diff --git a/syncapi/syncapi_test.go b/syncapi/syncapi_test.go
index 7809cdaba..d3d898394 100644
--- a/syncapi/syncapi_test.go
+++ b/syncapi/syncapi_test.go
@@ -199,7 +199,7 @@ func testSyncAPICreateRoomSyncEarly(t *testing.T, dbType test.DBType) {
 	AddPublicRoutes(base, &syncUserAPI{accounts: []userapi.Device{alice}}, &syncRoomserverAPI{rooms: []*test.Room{room}}, &syncKeyAPI{})
 	for i, msg := range msgs {
 		test.MustPublishMsgs(t, jsctx, msg)
-		time.Sleep(50 * time.Millisecond)
+		time.Sleep(100 * time.Millisecond)
 		w := httptest.NewRecorder()
 		base.PublicClientAPIMux.ServeHTTP(w, test.NewRequest(t, "GET", "/_matrix/client/v3/sync", test.WithQueryParams(map[string]string{
 			"access_token": alice.AccessToken,