diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/general/versionChecker/VersionCheckerUtils.kt b/app/src/main/java/info/nightscout/androidaps/plugins/general/versionChecker/VersionCheckerUtils.kt
index a7d167d801..c1378451df 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/general/versionChecker/VersionCheckerUtils.kt
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/general/versionChecker/VersionCheckerUtils.kt
@@ -23,7 +23,7 @@ fun isConnected(): Boolean {
 
 // convert inputstream to String
 @Throws(IOException::class)
-fun InputStream.findVersion(): String? {
+inline fun InputStream.findVersion(): String? {
     val regex = "(.*)version(.*)\"(((\\d+)\\.)+(\\d+))\"(.*)".toRegex()
     return bufferedReader()
             .readLines()
@@ -41,19 +41,31 @@ fun checkVersion() = if (isConnected()) {
             val request = HttpGet("https://raw.githubusercontent.com/MilosKozak/AndroidAPS/master/app/build.gradle")
             val response: HttpResponse = DefaultHttpClient().execute(request)
             val version: String? = response.entity.content?.findVersion()
-            val comparison = version?.compareTo(BuildConfig.VERSION_NAME.replace("\"", "")) ?: 0
-            if (comparison == 0) {
-                log.debug("Version equal to master of fetch failed")
-            } else if (comparison > 0) {
-                log.debug("Version outdated. Found $version")
-                val notification = Notification(Notification.NEWVERSIONDETECTED, String.format(MainApp.gs(R.string.versionavailable), version.toString()), Notification.LOW)
-                MainApp.bus().post(EventNewNotification(notification))
-            } else {
-                log.debug("Version newer than master. Are you developer?")
-            }
+            compareWithCurrentVersion(version, BuildConfig.VERSION_NAME)
         } catch (e: IOException) {
             log.debug("Github master version check error: $e")
         }
     }.start()
 } else
-    log.debug("Github master version no checked. No connectivity")
\ No newline at end of file
+    log.debug("Github master version no checked. No connectivity")
+
+fun compareWithCurrentVersion(newVersion: String?, currentVersion: String) {
+    val comparison = newVersion?.versionStrip()?.compareTo(currentVersion.versionStrip()) ?: 0
+    when {
+        comparison == 0 -> log.debug("Version equal to master of fetch failed")
+        comparison > 0 -> {
+            log.debug("Version ${currentVersion} outdated. Found $newVersion")
+            val notification = Notification(Notification.NEWVERSIONDETECTED, String.format(MainApp.gs(R.string.versionavailable), newVersion.toString()), Notification.LOW)
+            MainApp.bus().post(EventNewNotification(notification))
+        }
+        else -> log.debug("Version newer than master. Are you developer?")
+    }
+}
+
+ fun String.versionStrip() = this.mapNotNull {
+     when (it) {
+         in '0'..'9' -> it
+         '.' -> it
+         else -> null
+     }
+ }.joinToString (separator = "")
\ No newline at end of file
diff --git a/app/src/test/java/info/nightscout/androidaps/plugins/general/versionChecker/VersionCheckerUtilsKtTest.kt b/app/src/test/java/info/nightscout/androidaps/plugins/general/versionChecker/VersionCheckerUtilsKtTest.kt
index d5af3a9409..503c8d46be 100644
--- a/app/src/test/java/info/nightscout/androidaps/plugins/general/versionChecker/VersionCheckerUtilsKtTest.kt
+++ b/app/src/test/java/info/nightscout/androidaps/plugins/general/versionChecker/VersionCheckerUtilsKtTest.kt
@@ -1,8 +1,18 @@
 package info.nightscout.androidaps.plugins.general.versionChecker
 
+import com.squareup.otto.Bus
+import info.nightscout.androidaps.MainApp
+import info.nightscout.androidaps.logging.L
 import org.junit.Assert.assertEquals
 import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.ArgumentMatchers
+import org.mockito.Mockito.*
+import org.powermock.api.mockito.PowerMockito
+import org.powermock.core.classloader.annotations.PrepareForTest
+import org.powermock.modules.junit4.PowerMockRunner
 
