diff --git a/komga/src/test/kotlin/org/gotson/komga/infrastructure/metadata/comicrack/dto/ComicInfoTest.kt b/komga/src/test/kotlin/org/gotson/komga/infrastructure/metadata/comicrack/dto/ComicInfoTest.kt
index f71c439f..955fc641 100644
--- a/komga/src/test/kotlin/org/gotson/komga/infrastructure/metadata/comicrack/dto/ComicInfoTest.kt
+++ b/komga/src/test/kotlin/org/gotson/komga/infrastructure/metadata/comicrack/dto/ComicInfoTest.kt
@@ -8,10 +8,11 @@ import org.springframework.core.io.ClassPathResource
 
 class ComicInfoTest {
 
+  private val mapper = XmlMapper()
+
   @Test
   fun `given valid xml file when deserializing then properties are available`() {
     val file = ClassPathResource("comicrack/ComicInfo.xml")
-    val mapper = XmlMapper()
     val comicInfo = mapper.readValue<ComicInfo>(file.url)
 
     with(comicInfo) {
@@ -36,7 +37,6 @@ class ComicInfoTest {
   @Test
   fun `given another valid xml file when deserializing then properties are available`() {
     val file = ClassPathResource("comicrack/ComicInfo2.xml")
-    val mapper = XmlMapper()
     val comicInfo = mapper.readValue<ComicInfo>(file.url)
 
     with(comicInfo) {
@@ -64,7 +64,6 @@ class ComicInfoTest {
   @Test
   fun `given incorrect enum values when deserializing then it is ignored`() {
     val file = ClassPathResource("comicrack/InvalidEnumValues.xml")
-    val mapper = XmlMapper()
     val comicInfo = mapper.readValue<ComicInfo>(file.url)
 
     with(comicInfo) {