diff --git a/src/libslic3r/AppConfig.cpp b/src/libslic3r/AppConfig.cpp
index fd2c4f8651..bf5ecc7f5d 100644
--- a/src/libslic3r/AppConfig.cpp
+++ b/src/libslic3r/AppConfig.cpp
@@ -122,6 +122,9 @@ void AppConfig::set_defaults()
         if (get("auto_toolbar_size").empty())
             set("auto_toolbar_size", "100");
 
+       
+       if (get("notify_testing_release").empty())
+           set("notify_testing_release", "1");
 #if ENABLE_ENVIRONMENT_MAP
         if (get("use_environment_map").empty())
             set("use_environment_map", "0");
diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index 4b5235ec90..a210542019 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -918,6 +918,25 @@ bool GUI_App::on_init_inner()
                 }
             }
             });
+        Bind(EVT_SLIC3R_ALPHA_VERSION_ONLINE, [this](const wxCommandEvent& evt) {
+            //app_config->set("version_alpha_online", into_u8(evt.GetString()));
+            app_config->save();
+            if (this->plater_ != nullptr && app_config->get("notify_testing_release") == "1") {
+                if (*Semver::parse(SLIC3R_VERSION) < *Semver::parse(into_u8(evt.GetString()))) {
+                    this->plater_->get_notification_manager()->push_notification(NotificationType::NewAlphaAvailable);
+                }
+            }
+            });
+        Bind(EVT_SLIC3R_BETA_VERSION_ONLINE, [this](const wxCommandEvent& evt) {
+            //app_config->set("version_beta_online", into_u8(evt.GetString()));
+            app_config->save();
+            if (this->plater_ != nullptr && app_config->get("notify_testing_release") == "1") {
+                if (*Semver::parse(SLIC3R_VERSION) < *Semver::parse(into_u8(evt.GetString()))) {
+                    this->plater_->get_notification_manager()->close_notification_of_type(NotificationType::NewAlphaAvailable);
+                    this->plater_->get_notification_manager()->push_notification(NotificationType::NewBetaAvailable);
+                }
+            }
+            });
     }
     else {
 #ifdef __WXMSW__ 
diff --git a/src/slic3r/GUI/NotificationManager.cpp b/src/slic3r/GUI/NotificationManager.cpp
index ed6f11ddb9..b12256cf06 100644
--- a/src/slic3r/GUI/NotificationManager.cpp
+++ b/src/slic3r/GUI/NotificationManager.cpp
@@ -43,6 +43,10 @@ const NotificationManager::NotificationData NotificationManager::basic_notificat
 	},
 	{NotificationType::NewAppAvailable, NotificationLevel::ImportantNotificationLevel, 20,  _u8L("New version is available."),  _u8L("See Releases page."), [](wxEvtHandler* evnthndlr) {
 		wxGetApp().open_browser_with_warning_dialog("https://github.com/prusa3d/PrusaSlicer/releases"); return true; }},
+	{NotificationType::NewAlphaAvailable, NotificationLevel::ImportantNotificationLevel, 20,  _u8L("New alpha release is available."),  _u8L("See Releases page."), [](wxEvtHandler* evnthndlr) {
+		wxGetApp().open_browser_with_warning_dialog("https://github.com/prusa3d/PrusaSlicer/releases"); return true; }},
+	{NotificationType::NewBetaAvailable, NotificationLevel::ImportantNotificationLevel, 20,  _u8L("New beta release is available."),  _u8L("See Releases page."), [](wxEvtHandler* evnthndlr) {
+		wxGetApp().open_browser_with_warning_dialog("https://github.com/prusa3d/PrusaSlicer/releases"); return true; }},
 	{NotificationType::EmptyColorChangeCode, NotificationLevel::PrintInfoNotificationLevel, 10,
 		_u8L("You have just added a G-code for color change, but its value is empty.\n"
 			 "To export the G-code correctly, check the \"Color Change G-code\" in \"Printer Settings > Custom G-code\"") },
diff --git a/src/slic3r/GUI/NotificationManager.hpp b/src/slic3r/GUI/NotificationManager.hpp
index ad2e315b72..00065f795e 100644
--- a/src/slic3r/GUI/NotificationManager.hpp
+++ b/src/slic3r/GUI/NotificationManager.hpp
@@ -52,6 +52,9 @@ enum class NotificationType
 	// Notification on the start of PrusaSlicer, when a new PrusaSlicer version is published.
 	// Contains a hyperlink to open a web browser pointing to the PrusaSlicer download location.
 	NewAppAvailable,
+	// Like NewAppAvailable but with text and link for alpha / bet release
+	NewAlphaAvailable,
+	NewBetaAvailable,
 	// Notification on the start of PrusaSlicer, when updates of system profiles are detected.
 	// Contains a hyperlink to execute installation of the new system profiles.
 	PresetUpdateAvailable,
diff --git a/src/slic3r/GUI/Preferences.cpp b/src/slic3r/GUI/Preferences.cpp
index 9d12369227..e7ecb0547f 100644
--- a/src/slic3r/GUI/Preferences.cpp
+++ b/src/slic3r/GUI/Preferences.cpp
@@ -375,6 +375,13 @@ void PreferencesDialog::build(size_t selected_tab)
 		def.set_default_value(new ConfigOptionBool{ app_config->get("use_custom_toolbar_size") == "1" });
 		option = Option(def, "use_custom_toolbar_size");
 		m_optgroup_gui->append_single_option_line(option);	
+
+		def.label = L("Notify about testing releases");
+		def.type = coBool;
+		def.tooltip = L("If enabled, you will be notified about alpha / beta releases available for download.");
+		def.set_default_value(new ConfigOptionBool{ app_config->get("notify_testing_release") == "1" });
+		option = Option(def, "notify_testing_release");
+		m_optgroup_gui->append_single_option_line(option);
 	}
 
