diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 817a739..4ca50a1 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -30,8 +30,8 @@ test:
     TEST_CONTAINER_NAME: "cre_backend_gradle_tests-$CI_COMMIT_REF_NAME"
   script:
     - docker run --name $TEST_CONTAINER_NAME $CI_REGISTRY_IMAGE_GRADLE gradle test
-    - mkdir test-results && docker cp $TEST_CONTAINER_NAME:/usr/src/cre/build/test-results/test/ test-results
   after_script:
+    - mkdir test-results && docker cp $TEST_CONTAINER_NAME:/usr/src/cre/build/test-results/test/ test-results
     - docker rm $TEST_CONTAINER_NAME
   artifacts:
     when: always
diff --git a/src/main/kotlin/dev/fyloz/trial/colorrecipesexplorer/model/Mix.kt b/src/main/kotlin/dev/fyloz/trial/colorrecipesexplorer/model/Mix.kt
index 1c75639..0b9f74a 100644
--- a/src/main/kotlin/dev/fyloz/trial/colorrecipesexplorer/model/Mix.kt
+++ b/src/main/kotlin/dev/fyloz/trial/colorrecipesexplorer/model/Mix.kt
@@ -26,7 +26,7 @@ data class Mix(
     @ManyToOne
     val recipe: Recipe,
 
-    @ManyToOne(cascade = [CascadeType.PERSIST])
+    @ManyToOne
     var mixType: MixType,
 
     @OneToMany(cascade = [CascadeType.ALL])
diff --git a/src/main/kotlin/dev/fyloz/trial/colorrecipesexplorer/service/MixService.kt b/src/main/kotlin/dev/fyloz/trial/colorrecipesexplorer/service/MixService.kt
index f4717f7..98fbb08 100644
--- a/src/main/kotlin/dev/fyloz/trial/colorrecipesexplorer/service/MixService.kt
+++ b/src/main/kotlin/dev/fyloz/trial/colorrecipesexplorer/service/MixService.kt
@@ -33,7 +33,7 @@ class MixServiceImpl(
     override fun save(entity: MixSaveDto): Mix {
         val recipe = recipeService.getById(entity.recipeId)
         val materialType = materialTypeService.getById(entity.materialTypeId)
-        val mixType = MixType(entity.name, materialType)
+        val mixType = mixTypeService.createForNameAndMaterialType(entity.name, materialType)
 
         var mix = save(mix(recipe = recipe, mixType = mixType))
         val mixMaterials =
diff --git a/src/main/resources/application-h2.properties b/src/main/resources/application-h2.properties
index 33d00af..346ad2a 100644
--- a/src/main/resources/application-h2.properties
+++ b/src/main/resources/application-h2.properties
@@ -1,5 +1,5 @@
-#spring.datasource.url=jdbc:h2:mem:cre
-spring.datasource.url=jdbc:h2:file:./workdir/recipes
+spring.datasource.url=jdbc:h2:mem:cre
+#spring.datasource.url=jdbc:h2:file:./workdir/recipes
 spring.datasource.username=sa
 spring.datasource.password=LWK4Y7TvEbNyhu1yCoG3
 spring.h2.console.path=/dbconsole
diff --git a/src/test/kotlin/dev/fyloz/trial/colorrecipesexplorer/service/MixServiceTest.kt b/src/test/kotlin/dev/fyloz/trial/colorrecipesexplorer/service/MixServiceTest.kt
index 79f13fd..3bdc9ad 100644
--- a/src/test/kotlin/dev/fyloz/trial/colorrecipesexplorer/service/MixServiceTest.kt
+++ b/src/test/kotlin/dev/fyloz/trial/colorrecipesexplorer/service/MixServiceTest.kt
@@ -56,6 +56,7 @@ class MixServiceTest : AbstractExternalModelServiceTest<Mix, MixSaveDto, MixUpda
             whenever(recipeService.getById(recipe.id!!)).doReturn(recipe)
             whenever(materialTypeService.getById(materialType.id!!)).doReturn(materialType)
             whenever(mixMaterialService.createFromMap(mixWithId, entitySaveDto.mixMaterials!!)).doReturn(mixMaterials)
+            whenever(mixTypeService.createForNameAndMaterialType(mixType.name, mixType.material.materialType!!)).doReturn(mixType)
             doReturn(true).whenever(service).existsById(mixWithId.id!!)
             doReturn(mixWithId).whenever(service).save(mix)
             doReturn(mixWithMaterials).whenever(service).update(mixWithMaterials)
@@ -66,6 +67,9 @@ class MixServiceTest : AbstractExternalModelServiceTest<Mix, MixSaveDto, MixUpda
             verify(service).update(mixWithMaterials)
             verify(recipeService).addMix(recipe, mix)
 
+            // Verify if this method is called instead of the MixType's constructor, which does not check if the name is already taken by a material.
+            verify(mixTypeService).createForNameAndMaterialType(mixType.name, mixType.material.materialType!!)
+
             assertEquals(mixWithMaterials, found)
         }
     }