diff --git a/src/test/kotlin/roomescape/reservation/infrastructure/persistence/ReservationRepositoryTest.kt b/src/test/kotlin/roomescape/reservation/infrastructure/persistence/ReservationRepositoryTest.kt
index f911261b..0ae319ae 100644
--- a/src/test/kotlin/roomescape/reservation/infrastructure/persistence/ReservationRepositoryTest.kt
+++ b/src/test/kotlin/roomescape/reservation/infrastructure/persistence/ReservationRepositoryTest.kt
@@ -39,7 +39,7 @@ class ReservationRepositoryTest(
             }
 
             test("입력된 시간과 일치하는 예약을 반환한다.") {
-                assertSoftly(reservationRepository.findByTime(time)) {
+                assertSoftly(reservationRepository.findAllByTime(time)) {
                     it shouldHaveSize 1
                     assertSoftly(it.first().time.startAt) { result ->
                         result.hour shouldBe time.startAt.hour
diff --git a/src/test/kotlin/roomescape/time/business/TimeServiceTest.kt b/src/test/kotlin/roomescape/time/business/TimeServiceTest.kt
index 58d8a17a..ba12249e 100644
--- a/src/test/kotlin/roomescape/time/business/TimeServiceTest.kt
+++ b/src/test/kotlin/roomescape/time/business/TimeServiceTest.kt
@@ -6,10 +6,9 @@ import io.kotest.matchers.shouldBe
 import io.mockk.every
 import io.mockk.mockk
 import org.springframework.data.repository.findByIdOrNull
-import org.springframework.http.HttpStatus
-import roomescape.common.exception.ErrorType
-import roomescape.common.exception.RoomescapeException
 import roomescape.reservation.infrastructure.persistence.ReservationRepository
+import roomescape.time.exception.TimeErrorCode
+import roomescape.time.exception.TimeException
 import roomescape.time.infrastructure.persistence.TimeRepository
 import roomescape.time.web.TimeCreateRequest
 import roomescape.util.TimeFixture
@@ -25,63 +24,70 @@ class TimeServiceTest : FunSpec({
     )
 
     context("findTimeById") {
-        test("시간을 찾을 수 없으면 400 에러를 던진다.") {
+        test("시간을 찾을 수 없으면 예외 응답") {
             val id = 1L
 
             every { timeRepository.findByIdOrNull(id) } returns null
 
-            shouldThrow<RoomescapeException> {
+            shouldThrow<TimeException> {
                 timeService.findById(id)
-            }.apply {
-                errorType shouldBe ErrorType.TIME_NOT_FOUND
-                httpStatus shouldBe HttpStatus.BAD_REQUEST
+            }.also {
+                it.errorCode shouldBe TimeErrorCode.TIME_NOT_FOUND
             }
         }
     }
 
-    context("addTime") {
-        test("중복된 시간이 있으면 409 에러를 던진다.") {
-            val request = TimeCreateRequest(startAt = LocalTime.of(10, 0))
+    context("createTime") {
+        val request = TimeCreateRequest(startAt = LocalTime.of(10, 0))
 
+        test("정상 저장") {
+            every { timeRepository.existsByStartAt(request.startAt) } returns false
+            every { timeRepository.save(any()) } returns TimeFixture.create(
+                    id = 1L,
+                    startAt = request.startAt
+            )
+
+            val response = timeService.createTime(request)
+            response.id shouldBe 1L
+        }
+
+        test("중복된 시간이 있으면 예외 응답") {
             every { timeRepository.existsByStartAt(request.startAt) } returns true
 
-            shouldThrow<RoomescapeException> {
+            shouldThrow<TimeException> {
                 timeService.createTime(request)
-            }.apply {
-                errorType shouldBe ErrorType.TIME_DUPLICATED
-                httpStatus shouldBe HttpStatus.CONFLICT
+            }.also {
+                it.errorCode shouldBe TimeErrorCode.TIME_DUPLICATED
             }
         }
     }
 
     context("removeTimeById") {
-        test("시간을 찾을 수 없으면 400 에러를 던진다.") {
+        test("시간을 찾을 수 없으면 예외 응답") {
             val id = 1L
 
             every { timeRepository.findByIdOrNull(id) } returns null
 
-            shouldThrow<RoomescapeException> {
+            shouldThrow<TimeException> {
                 timeService.deleteTime(id)
-            }.apply {
-                errorType shouldBe ErrorType.TIME_NOT_FOUND
-                httpStatus shouldBe HttpStatus.BAD_REQUEST
+            }.also {
+                it.errorCode shouldBe TimeErrorCode.TIME_NOT_FOUND
             }
         }
 
