diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/Constants.kt b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/Constants.kt
index b34b6900..ef594568 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/Constants.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/Constants.kt
@@ -14,6 +14,14 @@ val SYSTEM_USER_AGENT = System.getProperty("http.agent") ?: "Dalvik/2.1.0 Androi
 
 val SERVER_USER_AGENT = "Szkolny.eu/${BuildConfig.VERSION_NAME} $SYSTEM_USER_AGENT"
 
+const val FAKE_LIBRUS_API = "http://librus.szkolny.eu/api"
+const val FAKE_LIBRUS_PORTAL = "http://librus.szkolny.eu"
+const val FAKE_LIBRUS_AUTHORIZE = "http://librus.szkolny.eu/authorize.php"
+const val FAKE_LIBRUS_LOGIN = "http://librus.szkolny.eu/login_action.php"
+const val FAKE_LIBRUS_TOKEN = "http://librus.szkolny.eu/access_token.php"
+const val FAKE_LIBRUS_ACCOUNT = "/synergia_accounts_fresh.php?login="
+const val FAKE_LIBRUS_ACCOUNTS = "/synergia_accounts.php"
+
 val LIBRUS_USER_AGENT = "$SYSTEM_USER_AGENT LibrusMobileApp"
 const val SYNERGIA_USER_AGENT = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) Gecko/20100101 Firefox/62.0"
 const val LIBRUS_CLIENT_ID = "wmSyUMo8llDAs4y9tJVYY92oyZ6h4lAt7KCuy0Gv"
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/LoginMethods.kt b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/LoginMethods.kt
index 6dd2ffb9..1d4b6288 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/LoginMethods.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/LoginMethods.kt
@@ -66,13 +66,13 @@ val librusLoginMethods = listOf(
                 },
 
         LoginMethod(LOGIN_TYPE_LIBRUS, LOGIN_METHOD_LIBRUS_SYNERGIA, LibrusLoginSynergia::class.java)
-                .withIsPossible { _, _ -> true }
+                .withIsPossible { _, loginStore -> !loginStore.hasLoginData("fakeLogin") }
                 .withRequiredLoginMethod { profile, _ ->
                     if (profile?.hasStudentData("accountPassword") == false) LOGIN_METHOD_LIBRUS_API else LOGIN_METHOD_NOT_NEEDED
                 },
 
         LoginMethod(LOGIN_TYPE_LIBRUS, LOGIN_METHOD_LIBRUS_MESSAGES, LibrusLoginMessages::class.java)
-                .withIsPossible { _, _ -> true }
+                .withIsPossible { _, loginStore -> !loginStore.hasLoginData("fakeLogin") }
                 .withRequiredLoginMethod { profile, _ ->
                     if (profile?.hasStudentData("accountPassword") == false) LOGIN_METHOD_LIBRUS_SYNERGIA else LOGIN_METHOD_NOT_NEEDED
                 }
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/data/LibrusApi.kt b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/data/LibrusApi.kt
index d913e303..4f8d12eb 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/data/LibrusApi.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/data/LibrusApi.kt
@@ -28,7 +28,7 @@ open class LibrusApi(open val data: DataLibrus) {
 
     fun apiGet(tag: String, endpoint: String, method: Int = GET, payload: JsonObject? = null, onSuccess: (json: JsonObject) -> Unit) {
 
-        d(tag, "Request: Librus/Api - $LIBRUS_API_URL/$endpoint")
+        d(tag, "Request: Librus/Api - ${if (data.fakeLogin) FAKE_LIBRUS_API else LIBRUS_API_URL}/$endpoint")
 
         val callback = object : JsonCallbackHandler() {
             override fun onSuccess(json: JsonObject?, response: Response?) {
@@ -90,7 +90,7 @@ open class LibrusApi(open val data: DataLibrus) {
         }
 
         Request.builder()
-                .url("$LIBRUS_API_URL/$endpoint")
+                .url("${if (data.fakeLogin) FAKE_LIBRUS_API else LIBRUS_API_URL}/$endpoint")
                 .userAgent(LIBRUS_USER_AGENT)
                 .addHeader("Authorization", "Bearer ${data.apiAccessToken}")
                 .apply {
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/data/LibrusPortal.kt b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/data/LibrusPortal.kt
index b86a6956..97fdf33d 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/data/LibrusPortal.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/data/LibrusPortal.kt
@@ -24,7 +24,7 @@ open class LibrusPortal(open val data: DataLibrus) {
 
     fun portalGet(tag: String, endpoint: String, method: Int = GET, payload: JsonObject? = null, onSuccess: (json: JsonObject, response: Response?) -> Unit) {
 
