diff --git a/놀이터(예제 코드 작성)/learn-with-making-clean-architecture/src/test/kotlin/com/banjjoknim/cleanarchitecture/user/adapter/in/web/ChangeNicknameWebAdapterTest.kt b/놀이터(예제 코드 작성)/learn-with-making-clean-architecture/src/test/kotlin/com/banjjoknim/cleanarchitecture/user/adapter/in/web/ChangeNicknameWebAdapterTest.kt
new file mode 100644
index 0000000..7fc3b23
--- /dev/null
+++ b/놀이터(예제 코드 작성)/learn-with-making-clean-architecture/src/test/kotlin/com/banjjoknim/cleanarchitecture/user/adapter/in/web/ChangeNicknameWebAdapterTest.kt	
@@ -0,0 +1,66 @@
+package com.banjjoknim.cleanarchitecture.user.adapter.`in`.web
+
+import com.banjjoknim.cleanarchitecture.user.application.port.`in`.ChangeNicknameResponseData
+import com.banjjoknim.cleanarchitecture.user.application.port.`in`.ChangeNicknameUseCase
+import com.fasterxml.jackson.databind.ObjectMapper
+import com.ninjasquad.springmockk.MockkBean
+import io.mockk.every
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest
+import org.springframework.http.MediaType
+import org.springframework.test.web.servlet.MockMvc
+import org.springframework.test.web.servlet.post
+import org.springframework.test.web.servlet.result.MockMvcResultHandlers
+import org.springframework.test.web.servlet.setup.DefaultMockMvcBuilder
+import org.springframework.test.web.servlet.setup.MockMvcBuilders
+import org.springframework.web.context.WebApplicationContext
+import org.springframework.web.filter.CharacterEncodingFilter
+
+@WebMvcTest(ChangeNicknameWebAdapter::class)
+class ChangeNicknameWebAdapterTest {
+
+    @Autowired
+    private lateinit var mockmvc: MockMvc
+
+    @Autowired
+    private lateinit var objectMapper: ObjectMapper
+
+    @MockkBean
+    private lateinit var changeNicknameUseCase: ChangeNicknameUseCase
+
+    @BeforeEach
+    fun setUp(webApplicationContext: WebApplicationContext) {
+        mockmvc = MockMvcBuilders.webAppContextSetup(webApplicationContext)
+            .addFilter<DefaultMockMvcBuilder>(CharacterEncodingFilter("UTF-8"))
+            .alwaysDo<DefaultMockMvcBuilder>(MockMvcResultHandlers.print())
+            .build()
+    }
+
+    @Test
+    fun `닉네임을 변경한다`() {
+        every { changeNicknameUseCase.changeNickname(any()) } returns ChangeNicknameResponseData(1L)
+        val request = ChangeNicknameRequest(1L, "banjjoknim")
+
+        mockmvc.post("/users") {
+            contentType = MediaType.APPLICATION_JSON
+            content = objectMapper.writeValueAsString(request)
+        }.andExpect {
+            content { json("""{"userId":1}""") }
+            status { isOk() }
+        }
+    }
+
+    @Test
+    fun `잘못된 닉네임 변경 요청에 BadRequest 응답을 반환한다`() {
+        val request = ChangeNicknameRequest(1L, "banjjoknim!!")
+
+        mockmvc.post("/users") {
+            contentType = MediaType.APPLICATION_JSON
+            content = objectMapper.writeValueAsString(request)
+        }.andExpect {
+            status { isBadRequest() }
+        }
+    }
+}