT_HASH=fc070ea7e874f58eb5b4f7a9d344fa7cdd755817
+REALM_BAAS_UI_GIT_HASH=ca722f5bb7a7485404a68874991ba8e50787ea9a
diff --git a/packages/test-base/src/commonMain/kotlin/io/realm/kotlin/test/util/Utils.kt b/packages/test-base/src/commonMain/kotlin/io/realm/kotlin/test/util/Utils.kt
index 3068aea342..5e72a273dd 100644
--- a/packages/test-base/src/commonMain/kotlin/io/realm/kotlin/test/util/Utils.kt
+++ b/packages/test-base/src/commonMain/kotlin/io/realm/kotlin/test/util/Utils.kt
@@ -25,7 +25,7 @@ import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.withTimeout
 import kotlinx.datetime.Instant
 import kotlin.time.Duration
-import kotlin.time.Duration.Companion.seconds
+import kotlin.time.Duration.Companion.minutes
 
 // Platform independent helper methods
 object Utils {
@@ -92,7 +92,7 @@ fun Instant.toRealmInstant(): RealmInstant {
 }
 
 // Variant of `Channel.receiveOrFail()` that will will throw if a timeout is hit.
-suspend fun <T : Any?> Channel<T>.receiveOrFail(timeout: Duration = 30.seconds): T {
+suspend fun <T : Any?> Channel<T>.receiveOrFail(timeout: Duration = 1.minutes): T {
     return withTimeout(timeout) {
         receive()
     }
diff --git a/packages/test-sync/src/commonTest/kotlin/io/realm/kotlin/test/mongodb/common/FlexibleSyncIntegrationTests.kt b/packages/test-sync/src/commonTest/kotlin/io/realm/kotlin/test/mongodb/common/FlexibleSyncIntegrationTests.kt
index 7ad9ff466a..f6597162ec 100644
--- a/packages/test-sync/src/commonTest/kotlin/io/realm/kotlin/test/mongodb/common/FlexibleSyncIntegrationTests.kt
+++ b/packages/test-sync/src/commonTest/kotlin/io/realm/kotlin/test/mongodb/common/FlexibleSyncIntegrationTests.kt
@@ -146,7 +146,7 @@ class FlexibleSyncIntegrationTests {
                     .query("(name = 'red' OR name = 'blue')")
                 add(query, "sub")
             }
-            assertTrue(realm.subscriptions.waitForSynchronization(60.seconds))
+            assertTrue(realm.subscriptions.waitForSynchronization(120.seconds))
             realm.write {
                 copyToRealm(FlexParentObject(randomSection).apply { name = "red" })
                 copyToRealm(FlexParentObject(randomSection).apply { name = "blue" })
@@ -156,7 +156,7 @@ class FlexibleSyncIntegrationTests {
                 val query = realm.query<FlexParentObject>("section = $0 AND name = 'red'", randomSection)
                 add(query, "sub", updateExisting = true)
             }
-            assertTrue(realm.subscriptions.waitForSynchronization(60.seconds))
+            assertTrue(realm.subscriptions.waitForSynchronization(120.seconds))
             assertEquals(1, realm.query<FlexParentObject>().count().find())
         }
     }
diff --git a/packages/test-sync/src/commonTest/kotlin/io/realm/kotlin/test/mongodb/common/FunctionsTests.kt b/packages/test-sync/src/commonTest/kotlin/io/realm/kotlin/test/mongodb/common/FunctionsTests.kt
index 1fd31781cf..354bc859ac 100644
--- a/packages/test-sync/src/commonTest/kotlin/io/realm/kotlin/test/mongodb/common/FunctionsTests.kt
+++ b/packages/test-sync/src/commonTest/kotlin/io/realm/kotlin/test/mongodb/common/FunctionsTests.kt
@@ -1015,7 +1015,7 @@ class FunctionsTests {
         runBlocking {
             anonUser.logOut()
         }
-        assertFailsWithMessage<ServiceException>("[Service][Unknown(4351)] expected Authorization header with JWT") {
+        assertFailsWithMessage<ServiceException>("[Service][Unknown(4351)] unauthorized") {
             runBlocking {
                 functions.call(FIRST_ARG_FUNCTION.name, 1, 2, 3)
             }
diff --git a/packages/test-sync/src/commonTest/kotlin/io/realm/kotlin/test/mongodb/common/SubscriptionSetTests.kt b/packages/test-sync/src/commonTest/kotlin/io/realm/kotlin/test/mongodb/common/SubscriptionSetTests.kt
index 68976a40bf..b18352c597 100644
--- a/packages/test-sync/src/commonTest/kotlin/io/realm/kotlin/test/mongodb/common/SubscriptionSetTests.kt
+++ b/packages/test-sync/src/commonTest/kotlin/io/realm/kotlin/test/mongodb/common/SubscriptionSetTests.kt
@@ -192,7 +192,10 @@ class SubscriptionSetTests {
         assertFailsWith<BadFlexibleSyncQueryException> {
             subscriptions.waitForSynchronization()
         }
-        assertTrue(subscriptions.errorMessage!!.contains("Client provided query with bad syntax"))
+        assertTrue(
+            subscriptions.errorMessage!!.contains("Invalid query: invalid RQL for table \"FlexParentObject\": syntax error: unexpected Limit, expecting Or or RightParenthesis"),
+            subscriptions.errorMessage
+        )
         subscriptions.update {
             removeAll()
         }
@@ -258,7 +261,10 @@ class SubscriptionSetTests {
             updatedSubs.waitForSynchronization()
         }
         assertEquals(SubscriptionSetState.ERROR, updatedSubs.state)
-        assertTrue(updatedSubs.errorMessage!!.contains("Client provided query with bad syntax"))
+        assertTrue(
+            updatedSubs.errorMessage!!.contains("Invalid query: invalid RQL for table \"FlexParentObject\": syntax error: unexpected Limit, expecting Or or RightParenthesis"),
+            updatedSubs.errorMessage
+        )
     }
 
     // Test case for https://github.com/realm/realm-core/issues/5504
@@ -272,7 +278,10 @@ class SubscriptionSetTests {
         }
         assertEquals(SubscriptionSetState.ERROR, updatedSubs.state)
         assertEquals("TRUEPREDICATE and TRUEPREDICATE LIMIT(1)", updatedSubs.first().queryDescription)
-        assertTrue(updatedSubs.errorMessage!!.contains("Client provided query with bad syntax"))
+        assertTrue(
+            updatedSubs.errorMessage!!.contains("Invalid query: invalid RQL for table \"FlexParentObject\": syntax error: unexpected Limit, expecting Or or RightParenthesis"),
+            updatedSubs.errorMessage
+        )
     }
 
     @Test