-        d(tag, "Request: Librus/Portal - $LIBRUS_PORTAL_URL$endpoint")
+        d(tag, "Request: Librus/Portal - ${if (data.fakeLogin) FAKE_LIBRUS_PORTAL else LIBRUS_PORTAL_URL}$endpoint")
 
         val callback = object : JsonCallbackHandler() {
             override fun onSuccess(json: JsonObject?, response: Response?) {
@@ -81,7 +81,7 @@ open class LibrusPortal(open val data: DataLibrus) {
         }
 
         Request.builder()
-                .url(LIBRUS_PORTAL_URL + endpoint)
+                .url((if (data.fakeLogin) FAKE_LIBRUS_PORTAL else LIBRUS_PORTAL_URL) + endpoint)
                 .userAgent(LIBRUS_USER_AGENT)
                 .addHeader("Authorization", "Bearer ${data.portalAccessToken}")
                 .apply {
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/firstlogin/LibrusFirstLogin.kt b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/firstlogin/LibrusFirstLogin.kt
index 08daf09a..41d77921 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/firstlogin/LibrusFirstLogin.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/firstlogin/LibrusFirstLogin.kt
@@ -3,6 +3,7 @@ package pl.szczodrzynski.edziennik.api.v2.librus.firstlogin
 import org.greenrobot.eventbus.EventBus
 import pl.szczodrzynski.edziennik.*
 import pl.szczodrzynski.edziennik.api.v2.ERROR_NO_STUDENTS_IN_ACCOUNT
+import pl.szczodrzynski.edziennik.api.v2.FAKE_LIBRUS_ACCOUNTS
 import pl.szczodrzynski.edziennik.api.v2.LIBRUS_ACCOUNTS_URL
 import pl.szczodrzynski.edziennik.api.v2.LOGIN_MODE_LIBRUS_EMAIL
 import pl.szczodrzynski.edziennik.api.v2.events.FirstLoginFinishedEvent
@@ -29,7 +30,7 @@ class LibrusFirstLogin(val data: DataLibrus, val onSuccess: () -> Unit) {
         if (data.loginStore.mode == LOGIN_MODE_LIBRUS_EMAIL) {
             // email login: use Portal for account list
             LibrusLoginPortal(data) {
-                portal.portalGet(TAG, LIBRUS_ACCOUNTS_URL) { json, response ->
+                portal.portalGet(TAG, if (data.fakeLogin) FAKE_LIBRUS_ACCOUNTS else LIBRUS_ACCOUNTS_URL) { json, response ->
                     val accounts = json.getJsonArray("accounts")
 
                     if (accounts == null || accounts.size() < 1) {
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/login/LibrusLoginPortal.kt b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/login/LibrusLoginPortal.kt
index 67730e01..dc129626 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/login/LibrusLoginPortal.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/login/LibrusLoginPortal.kt
@@ -7,14 +7,15 @@ import im.wangchao.mhttp.Response
 import im.wangchao.mhttp.body.MediaTypeUtils
 import im.wangchao.mhttp.callback.JsonCallbackHandler
 import im.wangchao.mhttp.callback.TextCallbackHandler
-import pl.szczodrzynski.edziennik.*
 import pl.szczodrzynski.edziennik.api.v2.*
 import pl.szczodrzynski.edziennik.api.v2.librus.DataLibrus
 import pl.szczodrzynski.edziennik.api.v2.models.ApiError
-import pl.szczodrzynski.edziennik.utils.Utils
+import pl.szczodrzynski.edziennik.getInt
+import pl.szczodrzynski.edziennik.getString
+import pl.szczodrzynski.edziennik.getUnixDate
 import pl.szczodrzynski.edziennik.utils.Utils.d
 import java.net.HttpURLConnection.HTTP_UNAUTHORIZED
-import java.util.ArrayList
+import java.util.*
 import java.util.regex.Pattern
 
 class LibrusLoginPortal(val data: DataLibrus, val onSuccess: () -> Unit) {
@@ -42,7 +43,7 @@ class LibrusLoginPortal(val data: DataLibrus, val onSuccess: () -> Unit) {
         }
         else {
             data.app.cookieJar.clearForDomain("portal.librus.pl")
-            authorize(LIBRUS_AUTHORIZE_URL)
+            authorize(if (data.fakeLogin) FAKE_LIBRUS_AUTHORIZE else LIBRUS_AUTHORIZE_URL)
         }
     }}
 
@@ -86,10 +87,10 @@ class LibrusLoginPortal(val data: DataLibrus, val onSuccess: () -> Unit) {
     }
 
     private fun login(csrfToken: String) {
-        d(TAG, "Request: Librus/Login/Portal - $LIBRUS_LOGIN_URL")
+        d(TAG, "Request: Librus/Login/Portal - ${if (data.fakeLogin) FAKE_LIBRUS_LOGIN else LIBRUS_LOGIN_URL}")
 
