diff --git a/README.md b/README.md
index fe78b7c..126cfd2 100644
--- a/README.md
+++ b/README.md
@@ -11,4 +11,7 @@
 
 ## 🎲  2단계
 1. loadGithubProfile 메소드 호출 성공 시 GithubProfile을 가져온다.
-2. loadGithubProfile 메소드 호출 실패 시 isError의 value 가 True가 된다.
\ No newline at end of file
+2. loadGithubProfile 메소드 호출 실패 시 isError의 value 가 True가 된다.
+
+## 🎲  3단계
+1. 올바른 패키지 명을 반환한다.
\ No newline at end of file
diff --git a/app/build.gradle b/app/build.gradle
index 7fe4e7e..9ecf161 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -69,6 +69,8 @@ dependencies {
     testImplementation 'org.jetbrains.kotlinx:kotlinx-coroutines-test:1.6.4'
     testImplementation 'com.google.truth:truth:1.1.3'
     testImplementation 'io.mockk:mockk:1.13.2'
+    // okhttp mock web server
+    testImplementation 'com.squareup.okhttp3:mockwebserver:4.9.1'
 
     // Instrumentation test
     androidTestImplementation "androidx.test:runner:1.5.2"
@@ -79,4 +81,6 @@ dependencies {
     androidTestImplementation 'io.mockk:mockk:1.13.2'
     androidTestImplementation 'de.mannodermaus.junit5:android-test-core:1.3.0'
     androidTestRuntimeOnly 'de.mannodermaus.junit5:android-test-runner:1.3.0'
+    // for context in instrumentation test
+    androidTestImplementation 'androidx.test:core:1.5.0'
 }
diff --git a/app/src/androidTest/java/com/malibin/study/github/ExampleInstrumentedTest.kt b/app/src/androidTest/java/com/malibin/study/github/ExampleInstrumentedTest.kt
index eba15b0..562464d 100644
--- a/app/src/androidTest/java/com/malibin/study/github/ExampleInstrumentedTest.kt
+++ b/app/src/androidTest/java/com/malibin/study/github/ExampleInstrumentedTest.kt
@@ -1,24 +1,21 @@
 package com.malibin.study.github
 
 import androidx.test.platform.app.InstrumentationRegistry
-import androidx.test.ext.junit.runners.AndroidJUnit4
-
+import org.junit.Assert.assertEquals
 import org.junit.Test
-import org.junit.runner.RunWith
-
-import org.junit.Assert.*
 
 /**
  * Instrumented test, which will execute on an Android device.
  *
  * See [testing documentation](http://d.android.com/tools/testing).
  */
-@RunWith(AndroidJUnit4::class)
+
 class ExampleInstrumentedTest {
     @Test
-    fun useAppContext() {
-        // Context of the app under test.
-        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
-        assertEquals("com.malibin.study.github", appContext.packageName)
+    fun `올바른_패키지_명을_반환한다`() {
+        //when
+        val actualResult = InstrumentationRegistry.getInstrumentation().targetContext
+        //then
+        assertEquals("com.malibin.study.github", actualResult.packageName)
     }
 }
diff --git a/app/src/test/java/com/malibin/study/github/data/repository/DefaultGithubProfileRepositoryTest.kt b/app/src/test/java/com/malibin/study/github/data/repository/DefaultGithubProfileRepositoryTest.kt
index 4bf8e8a..a533b87 100644
--- a/app/src/test/java/com/malibin/study/github/data/repository/DefaultGithubProfileRepositoryTest.kt
+++ b/app/src/test/java/com/malibin/study/github/data/repository/DefaultGithubProfileRepositoryTest.kt
@@ -93,7 +93,7 @@ internal class DefaultGithubProfileRepositoryTest {
         val actualResult = defaultGithubProfileRepository.getGithubProfile("name1")
         //then
         assertAll(
-            { assertThat(actualResult).isEqualTo(Result.success(gitHubProfile))},
+            { assertThat(actualResult.getOrNull()).isEqualTo(gitHubProfile)},
             { coVerify(exactly = 1) { fakeLocalGithubProfileSource.getGithubProfile("name1") } }
         )
     }