diff --git a/build.py b/build.py
index f6db68d..f32588d 100644
--- a/build.py
+++ b/build.py
@@ -33,7 +33,7 @@ default_task = "dev"
 name = "ddadevops"
 MODULE = "not-used"
 PROJECT_ROOT_PATH = "."
-version = "4.3.2-dev2"
+version = "4.3.2-dev6"
 summary = "tools to support builds combining gopass, terraform, dda-pallet, aws & hetzner-cloud"
 description = __doc__
 authors = [Author("meissa GmbH", "buero@meissa-gmbh.de")]
diff --git a/src/main/python/ddadevops/domain/init_service.py b/src/main/python/ddadevops/domain/init_service.py
index 1afa1f3..8529665 100644
--- a/src/main/python/ddadevops/domain/init_service.py
+++ b/src/main/python/ddadevops/domain/init_service.py
@@ -112,9 +112,8 @@ class InitService:
         result = {}
         for name in credentials.mappings.keys():
             mapping = credentials.mappings[name]
-            env_value = self.environment_api.get(mapping.name_for_environment())
-            if env_value:
-                result[name] = env_value
+            if self.environment_api.is_defined(mapping.name_for_environment()):
+                result[name] = self.environment_api.get(mapping.name_for_environment())
             else:
                 if mapping.gopass_type() == GopassType.FIELD:
                     result[name] = self.credentials_api.gopass_field_from_path(
diff --git a/src/main/python/ddadevops/infrastructure/infrastructure.py b/src/main/python/ddadevops/infrastructure/infrastructure.py
index fda7c90..847bc57 100644
--- a/src/main/python/ddadevops/infrastructure/infrastructure.py
+++ b/src/main/python/ddadevops/infrastructure/infrastructure.py
@@ -58,8 +58,10 @@ class ImageApi:
         )
 
     def drun(self, name: str):
-        self.execution_api.execute_live(
-            f'docker run -it --entrypoint="" {name} /bin/bash'
+        run(
+            f'docker run -it --entrypoint="" {name} /bin/bash',
+            shell=True,
+            check=True,
         )
 
     def dockerhub_login(self, username: str, password: str):
@@ -134,6 +136,9 @@ class EnvironmentApi:
     def get(self, key):
         return environ.get(key)
 
+    def is_defined(self, key):
+        return key in environ
+
 
 class CredentialsApi:
     def __init__(self):
diff --git a/src/test/python/domain/helper.py b/src/test/python/domain/helper.py
index 7855dc3..7c6df4c 100644
--- a/src/test/python/domain/helper.py
+++ b/src/test/python/domain/helper.py
@@ -104,6 +104,9 @@ class EnvironmentApiMock:
     def get(self, key):
         return self.mappings.get(key, None)
 
+    def is_defined(self, key):
+        return key in self.mappings
+
 
 class CredentialsApiMock:
     def __init__(self, mappings):