         Request.builder()
-                .url(LIBRUS_LOGIN_URL)
+                .url(if (data.fakeLogin) FAKE_LIBRUS_LOGIN else LIBRUS_LOGIN_URL)
                 .userAgent(LIBRUS_USER_AGENT)
                 .addParameter("email", data.portalEmail)
                 .addParameter("password", data.portalPassword)
@@ -135,7 +136,7 @@ class LibrusLoginPortal(val data: DataLibrus, val onSuccess: () -> Unit) {
 
     private var refreshTokenFailed = false
     private fun accessToken(code: String?, refreshToken: String?) {
-        d(TAG, "Request: Librus/Login/Portal - $LIBRUS_TOKEN_URL")
+        d(TAG, "Request: Librus/Login/Portal - ${if (data.fakeLogin) FAKE_LIBRUS_TOKEN else LIBRUS_TOKEN_URL}")
 
         val onSuccess = { json: JsonObject, response: Response? ->
             data.portalAccessToken = json.getString("access_token")
@@ -204,7 +205,7 @@ class LibrusLoginPortal(val data: DataLibrus, val onSuccess: () -> Unit) {
         }
 
         Request.builder()
-                .url(LIBRUS_TOKEN_URL)
+                .url(if (data.fakeLogin) FAKE_LIBRUS_TOKEN else LIBRUS_TOKEN_URL)
                 .userAgent(LIBRUS_USER_AGENT)
                 .addParams(params)
                 .post()
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/login/SynergiaTokenExtractor.kt b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/login/SynergiaTokenExtractor.kt
index 27fdbe6a..0d80cd65 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/login/SynergiaTokenExtractor.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/librus/login/SynergiaTokenExtractor.kt
@@ -43,7 +43,7 @@ class SynergiaTokenExtractor(override val data: DataLibrus, val onSuccess: () ->
         val accountLogin = data.apiLogin ?: return false
         data.portalAccessToken ?: return false
 
-        d(TAG, "Request: Librus/SynergiaTokenExtractor - $LIBRUS_ACCOUNT_URL$accountLogin")
+        d(TAG, "Request: Librus/SynergiaTokenExtractor - ${if (data.fakeLogin) FAKE_LIBRUS_ACCOUNT else LIBRUS_ACCOUNT_URL}$accountLogin")
 
         val onSuccess = { json: JsonObject, response: Response? ->
             // synergiaAccount is executed when a synergia token needs a refresh
@@ -67,7 +67,7 @@ class SynergiaTokenExtractor(override val data: DataLibrus, val onSuccess: () ->
             }
         }
 
-        portalGet(TAG, LIBRUS_ACCOUNT_URL+accountLogin, onSuccess = onSuccess)
+        portalGet(TAG, (if (data.fakeLogin) FAKE_LIBRUS_ACCOUNT else LIBRUS_ACCOUNT_URL)+accountLogin, onSuccess = onSuccess)
         return true
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/models/Data.kt b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/models/Data.kt
index bac36618..2db316d3 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/models/Data.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/api/v2/models/Data.kt
@@ -5,7 +5,7 @@ import android.util.SparseArray
 import androidx.core.util.size
 import com.google.gson.JsonObject
 import im.wangchao.mhttp.Response
-import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.*
 import pl.szczodrzynski.edziennik.api.v2.DataNotifications
 import pl.szczodrzynski.edziennik.api.v2.EXCEPTION_NOTIFY_AND_SYNC
 import pl.szczodrzynski.edziennik.api.v2.ServerSync
@@ -38,11 +38,8 @@ import pl.szczodrzynski.edziennik.data.db.modules.teachers.Teacher
 import pl.szczodrzynski.edziennik.data.db.modules.teachers.TeacherAbsence
 import pl.szczodrzynski.edziennik.data.db.modules.teachers.TeacherAbsenceType
 import pl.szczodrzynski.edziennik.data.db.modules.teams.Team
-import pl.szczodrzynski.edziennik.singleOrNull
-import pl.szczodrzynski.edziennik.toSparseArray
 import pl.szczodrzynski.edziennik.utils.Utils.d
 import pl.szczodrzynski.edziennik.utils.models.Date
-import pl.szczodrzynski.edziennik.values
 import java.io.InterruptedIOException
 import java.net.SocketTimeoutException
 import java.net.UnknownHostException
@@ -167,6 +164,9 @@ open class Data(val app: App, val profile: Profile?, val loginStore: LoginStore)
     val db: AppDb by lazy { app.db }
 