-        test("예약이 있는 시간이면 409 에러를 던진다.") {
+        test("예약이 있는 시간이면 예외 응답") {
             val id = 1L
             val time = TimeFixture.create()
 
             every { timeRepository.findByIdOrNull(id) } returns time
 
-            every { reservationRepository.findByTime(time) } returns listOf(mockk())
+            every { reservationRepository.findAllByTime(time) } returns listOf(mockk())
 
-            shouldThrow<RoomescapeException> {
+            shouldThrow<TimeException> {
                 timeService.deleteTime(id)
-            }.apply {
-                errorType shouldBe ErrorType.TIME_IS_USED_CONFLICT
-                httpStatus shouldBe HttpStatus.CONFLICT
+            }.also {
+                it.errorCode shouldBe TimeErrorCode.TIME_ALREADY_RESERVED
             }
         }
     }
-})
\ No newline at end of file
+})
diff --git a/src/test/kotlin/roomescape/time/web/TimeControllerTest.kt b/src/test/kotlin/roomescape/time/web/TimeControllerTest.kt
index 4ce52364..19ae8465 100644
--- a/src/test/kotlin/roomescape/time/web/TimeControllerTest.kt
+++ b/src/test/kotlin/roomescape/time/web/TimeControllerTest.kt
@@ -12,9 +12,9 @@ import org.springframework.data.repository.findByIdOrNull
 import org.springframework.http.MediaType
 import org.springframework.test.web.servlet.MockMvc
 import roomescape.common.config.JacksonConfig
-import roomescape.common.exception.ErrorType
 import roomescape.reservation.infrastructure.persistence.ReservationRepository
 import roomescape.time.business.TimeService
+import roomescape.time.exception.TimeErrorCode
 import roomescape.time.infrastructure.persistence.TimeEntity
 import roomescape.time.infrastructure.persistence.TimeRepository
 import roomescape.util.ReservationFixture
@@ -129,7 +129,8 @@ class TimeControllerTest(
                     }
                 }
 
-                Then("동일한 시간이 존재하면 409 응답") {
+                Then("동일한 시간이 존재하면 예외 응답") {
+                    val expectedError = TimeErrorCode.TIME_DUPLICATED
                     every {
                         timeRepository.existsByStartAt(time)
                     } returns true
@@ -139,10 +140,10 @@ class TimeControllerTest(
                             endpoint = endpoint,
                             body = request,
                     ) {
-                        status { isConflict() }
+                        status { isEqualTo(expectedError.httpStatus.value()) }
                         content {
                             contentType(MediaType.APPLICATION_JSON)
-                            jsonPath("$.errorType") { value(ErrorType.TIME_DUPLICATED.name) }
+                            jsonPath("$.code") { value(expectedError.errorCode) }
                         }
                     }
                 }
@@ -185,8 +186,9 @@ class TimeControllerTest(
                     }
                 }
 
-                Then("없는 시간을 조회하면 400 응답") {
+                Then("없는 시간을 조회하면 예외 응답") {
                     val id = 1L
+                    val expectedError = TimeErrorCode.TIME_NOT_FOUND
                     every {
                         timeRepository.findByIdOrNull(id)
                     } returns null
@@ -195,32 +197,33 @@ class TimeControllerTest(
                             mockMvc = mockMvc,
                             endpoint = "/times/$id",
                     ) {
-                        status { isBadRequest() }
+                        status { isEqualTo(expectedError.httpStatus.value()) }
                         content {
                             contentType(MediaType.APPLICATION_JSON)
-                            jsonPath("$.errorType") { value(ErrorType.TIME_NOT_FOUND.name) }
+                            jsonPath("$.code") { value(expectedError.errorCode) }
                         }
                     }
                 }
 
-                Then("예약이 있는 시간을 삭제하면 409 응답") {
+                Then("예약이 있는 시간을 삭제하면 예외 응답") {
                     val id = 1L
+                    val expectedError = TimeErrorCode.TIME_ALREADY_RESERVED
                     every {
                         timeRepository.findByIdOrNull(id)
                     } returns TimeFixture.create(id = id)
 
                     every {
-                        reservationRepository.findByTime(any())
+                        reservationRepository.findAllByTime(any())
                     } returns listOf(ReservationFixture.create())
 
                     runDeleteTest(
                             mockMvc = mockMvc,
                             endpoint = "/times/$id",
                     ) {
-                        status { isConflict() }
+                        status { isEqualTo(expectedError.httpStatus.value()) }
                         content {
                             contentType(MediaType.APPLICATION_JSON)
-                            jsonPath("$.errorType") { value(ErrorType.TIME_IS_USED_CONFLICT.name) }
+                            jsonPath("$.code") { value(expectedError.errorCode) }
                         }
                     }
                 }