diff --git a/src/main/python/ddadevops/release_mixin/infrastructure.py b/src/main/python/ddadevops/release_mixin/infrastructure.py
index a68977d..589dce8 100644
--- a/src/main/python/ddadevops/release_mixin/infrastructure.py
+++ b/src/main/python/ddadevops/release_mixin/infrastructure.py
@@ -1,4 +1,4 @@
-from .domain import Release, Version, ReleaseType
+from .domain import Release, Version, ReleaseType, EnvironmentKeys
 from .infrastructure_api import FileHandler, GitApi, EnvironmentApi
 
 class VersionRepository():
@@ -33,7 +33,7 @@ class VersionRepository():
 class ReleaseTypeRepository():
     def __init__(self, git_api: GitApi, environment_api: EnvironmentApi):
         self.git_api = git_api
-        self.environment_api = environment_api
+        self.environment_api = environment_api        
 
     @classmethod
     def from_git(cls, git_api: GitApi):
@@ -60,7 +60,7 @@ class ReleaseTypeRepository():
             return None
 
     def __get_release_type_environment(self) -> ReleaseType | None:
-        release_name = self.environment_api.get('RELEASE_TYPE')
+        release_name = self.environment_api.get(EnvironmentKeys.DDADEVOPS_RELEASE_TYPE.name)
 
         if release_name is None:
             return None
diff --git a/src/test/python/release_mixin/test_infrastructure.py b/src/test/python/release_mixin/test_infrastructure.py
index c0c491a..534a56d 100644
--- a/src/test/python/release_mixin/test_infrastructure.py
+++ b/src/test/python/release_mixin/test_infrastructure.py
@@ -54,27 +54,27 @@ def test_release_type_repository_git():
     assert release_type == None
 
 def test_release_type_repository_env():
-    sut = ReleaseTypeRepository.from_environment(MockEnvironmentApi({'RELEASE_TYPE': 'MINOR test'}))
+    sut = ReleaseTypeRepository.from_environment(MockEnvironmentApi({'DDADEVOPS_RELEASE_TYPE': 'MINOR test'}))
     release_type = sut.get_release_type()
     assert release_type is ReleaseType.MINOR
 
-    sut = ReleaseTypeRepository.from_environment(MockEnvironmentApi({'RELEASE_TYPE': 'MINOR'}))
+    sut = ReleaseTypeRepository.from_environment(MockEnvironmentApi({'DDADEVOPS_RELEASE_TYPE': 'MINOR'}))
     release_type = sut.get_release_type()
     assert release_type is ReleaseType.MINOR
 
-    sut = ReleaseTypeRepository.from_environment(MockEnvironmentApi({'RELEASE_TYPE': 'Major bla'}))
+    sut = ReleaseTypeRepository.from_environment(MockEnvironmentApi({'DDADEVOPS_RELEASE_TYPE': 'Major bla'}))
     release_type = sut.get_release_type()
     assert release_type == ReleaseType.MAJOR
 
-    sut = ReleaseTypeRepository.from_environment(MockEnvironmentApi({'RELEASE_TYPE': 'Patch bla'}))
+    sut = ReleaseTypeRepository.from_environment(MockEnvironmentApi({'DDADEVOPS_RELEASE_TYPE': 'Patch bla'}))
     release_type = sut.get_release_type()
     assert release_type == ReleaseType.PATCH
 
-    sut = ReleaseTypeRepository.from_environment(MockEnvironmentApi({'RELEASE_TYPE': 'Snapshot bla'}))
+    sut = ReleaseTypeRepository.from_environment(MockEnvironmentApi({'DDADEVOPS_RELEASE_TYPE': 'Snapshot bla'}))
     release_type = sut.get_release_type()
     assert release_type == ReleaseType.SNAPSHOT
 
-    sut = ReleaseTypeRepository.from_environment(MockEnvironmentApi({'RELEASE_TYPE': 'Random text'}))
+    sut = ReleaseTypeRepository.from_environment(MockEnvironmentApi({'DDADEVOPS_RELEASE_TYPE': 'Random text'}))
     release_type = sut.get_release_type()
     assert release_type == None