diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 2301a84..7ce5dda 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -43,4 +43,4 @@ dependencies {
     androidTestImplementation(TestLibraries.espressoCore)
 }
 
-apply(mapOf("plugin" to "com.google.gms.google-services"))
\ No newline at end of file
+//apply(mapOf("plugin" to "com.google.gms.google-services"))
\ No newline at end of file
diff --git a/buildSrc/build/classes/kotlin/main/AndroidxLibraries.class b/buildSrc/build/classes/kotlin/main/AndroidxLibraries.class
index 1861b01..e5f1e50 100644
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diff --git a/buildSrc/build/classes/kotlin/main/FirebaseLibraries.class b/buildSrc/build/classes/kotlin/main/FirebaseLibraries.class
index 54028fa..97bedc3 100644
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diff --git a/buildSrc/build/classes/kotlin/main/TestLibraries.class b/buildSrc/build/classes/kotlin/main/TestLibraries.class
index a1ae7d4..6ba2786 100644
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diff --git a/buildSrc/build/classes/kotlin/main/ThirdPartyLibraries.class b/buildSrc/build/classes/kotlin/main/ThirdPartyLibraries.class
index 16f4495..3b3c4e4 100644
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index 4ff86c3..1d7b959 100644
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index 4b1e137..5b4bd66 100644
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index 7a7ae45..220962d 100644
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index 0af1be7..8d8340d 100644
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index dc1013d..c652451 100644
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index a9671d8..d09bc84 100644
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diff --git a/buildSrc/build/kotlin/compileKotlin/caches-jvm/jvm/kotlin/source-to-classes.tab b/buildSrc/build/kotlin/compileKotlin/caches-jvm/jvm/kotlin/source-to-classes.tab
index cfa8ace..c72208c 100644
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diff --git a/buildSrc/build/kotlin/compileKotlin/caches-jvm/jvm/kotlin/source-to-classes.tab.values.at b/buildSrc/build/kotlin/compileKotlin/caches-jvm/jvm/kotlin/source-to-classes.tab.values.at
index 94fe2c1..10bd0d6 100644
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diff --git a/buildSrc/build/kotlin/compileKotlin/caches-jvm/lookups/counters.tab b/buildSrc/build/kotlin/compileKotlin/caches-jvm/lookups/counters.tab
index 4cc5a1d..38fd31d 100644
--- a/buildSrc/build/kotlin/compileKotlin/caches-jvm/lookups/counters.tab
+++ b/buildSrc/build/kotlin/compileKotlin/caches-jvm/lookups/counters.tab
@@ -1,2 +1,2 @@
-10
-4
\ No newline at end of file
+11
+5
\ No newline at end of file
diff --git a/buildSrc/build/kotlin/compileKotlin/caches-jvm/lookups/file-to-id.tab b/buildSrc/build/kotlin/compileKotlin/caches-jvm/lookups/file-to-id.tab
index e1d8433..5c2e2a3 100644
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index 263bcd3..afce831 100644
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index 907fea4..c15616b 100644
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index ab28cf0..57993c9 100644
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index 46316a9..664f61d 100644
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index 73e7fcf..709f734 100644
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index fcf2d9e..725a74c 100644
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diff --git a/buildSrc/build/kotlin/compileKotlin/caches-jvm/lookups/lookups.tab_i b/buildSrc/build/kotlin/compileKotlin/caches-jvm/lookups/lookups.tab_i
index a727ad1..7643688 100644
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diff --git a/buildSrc/build/kotlin/compileKotlin/last-build.bin b/buildSrc/build/kotlin/compileKotlin/last-build.bin
index 2959e73..36b641b 100644
Binary files a/buildSrc/build/kotlin/compileKotlin/last-build.bin and b/buildSrc/build/kotlin/compileKotlin/last-build.bin differ
diff --git a/buildSrc/build/libs/buildSrc.jar b/buildSrc/build/libs/buildSrc.jar
index b4cdd95..734d6dc 100644
Binary files a/buildSrc/build/libs/buildSrc.jar and b/buildSrc/build/libs/buildSrc.jar differ
diff --git a/buildSrc/src/main/java/Dependencies.kt b/buildSrc/src/main/java/Dependencies.kt
index b5b267a..3bdfbd9 100644
--- a/buildSrc/src/main/java/Dependencies.kt
+++ b/buildSrc/src/main/java/Dependencies.kt
@@ -1,12 +1,13 @@
 object CoreLibraries {
     const val kotlin = "org.jetbrains.kotlin:kotlin-stdlib-jdk8:${Versions.kotlinVersion}"
-    const val coroutines = "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.0-M2"
+
+    const val coroutines =
+        "org.jetbrains.kotlinx:kotlinx-coroutines-core:${Versions.coroutinesVersion}"
     const val koin = "org.koin:koin-android:${Versions.coinVersion}"
     const val koinViewModel = "org.koin:koin-android-viewmodel:${Versions.coinVersion}"
 }
 