+@RunWith(PowerMockRunner::class)
 class VersionCheckerUtilsKtTest {
     @Test
     fun findVersionMatchesRegularVersion() {
@@ -17,9 +27,10 @@ class VersionCheckerUtilsKtTest {
         assertEquals("2.2.2", detectedVersion)
     }
 
-    // 04. Break stuff.mp3 like it's 1999. Again. Pizza delivery! For i c wiener ...
-    //@Test
-    fun findVersionMatchesCustomVersion() {
+
+    // In case we merge a "x.x.x-dev" into master, don't see it as update.
+    @Test
+    fun `should return null on non-digit versions on master`() {
         val buildGradle = """blabla
             |   android {
             |      aosenuthoae
@@ -28,7 +39,7 @@ class VersionCheckerUtilsKtTest {
             |   appName = "Aaoeu"
         """.trimMargin()
         val detectedVersion: String? = buildGradle.byteInputStream().findVersion()
-        assertEquals("2.2.2", detectedVersion)
+        assertEquals(null, detectedVersion)
     }
 
     @Test
@@ -37,4 +48,73 @@ class VersionCheckerUtilsKtTest {
         val detectedVersion: String? = buildGradle.byteInputStream().findVersion()
         assertEquals(null, detectedVersion)
     }
+
+    @Test
+    fun testVersionStrip() {
+        assertEquals("2.2.2", "2.2.2".versionStrip())
+        assertEquals("2.2.2", "2.2.2-dev".versionStrip())
+        assertEquals("2.2.2", "2.2.2dev".versionStrip())
+        assertEquals("2.2.2", """"2.2.2"""".versionStrip())
+    }
+
+    @Test
+    @PrepareForTest(MainApp::class, L::class)
+    fun `should find update1`() {
+        val bus = prepareCompareTests()
+        compareWithCurrentVersion(newVersion = "2.2.3", currentVersion = "2.2.1")
+        verify(bus, times(1)).post(any())
+    }
+
+    @Test
+    @PrepareForTest(MainApp::class, L::class)
+    fun `should find update2`() {
+        val bus = prepareCompareTests()
+        compareWithCurrentVersion(newVersion = "2.2.3", currentVersion = "2.2.1-dev")
+        verify(bus, times(1)).post(any())
+    }
+
+    @Test
+    @PrepareForTest(MainApp::class, L::class)
+    fun `should find update3`() {
+        val bus = prepareCompareTests()
+        compareWithCurrentVersion(newVersion = "2.2.3", currentVersion = "2.1")
+        verify(bus, times(1)).post(any())
+    }
+
+    @Test
+    @PrepareForTest(MainApp::class, L::class)
+    fun `should find update4`() {
+        val bus = prepareCompareTests()
+
+        compareWithCurrentVersion(newVersion = "2.2", currentVersion = "2.1.1")
+
+        verify(bus, times(1)).post(any())
+    }
+
+    @Test
+    @PrepareForTest(MainApp::class, L::class)
+    fun `should find update5`() {
+        val bus = prepareCompareTests()
+        compareWithCurrentVersion(newVersion = "2.2.1", currentVersion = "2.2-dev")
+        verify(bus, times(1)).post(any())
+    }
+
+    @Test
+    @PrepareForTest(MainApp::class, L::class)
+    fun `should find update6`() {
+        val bus = prepareCompareTests()
+        compareWithCurrentVersion(newVersion = "2.2.1", currentVersion = "2.2dev")
+        verify(bus, times(1)).post(any())
+    }
+
+
+    private fun prepareCompareTests(): Bus {
+        PowerMockito.mockStatic(MainApp::class.java)
+        val mainApp = mock<MainApp>(MainApp::class.java)
+        `when`(MainApp.instance()).thenReturn(mainApp)
+        val bus = mock(Bus::class.java)
+        `when`(MainApp.bus()).thenReturn(bus)
+        `when`(MainApp.gs(ArgumentMatchers.anyInt())).thenReturn("some dummy string")
+        return bus
+    }
 }
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