 	activate_options_tab(m_optgroup_gui);
diff --git a/src/slic3r/Utils/PresetUpdater.cpp b/src/slic3r/Utils/PresetUpdater.cpp
index 97c6cb2a50..f20ddb147d 100644
--- a/src/slic3r/Utils/PresetUpdater.cpp
+++ b/src/slic3r/Utils/PresetUpdater.cpp
@@ -141,7 +141,8 @@ struct Updates
 
 
 wxDEFINE_EVENT(EVT_SLIC3R_VERSION_ONLINE, wxCommandEvent);
-
+wxDEFINE_EVENT(EVT_SLIC3R_ALPHA_VERSION_ONLINE, wxCommandEvent);
+wxDEFINE_EVENT(EVT_SLIC3R_BETA_VERSION_ONLINE, wxCommandEvent);
 
 struct PresetUpdater::priv
 {
@@ -262,21 +263,58 @@ void PresetUpdater::priv::sync_version() const
 		})
 		.on_complete([&](std::string body, unsigned /* http_status */) {
 			boost::trim(body);
-			const auto nl_pos = body.find_first_of("\n\r");
-			if (nl_pos != std::string::npos) {
-				body.resize(nl_pos);
-			}
-
-			if (! Semver::parse(body)) {
-				BOOST_LOG_TRIVIAL(warning) << format("Received invalid contents from `%1%`: Not a correct semver: `%2%`", SLIC3R_APP_NAME, body);
+			// release version
+			std::string version;
+			const auto first_nl_pos = body.find_first_of("\n\r");
+			if (first_nl_pos != std::string::npos)
+				version = body.substr(0,first_nl_pos);
+			else
+				version = body;
+			if (! Semver::parse(version)) {
+				BOOST_LOG_TRIVIAL(warning) << format("Received invalid contents from `%1%`: Not a correct semver: `%2%`", SLIC3R_APP_NAME, version);
 				return;
 			}
-
-			BOOST_LOG_TRIVIAL(info) << format("Got %1% online version: `%2%`. Sending to GUI thread...", SLIC3R_APP_NAME, body);
-
+			BOOST_LOG_TRIVIAL(info) << format("Got %1% online version: `%2%`. Sending to GUI thread...", SLIC3R_APP_NAME, version);
 			wxCommandEvent* evt = new wxCommandEvent(EVT_SLIC3R_VERSION_ONLINE);
-			evt->SetString(GUI::from_u8(body));
+			evt->SetString(GUI::from_u8(version));
 			GUI::wxGetApp().QueueEvent(evt);
+
+			// alpha / beta version
+			size_t nexn_nl_pos = first_nl_pos;
+ 			while (nexn_nl_pos != std::string::npos && body.size() > nexn_nl_pos + 1) {
+				const auto last_nl_pos = nexn_nl_pos;
+				nexn_nl_pos = body.find_first_of("\n\r", last_nl_pos + 1);
+				std::string line;
+				if (nexn_nl_pos == std::string::npos)
+					line = body.substr(last_nl_pos + 1);
+				else
+					line = body.substr(last_nl_pos + 1, nexn_nl_pos - last_nl_pos - 1);
+
+				// alpha
+				if (line.substr(0, 6) == "alpha=") {
+					version = line.substr(6);
+					if (!Semver::parse(version)) {
+						BOOST_LOG_TRIVIAL(warning) << format("Received invalid contents for alpha release from `%1%`: Not a correct semver: `%2%`", SLIC3R_APP_NAME, version);
+						return;
+					}
+					BOOST_LOG_TRIVIAL(info) << format("Got %1% online version of alpha release: `%2%`. Sending to GUI thread...", SLIC3R_APP_NAME, version);
+					wxCommandEvent* evt = new wxCommandEvent(EVT_SLIC3R_ALPHA_VERSION_ONLINE);
+					evt->SetString(GUI::from_u8(version));
+					GUI::wxGetApp().QueueEvent(evt);
+
+				// beta
+				} else if (line.substr(0, 5) == "beta=") {
+					version = line.substr(5);
+					if (!Semver::parse(version)) {
+						BOOST_LOG_TRIVIAL(warning) << format("Received invalid contents for beta release from `%1%`: Not a correct semver: `%2%`", SLIC3R_APP_NAME, version);
+						return;
+					}
+					BOOST_LOG_TRIVIAL(info) << format("Got %1% online version of beta release: `%2%`. Sending to GUI thread...", SLIC3R_APP_NAME, version);
+					wxCommandEvent* evt = new wxCommandEvent(EVT_SLIC3R_BETA_VERSION_ONLINE);
+					evt->SetString(GUI::from_u8(version));
+					GUI::wxGetApp().QueueEvent(evt);
+				}
+			}
 		})
 		.perform_sync();
 }
diff --git a/src/slic3r/Utils/PresetUpdater.hpp b/src/slic3r/Utils/PresetUpdater.hpp
index d7eeb5604b..b7937c5748 100644
--- a/src/slic3r/Utils/PresetUpdater.hpp
+++ b/src/slic3r/Utils/PresetUpdater.hpp
@@ -61,7 +61,7 @@ private:
 };
 
 wxDECLARE_EVENT(EVT_SLIC3R_VERSION_ONLINE, wxCommandEvent);
-
-
+wxDECLARE_EVENT(EVT_SLIC3R_ALPHA_VERSION_ONLINE, wxCommandEvent);
+wxDECLARE_EVENT(EVT_SLIC3R_BETA_VERSION_ONLINE, wxCommandEvent);
 }
 #endif