 
-
 object ThirdPartyLibraries {
     const val retrofit = "com.squareup.retrofit2:retrofit:2.6.0"
     const val moshi = "com.squareup.moshi:moshi-kotlin:${Versions.moshiVersion}"
@@ -35,4 +36,9 @@ object TestLibraries {
     const val runnner = "com.android.support.test:runner:${Versions.testRunnerVersion}"
     const val espressoCore =
         "com.android.support.test.espresso:espresso-core:${Versions.espressoCoreVersion}"
+    const val mockk = "io.mockk:mockk:${Versions.mockKversion}"
+
+    const val archCoreTesting = "android.arch.core:core-testing:1.0.0"
+    const val coroutinesTesting =
+        "org.jetbrains.kotlinx:kotlinx-coroutines-test:${Versions.coroutinesVersion}"
 }
\ No newline at end of file
diff --git a/buildSrc/src/main/java/Versions.kt b/buildSrc/src/main/java/Versions.kt
index a7e87a9..ff9d0b4 100644
--- a/buildSrc/src/main/java/Versions.kt
+++ b/buildSrc/src/main/java/Versions.kt
@@ -5,6 +5,7 @@ object Release {
 
 object Versions {
 
+    const val mockKversion = "1.9.3"
     /**
      * Sdk Versions
      */
@@ -17,6 +18,7 @@ object Versions {
      */
     const val gradleVersion = "3.5.0-beta05"
     const val kotlinVersion = "1.3.41"
+    const val coroutinesVersion = "1.3.0-M2"
     const val appCompatVersion = "1.0.2"
     const val firebaseVersion = "17.0.0"
     const val constraintLayoutVersion = "1.1.3"
diff --git a/meetupviewmodel/build.gradle.kts b/meetupviewmodel/build.gradle.kts
index 0e1174a..df31c62 100644
--- a/meetupviewmodel/build.gradle.kts
+++ b/meetupviewmodel/build.gradle.kts
@@ -10,6 +10,10 @@ dependencies {
     implementation(AndroidxLibraries.viewModel)
     implementation(CoreLibraries.koin)
     implementation(CoreLibraries.koinViewModel)
+    testImplementation(TestLibraries.mockk)
+    testImplementation(TestLibraries.jUnit)
+    testImplementation(TestLibraries.archCoreTesting)
+    testImplementation(TestLibraries.coroutinesTesting)
 }
 
 android {
@@ -18,6 +22,9 @@ android {
         minSdkVersion(Versions.minSdkVersion)
         targetSdkVersion(Versions.targetSdkVersion)
     }
+    testOptions {
+        unitTests.isReturnDefaultValues = true
+    }
 }
 buildscript {
 
diff --git a/meetupviewmodel/src/main/java/com/gdgistanbul/viewmodel/MeetupViewModel.kt b/meetupviewmodel/src/main/java/com/gdgistanbul/viewmodel/MeetupViewModel.kt
index c81abf3..0937dc9 100644
--- a/meetupviewmodel/src/main/java/com/gdgistanbul/viewmodel/MeetupViewModel.kt
+++ b/meetupviewmodel/src/main/java/com/gdgistanbul/viewmodel/MeetupViewModel.kt
@@ -8,10 +8,8 @@ import com.gdgistanbul.model.Event
 import com.gdgistanbul.repo.MeetupRepo
 import kotlinx.coroutines.launch
 
-class MeetupViewModel(val meetupRepo: MeetupRepo) : ViewModel() {
-    init {
-        refreshEvents()
-    }
+class MeetupViewModel(private val meetupRepo: MeetupRepo) : ViewModel() {
+
 
     val eventsLiveData = MutableLiveData<List<Event>>()
     val toastLiveData = MutableLiveData<String>()
diff --git a/meetupviewmodel/src/test/java/com/gdgistanbul/viewmodel/MeetupViewModelTest.kt b/meetupviewmodel/src/test/java/com/gdgistanbul/viewmodel/MeetupViewModelTest.kt
new file mode 100644
index 0000000..63a9b9e
--- /dev/null
+++ b/meetupviewmodel/src/test/java/com/gdgistanbul/viewmodel/MeetupViewModelTest.kt
@@ -0,0 +1,62 @@
+package com.gdgistanbul.viewmodel
+
+import androidx.arch.core.executor.testing.InstantTaskExecutorRule
+import androidx.lifecycle.Observer
+import com.gdgistanbul.model.Event
+import com.gdgistanbul.repo.MeetupRepo
+import io.mockk.MockKAnnotations
+import io.mockk.coEvery
+import io.mockk.impl.annotations.MockK
+import io.mockk.mockk
+import io.mockk.verify
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.newSingleThreadContext
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.test.resetMain
+import kotlinx.coroutines.test.setMain
+import org.junit.After
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import org.junit.rules.TestRule
+
+class MeetupViewModelTest {
+    @get:Rule
+    var rule: TestRule = InstantTaskExecutorRule()
+
+    private val mainThreadSurrogate = newSingleThreadContext("UI thread")
+
+    @MockK
+    lateinit var meetupRepo: MeetupRepo
+
+    @Before
+    fun initTests() {
+        Dispatchers.setMain(mainThreadSurrogate)
+        MockKAnnotations.init(this)
+    }
+
+    @Test
+    fun `refreshEvents success`() = runBlocking {
+        val eventList: List<Event> = mockk()
+        coEvery { meetupRepo.getEvents() } returns eventList
+        val observer: Observer<List<Event>> = mockk()
+        val viewModel = MeetupViewModel(meetupRepo)
+        viewModel.eventsLiveData.observeForever(observer)
+        viewModel.refreshEvents().join()
+        verify { observer.onChanged(eventList) }
+
+    }
+
+
+    @Test
+    fun `refreshEvents failure`() = runBlocking {
+
+        val viewModel: MeetupViewModel = MeetupViewModel(meetupRepo)
+    }
+
+    @After
+    fun tearDown() {
+        Dispatchers.resetMain() // reset main dispatcher to the original Main dispatcher
+        mainThreadSurrogate.close()
+    }
+}
\ No newline at end of file