     init {
+        if (BuildConfig.DEBUG) {
+            fakeLogin = loginStore.hasLoginData("fakeLogin")
+        }
         clear()
         if (profile != null) {
             endpointTimers = db.endpointTimerDao().getAllNow(profile.id).toMutableList()
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginChooserFragment.java b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginChooserFragment.java
index 7f5a2c49..2aff483c 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginChooserFragment.java
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginChooserFragment.java
@@ -14,6 +14,7 @@ import androidx.navigation.NavController;
 import androidx.navigation.Navigation;
 
 import pl.szczodrzynski.edziennik.App;
+import pl.szczodrzynski.edziennik.BuildConfig;
 import pl.szczodrzynski.edziennik.R;
 import pl.szczodrzynski.edziennik.databinding.FragmentLoginChooserBinding;
 import pl.szczodrzynski.edziennik.ui.modules.feedback.FeedbackActivity;
@@ -26,6 +27,7 @@ public class LoginChooserFragment extends Fragment {
     private NavController nav;
     private FragmentLoginChooserBinding b;
     private static final String TAG = "LoginTemplate";
+    public static boolean fakeLogin = false;
 
     public LoginChooserFragment() { }
 
@@ -71,6 +73,10 @@ public class LoginChooserFragment extends Fragment {
             b.cancelButton.setVisibility(View.GONE);
         }
 
+        b.fakeLogin.setVisibility(BuildConfig.DEBUG ? View.VISIBLE : View.GONE);
+        b.fakeLogin.setChecked(fakeLogin);
+        b.fakeLogin.setOnCheckedChangeListener((v, isChecked) -> fakeLogin = isChecked);
+
         b.helpButton.setOnClickListener((v -> {
             startActivity(new Intent(getActivity(), FeedbackActivity.class));
         }));
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginProgressFragment.java b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginProgressFragment.java
index f7b84db8..08c7e919 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginProgressFragment.java
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginProgressFragment.java
@@ -19,6 +19,7 @@ import org.greenrobot.eventbus.Subscribe;
 import org.greenrobot.eventbus.ThreadMode;
 
 import pl.szczodrzynski.edziennik.App;
+import pl.szczodrzynski.edziennik.BuildConfig;
 import pl.szczodrzynski.edziennik.R;
 import pl.szczodrzynski.edziennik.api.v2.events.ApiTaskErrorEvent;
 import pl.szczodrzynski.edziennik.api.v2.events.FirstLoginFinishedEvent;
@@ -89,6 +90,10 @@ public class LoginProgressFragment extends Fragment {
         LoginStore loginStore = new LoginStore(-1, loginType, new JsonObject());
         loginStore.copyFrom(args);
 
+        if (BuildConfig.DEBUG && LoginChooserFragment.fakeLogin) {
+            loginStore.putLoginData("fakeLogin", true);
+        }
+
         EdziennikTask.Companion.firstLogin(loginStore).enqueue(getContext());
     }
 
diff --git a/app/src/main/res/layout/fragment_login_chooser.xml b/app/src/main/res/layout/fragment_login_chooser.xml
index 78201b71..9b7937fa 100644
--- a/app/src/main/res/layout/fragment_login_chooser.xml
+++ b/app/src/main/res/layout/fragment_login_chooser.xml
@@ -151,6 +151,16 @@
                         </FrameLayout>
 
                     </LinearLayout>
+
+                    <Switch
+                        android:id="@+id/fakeLogin"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:layout_marginLeft="24dp"
+                        android:layout_marginTop="16dp"
+                        android:layout_marginRight="24dp"
+                        android:text="Fake login" />
+
                 </LinearLayout>
 
             </LinearLayout>
diff --git a/app/src/main/res/layout/timetable_lesson.xml b/app/src/main/res/layout/timetable_lesson.xml
index 5fadc319..47892c39 100644
--- a/app/src/main/res/layout/timetable_lesson.xml
+++ b/app/src/main/res/layout/timetable_lesson.xml
@@ -3,6 +3,8 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools">
     <data>
+
+        <import type="android.view.View" />
         <variable
             name="annotationVisible"
             type="boolean"/>
@@ -89,12 +91,13 @@
                     android:layout_gravity="center_vertical"
                     android:fontFamily="sans-serif-condensed-light"
                     android:includeFontPadding="false"
-                    android:layout_marginTop="@{annotationVisible ? -4 : 4}"
-                    android:layout_marginBottom="@{annotationVisible ? -4 : 0}"
+
                     android:paddingStart="4dp"
                     android:paddingEnd="4dp"
                     android:text="9"
                     tools:textSize="28sp"/>
+                <!--android:layout_marginTop="@{annotationVisible ? `-4dp` : `4dp`}"
+                    android:layout_marginBottom="@{annotationVisible ? `-4dp` : `0dp`}"-->
 
             </LinearLayout>