diff --git a/tests/assets/configs/basic_switched_network.yaml b/tests/assets/configs/basic_switched_network.yaml
index fed0f52d..799bb571 100644
--- a/tests/assets/configs/basic_switched_network.yaml
+++ b/tests/assets/configs/basic_switched_network.yaml
@@ -202,8 +202,6 @@ simulation:
           port_scan_p_of_success: 0.8
       services:
       - type: DNSClient
-        options:
-          dns_server: 192.168.1.10
       - type: DNSServer
         options:
           domain_mapping:
diff --git a/tests/assets/configs/fix_duration_one_item.yaml b/tests/assets/configs/fix_duration_one_item.yaml
index bd0fb61f..4163bcfd 100644
--- a/tests/assets/configs/fix_duration_one_item.yaml
+++ b/tests/assets/configs/fix_duration_one_item.yaml
@@ -200,8 +200,6 @@ simulation:
           port_scan_p_of_success: 0.8
       services:
       - type: DNSClient
-        options:
-          dns_server: 192.168.1.10
       - type: DNSServer
         options:
           domain_mapping:
@@ -232,8 +230,8 @@ simulation:
             server_password: arcd
       services:
         - type: DNSClient
-          options:
-            dns_server: 192.168.1.10
+          # options:
+          #   dns_server: 192.168.1.10
 
     links:
     - endpoint_a_hostname: switch_1
diff --git a/tests/assets/configs/software_fix_duration.yaml b/tests/assets/configs/software_fix_duration.yaml
index 1a28258b..2b72e85f 100644
--- a/tests/assets/configs/software_fix_duration.yaml
+++ b/tests/assets/configs/software_fix_duration.yaml
@@ -209,7 +209,7 @@ simulation:
       services:
       - type: DNSClient
         options:
-          dns_server: 192.168.1.10
+          # dns_server: 192.168.1.10
           fix_duration: 3
       - type: DNSServer
         options:
@@ -250,8 +250,6 @@ simulation:
             server_password: arcd
       services:
         - type: DNSClient
-          options:
-            dns_server: 192.168.1.10
 
     links:
     - endpoint_a_hostname: switch_1