diff --git a/envs/monkey_zoo/blackbox/test_configurations/depth_1_a.py b/envs/monkey_zoo/blackbox/test_configurations/depth_1_a.py
index f702e3149..b043456a5 100644
--- a/envs/monkey_zoo/blackbox/test_configurations/depth_1_a.py
+++ b/envs/monkey_zoo/blackbox/test_configurations/depth_1_a.py
@@ -9,6 +9,8 @@ from .utils import (
     add_http_ports,
     add_subnets,
     add_tcp_ports,
+    replace_agent_configuration,
+    replace_propagation_credentials,
     set_maximum_depth,
 )
 
@@ -89,5 +91,9 @@ CREDENTIALS = (
 )
 
 depth_1_a_test_configuration = noop_test_configuration.copy()
-depth_1_a_test_configuration.agent_configuration = test_agent_configuration
-depth_1_a_test_configuration.propagation_credentials = CREDENTIALS
+replace_agent_configuration(
+    test_configuration=depth_1_a_test_configuration, agent_configuration=test_agent_configuration
+)
+replace_propagation_credentials(
+    test_configuration=depth_1_a_test_configuration, propagation_credentials=CREDENTIALS
+)
diff --git a/envs/monkey_zoo/blackbox/test_configurations/depth_2_a.py b/envs/monkey_zoo/blackbox/test_configurations/depth_2_a.py
index 396e9ed3e..a8b9a87a5 100644
--- a/envs/monkey_zoo/blackbox/test_configurations/depth_2_a.py
+++ b/envs/monkey_zoo/blackbox/test_configurations/depth_2_a.py
@@ -2,7 +2,14 @@ from common.agent_configuration import AgentConfiguration, PluginConfiguration
 from common.credentials import Credentials, Password, Username
 
 from .noop import noop_test_configuration
-from .utils import add_exploiters, add_subnets, add_tcp_ports, set_maximum_depth
+from .utils import (
+    add_exploiters,
+    add_subnets,
+    add_tcp_ports,
+    replace_agent_configuration,
+    replace_propagation_credentials,
+    set_maximum_depth,
+)
 
 
 # Tests:
@@ -38,5 +45,9 @@ CREDENTIALS = (
 )
 
 depth_2_a_test_configuration = noop_test_configuration.copy()
-depth_2_a_test_configuration.agent_configuration = test_agent_configuration
-depth_2_a_test_configuration.propagation_credentials = CREDENTIALS
+replace_agent_configuration(
+    test_configuration=depth_2_a_test_configuration, agent_configuration=test_agent_configuration
+)
+replace_propagation_credentials(
+    test_configuration=depth_2_a_test_configuration, propagation_credentials=CREDENTIALS
+)
diff --git a/envs/monkey_zoo/blackbox/test_configurations/depth_3_a.py b/envs/monkey_zoo/blackbox/test_configurations/depth_3_a.py
index 8f9bfdc70..a1de4430c 100644
--- a/envs/monkey_zoo/blackbox/test_configurations/depth_3_a.py
+++ b/envs/monkey_zoo/blackbox/test_configurations/depth_3_a.py
@@ -6,6 +6,8 @@ from .utils import (
     add_exploiters,
     add_subnets,
     add_tcp_ports,
+    replace_agent_configuration,
+    replace_propagation_credentials,
     set_keep_tunnel_open_time,
     set_maximum_depth,
 )
@@ -65,5 +67,9 @@ CREDENTIALS = (
 )
 
 depth_3_a_test_configuration = noop_test_configuration.copy()
-depth_3_a_test_configuration.agent_configuration = test_agent_configuration
-depth_3_a_test_configuration.propagation_credentials = CREDENTIALS
+replace_agent_configuration(
+    test_configuration=depth_3_a_test_configuration, agent_configuration=test_agent_configuration
+)
+replace_propagation_credentials(
+    test_configuration=depth_3_a_test_configuration, propagation_credentials=CREDENTIALS
+)
diff --git a/envs/monkey_zoo/blackbox/test_configurations/powershell_credentials_reuse.py b/envs/monkey_zoo/blackbox/test_configurations/powershell_credentials_reuse.py
index e8dd214e5..7938b54e2 100644
--- a/envs/monkey_zoo/blackbox/test_configurations/powershell_credentials_reuse.py
+++ b/envs/monkey_zoo/blackbox/test_configurations/powershell_credentials_reuse.py
@@ -1,7 +1,13 @@
 from common.agent_configuration import AgentConfiguration, PluginConfiguration
 
 from .noop import noop_test_configuration
-from .utils import add_exploiters, add_subnets, add_tcp_ports, set_maximum_depth
+from .utils import (
+    add_exploiters,
+    add_subnets,
+    add_tcp_ports,
+    replace_agent_configuration,
+    set_maximum_depth,
+)
 
 
 def _add_exploiters(agent_configuration: AgentConfiguration) -> AgentConfiguration:
@@ -30,4 +36,7 @@ test_agent_configuration = _add_subnets(test_agent_configuration)
 test_agent_configuration = _add_tcp_ports(test_agent_configuration)
 
 powershell_credentials_reuse_test_configuration = noop_test_configuration.copy()
-powershell_credentials_reuse_test_configuration.agent_configuration = test_agent_configuration
+replace_agent_configuration(
+    test_configuration=powershell_credentials_reuse_test_configuration,
+    agent_configuration=test_agent_configuration,
+)
diff --git a/envs/monkey_zoo/blackbox/test_configurations/smb_pth.py b/envs/monkey_zoo/blackbox/test_configurations/smb_pth.py
index 8863013e9..b99d21ca8 100644
--- a/envs/monkey_zoo/blackbox/test_configurations/smb_pth.py
+++ b/envs/monkey_zoo/blackbox/test_configurations/smb_pth.py
@@ -6,6 +6,8 @@ from .utils import (
     add_exploiters,
     add_subnets,
     add_tcp_ports,
+    replace_agent_configuration,
+    replace_propagation_credentials,
     set_keep_tunnel_open_time,
     set_maximum_depth,
 )
@@ -49,5 +51,9 @@ CREDENTIALS = (
 )
 
 smb_pth_test_configuration = noop_test_configuration.copy()
-smb_pth_test_configuration.agent_configuration = test_agent_configuration
-smb_pth_test_configuration.propagation_credentials = CREDENTIALS
+replace_agent_configuration(
+    test_configuration=smb_pth_test_configuration, agent_configuration=test_agent_configuration
+)
+replace_propagation_credentials(
+    test_configuration=smb_pth_test_configuration, propagation_credentials=CREDENTIALS
+)
diff --git a/envs/monkey_zoo/blackbox/test_configurations/utils.py b/envs/monkey_zoo/blackbox/test_configurations/utils.py
index c1b6b54f8..3872230c0 100644
--- a/envs/monkey_zoo/blackbox/test_configurations/utils.py
+++ b/envs/monkey_zoo/blackbox/test_configurations/utils.py
@@ -1,6 +1,8 @@
-from typing import Sequence
+from typing import Sequence, Tuple
 
 from common.agent_configuration import AgentConfiguration, PluginConfiguration
+from common.credentials import Credentials
+from envs.monkey_zoo.blackbox.test_configurations.test_configuration import TestConfiguration
 
 
 def add_exploiters(
@@ -84,3 +86,15 @@ def set_maximum_depth(
     agent_configuration_copy.propagation.maximum_depth = maximum_depth
 
     return agent_configuration_copy
+
+
+def replace_agent_configuration(
+    test_configuration: TestConfiguration, agent_configuration: AgentConfiguration
+):
+    test_configuration.agent_configuration = agent_configuration
+
+
+def replace_propagation_credentials(
+    test_configuration: TestConfiguration, propagation_credentials: Tuple[Credentials, ...]
+):
+    test_configuration.propagation_credentials = propagation_credentials
diff --git a/envs/monkey_zoo/blackbox/test_configurations/wmi_mimikatz.py b/envs/monkey_zoo/blackbox/test_configurations/wmi_mimikatz.py
index c525f5ca5..db8b6fa1d 100644
--- a/envs/monkey_zoo/blackbox/test_configurations/wmi_mimikatz.py
+++ b/envs/monkey_zoo/blackbox/test_configurations/wmi_mimikatz.py
@@ -7,6 +7,8 @@ from .utils import (
     add_exploiters,
     add_subnets,
     add_tcp_ports,
+    replace_agent_configuration,
+    replace_propagation_credentials,
     set_maximum_depth,
 )
 
@@ -54,5 +56,9 @@ CREDENTIALS = (
 )
 
 wmi_mimikatz_test_configuration = noop_test_configuration.copy()
-wmi_mimikatz_test_configuration.agent_configuration = test_agent_configuration
-wmi_mimikatz_test_configuration.propagation_credentials = CREDENTIALS
+replace_agent_configuration(
+    test_configuration=wmi_mimikatz_test_configuration, agent_configuration=test_agent_configuration
+)
+replace_propagation_credentials(
+    test_configuration=wmi_mimikatz_test_configuration, propagation_credentials=CREDENTIALS
+)
diff --git a/envs/monkey_zoo/blackbox/test_configurations/zerologon.py b/envs/monkey_zoo/blackbox/test_configurations/zerologon.py
index 8e9a14369..87b533aed 100644
--- a/envs/monkey_zoo/blackbox/test_configurations/zerologon.py
+++ b/envs/monkey_zoo/blackbox/test_configurations/zerologon.py
@@ -1,7 +1,13 @@
 from common.agent_configuration import AgentConfiguration, PluginConfiguration
 
 from .noop import noop_test_configuration
-from .utils import add_exploiters, add_subnets, add_tcp_ports, set_maximum_depth
+from .utils import (
+    add_exploiters,
+    add_subnets,
+    add_tcp_ports,
+    replace_agent_configuration,
+    set_maximum_depth,
+)
 
 
 def _add_exploiters(agent_configuration: AgentConfiguration) -> AgentConfiguration:
@@ -27,4 +33,6 @@ test_agent_configuration = _add_tcp_ports(test_agent_configuration)
 test_agent_configuration = _add_subnets(test_agent_configuration)
 
 zerologon_test_configuration = noop_test_configuration.copy()
-zerologon_test_configuration.agent_configuration = test_agent_configuration
+replace_agent_configuration(
+    test_configuration=zerologon_test_configuration, agent_configuration=test_agent_configuration
+)